We investigate the complex interaction of chemical and dynamical processes in the Earth's atmosphere on basis of distributions of trace gases, aerosols, clouds and temperature which we derive from spectral measurements of satellite remote sensing instruments. Our work field covers processing of satellite data and their validation, the research on physical and chemical processes in the atmosphere on the basis of the retrieved distributions of temperature, particles and trace gases, and the development and implementation of related satellite data analysis algorithms. The current focus of our work is the MIPAS-Envisat mission. The MIPAS satellite data derived by our group can be accessed here. Besides our work with MIPAS we are involved in the preparation of future space missions. On this website you find information about our publications, MIPAS-Envisat data, the annual MIPAS Data User Meeting, our radiative transfer model KOPRA, the team and our projects, as well as some pictures.
Highlight of the month:
HCFC-22 is a perfect tracer for troposphere-stratosphere transport
The figure shows the zonal mean distributions of HCFC-22 for July and December 2010. HCFC-22 is produced anthropogenically and destroyed in the stratosphere. Production is restricted by the Montreal protocol, so that it is almost uniquely produced in East Asia nowadays. This makes HCFC-22 to a perfect tracer for transport of East-Asian pollution by the Asian monsoon anticyclone. The maximum seen in the zonal mean distributions in the Tropical and Northern subtropic upper troposphere comes from the upward transport of enormous abundances from South-East China and India in the Asian monsoon. HCFC-22 reaches the Asian monsoon anticyclone and is transported from there into the tropical tropopause layer, from where it is uplifted in the tropical pipe into the stratosphere. A significant vertical transport directly through the Asian monsoon tropopause can almost certainly be excluded. Another nice feature in the zonal mean distributions is the transport of HCFC-22-rich mid-latitude air into the Austral spring/summer polar region in a rather confined layer between 25 and 35 km. Below this layer the remnant of polar vortex air with lower HCFC-22 values is still visible.