Moisture Transport Pathways and Isotopologues in Water Vapour
FU Berlin in Cooperation with ETH Zürich and Karlsruher Institute of Technology
Fabienne Dahinden, Franziska Aemisegger and Heini Wernli (ETH Zürich), Christopher Diekmann, Matthias Schneider and Peter Knippertz (Karlsruhe Institute of Technology), Stephan Pfahl (FU Berlin)
Moisture transport pathways and processes over the subtropical North Atlantic and Africa are investigated based on a combination of remote sensing observations and model simulations of the isotopic composition of atmospheric water vapour. In this way, it will be evaluated if such isotope observations can serve as additional constraints on the representation of the subtropical water cycle in numerical models.
The Effect of Latent Heating on Blocking High Pressure Areas
In cooperation with the ETH Zürich
Stephan Pfahl, Daniel Steinfeld
New studies have shown that the release of latent heat during cloud formation in rising air masses plays an important role in the formation of blocking high pressure areas ("blocking"). Current blocking theories do not take this process sufficiently into account. It could be a reason for the problems in the simulation of blocking in climate models and lead to future changes in the frequency of blocking high pressure areas in a warmer climate. In this project we want to improve our understanding of the relationship between latent heat release and blocking using Lagrangian diagnostics. This will be done using reanalysis data, global climate simulations and sensitivity experiments in which the release of latent heat is modified.