18.05.2017 Kolloquium: Prof. Dr. Bert Holtslag
Prof. Dr. Bert Holtslag, Meteorology and Air Quality, Wageningen University, the Netherlands
16:15 - 17:15 Uhr
In this talk an overview will be given on the current understanding and model performance for stable atmospheric boundary layers. Over the years progress has been made in understanding of stable boundary layers through observations, conceptual developments and modelling, in particular for cases with stronger turbulence. For low wind speed cases in which turbulence is not the dominant driver, we urgently need to develop conceptual frame works and test model parameterizations. As such we need to better understand the many small scale processes and their non-linear interactions in stable boundary layers. This includes besides the effects of sporadic turbulence, also longwave radiation divergence, gravity wave drag, the formation of dew and fog, the coupling to heterogeneous land and the effects of sloping terrain. Results from weather forecast and climate models are used to illustrate the state of the art as well as findings and recommendations from the Global Energy and Water Exchanges (GEWEX) Atmospheric Boundary Layer Study (GABLS).
Prof. Bert Holtslag, is a Senior Professor of Meteorology and Chair of the Meteorology and Air Quality Section at Wageningen University, the Netherlands. His research focusses on modeling and conceptual analysis of observations dealing with atmosphere-land interactions, surface fluxes, boundary layer processes, wind energy and urban meteorology. He is a fellow of the American Meteorological Society and (co-) author of more than 400 scientific publications, including about 150 well-cited peer reviewed articles in the international atmospheric scientific literature.
11. April 2017