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X-WR-CALNAME:CESOC - Center for Earth System Observation and Computational Analysis
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X-WR-CALDESC:Events for CESOC - Center for Earth System Observation and Computational Analysis
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251208T101500
DTEND;TZID=Europe/Berlin:20251208T113000
DTSTAMP:20251126T152211Z
CREATED:20251126T152211Z
LAST-MODIFIED:20251126T152211Z
UID:8827-1765188900-1765193400@cesoc.net
SUMMARY:[DETECT] Alex Owusu Bariman - Biophysical Assessment of Climate Change Severity in the Upper East Region\, Ghana
DESCRIPTION:CRC DETECT invites you to their Land & Climate Seminar featuring Alex Owusu Bariman\, who will be giving a talk with the title: \nBiophysical Assessment of Climate Change Severity in the Upper East Region\, Ghana\nDate & Time: 08.12.2025 at 10:15 (CST) \nMore information is available here: https://sfb1502.de \n 
URL:https://cesoc.net/event/owusu/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251203T101500
DTEND;TZID=Europe/Berlin:20251203T113000
DTSTAMP:20251124T162941Z
CREATED:20251124T162941Z
LAST-MODIFIED:20251124T162941Z
UID:8825-1764756900-1764761400@cesoc.net
SUMMARY:Julian Quinting - ML-based weather forecasts for research on the sub-seasonal time scale – challenges and opportunities
DESCRIPTION:CESOC kindly invites you to a talk given by Prof Dr Julian Quinting\, Professor for Energy Meteorology at the Institute for Geophysics and Meteorology and Research Scientist at the Institute of Energy Economics the Universität zu Köln\, with the title: \nML-based weather forecasts for research on the sub-seasonal time scale – challenges and opportunities\nDate: 3 December 2025\nTime: 10:15 CEST\nLocation: Forschungszentrum Juelich\,Building 14.14\, Room BR6 (2nd floor). \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nWeather forecasting is undergoing a radical change thanks to the extremely successful use of ML-based weather forecasting models. Models trained based on reanalysis data are achieving impressive results and show improvements over numerical weather prediction (NWP) models for a range of variables. In addition\, the required computing costs are many times lower\, making ML-based models attractive for generating ensemble forecasts on the sub-seasonal time scale. In this talk\, I will first present different approaches for generating initial condition perturbations for ML-based ensemble forecasts in a cost-effective manner. A particular focus is on the calculation of singular vectors\, which enable targeted perturbations of the initial state. In the second part of the presentation\, I will introduce the concept of relaxation experiments using ML-based and NWP models to study atmospheric predictability on the sub-seasonal timescale emerging from tropical-extratropical teleconnections. The comparison shows that the loss of skill in NWP models is much more strongly influenced by epistemic uncertainties than in ML-based weather prediction models. Further analyses suggest that some of these uncertainties can be attributed to the representation of tropical waves. \nBio: https://www.ewi.uni-koeln.de/de/team/julian-quinting/
URL:https://cesoc.net/event/quinting/
LOCATION:JSC – FZ Jülich\, Wilhelm-Johnen-Straße\, 52428 Jülich\, Wilhelm-Johnen-Straße\, 52428\, Germany
CATEGORIES:CESOC Colloquium,Talk,winter term 2025-26
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251202T160000
DTEND;TZID=Europe/Berlin:20251202T170000
DTSTAMP:20250804T145505Z
CREATED:20250804T145505Z
LAST-MODIFIED:20250804T145505Z
UID:8813-1764691200-1764694800@cesoc.net
SUMMARY:Tiziano Maestri - Far- and Mid-Infrared Radiances in All-Sky conditions: simulations and real data inversion
DESCRIPTION:CESOC kindly invites you to a talk given by Dr. Tiziano Maestri\, from University of Bologna\, Physics and Astronomy Department “Augusto Righi”\, Bologna\, Italy\, with the title: \nFar- and Mid-Infrared Radiances in All-Sky Conditions: Simulations and Real Data Inversion\nDate: 02 December 2025\nTime: 16:00 CEST\nLocation: University of Cologne \nPlease use the entrance at Höninger Weg 100\, 50969 Cologne. Ring the bell labeled “Hörsaal Universität Köln – Öffnungszeit 7–18 Uhr” to enter; the door will open automatically. The session takes place in Lecture Hall 4.001 on the 4th floor. \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nThe role played by Far Infra-Red (FIR) radiation in shaping the Earth’s energy balance and its sensitivity to essential climate variables such as temperature\, water vapor\, surface emissivity\, and clouds is well recognized by the scientific community. In this regard\, the European Space Agency (ESA) selected the Far-infrared Outgoing Radiation Understanding and Monitoring (FORUM) mission as its ninth Earth Explorer\, scheduled to launch in 2027. FORUM will measure the outgoing longwave radiation in the spectral range from 100 to 1600 cm−1\, with 0.5 cm−1 (un-apodized) spectral resolution. On its side\, NASA launched\, in 2024\, two CubeSats carrying the Polar Radiant Energy in the Far-InfraRed Experiment (PREFIRE) which are measuring the 0-54 ????m region at 0.84 ????m spectral resolution.\nIn this work we focus on clous studies and present the last progresses obtained on cloud identification\, radiative modelling and properties retrieval using Mid Infra-Red and FIR channels.\nFirst\, we show the application of the Cloud Identification and Classification (CIC) algorithm [Maestri et al.\, 2019] to ground-based observations for the detection of Antarctic clouds. Cloud occurrence time series in the timeframe 2014–2020 are analysed and the cloud radiative effects are discussed. Ground-based cloud classifications are compared to satellite-derived products of the Infrared Atmospheric Sounding Interferometer (IASI) flying on MetOp A\, B\, and C.\nSuccessively\, we introduce a physical\, fast and accurate rt code\, sigma-FORUM\, which relies on simplifications of the multiple scattering term. We focus on scaling methods operating at FIR and in presence of scattering layers (both clouds and aerosols) which can be adopted in inversion processes for the definition of satellite level 2 products or simply for the analysis of spectrally remotely sensed radiance fields. The work discusses the limits of the Chou approximation [Chou et al.\, 1999; Martinazzo et al.\, 2021] when applied to radiance simulations and provides a characterization of the impact of the Chou adjustment proposed by Tang et al. in 2018 for fluxes and implemented\, in the sigma-FORUM forward model\, using an innovative scheme for radiance computations [Masiello et al.\, 2024; Maestri et al.\, 2024]. To assess the algorithm performances\, results obtained using sigma-FORUM are compared to those derived with a discrete-ordinate based radiative transfer model (DISORT) for a wide range of physical and optical properties of ice and liquid water clouds and for multiple atmospheric conditions. Additionally\, we discuss the algorithm effectiveness in simulating a set of ECMWF analyses on a global scale. For this purpose\, we compare the fast available solutions to observations of the IASI which are also used for the derivation of the clouds and atmospheric parameters using a new inversion code (iota-FORUM) based on sigma-FORUM. \nBio: \nTiziano Maestri is Associate Professor at the Physics and Astronomy Department “Augusto Righi” of the University of Bologna where he teaches in the master’s degrees of “Physics of Earth’s interior\, Ocean and Atmosphere” and “Science of Climate”. The main part of the scientific activity is currently related to the European Space Agency satellite mission FORUM (The Far-infrared Outgoing Radiation Understanding and Monitoring) of which Tiziano Maestri is one of the proposers and developers. He is the PI of the ASI “FIT-FORUM” and of the ESA “FORUM E2E Simulator” projects. TM is also involved in the modelling of radiative transfer at limb in support of the CAIRT (Changing-Atmosphere InfraRed Tomography) ESA 11th Earth Explorer candidate Mission with 3 open projects: the ASI “CASIA-CAIRT”\, and the ESA “CAIRTEX” and “PerREC” projects. He participates in national extended partnerships such as the “Space It Up” project funded by ASI and MUR and the “RETURN” project funded by the European Union Next-GenerationEU. TM leads the radiative transfer and remote sensing group at University of Bologna. He is elected member (2024-28) of the International Radiation Commission.
