Conveners
Earth System Modelling & New observational systems and sources of information
- Andreas Wahner (Forschungszentrum Jülich IEK-8: Troposphere)
The ICOsahedral Non-hydrostatic (ICON) modelling system was originally developed by DWD and MPI-M for a range of weather (forecast) and climate applications. An Aerosols and Reactive Tracers (ART) module was added by KIT to enable a comprehensive assessment of composition interactions within the atmospheric domain. Recognising that atmospheric processes happen on a multitude of temporal and...
Tropospheric ozone is harmful to human health and ecosystems. The mixing ratio of ground-level ozone at any given location is influenced by a wide array of factors including local chemical production and long-range transport over intercontinental distances. Here we present a system for the attribution of ground-level ozone to its emitted precursors and use it to show how ozone precursor...
In West Africa, the effects of climate change are already being felt, with increases in the intensity of extreme rainfall observed in rain gauge and satellite datasets over the last few decades. Given the region’s high vulnerability, an understanding of how extreme rainfall events may change further in the future climate is vital.
West Africa receives the majority of its rainfall via...
Severe thunderstorms over South America are among the most intense worldwide. However, due to low population density and limited research activities their distribution and characteristics are less understood than in other regions, although this information is crucial, for instance for insurance companies. We use a well-established hail hazard modeling approach, which has already been used over...
The Swabian MOSES field campaign investigated atmospheric drivers responsible for the frequently observed initiation of severe thunderstorms between the Black Forest and the Swabian Jura. A suspected triggering mechanism is lee-side flow convergence, but detailed observational evidence of this phenomena is largely missing. To gain insight into flow characteristics, first measurements with a...
Air pollution from South Asia, in particular heavily polluted Indo-Gangetic Plain (IGP) impact public health, ecosystems, and climate not only in the region but also the downwind regions like the Himalayan and Tibetan Plateau mountain regions. According to the latest IPCC report this region is still one of the least studied regions in the world in terms of atmospheric observations and many air...
The impact of the changing climate on cloud properties is still not fully understood. To improve our knowledge and thus the representation of clouds in models, the goal of ACTRIS (Aerosol, Clouds and Trace gases Research Infrastructure) Topical Center CIS (Cloud In Situ) is to establish a monitoring network for key cloud properties.
CIS consists of four units to measure (1) ice nucleating...
Emission data as the main input to air quality forecast models introduce large uncertainties. These data originate from emission inventories that provide estimates of spatially distributed emissions. The impact of fixed temporal distribution functions in contrast to variable societal behavior and meteorological implications are rarely considered. To evaluate the annual emission totals of...
Field, source and kinetic isotope analyzes are combined with a Lagrangian approach of receptor modeling to separate chemical degradation from changes related to source strength. Eventually, the local vs. long-range transport, as well as biogenic vs anthropogenic contribution of investigated pollutants can be differentiated.
