Environmental & Climate Sciences Department Seminar

"The Characteristics of Mesoscale Convective Systems as Revealed by Radar Wind Profilers"

Presented by Die Wang, Environmental and Climate Sciences Department, Brookhaven National Laboratory

Thursday, March 7, 2019, 11:00 am — Conference Room Bldg 815E

Deep convective clouds (DCCs) regulate the global energy and water cycles through their extensive cloud coverage and the exchange of latent heat. Through the influence of DCCs on the large-scale atmospheric Hadley and Walker circulations, DCCs affect the cloud and precipitation properties in remote tropical and subtropical environments. Unfortunately, current general circulation models (GCMs) do not properly simulate DCC role in our climate system, since relevant DCC processes operate across GCM resolved and parameterized scales. In addition, inadequate observational constraints inhibit high-resolution convective model process improvement. This talk will focus on the kinematic characteristics of DCCs using ARM ground-based observations (e.g., radar wind profiler), and the challenges faced in model evaluation (e.g., WRF). The convective up- and downdrafts of DCCs will be discussed in particular, which are the most fundamental property and are among the most difficult aspects of convection to measure.

Hosted by: Scott Giangrande

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