URL:https://cesoc.net/event/maestri/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,winter term 2025-26
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251201T160000
DTEND;TZID=Europe/Berlin:20251201T170000
DTSTAMP:20251125T095006Z
CREATED:20251125T095006Z
LAST-MODIFIED:20251125T095006Z
UID:8826-1764604800-1764608400@cesoc.net
SUMMARY:Julian Quinting - Inaugural lecture: Subseasonal Forecasts for Energy Economics
DESCRIPTION:CESOC kindly invites you to the inaugural lecture given by Prof Dr Julian Quinting\, Professor for Energy Meteorology at the Institute for Geophysics and Meteorology and Research Scientist at the Institute of Energy Economics the Universität zu Köln\, with the title: \nSubseasonal Forecasts for Energy Economics\nDate: 01 December 2025\nTime: 16:00 CEST\nLocation: Geo-/Bio-Hörsaal\, Zülpicher Str. 49a\,University of Cologne \n\nBio: https://www.ewi.uni-koeln.de/de/team/julian-quinting/
URL:https://cesoc.net/event/julian-quinting-inaugural-lecture-subseasonal-forecasts-for-energy-economics/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:winter term 2025-26
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251124T101500
DTEND;TZID=Europe/Berlin:20251124T113000
DTSTAMP:20251104T084108Z
CREATED:20251104T084108Z
LAST-MODIFIED:20251104T084108Z
UID:8819-1763979300-1763983800@cesoc.net
SUMMARY:[DETECT] Anna Klos - Water vapor variability and trends from GNSS
DESCRIPTION:CRC DETECT invites you to their Land & Climate Seminar featuring Anna Klos\, who will be giving a talk with the title: \nWater vapor variability and trends from GNSS\nDate & Time: 24.11.2025 at 10:15 (CST) \nMore information is available here: https://sfb1502.de
URL:https://cesoc.net/event/klos/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251124T100000
DTEND;TZID=Europe/Berlin:20251124T110000
DTSTAMP:20251117T131745Z
CREATED:20251117T131745Z
LAST-MODIFIED:20251117T131745Z
UID:8822-1763978400-1763982000@cesoc.net
SUMMARY:Richard Forbes - Predicting the weather at ECMWF: Improving physics-based modelling in an increasingly data-driven world
DESCRIPTION:CESOC kindly invites you to a talk given by Dr. Richard Forbes (ECMWF) with the title: \nPredicting the weather at ECMWF: Improving physics-based modelling in an increasingly data-driven world\nDate: 24 November 2025\nTime: 10:00 (Berlin time)\nLocation: University of Cologne \nPlease use the entrance at Höninger Weg 100\, 50969 Cologne. Ring the bell labeled “Hörsaal Universität Köln – Öffnungszeit 7–18 Uhr” to enter; the door will open automatically. The session takes place in Lecture Hall 4.001 on the 4th floor. \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nOver the last 50 years at ECMWF and at meteorological services across the world\, we have seen remarkable progress in physics-based numerical weather prediction (NWP). More recently\, the emergence of data-driven machine learning weather prediction (MLWP) has offered a step increase in forecast skill and is now also providing weather forecasts every day (e.g. AIFS\, AICON). Progress is rapid and machine learning will become an increasing part of weather forecast systems going forward\, but physics-based models will continue to play a vital role. Whether this role is as a parallel reference system\, part of a hybrid-ML system or providing ML training data\, it is imperative to continue to push forward the improvement of the physical model. \nThe accurate representation of subgrid-scale physical processes remains a critical challenge for improving forecasts\, and the effective use of observations is crucial to enhance the accuracy of parametrization schemes and reduce systematic errors. One example is the recent EarthCARE satellite mission with its synergistic lidar\, radar\, and radiometer measurements\, which is providing unprecedented insights into clouds\, precipitation\, aerosol\, radiation and their interactions. \nThis presentation will explore these themes and describe recent progress on the physical global NWP model (IFS) developments at ECMWF\, particularly highlighting clouds and convection\, and specifically how using observations from the EarthCARE satellite is helping to constrain physical processes\, with benefits for the next generation of Earth-system models\, and for weather prediction in whatever form it may take. \nBio: https://www.ecmwf.int/en/about/who-we-are/staff-profiles/richard-forbes
URL:https://cesoc.net/event/richard-forbes-predicting-the-weather-at-ecmwf/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,winter term 2025-26
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251119T101500
DTEND;TZID=Europe/Berlin:20251119T120000
DTSTAMP:20251117T131100Z
CREATED:20251117T131100Z
LAST-MODIFIED:20251117T131100Z
UID:8821-1763547300-1763553600@cesoc.net
SUMMARY:Philip Stier - Towards constraining global cloud-aerosol interactions combining km-scale climate models with machine learning
DESCRIPTION:We would like to invite you to a KPA-IMfESS talk given by Prof. Philip Stier\, Department of Physics\, University Oxford\, UK with the title: \nTowards constraining global cloud-aerosol interactions combining km-scale climate models with machine learning\nDate: Wednesday\, November 19\, 2025 at 10:15 a.m. \nLocation: University of Cologne\, Institute for Geophysics and Meteorology (4th floor\, lecture hall 4.001\, Höninger Weg 100\, Köln)\n \nIt will also be streamed online. For the LogIn details\, please get in touch with us. \nPhilip Stier is Professor of Atmospheric Physics in the Department of Physics\, where he leads the Climate Processes Group\, and a Fellow of Reuben College. He also serves as Director of Intelligent Earth – Oxford\’s UKRI AI Centre for Doctoral Training in AI for the Environment and serves on the steering group of the Oxford Climate Research Network. \nHis research addresses physical climate processes in the context of anthropogenic perturbations to the Earth system as the underlying cause of climate change and air pollution. Focal points of his research are cloud and aerosol physics\, their interactions and their role in the climate system. In his Climate Processes Group they combine complex numerical models with Earth observations and AI / Machine Learning to advance their theoretical understanding and predictability of the climate system. \nAbstract:\nAerosol-cloud interactions have persistently remained the single greatest uncertainty in anthropogenic perturbations to the climate system. The associated radiative effects have traditionally been assessed by global general circulation models (GCMs)\, aiming to model the chain of microphysical processes from aerosols acting as cloud condensation via cloud microphysics to the global energy balance. However\, this relies on a complete representation of a very complex process chain and has been shown to be subject to large and persistent uncertainties. Moreover\, significant structural limitations remain\, in particular related to the intrinsic sub-grid scale coupling of aerosols and clouds. The emergence of global km-scale models provides an opportunity to overcome some of these limitations and to explore previously unresolved aerosol phenomena explicitly\, including aerosol-convection interactions. However\, they remain insufficiently constrained by observations. \nIn this presentation\, I will highlight the potential of global km-scale climate models to make progress on our understanding of cloud-aerosol interactions\, with a particular focus on aerosol-convection interactions. Starting from regional km-scale simulations using ICON with idealised aerosol perturbations from the MACv2-SP plume model\, we demonstrate the potential to extend this work to global kilometre-scale modelling. This work motivates our development of the reduced complexity aerosol model HAM-lite\, suitable for long-term global km-scale modelling of aerosol-convection interactions using ICON. I will present novel approaches for the evaluation of km-scale models\, including cloud tracking and machine learning. Their systematic application will provide the foundation for future observationally constrained assessments.
