Dienstag, 10. Mai 2022, 16:30 - 18:00 iCal

Vortrag von Franziska AEMISEGGER

(ETH Zürich)


"Addressing the cloud-circulation conundrum in the North Atlantic trades using water isotopes"


Vortrag im Rahmen des Meteorologisch-Geophysikalischen Kolloquiums.

Room 2B204, (Eberhard Clar Saal), Althanstr. 14, UZA 2, 1090 Vienna
Althanstr, 14, UZA 2, 1090 Wien


Abstract: Shallow cumulus clouds, the most frequent cloud type on Earth, are at the heart of current uncertainties in future climate projections. These boundary layer clouds form due to a subtle interplay between the large-scale atmospheric circulation and small-scale physical processes embedded in the flow. In this presentation, I will show how stable water isotopes can be used as measurable tracers of this interplay and thus serve as a tool to link different flow regimes in the North Atlantic winter trades with mesoscale shallow cumulus cloud patterns. A case study using measurements from the Caribbean island Barbados will highlight the importance of midlatitude Rossby wave breaking for the formation of two frequently occurring mesoscale cloud patterns. Finally, a climatological perspective will emphasise the substantial interannual variability in the occurrence frequency of extratropical flow regimes in the North Atlantic trade wind region.


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Institut für Meteorologie und Geophysik


Andreas Plach/Herta Gassner
Institut für Meteorologie und Geophysik