Atmospheric Circulation (Schemm)
Overview and News
The Atmospheric Circulation group, led by Prof. Sebastian Schemm, has its research focus on weather and climate dynamics, high-resolution atmospheric modeling. This is done by modeling at different complexity, the use of observations, machine learning techniques and theory and the development of diagnostic tools in particular online diagnostics for high-resolution weather and climate models. More details can be found on the research page.
- The call_made took place 2022 storm track workshopon Oléron Island, France (29 May to 3 June 2022). We presented our work on idealized call_made. storm tracks in future climates
- A newly call_made funded research project (2022–2025) will allow us to investigate how storm tracks will change in high-resolution simulations of future climates. SNSFcall_made will join us as a postdoc on this project. Alejandro Hermoso
- Together with the Swiss Data Science Center (call_made), we explore how to use machine learning to accelerated SDSChigh-resolution weather and climate models and subgrid-scale physics [Project page].
- Stefan Rüdisühli and Katherine Osterrried (C2SM) participated in the call_made [September 2020]. A short article about how the event unfolded: CSCS/NVIDIA GPU Hackathon"Following the air on GPUs".
- The call_made has launched an international not-for-profit scientific journal EGUcall_made and Weather and Climate DynamicsSebastian Schemm serves as Co-Editor of this open-access journal, which is dedicated to the publication and public discussion of high-quality research on dynamical processes in the atmosphere [August 2019].
- In June 2022 the D-USYS conference took place in Davos, with a contribution on Data Assimilation by our group.
- Research and family combined [ETH News Item, August 2020]
- Our group is an associated member of the ETH AI center, which offers Ph.D. and postdoc fellowships. Get in contact with us if you consider applying. [ETH AI center, December 2020]
- At the interface between weather and climate [USYS News Item, March 2020]
- European Meteorological Society Young Scientist Award awarded to Sebastian Schemm [USYS News Item, call_made, June 2019] EMS News
New publications from the group
- Weather and Climate Dynamics: For the North Atlantic storm track, Coupled Model Intercomparison Project (CMIP) data indicate a tripole pattern of change under the RCP8.5 scenario. In this study, we reproduce the patterns by introducing local asymmetry in a zonally symmetric ICON aquaplanet simulation and examine the response of storm tracks to global warming downstream of the SST asymmetry. We find that regionally baroclinic conversion has the largest impact, while diabatic processes are of first order importance on the global scale. The lifetime of cyclones is decreasing and so are their numbers, but the most intense cyclones are becoming more intense. The study appears in call_made [May 2022] EGU's Weather and Climate Dynamics.
- [Featured Article] Cloud-circulation interactions: Clouds are not passively moved in the atmosphere by the wind. Instead, clouds actively influence the flow field in their immediate vicinity. In this study, the flow field generated by clouds is quantified. It is shown that clouds create a flow that is directed against the direction of the wind in which they grow. Hence, clouds propagate more slowly than a passive object, and they are more stationary. This can influence the regional cloud and precipitation distribution. In this article call_made, published in the Quarterly Journal of the Royal Meteorological Societywe outline how to quantify the circulation influence of clouds.[February 2021] [call_made] Wiley Twitter
- Storm track dynamics: The midwinter suppression of the North Pacific storm track intensity is a long-standing research question. In our new study, we quantify how the character of cyclones that exhibit a midwinter suppression changes during their life cycle. The full article is openly available at Weather and Climate Dyanmics: call_madeThe storm-track suppression over the western North Pacific from a cyclone life-cycle perspective [January 2021].
- Promet: Promet, the call_made's meteorological education journal, which has been published since 1971, appears twice a year and we contributed with an article on the life cycle of extratropical cyclones in issue 108. DWDcall_made [DE], Full journal available at Summarycall_made [December 2020] DWD Shop
- Trough and ridge detection: In a recent publication, we introduce a method to identify and track the life cycle of upper-level troughs and ridges. Read more at Weather and Climate Dyanmics: call_made [September 2020]. The life cycle of upper-level troughs and ridges: a novel detection method, climatologies and Lagrangian characteristics