URL:https://cesoc.net/event/philip-stier-towards-constraining-global-cloud-aerosol-interactions-combining-km-scale-climate-models-with-machine-learning/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,winter term 2025-26
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251105T080000
DTEND;TZID=Europe/Berlin:20251107T170000
DTSTAMP:20250829T113947Z
CREATED:20250829T113947Z
LAST-MODIFIED:20250829T113947Z
UID:8815-1762329600-1762534800@cesoc.net
SUMMARY:[AlgoEarth] Learning from limited data in Earth system sciences: optimal selection of datasets and methods
DESCRIPTION:We kindly invite you to join us on November 5-7 to a workshop taking part within the semester of Algorithmic Earth System Sciences (AlgoEarth) at the University of Cologne (Please use the entrance at Höninger Weg 100\, 50969 Cologne. Ring the bell labeled “Hörsaal Universität Köln – Öffnungszeit 7–18 Uhr” to enter; the door will open automatically. The session takes place in Lecture Hall 4.001 on the 4th floor.): \nLearning from limited data in Earth system sciences: optimal selection of datasets and methods \nThe workshop will take place at the University of Cologne. The goal is to bring together experts in methods development and in Earth System applications to tackle specific problems arising in learning tasks when the data availability is limited. Please see the text below for more detailed information and invited contributions. \nMore information is provided here:  https://imfess.uni-koeln.de/algoearth/events/workshop-learning-from-limited-data-in-earth-system-sciences#c175402 \nPlease register until September 15 under this link (the registration is free of charge): https://survey.uni-koeln.de/index.php/921438?lang=en \n \nLearning from limited data in Earth system sciences: optimal selection of datasets and methods\nSmall data challenges are particularly common in Earth System Sciences. Examples include the study of rare and extreme events\, which tend to have high societal impact but are often poorly forecasted by classical models. The workshop will discuss targeted machine learning methods for “small data” problems – when the underlying learning task is highly underdetermined\, due to a large problem dimension relative to the size of training datasets.  The goal is to bring together experts of data and computer sciences with experts of Earth system sciences that use and possibly develop such methods. We will discuss and identify: \n\nOptimal selection or treatment of data: How can one augment the information content of the limited dataset by smart data selection or preprocessing approaches? How can one benefit from multiple data sources?\nHighly efficient approaches to the small data problem\, as well as overfitting challenges in artificial intelligence\nTechniques to study and improve reliability of machine learning methods and quantify uncertainty.\nKey challenges motivated by AI application in Earth system sciences.\n\n Invited Speakers: \n\nClaudia Acquistapace\nDavide Bassetti\nDwaipayan Chatterjee\nFrancesco Marra\nJulian Quinting\nNedjeljka Zagar\n\nWe welcome contributions related to: \n\nMethods that can learn efficiently from little data\nOptimizing the information content from limited data (e.g. for extreme events such as hail or rain floods\, using alternative data sources\, fine-tuning methodologies\, etc.)\nOptimizing loss/fitness functions for rare events\, e.g. reweighing\nMethods that can provide guarantees on false positive discovery rates\nMethods that disentangle epistemic and aleatoric uncertainty\nApplication-specific interpretability methods\n\nFor further information about the AlgoEarth Semester\, please visit our website.
URL:https://cesoc.net/event/algoearth-learning-from-limited-data-in-earth-system-sciences-optimal-selection-of-datasets-and-methods/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:AlgoEarth
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251104T150000
DTEND;TZID=Europe/Berlin:20251104T160000
DTSTAMP:20241001T083050Z
CREATED:20241001T083050Z
LAST-MODIFIED:20241001T083050Z
UID:8788-1762268400-1762272000@cesoc.net
SUMMARY:Susanne Glaser - Space Geodetic Techniques for Earth System Observation
DESCRIPTION:CESOC kindly invites you to a talk given by Prof. Susanne Glaser\, from the Institute of Geodesy and Geoinformation\, University of Bonn\, talking on their work \n“Space Geodetic Techniques for Earth System Observation”\nDate:Tuesday\, 04 Nov. 2025\nTime: 15:00 (CET)\nLocation: Bonn and Online \nIt is open to any interested person within the CESOC research disciplines (any Earth system sciences\, mathematics or computer science).\nPlease contact info[@]cesoc.net\, if you would like to participate. \n\nAbstract:\nDifferent space geodetic techniques are combined to determine highly accurate and long-term stable global geodetic reference frames which serve as indispensable absolute basis for the relative only geodetic measurements. Currently achieved accuracies of the global reference frames do not meet the requirements to reliable monitor global processes like the global sea level rise. This presentation will cover two main research fields of different combination strategies and technological developments of the space geodetic techniques to improve the current situation towards an highly accurate Earth system observation.
URL:https://cesoc.net/event/glaser/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251103T101500
DTEND;TZID=Europe/Berlin:20251103T113000
DTSTAMP:20251022T061922Z
CREATED:20251022T061922Z
LAST-MODIFIED:20251022T061922Z
UID:8818-1762164900-1762169400@cesoc.net
SUMMARY:[DETECT] Alexander Graf - Reflect sunlight or use it to store carbon?
