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40,000 years ago rapid warming led to an increase in methane concentration. The culprit for this increase has now been identified. Mainly wetlands in high northern lati-tudes caused the methane increase, as discovered by a research team from the University of Bern and the German Alfred Wegener Institute.
A critical minimum for Arctic sea ice can also be expected for late summer 2010. Scientists from the Alfred Wegener Institute and from KlimaCampus of the University of Hamburg have now published data in this context in the annual issue of Sea Ice Outlook.
The IPCC (Intergovernmental Panel on Climate Change) announced the authors and experts for its fifth Assessment Report in Geneva. They include Prof. Peter Lemke and Prof. Hans-Otto Pörtner from the Alfred Wegener Institute.
Tomorrow the Polarstern research vessel sets off on its 25th Arctic expedition. From Bremerhaven it will first set course for the Greenland Sea, where primarily oceanographic work is on the agenda. Over 120 scientists and technicians from six nations are taking part in the three legs of the expedition. The Polarstern is expected back in Bremerhaven on 10 October.
Scientists have for the first time determined the complete genome sequence of a brown alga and opened a new door to the understanding of multicellularity and photosynthesis.
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