This news release is available in German.
Leipzig. The German Research Foundation (DFG) supports the new Transregional Collaborative Research Centre TR 172 'Arctic climate change' represented by the speaker Prof. Dr. Manfred Wendisch, meteorologist from Leipzig University, during the next four years. After a successful first phase, up to two additional four-year funding periods are envisaged. In January 2016 the research network will start. Research partners in the project are the Leipzig University, the University of Bremen, the University of Cologne, the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) and the Leibniz Institute for Tropospheric Research (TROPOS) in Leipzig. It is the first systematic large-scale investigation on this subject in Germany.
The aim of the research network is to observe the climate changes in the Arctic with a multitude of methods over longer periods in order to further develop the reliability of models to project the observed significant warming in the Arctic. The causes of this above-average warming is based on various factors that affect the Arctic climate and which are not fully understood yet. "The funding of our Transregional Collaborative Research Center (CRC) is a milestone for us. Thereby we receive generous financial resources in order to investigate a very complex research topic on a relatively long term," Prof. Manfred Wendisch said. He is the speaker of this Transregional CRC, which consists of a total of 21 subprojects. Vice Speaker of the project are Prof. Susanne Crewell of the University of Cologne and Prof. Justus Notholt of the University of Bremen.
During the past 25 years a remarkable increase in surface air temperature has been observed in the Arctic, which exceeds global warming by two to three times. This phenomenon, which is referred to as Arctic Amplification, leads to dramatic changes in a multitude of climate parameters, according to Wendisch. For example, it has been observed from satellites that Arctic sea ice has strongly retreated in the annual Arctic summer. "In the last 25 years the ice of the Arctic Ocean has decreased by more than half. It could very well be that there will be no more sea ice during the Arctic summer period in 40 to 50 years, " Wendisch said about particularly drastic effects of climate change in the Arctic.
However, climate models don't describe this decline properly. "Therefore, it is very important to identify the origin of these discrepancies," outlines the meteorologist a core objective of the research network. To improve the accuracy of these predictions, the existing scientific knowledge and expertise of three German universities and two non-university research institutes are combined in the context of the Transregional CRC. Observations of measuring instruments on satellites, aircraft, airborne balloon platforms, research vessels and the measurements of selected ground-based monitoring stations will be integrated into certain research campaigns and combined with long-term measurements.
In the first phase of the research center the focus will be on atmospheric and surface processes, because the fast changes in Arctic climate suggest that important atmospheric factors are involved in these mechanisms. In the second and third phases, especially the interactions between oceanic and atmospheric components of the Arctic amplification and related global effects will be examined more closely. Among other measures the scientists plan to 'freeze' the research vessel 'Polarstern' of the Alfred Wegener Institute to drift through the Arctic Ocean for 14 months. This will be the first time for this research icebreaker, which was previously almost 100 expeditions in use.
The Leibniz Institute for Tropospheric Research (TROPOS) leads the two-month 'Polarstern' expedition in the summer of 2017, which is essential for the Transregional CRC. It is also involved in the more than one-year ice drift of the RV 'Polarstern' 2019/20. The influence of aerosol particles and clouds on the energy balance at the ice surface will be surveyed with an expressively comprehensive set of physical and chemical measurement instruments and models. "We consider it as a huge opportunity and challenge to contribute to the explenation of the massive sea ice retreat in the Arctic with our expertise," Prof. Andreas Macke, the director of TROPOS says. "We are involved with the almost complete spectrum of our tools and models: Thus, our institute contributes significantly to the success of the CRC".
Prof. Dr. Manfred Wendisch
Speaker, Leipzig Institute for Meteorology, Leipzig University
Prof. Dr. Susanne Crewell
Vice speaker, Institute for Geophysics and Meteorology, University of Cologne
Prof. Dr. Justus Notholt
Vice speaker, Institute Environmental Physics, University of Bremen
Prof. Dr. Andreas Macke
Director, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig
PIO of Leipzig University
PIO of TROPOS
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