DESCRIPTION:CRC DETECT invites you to their Land & Climate Seminar featuring Alexander Graf\, who will be giving a talk with the title: \nReflect sunlight or use it to store carbon?\nDate & Time: 03.11.2025 at 10:15 (CST) \nMore information is available here: https://sfb1502.de
URL:https://cesoc.net/event/graf/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251023T160000
DTEND;TZID=Europe/Berlin:20251023T170000
DTSTAMP:20250910T101059Z
CREATED:20250910T101059Z
LAST-MODIFIED:20250910T101059Z
UID:8816-1761235200-1761238800@cesoc.net
SUMMARY:Katinka Bellomo - Impacts and State-Dependence of AMOC weakening in a warming climate
DESCRIPTION:CESOC kindly invites you to a talk given by Dr. Katinka Bellomo\, IPCC AR7 Lead Author & Associate Professor at the Department of Geosciences\, University of Padova\, with the title: \nImpacts and State-Dependence of AMOC weakening in a warming climate\nDate: 23 October 2025\,\nTime: 16:00 CEST\nLocation: University of Cologne \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nThe Atlantic Meridional Overturning Circulation (AMOC) is a global system of ocean currents culminating in the North Atlantic\, where ocean water deep convection facilitates the overturning circulation. Projections of future climate change simulated by models in the CMIP6 archive show good agreement on a weakening of AMOC strength. Nevertheless\, projected AMOC decline differs across models\, spanning a wide range of possible reduced AMOC strengths over the next few decades. In this seminar\, I will give an overview of this problem\, underscoring the implications of future projections and pointing out outstanding questions. In particular\, I will go over our recent results showing the role of this circulation on climate change impacts\, focusing on mechanisms that propagate slow oceanic circulation anomalies onto atmospheric circulation and translating into extreme events over the surrounding regions. \nBio: https://www.isac.cnr.it/sites/default/files/curricula/CV_20200819.pdf
URL:https://cesoc.net/event/bellomo/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,summer term 2025,Talk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251021T160000
DTEND;TZID=Europe/Berlin:20251021T170000
DTSTAMP:20250612T121831Z
CREATED:20250612T121831Z
LAST-MODIFIED:20250612T121831Z
UID:8809-1761062400-1761066000@cesoc.net
SUMMARY:Trude Storelvmo - Potential climate tipping point hiding in Southern Ocean Clouds
DESCRIPTION:CESOC kindly invites you to a talk given by Prof. Trude Storelvmo\, Section for Meteorology and Oceanography at the University of Oslo\, with the title: \nPotential climate tipping point hiding in Southern Ocean Clouds\nDate: 21 October 2025\nTime: 16:00 CEST\nLocation: University of Cologne \nPlease use the entrance at Höninger Weg 100\, 50969 Cologne. Ring the bell labeled “Hörsaal Universität Köln – Öffnungszeit 7–18 Uhr” to enter; the door will open automatically. The session takes place in Lecture Hall 4.001 on the 4th floor. \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net \n\nAbstract: \nThe Southern Ocean is known to be among the cloudiest places on Earth\, and the important contribution of Southern Ocean clouds to Earth’s energy budget is undisputed. By changing their composition in response to warming\, clouds in this region currently limit the rate of warming\, as they become brighter with increasing temperature and thus exert a stabilising feedback on the climate system. Here\, based on multiple lines of evidence\, we show that in the current state of the Southern Ocean\, this negative feedback happens to be maximised. Evidence based on radiative transfer calculations\, in situ measurements\, satellite remote sensing and Earth System Modelling all point in the same direction; we currently find ourselves in a climate state which allows Southern Ocean clouds to contribute maximally to climate stability. An important implication of this discovery is that the consequences of moving away from this climate state are wide-reaching\, as this would be expected to shift our climate into a state that reacts more strongly to any perturbation\, most notably that due to changes in atmospheric greenhouse gas concentrations. This adds urgency to effective climate mitigation implementation in order to limit warming and thus preserve the stabilising climate effect of Southern Ocean clouds. \nBio: https://www.mn.uio.no/geo/english/people/aca/metos/truds/
URL:https://cesoc.net/event/storelvmo/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,summer term 2025
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251013T101500
DTEND;TZID=Europe/Berlin:20251013T113000
DTSTAMP:20251006T104704Z
CREATED:20251006T104704Z
LAST-MODIFIED:20251006T104704Z
UID:8817-1760350500-1760355000@cesoc.net
SUMMARY:[DETECT] Shin-Chan Han - Alternative use of GRACE for examining rapid surface mass change including flood and flash drought
DESCRIPTION:CRC DETECT invites you to their Land & Climate Seminar featuring Shin-Chan Han\, who will be giving a talk with the title: \nAlternative use of GRACE for examining rapid surface mass change including flood and flash drought\nDate & Time: 13.10.2025 at 10:15 (CEST) \nMore information is available here: https://sfb1502.de/component/dpcalendar/event/233?calid=44
URL:https://cesoc.net/event/han/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251007T120000
DTEND;TZID=Europe/Berlin:20251010T130000
DTSTAMP:20250731T185806Z
CREATED:20250731T185806Z
LAST-MODIFIED:20250731T185806Z
UID:8811-1759838400-1760101200@cesoc.net
SUMMARY:Kick-off workshop AlgoEarth
DESCRIPTION:On 7-10 October 2025\, the kick-off workshop for the semester-long programme AlgoEarth will take place at the University of Cologne\, Germany. \nIn case\, the session takes place in Lecture Hall 4.001 on the 4th floor\, please use the entrance at Höninger Weg 100\, 50969 Cologne. Ring the bell labeled “Hörsaal Universität Köln – Öffnungszeit 7–18 Uhr” to enter; the door will open automatically. \nIn a changing climate\, vulnerability to severe weather events increases significantly. Next-generation observation techniques offer exciting insights\, but also pose new challenges in terms of large data volumes and information content. The main objective of this workshop is to bring together researchers from Computer Science (algorithm design\, machine learning) and Geosciences (earth observations) who are interested in interdisciplinary research on the algorithmic and machine learning challenges posed by new earth observation systems such as satellites\, etc. in order to exploit their full potential for earth system modelling and analysis\, in particular for weather and climate prediction. \nThe workshop will include \n\ninvited talks by leading experts\ncontributed talks\nposters\ndiscussions\n\nLocation: University of Cologne\, Institute of Geophysics and Meteorology\, Pohligstraße 3\, 50969 Cologne\, Lecture hall 4.001 \nCall for contributions: Want to contribute? We welcome abstract submissions for posters or short talks here. Please indicate whether you would prefer a poster or an oral presentation. We aim to offer an oral or poster presentation to all suitable applicants. Decisions will be made by the PIs of the AlgoEarth Semester based on the availability of slots\, the scientific relevance of the contribution to the event\, and its quality. Submission deadline for short talks is 31 July; decisions will be communicated by the end of August at the latest. The submission deadline for posters is 15 September; decisions will be communicated by 23 September at the latest.  \nPlease note that in order to submit an abstract or register for the event\, you have to create a free user account first. After creating your account\, you can submit an abstract\, register for the event\, or both.
URL:https://cesoc.net/event/kick-off-workshop-algoearth/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:Courses
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250909T150000
DTEND;TZID=Europe/Berlin:20250909T160000
DTSTAMP:20250804T131824Z
CREATED:20250804T131824Z
LAST-MODIFIED:20250804T131824Z
UID:8812-1757430000-1757433600@cesoc.net
SUMMARY:Samira Soltani - Integrated Advances in Hydrological Modeling: From Data Assimilation to River Parameterization
DESCRIPTION:CESOC kindly invites you to a talk given by Dr. Samira Soltani\, from the Institute for Bio- und Geosciences (IBG)\, Agrosphere (IBG-3)\, Forschungszentrum Jülich (FZJ)\, with the title: \nIntegrated Advances in Hydrological Modeling: From Data Assimilation to River Parameterization\nDate: 09 September 2025\,\nTime: 15:00 CEST\nLocation: Meeting room\, Nußallee 15\, IGG\, 53115 Bonn \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nThis talk presents recent advances in hydrological modeling through the integration of remote sensing\, data assimilation\, and physically-based simulation techniques. One area of focus involves the use of GRACE and SMOS satellite data within the fully coupled ParFlow-CLM model to enhance the estimation of soil moisture and groundwater levels. This approach offers deeper insight into terrestrial water storage across large spatial scales\, particularly relevant for long-term water balance studies.\nIn a separate effort targeting real-time applications\, high-resolution soil moisture data from Sentinel-1 and ESA CCI are assimilated using the ensemble Kalman filter. This technique significantly improves streamflow forecasts by better capturing the timing and magnitude of peak flows during extreme flood events\, providing a valuable tool for operational flood management.\nComplementing these developments is a novel subgrid-scale river parameterization method that refines flow dynamics by adjusting roughness coefficients based on river width and model resolution. This technique enhances the simulation of discharge\, particularly in regions with complex terrain.\nTogether\, these distinct advancements illustrate how the fusion of observational data with tailored modeling approaches can address diverse challenges in hydrology from understanding large-scale water storage dynamics to improving predictive capabilities for flood response. \nBio: \nSamira Sadat Soltani is a Hydrologist and Postdoctoral Researcher at Forschungszentrum Jülich\, Germany. She holds a dual Ph.D. in Water Resources Management and Earth Science from the University of Strasbourg (France) and Sharif University of Technology (Iran). Her expertise lies in integrated modeling\, data assimilation\, remote sensing\, and machine learning\, with a strong focus on sustainable water management\, flood forecasting\, and groundwater modeling.
