El professor David J. Stensrud, director del Department of Meteorology and Atmospheric Sciences de la Pennsylvania State University (USA) presentarà el seminari titulat "Horizontal Convective Rolls: an underappreciated circulation?".

Un breu resum del seminari:

Horizontal convective rolls (HCRs) are commonly observed as regularly-spaced lines of cloud bands, or streets, over the coastal waters when cold air flows across warm water.  Cloud streets also are observed over land, although less often.  Cursory inspection of WSR-88D clear-air observations, however, suggests that HCRs and cellular convection (cells) are a fairly common occurrence over land.  HCRs and cells are important as they act to mix the boundary layer and are known to be associated with the initiation of deep convection.  The mechanisms leading to the formation of HCRs will be summarized, and a look at the monthly frequency of HCR and cell formation in central Oklahoma will be explored for a 10-year period.  The hope is that this climatology can be used to provide a baseline for a comparison with HCRs and cells produced by numerical weather prediction models.   The value of serendipity will also be discussed.

L'acte serà a la Sala de Seminaris del 3r pis del Mateu Orfila el proper dilluns 27 de maig a les 10:30h.

Data de publicació: Thu May 23 14:33:00 CEST 2019