Upcoming Events


Special Seminar Series: Greenhouse gases fluxes and sinks

Heinrich Bovensmann

June 25, 2015, 16:00

ETH Zurich, CHN L17.1


14th international Swiss Climate Summer School: "Extreme events and climate"

Aug. 23-28, 2015

Ascona, Switzerland

Application deadline:

Dec. 31, 2014


Past issues »

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Past Events

Special Seminar Series: Greenhouse gases fluxes and sinks

Ben Poulter

March 17, 2015, 9:30

ETH Zurich, CHN L17.1


C2SM-meeting: Climate data management and handling - a technical exchange

March 2, 2015, 13:00-17:00

ETH Zürich

CHN P 12

Registration deadline: February 20, 2015


COSMO User Workshop

December 3, 2014
10:15 - 18:00





C2SM Community Day

November 19, 2014

13:30 - 17:00

Apéro from 17:00 on.

ETH Zürich, CHN C14

more »


Klimarunde 2014

November 5, 2014
15.30 - 19.00

ETH Zurich, Main Building


C2SM Workshop: Scientific Programming in Python

Sept. 11, 2014

more »


The Latsis Symposium 2014

June 18-21, 2014

ETH Zurich

more »


Workshop: Regional climate model data for Alpine impact research

June 4-6, 2014

ETH Zurich

Application deadline: March 31, 2014

more »

COSMO User Workshop

Wednesday, November 27, 2013


more »

C2SM Technical Training: Good practices in code development

Thursday, October 31, 2013, 10:15-12:00

ETH Zurich, CHN P12 room

more »

ETH Klimarunde 2013: Welche Schlüsse ziehen wir aus dem neusten UNO-Klimabericht 2013?

Thursday, October 3, 2013, 15:30-17:00

ETH Zurich, Main building

more »

C2SM Symposium on

The Water Cycle in a Changing Climate

July 1-2, 2013

ETH Zurich.

more »

C2SM Community day

June 12, 2013 - 13:15


more »

Workshop: Regional climate model data for climate impact research

4th to 6th February 2013

Have a look at the workshop webpage to download the presentations and material used in the hands-on sessions.

Welcome to the Center for Climate Systems Modeling (C2SM). C2SM is a research center based at ETH Zurich. It is a joint initiative between ETH Zurich, MeteoSwiss, Empa, WSL, and Agroscope with the main objective to improve the understanding of the Earth’s climate system, and our capability to predict weather and climate.



Changes in heavy summertime precipitation in a changing climate

12 February 2015 - Using the COSMO model in a convection resolving configuration (horizontal grid spacing of 2.2 km), Nikolina Ban and colleagues have found that projected increases in both extreme daily and hourly summer precipitation in summertime over continental Europe follow theoretical expectations from the Clausius-Clapeyron relation. These results are in contrast to previous studies that predicted an increase of extreme hourly precipitation faster than expected from the Clausius-Clapeyron relation. Ban, N., et al. (2015): Geophysical Research Letters, doi:10.1002/2014GL062588 For more details: see the CSCS highlight

New staff at C2SM

5 February 2015 - Dr. Katherine Silverthorne Osterried has joined C2SM in February. As the successor of Anne Roche, she will lead the C2SM activities related to regional climate modeling. Katherine holds a bachelor's degree in mathematics and received a PhD in Geophysical Fluid Dynamics from MIT in 2010. She then joined Queen’s University in Belfast, where she developed and implemented numerical methods that extend the well known TELEMAC suite of CFD solvers, and collected experience in software development and user-support. We wish Katherine a warm welcome!

Atmospheric circulation drives increases of Antarctic ice in a warming world

16 December 2014 - Antarctic sea-ice cover has increased over the past few decades. C2SM community member Alexander Haumann led a team of scientists that explained the underlying cause and analyzed why climate models fail to reproduce it. The authors found that winds blowing more strongly away from the Antarctic continent were the driver of increasing ice cover. Consequently the ice is further blown to the north and the ocean refreezes in the south. However climate models do not fully reproduce this effect. Haumann and colleagues argue that the model they used in their study does not capture the influence of the smaller scale topography around the continent and surface processes over ice and snow accurately enough. These processes influence the surface-pressure distribution and hence the direction of the wind. Thus, once the model shows a more realistic atmospheric circulation in Antarctica, the simulations of the sea-ice trends will likely improve.

Global consequences of local nitrogen emissions

28 November 2014 - Nitrogen concentrations have increased markedly in surface waters across the North Pacific Ocean for the past decades. C2SM member Nicolas Gruber was part of a team of researcher that reconstructed these changes. The trend could enhance microbial growth in the ocean and eventually increase production of the greenhouse gas nitrous oxide (N2O). Read more in ETH-News (in German).

PASC14 visualization award for COSMO-1 animation

23 September 2014 - A collaborative effort between C2SM associated scientists at ETHZ (Oliver Stebler, Urs Beyerle and Reto Knutti) and at MeteoSwiss (Oliver Fuhrer and Reto Stöckli) has resulted in a very impressive visualization of a high-resolution (1.1 km, 2 min) simulation produced by the experimental weather model COSMO-1 that is currently developed at MeteoSwiss. This visualization was nominated as the second best visualization presented at the recent The Platform for Advanced Scientific Computing (PASC) Conference.

"Natural variability, radiative forcing and climate response in the recent hiatus reconciled"

18 August 2014 - There is little evidence for a systematic overestimation of the temperature response to increasing atmospheric CO2 concentrations in a large number of climate models (CMIP5 ensemble). This conclusion by Markus Huber and and C2SM member Reto Knutti was published in recent study in "Nature Geoscience" that looked for explanations why global mean surface warming over the past 15 years has been less than in earlier decades and than simulated by most climate models. The authors found that internal variability (El Niño/Southern Oscillation, ENSO) and updated solar and stratospheric aerosol forcings from observations can explain the cooling. An adjusted climate model of reduced complexity was shown to be consistent with the temperature record of the past 15 years. Read the complete study here and see the article in ETH-News (in German).

C2SM members participate in two new Sinergia projects

24 July 2014 - Two Sinergia projects funded by the Swiss National Science Foundation were recently awarded to teams that include members of C2SM including Ulrike Lohmann , Christoph Schär and Heini Wernli. The goal of the project „Cloud-resolving climate modeling on future supercomputing platforms” (crClim) is to develop and exploit a European-scale climate model that is capable to resolve convection at a grid-spacing of 2 km. This endeavor needs close collaboration between atmospheric, climate and computer sciences from ETH, MeteoSwiss and the Swiss National Super Computing Center CSCS. The project “Paleo Fires” has the overall objective to advance the understanding of linkages between climate, land use, fire and vegetation. Participants from ETH IAC, PSI and the University of Berne want to focus on different regions over the most recent period of the last 150 years in comparison to the previous 2000 years.


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