URL:https://cesoc.net/event/soltani/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250903T101500
DTEND;TZID=Europe/Berlin:20250903T120000
DTSTAMP:20250821T143733Z
CREATED:20250821T143733Z
LAST-MODIFIED:20250821T143733Z
UID:8814-1756894500-1756900800@cesoc.net
SUMMARY:Dale Durran – Seasonal Sea Ice Forecasting with a Deep Learning Earth System Model
DESCRIPTION:CESOC kindly invites you to two talks given by: \nProf. Dr. Dale Durran\, a Principal Research Scientist (Climate) at NVIDIA\, a Professor of Atmospheric Sciences\, and Adjunct Professor of Applied Mathematics at the University of Washington\, with the title: \nSeasonal Sea Ice Forecasting with a Deep Learning Earth System Model\nNathaniel Cresswell-Clay\, a Ph.D. student in the Department of Atmospheric and Climate Sciences at the University of Washington and a National Defense Science and Engineering Graduate Fellow\, with the title \nDynamic Vegetation Modelling Learned from Satellite Observations\nDate: 03 September 2025\,\nTime: 10:15 CEST\nLocation: Jülich \nFor online participation\, please contact info@cesoc.net
URL:https://cesoc.net/event/durran/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250827
DTEND;VALUE=DATE:20250830
DTSTAMP:20250219T111726Z
CREATED:20250219T111726Z
LAST-MODIFIED:20250219T111726Z
UID:8796-1756252800-1756511999@cesoc.net
SUMMARY:Hackathon on Machine Learning for the Earth System
DESCRIPTION:[et_pb_section admin_label=\”section\”]\n			[et_pb_row admin_label=\”row\”]\n				[et_pb_column type=\”4_4\”][et_pb_text admin_label=\”Text\”]Join us for the Hackathon on Machine Learning for the Earth System – a hands-on event for PhD students and early-career researchers passionate about applying ML to weather and climate research! \n???? August 27–29\, 2025 \n???? Location: Computer Science Department\, University of Bonn\, Germany \nFor more information\, please visit: https://cesoc.net/hackathon-on-machine-learning-for-the-earth-system/[/et_pb_text][/et_pb_column]\n			[/et_pb_row]\n		[/et_pb_section]
URL:https://cesoc.net/event/hackathon-on-machine-learning-for-the-earth-system/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250825
DTEND;VALUE=DATE:20250828
DTSTAMP:20250219T111155Z
CREATED:20250219T111155Z
LAST-MODIFIED:20250219T111155Z
UID:8795-1756080000-1756339199@cesoc.net
SUMMARY:Workshop on Machine Learning for Earth System Modelling (MLESM)
DESCRIPTION:We are excited to announce the third workshop on ‘Machine Learning for Earth System Modelling’ (formally Large-Scale Deep Learning for the Earth System) that will take place again in Bonn\, Germany\, and online on \n???? August 25-27\, 2025\n???? Location: Bonn\, Germany \nFor more information\, please visit: https://cesoc.net/third-workshop-on-machine-learning-for-the-earth-system/ \n 
URL:https://cesoc.net/event/workshop-on-mlesm/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250724T140000
DTEND;TZID=Europe/Berlin:20250724T170000
DTSTAMP:20250617T112100Z
CREATED:20250617T112100Z
LAST-MODIFIED:20250617T112100Z
UID:8810-1753365600-1753376400@cesoc.net
SUMMARY:Harald Sodemann - Evaluating regional model biases in the European Arctic using paired stable water isotope observations
DESCRIPTION:CESOC kindly invites you to a talk given by Prof. Harald Sodemann\, Professor\, Meteorology (Numerical Modelling\, Atmospheric Water Cycle)\, at the University of Bergen and Mercator Fellow in the TR172  \”Arctic Amplification\” with the title: \nEvaluating regional model biases in the European Arctic using paired stable water isotope observations\nDate: 24 July 2025\,\nTime: 14:00 CEST\nLocation: University of Cologne \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net \n\nAbstract: \nSvalbard is located within the major entry pathway of relatively warm\, mid-latitude air masses into the polar region. The stable water isotope composition in atmospheric water vapour and precipitation is a sensitive indicator of the accumulated condensation history of air masses on their way into the Arctic. The progressive loss of heavy isotopes with precipitation results in the well-known latitude gradient of stable isotopes in precipitation. Here we evaluate how well a simulation with the isotope-enabled regional model COSMO-iso driven by ECHAM6 nudged to ERA5 reanalyses represents the increasing depletion with higher latitude measurement location. We thereby make use of a data set of time-resolved precipitation and vapour isotope measurements collected during the ISLAS campaigns from 2020 to 2022 using research aircraft and station measurements from Ny-Ålesund\, Longyearbyen\, Tromsø\, Andøya\, Bergen\, and Finse\, all located along the European entry pathway for mid-latitude air masses into the Arctic. Results show that the time variations are well represented at all three measurements sites. While the sub-Arctic and the mid-latitude sites show a small low-bias in the simulated isotope depletion for δ18O and δD in precipitation\, the indicator for non-equilibrium fractionation d-excess shows a high bias of more than 10 permil. Comparison with measurements taken on Svalbard during the ISLAS campaigns show a substantial increase in scatter with no consistent bias for δ18O and δD\, whereas the d-excess has a consistent low bias. Vapour measurements confirm the results the from precipitation comparison. An investigation of the thermodynamic environment within and below clouds from in-situ and remote sensing observations points to an important role of the saturation adjustment in the microphysics scheme that prevents highly ice super-saturated environments in clouds that are conducive to low values of the d-excess. The operational model AROME-Arctic allows for more wide-spread regions of ice super-saturation\, but does currently not include water isotopes. We conclude that paired precipitation-vapour water isotope measurements are a valuable diagnostic for model evaluation for mixed-phase cloud microphysics in the Arctic. \nBio: https://www4.uib.no/en/find-employees/Harald.Sodemann
URL:https://cesoc.net/event/sodemann/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium,summer term 2025
