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个人简介
My main research interests in energy meteorology are:
Physical processes generating strong winds, e.g., desert-dust storms driven by nocturnal lowlevel jets, extra-tropical cyclones or convectively generated cold pools
Aerosol effects on radiation and clouds including radiative forcing calculations for a better understanding of climate change
Supply of rain water coupled to the spatio-temporal variability of clouds
I work with numerical modelling of the regional and global climate of Earth, theoretical tools to construct simple models and to understand complex models of the Earth system, as well as groundbased and space-borne observations. Additionally, I gained experience with own measurements, e.g., during ocean expeditions with research vessels.
I give an impression of my work with three lines of research activities in the following.
Anthropogenic aerosols
The magnitude of the radiative forcing of anthropogenic aerosols remains one of the key uncertainties in our understanding of climate change. To better understand the climate model spread in aerosol radiative forcing, I have developed the simple plumes parameterisation MACv2.0- SP for optical properties of anthropogenic aerosol and an associated effect on clouds. The code is currently used in climate models to perform simulations for the “Radiative Forcing Model Inter-comparison Project” (RFMIP) endorsed by CMIP6. I am leading the coordinated RFMIP study on the aerosol radiative forcing with MACv2-SP (RFMIP-SpAer).
The code of MACv2-SP and the historical data is available as supplement of our GMD article (Stevens et al. 2017) or via input4MIPs. We published the future scenarios for MACv2-SP based on CMIP6 emission data in the supplement of our more recent article (Fiedler et al., 2019).
Contact me, if you would like to be involved in it.
Desert-dust storms
Natural dust aerosols contribute most to the aerosol mass on Earth. Dust aerosols are often emitted in North Africa, but both weather forecasts and climate models are known to have a large spread in dust-emission amounts. To aid model development, I have compiled benchmark climatologies from re-analysis data for different dust-emitting processes in North Africa, e.g., nocturnal low-level jets, mobile cyclones and the post-frontal strengthening of trade winds. Estimates of dust emission amounts associated with these processes have been helpful in evaluating weather and climate models at a process level, e.g., a CMIP5 model. Find out more in my publications.
Ocean expeditions
Desert-dust aerosols are emitted in regions where the observational network is sparse. To help getting more observations, I worked on research vessels to collect atmospheric reference data over oceans. In 2017, I have led an own multi-disciplinary expedition to the North Atlantic with RV Maria S. Merian and observed a continental-scale dust outbreak, currently published in the expedition book in the series "Reports on Earth System Science“ at the Max-Planck-Institute for Meteorology. I talked about our experiences in online blogs for MPI-M, and participated in other outreach projects for inspiring the next generation of scientists.
Current Projects and Collaborations
Research area director of „Climate modelling and diagnostics“ of the Hans-Ertel-Centre for Weather Research (HErZ), phase III
Chief Energy Meteorologist at the Institute of Energy Economics (EWI) at the University of Cologne
Leader of coordinated study with MACv2-SP parameterisation for the Radiative Forcing Model Inter-comparison Project (RFMIP) endorsed by CMIP6
Physical processes generating strong winds, e.g., desert-dust storms driven by nocturnal lowlevel jets, extra-tropical cyclones or convectively generated cold pools
Aerosol effects on radiation and clouds including radiative forcing calculations for a better understanding of climate change
Supply of rain water coupled to the spatio-temporal variability of clouds
I work with numerical modelling of the regional and global climate of Earth, theoretical tools to construct simple models and to understand complex models of the Earth system, as well as groundbased and space-borne observations. Additionally, I gained experience with own measurements, e.g., during ocean expeditions with research vessels.
I give an impression of my work with three lines of research activities in the following.
Anthropogenic aerosols
The magnitude of the radiative forcing of anthropogenic aerosols remains one of the key uncertainties in our understanding of climate change. To better understand the climate model spread in aerosol radiative forcing, I have developed the simple plumes parameterisation MACv2.0- SP for optical properties of anthropogenic aerosol and an associated effect on clouds. The code is currently used in climate models to perform simulations for the “Radiative Forcing Model Inter-comparison Project” (RFMIP) endorsed by CMIP6. I am leading the coordinated RFMIP study on the aerosol radiative forcing with MACv2-SP (RFMIP-SpAer).
The code of MACv2-SP and the historical data is available as supplement of our GMD article (Stevens et al. 2017) or via input4MIPs. We published the future scenarios for MACv2-SP based on CMIP6 emission data in the supplement of our more recent article (Fiedler et al., 2019).
Contact me, if you would like to be involved in it.
Desert-dust storms
Natural dust aerosols contribute most to the aerosol mass on Earth. Dust aerosols are often emitted in North Africa, but both weather forecasts and climate models are known to have a large spread in dust-emission amounts. To aid model development, I have compiled benchmark climatologies from re-analysis data for different dust-emitting processes in North Africa, e.g., nocturnal low-level jets, mobile cyclones and the post-frontal strengthening of trade winds. Estimates of dust emission amounts associated with these processes have been helpful in evaluating weather and climate models at a process level, e.g., a CMIP5 model. Find out more in my publications.
Ocean expeditions
Desert-dust aerosols are emitted in regions where the observational network is sparse. To help getting more observations, I worked on research vessels to collect atmospheric reference data over oceans. In 2017, I have led an own multi-disciplinary expedition to the North Atlantic with RV Maria S. Merian and observed a continental-scale dust outbreak, currently published in the expedition book in the series "Reports on Earth System Science“ at the Max-Planck-Institute for Meteorology. I talked about our experiences in online blogs for MPI-M, and participated in other outreach projects for inspiring the next generation of scientists.
Current Projects and Collaborations
Research area director of „Climate modelling and diagnostics“ of the Hans-Ertel-Centre for Weather Research (HErZ), phase III
Chief Energy Meteorologist at the Institute of Energy Economics (EWI) at the University of Cologne
Leader of coordinated study with MACv2-SP parameterisation for the Radiative Forcing Model Inter-comparison Project (RFMIP) endorsed by CMIP6
研究兴趣
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