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250715T160000
DTEND;TZID=Europe/Berlin:20250715T170000
DTSTAMP:20250423T142120Z
CREATED:20250423T142120Z
LAST-MODIFIED:20250423T142120Z
UID:8802-1752595200-1752598800@cesoc.net
SUMMARY:Katrin Lonitz - Nearly 20 years of GNSS-RO data assimilation at ECMWF
DESCRIPTION:In cooperation with the Hans-Ertel-Zentrum (HErZ) CESOC kindly invites you to a talk given by Dr. Katrin Lonitz\, Scientist for Earth System Assimilation\, Actively Sensed Observations Meteorology and Air Quality Section at the European Centre for Medium-Range Weather Forecasts (ECMWF)\, with the title: \nNearly 20 years of GNSS-RO data assimilation at ECMWF\nDate: 15 July 2025\,\nTime: 16:00 CEST\nLocation: Lecture Hall 4.001 (4th floor)\, Höninger Weg 100\, 50969 Cologne \nFor online participation\, please contact info@cesoc.net\n————————————————————————————————-\nAbstract \nSince December 2006\, the European Centre for Medium-Range Weather Forecasts (ECMWF) has assimilated Global Navigation Satellite System Radio Occultation (GNSS-RO) data into its operational forecasting system. GNSS-RO data provides high-vertical-resolution measurements sensitive to pressure\, temperature and humidity\, with particularly high accuracy in the upper troposphere and lower stratosphere.\nIn this talk\, I review the evolution of GNSS-RO data assimilation at ECMWF\, from initial implementation to its current use of data from multiple satellite constellations including those operated by commercial providers. Key milestones are highlighted\, along with advances in data usage and assimilation techniques\, impacts on forecast skill\, and the role of GNSS-RO in supporting climate reanalyses and long-term monitoring. \nBio: https://www.ecmwf.int/en/about/who-we-are/staff-profiles/katrin-lonitz
URL:https://cesoc.net/event/katrin-lonitz/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250703T130000
DTEND;TZID=Europe/Berlin:20250703T170000
DTSTAMP:20250521T084841Z
CREATED:20250521T084841Z
LAST-MODIFIED:20250521T084841Z
UID:8805-1751547600-1751562000@cesoc.net
SUMMARY:CESOC Third Annual Members\' Assembly
DESCRIPTION:CESOC invites the members and our network to the third annual Members\’ Assembly \nDate: Thursday\, July 3\, 2025\nTime: Starting at 13:00 CEST\nLocation: Bonn \nRegister here: https://eu.jotform.com/251393387630360
URL:https://cesoc.net/event/cesoc-third-annual-members-assembly/
CATEGORIES:CESOC Members’ Assembly
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250701T160000
DTEND;TZID=Europe/Berlin:20250701T170000
DTSTAMP:20250610T154626Z
CREATED:20250610T154626Z
LAST-MODIFIED:20250610T154626Z
UID:8807-1751385600-1751389200@cesoc.net
SUMMARY:Berit Czock & Julian Keutz (EWI) - Weather in Energy System Modelling
DESCRIPTION:[et_pb_section admin_label=\”section\”]\n			[et_pb_row admin_label=\”row\”]\n				[et_pb_column type=\”4_4\”][et_pb_text admin_label=\”Text\”]CESOC kindly invites you to a talk given by Berit Czock and Julian Keutz from the Energiewirtschaftliches Institut at the University of Cologne with the title: \nWeather in Energy System Modelling\nDate: 01 July 2025\,\nTime: 16:00 CEST\nLocation: Lecture Hall 4.001\, Pohligstr. 3\, University of Cologne \nhttps://www.hans-ertel-zentrum.de/en/news/20250221_SeminarReihe_SoSe.html \nIt will also be streamed via zoom: https://uni-koeln.zoom.us/j/98027972934?pwd=M2t3RHoxVEJWbFBBenNxZnpWdGVMQT09 \nMeeting-ID: 980 2797 2934 \nPassword: 456456 \nFor online participation\, please contact info@cesoc.net \n\nAbstract: \nThis presentation offers a practical research example on the integration of meteorological data in energy system analysis\, with a focus on electricity supply security in Germany. Using the EWI energy system model\, the presented study investigates how weather-driven variables influence the reliability of the power supply\, particularly during extreme weather events. By demonstrating the impact of meteorological factors on energy systems\, the research illustrates the importance of accurate weather and climate data in modelling energy systems. \nBio: \nBerit Hanna Czock is a Project Lead at EWI and a doctoral candidate at the University of Cologne. Her research focusses on electricity market modelling and design. In consulting projects for clients from the industry and public sectors\, she has analyzed\, for example\, how Germany could become climate neutral by 2045. She has advised\, among others\, the German Energy Agency (dena) as well as different DSOs and TSOs. From 2021 to 2023\, Berit Hanna Czock joined the Cologne-Bonn “Climate Monitoring and Diagnostics” group at the Hans-Ertel-Centre for Weather Research (HErZ) of the Deutscher Wetterdienst as a doctoral researcher. At HErZ she conducts research on security of supply and the impact of extreme weather in electricity systems with high shares of renewables. Before joining EWI\, Berit Hanna Czock studied Sustainable Energy Science at Reykjavik University (Reykjavik\, Iceland) and Economics at the University of Cologne.[/et_pb_text][/et_pb_column]\n			[/et_pb_row]\n		[/et_pb_section]
URL:https://cesoc.net/event/czockkeutz/
CATEGORIES:CESOC seminar series "my research",summer term 2025,Talk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250626T161500
DTEND;TZID=Europe/Berlin:20250626T173000
DTSTAMP:20250611T084017Z
CREATED:20250611T084017Z
LAST-MODIFIED:20250611T084017Z
UID:8808-1750954500-1750959000@cesoc.net
SUMMARY:CRC-DETECT: Hydrobiogeochemistry of terrestrial-aquatic interfaces from pore to continental scales
DESCRIPTION:CRC-DETECT is hosting one event of the 2025 Birdsall-Dreiss Distinguished Lecture Series\, presented by the Geological Society of America (GSA)\, and would like to invite you to a lecture giving by Professor M. Bayani Cardenas from the University of Texas at Austin. \n“Hydrobiogeochemistry of terrestrial-aquatic interfaces from pore to continental scales” \nDate:         26 June 2025\, 16:15-17:30\nLocation:   University of Bonn\, Lecture Hall XVI\, Nussallee 17\, Bonn \nPlease find more info on the lecture here.
URL:https://cesoc.net/event/cardenas/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250617T160000
DTEND;TZID=Europe/Berlin:20250617T170000
DTSTAMP:20250425T105727Z
CREATED:20250425T105727Z
LAST-MODIFIED:20250425T105727Z
UID:8804-1750176000-1750179600@cesoc.net
SUMMARY:Lars Hoffmann - MPTRAC in Action: A Lagrangian Approach to Atmospheric Transport Modeling and Analysis
DESCRIPTION:CESOC kindly invites you to a talk given by Dr. Lars Hoffmann\, Head of division HPC in Applied Sciences and Engineering\,Institute for Advanced Simulation (IAS)\, Jülich Supercomputing Centre (JSC)\, Forschungszentrum Jülich (FZJ) with the title: \nMPTRAC in Action: A Lagrangian Approach to Atmospheric Transport Modeling and Analysis\nDate: 17 June 2025\,\nTime: 16:00 CEST\nLocation: University of Bonn \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net \n\nAbstract: \nLagrangian particle dispersion models are indispensable tools for understanding atmospheric transport processes across multiple scales. This presentation introduces MPTRAC (Massive-Parallel Trajectory Calculations)\, a high-performance\, massively parallel Lagrangian model developed at the Jülich Supercomputing Centre for simulating tracer transport and dispersion in the free troposphere and stratosphere. After a brief overview of MPTRAC’s scientific scope and technical features\, I will highlight three key application areas. First\, I will present a model evaluation based on superpressure balloon observations\, demonstrating MPTRAC’s performance under real atmospheric conditions. Second\, I will discuss the use of advanced meteorological reanalyses\, such as ERA5\, emphasizing both the opportunities and challenges they present for Lagrangian modeling. Third\, I will explore case studies of volcanic eruptions\, in which MPTRAC has been employed to estimate volcanic emissions and simulate the long-range transport and dispersion of volcanic plumes. I will conclude by summarizing key findings and outlining future directions for MPTRAC\, including planned enhancements and potential new research avenues that leverage advances in atmospheric science and high-performance computing. \nBio: \nLars Hoffmann received his PhD in physics from the University of Wuppertal\, Germany\, in 2006. In 2007\, he was a visiting scientist at NorthWest Research Associates and a research fellow at the University of Colorado\, USA. From 2008 to 2010\, he worked as a postdoctoral researcher at the Institute of Energy and Climate Research at Forschungszentrum Jülich. \nIn 2011\, he became team leader of the Simulation Laboratory Climate Science at the Jülich Supercomputing Centre (JSC)\, a position he held until 2021. Since 2022\, he has been head of the Computational Science Division at JSC. In the same year\, he was appointed co-chair of the Joint Lab Exascale Earth System Modelling of the Helmholtz Association (HGF)\, a collaborative initiative dedicated to advancing exascale computing for Earth system research. \nHis research centers on high-performance computing and computational science applied to atmospheric modeling. This work involves developing and implementing scalable numerical methods to simulate atmospheric processes accurately\, as well as leveraging advanced scalable computing technologies to enable large-scale scientific simulations.
URL:https://cesoc.net/event/hoffmann/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250610T110000
DTEND;TZID=Europe/Berlin:20250610T123000
DTSTAMP:20250603T082512Z
CREATED:20250603T082512Z
LAST-MODIFIED:20250603T082512Z
UID:8806-1749553200-1749558600@cesoc.net
SUMMARY:Claire Pettersen – Observing and Characterizing High-Latitude Precipitation Processes: Perspectives from Space and Ground
DESCRIPTION:CESOC kindly invites you to a talk given by Prof Claire Pettersen\, from the University of Michigan\, with the title: \nObserving and Characterizing High-Latitude Precipitation Processes: Perspectives from Space and Ground\nDate: 10 June 2025\,\nTime: 11:00 CEST\nLocation: Höninger Weg 100\, 50969 Cologne \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net\n————————————————————————————————-\nAbstract \nHigh-latitude precipitation has widespread impacts on communities through regional ecology\, hydrological planning\, and socioeconomic effects. Accurate forecasts or projections of precipitation accumulation in numerical weather prediction or climate models are challenging due to uncertainties in parameterizations of cloud and precipitation processes. In this presentation\, I feature recent findings from regime-based studies leveraging precipitation observations from both spaceborne platforms and ground-based instrument suites in high-latitude regions. Multi-instrument observations of clouds and precipitation can help better constrain processes in models and refine retrieval assumptions\, leading to more accurate quantification of accumulation. I will highlight the advantage of long-term observations to examine key physical and dynamical precipitation processes through the lens of regime partitioning. Regimes are determined through distinct large-scale environmental conditions and precipitation properties and processes are investigated using remotely-sensed observations. Key findings demonstrate that regime-dependent characteristics show differences in precipitation frequency and location of occurrence\, intensity\, phase\, and microphysical properties. Precipitation regimes are linked to significant seasonal and subseasonal\, synoptic\, and thermodynamic conditions such as atmospheric blocking\, poleward moisture transport (e.g.\, atmospheric rivers)\, and cold-air outbreaks. \nBio: https://clasp.engin.umich.edu/people/pettersen-claire/
URL:https://cesoc.net/event/pettersen/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
CATEGORIES:CESOC Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250527T150000
DTEND;TZID=Europe/Berlin:20250527T160000
DTSTAMP:20250221T104553Z
CREATED:20250221T104553Z
LAST-MODIFIED:20250221T104553Z
UID:8797-1748358000-1748361600@cesoc.net
SUMMARY:Annika Oertel - The ‘Swabian MOSES 2023’ Field Campaign
DESCRIPTION:CESOC kindly invites you to a joint CESOC-HeRZ Colloquium given by Dr. Annika Oertel\, who leads a junior research group within IDEA Science for Service\, and from the Institute of Meteorology and Climate Research at Karlsruhe Institute of Technology (KIT) with the title:  \nThe ‘Swabian MOSES 2023’ field campaign\nThe added value of campaign observations for model validation and data assimilation \nDate: Tuesday 27 May 2025\,\nTime: 15:00 CEST\nLocation: Lecture Hall 4.001 (4th floor)\, Höninger Weg 100\, 50969 Cologne \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net\n————————————————————————————————-\nAbstract \nSummertime convective events and their associated hazards can pose considerable threats to people and property. To-date\, forecasting convective events remains a challenge\, even for the latest generation of convective-scale numerical weather prediction models. Forecasting these small-scale events is\, among others\, challenged by the presence of bias and errors in operational analysis data\, which are used as initial conditions for subsequent forecasts.\nWe leverage observations from the ‘Swabian MOSES’ 2023 field campaign that took place in summer 2023 in the Black Forest region\, Southern Germany\, to (i) validate analysis data sets at different scales and (ii) to improve a convective-scale analysis by additionally assimilating campaign observations.\nDuring the campaign\, the mobile atmospheric measurement platform\, KITcube\, was deployed. The measurements include a spatially distributed network of instruments to observe the dynamic and thermodynamic characteristics of the lower troposphere\, and in particular a network of several Doppler wind lidars. Here\, we will focus on the model representation of mesoscale flow characteristics using 3-months of continuous measurements and show how the assimilation of Doppler wind lidar retrievals using the non-hydrostatic model ICON and the Kilometer Scale Ensemble Data Assimilation system (KENDA) influences the analysis. \nLink to SWM 2023 campaign: https://www.atmohub.kit.edu/english/590.php \nSpeaker bio \nAnnika Oertel is the Leader of the Young Investigator Group *Mesoscale Processes and Predictability* at the Institute of Meteorology and Climate Research\, Karlsruhe Institute of Technology (KIT)\, Germany\, since 2023. Her research is embedded in the IDEA-S4S network\, focusing on improving weather predictability at mesoscale levels. \nPreviously\, she was a postdoctoral researcher (2020-2023) in the *Cloud Physics* and *Large-scale Dynamics and Predictability* groups at KIT\, contributing to the transregional research center *Waves to Weather*. She earned her doctorate in Atmospheric Dynamics from ETH Zurich (2016-2019)\, where she investigated complex atmospheric processes shaping weather patterns.
URL:https://cesoc.net/event/oretel/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250523T100000
DTEND;TZID=Europe/Berlin:20250523T110000
DTSTAMP:20250307T110648Z
CREATED:20250307T110648Z
LAST-MODIFIED:20250307T110648Z
UID:8799-1747994400-1747998000@cesoc.net
SUMMARY:Jordi Vila-Guerau - Investigations on the relations between photosynthesis and clouds at the Amazon basin
DESCRIPTION:CESOC kindly invites you to a Colloquium given by Prof. Dr. Jordi Vila-Guerau de Arellano\, a Professor and Chairholder at Meteorology and Air Quality Group\, Wageningen University & Research with the title: \nInvestigations on the relations between photosynthesis and clouds at the Amazon basin\nDate: 23 May 2025\,\nTime: 10:00 CEST\nLocation: Lecture Hall 4.001 (4th floor)\, Höninger Weg 100\, 50969 Cologne \nFor online participation\, please contact: info[@]cesoc.net \n\nAbstract:\nHow are rainforest photosynthesis and turbulent fluxes influenced by clouds? To what extent are clouds affected by local processes driven by rainforest energy\, water and carbon fluxes? These interrelated questions were the main drivers of the intensive field experiment CloudRoots-Amazon22 which took place at the ATTO/Campina supersites in the Amazon rainforest during the dry season\, in August 2022. CloudRoots-Amazon22 collected observational data to derive causal-effect relationships between processes occurring at the leaf-level up to canopy scales in relation to the diurnal evolution of the clear-to-cloudy transition. First\, we studied the impact of cloud and canopy radiation perturbations on the sub-diurnal variability of stomatal aperture. We found an asymmetry modulated by clouds that favors photosynthesis in the morning. Second\, we combined 1 Hz-frequency measurements of the stable isotopologues of carbon dioxide and water vapor with measurements of turbulence to determine carbon dioxide and water vapor sources and sinks within the canopy. Using scintillometer observations\, we inferred 1-minute sensible heat flux that responded within minutes to the cloud passages. Third\, collocated profiles of state variables and greenhouse gases enabled us to determine the role of clouds in vertical transport. We then inferred the area fraction of cloud cover and cloud mass flux to probe the need of collecting a comprehensive data set to establish causality between canopy and cloud processes and improve the representations in weather and climate models. These studies will be used to constrain numerical experiments carried out with large-eddy simulations to compare present and future scenarios influenced by warming and enhance carbon dioxide concentrations. Our findings contribute to advance our process knowledge of the coupling between cloudy boundary layers and primary carbon productivity of the Amazon rainfores
URL:https://cesoc.net/event/jordi-vila-guerau/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250519T163000
DTEND;TZID=Europe/Berlin:20250519T180000
DTSTAMP:20250424T221656Z
CREATED:20250424T221656Z
LAST-MODIFIED:20250424T221656Z
UID:8803-1747672200-1747677600@cesoc.net
SUMMARY:Eva Pfannerstill - Emissions in transition: Tracing air quality-climate links from cities to forests
DESCRIPTION:CESOC cordially invites you to the inaugural lecture of Professor Eva Pfannerstill from the Institute of Geophysics and Meteorology\, titled: \nEmissions in transition: Tracing air quality-climate links from cities to forests\nDate: 19 May 2025\nTime: 16:30 CEST\nLocation: Lecture Hall 4.001 (4th floor)\, Höninger Weg 100\, 50969 Cologne \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net\n————————————————————————————————-\nAbstract \nThousands of organic gases are released into the atmosphere from both human activities and natural sources. These emissions fuel complex chemical reactions that influence air quality and climate. As societies transition to cleaner energy and ecosystems respond to climate stress\, the composition and sources of these emissions are shifting. This lecture will explore how airborne measurements offer powerful tools to track these emissions – from cities to stressed forests – and how they can also uncover disparities in air pollution experienced by different demographic and socio-economic groups. \nBio \nEva Pfannerstill started her Helmholtz Investigator Group at Forschungszentrum Jülich (Institute of Climate and Energy Systems 3: Troposphere) in October 2024. She received her doctorate in atmospheric chemistry from the Max Planck Institute for Chemistry in Mainz\, investigating atmospheric reactivity in the Amazon forest and in the Middle East. She performed her first airborne flux measurements as a postdoctoral fellow at University of California\, Berkeley. She is passionate about science outreach and also is a co-coordinator of the GEIA (Global Emissions Initiative) VOC Working Group.
URL:https://cesoc.net/event/eva-pfannerstill2/
LOCATION:Lecture Hall 4.001 (4th floor) via Höninger Weg 100\, 50969 Cologne\, Pohligstr. 3\, Cologne\, 50969\, Germany
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DTSTART;TZID=Europe/Berlin:20250509T100000
DTEND;TZID=Europe/Berlin:20250509T140000
DTSTAMP:20250305T101750Z
CREATED:20250305T101750Z
LAST-MODIFIED:20250305T101750Z
UID:8798-1746784800-1746799200@cesoc.net
SUMMARY:CESOC “Machine Learning for the Earth System” Working Group - Inaugural meeting
DESCRIPTION:We are excited to invite you to our hybrid kick-off event of the CESOC \”Machine Learning for the Earth System\” Working Group\n???? Date & Time: Friday\, May 9th\, from 10:00 to 14:00 CEST\n???? Location: at Hörsaal 4.001\, Department of Meteorology\, University of Cologne (Pohligstr. 3\, 50969 Köln\, Germany).\n \nWith a focus on shaping the future of our working group\, join us for talks and posters on the latest advances in ML for Earth system science. We’ll explore how ML can enhance forecasting while ensuring physical consistency\, uncertainty quantification\, and operational feasibility. Discussions will cover scalable\, physics-informed models\, real-world integration\, and collaborative opportunities. \n\nRegistration is now Open\nhttps://form.jotform.com/250544048924357\nPlease make sure to register by March 21st
URL:https://cesoc.net/event/cesoc-mlesm-working-group/
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DTSTART;TZID=Europe/Berlin:20250430T150000
DTEND;TZID=Europe/Berlin:20250430T160000
DTSTAMP:20250214T134655Z
CREATED:20250214T134655Z
LAST-MODIFIED:20250214T134655Z
UID:8794-1746025200-1746028800@cesoc.net
SUMMARY:Peter Braesicke - Challenges and Opportunities of Seamless Earth System Modelling
DESCRIPTION:CESOC kindly invites you to a Colloquium given by Prof. Dr. Peter Braesicke\, Head of Research and Development at the German Weather Service (DWD) with the title:  \nChallenges and Opportunities of Seamless Earth System Modelling \nA perspective based on the ICON modelling system \n  \nDate: 30 April 2025\,\nTime: 15:00 CEST\nLocation: Lecture Hall 4.001 (4th floor)\, Höninger Weg 100\, 50969 Cologne \nIt will also be streamed via zoom:\nfor online participation\, please contact info@cesoc.net\n————————————————————————————————-\nAbstract \nSeamless Earth System (ES) modelling bridges spatial and temporal gaps. From an atmospheric perspective\, this includes a full arc from past and recent weather and climate monitoring – towards future weather extremes in a changing climate under increasing greenhouse gases. To allow complex and comprehensive investigations of such weather-climate interplays\, centrally including atmospheric composition\, the modelling landscape had to change dramatically in the last few years. Here\, I will review the current status of weather forecasting and climate modelling with the ICON modelling framework. In addition\, I will explore relations with data driven methods and how models based on partial differential equations (here ICON) together with data driven models will help us to advance seamless ES modelling in the coming years – providing even better weather forecasts and climate projections to inform society.
URL:https://cesoc.net/event/braesicke/
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