[Todos] [Coloquios] **RECORDATORIO** Coloquios DCAO/CIMA - MARTES (06/09/2022) 13hs PRESENCIAL

[coloquios en cima.fcen.uba.ar]

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Coloquios del Departamento de Ciencias de la Atmósfera y los Océanos 
(DCAO)/
Centro de Investigaciones del Mar y la Atmósfera (CIMA)
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MARTES 06/09, a las 13hs:

**** Presencial: Aula 8 (ex Dcao, 2do piso, Pab 2) ****
(Con el orador presente)

Unirse a la reunión Zoom
https://exactas-uba.zoom.us/j/83538811373
ID de reunión: 835 3881 1373
Código de acceso: coloquios

  “Daytime convective development over land: the role of surface forcing”
Dr. Wojciech Grabowski,  Faculty of Physics,University of Warsaw

Diurnal cycle of solar radiation over tropical and midlatitude 
summertime continents forces strong evolution of atmospheric convection. 
As surface sensible and latent heat fluxes increase after sunrise, a dry 
convective boundary layer develops in the early morning hours. It 
proceeds with the formation of shallow convective clouds as the 
convective boundary layer deepens and may eventually lead to the 
transition from shallow to deep precipitating convection. Factors 
affecting shallow-to-deep convection transition have been studied in the 
past, but the early evolution of dry convection and how it affects 
development of shallow convection and eventual transition to deep 
convection attracted much less attention.
This presentation will discuss a set of large-eddy simulations that 
considers the impact of the surface flux Bowen ratio, the partitioning 
of the surface heat flux into sensible and latent components, on the 
development of dry and eventually moist convection. The key point is 
that the Bowen ratio affects the surface buoyancy flux and thus growth 
of dry convective boundary layer before the moist convection onset. This 
has a strong impact on the development and organization of shallow 
convection and eventual transition to deep convection. Details of the 
simulation results will be discussed.

Dr. Wojciech Grabowski is a Polish-American cloud physicist. He obtained 
his MSc and PhD
degrees in Poland (from the University of Warsaw’s Physics Department 
and Polish Academy of
Sciences, respectively) in the 1980ies. He moved to the National Center 
for Atmospheric
Research (NCAR) in 1987 after receiving a prestigious NCAR’s Advanced 
Study Program
Postdoctoral Fellowship. He has been at NCAR since then, currently as a 
Senior Scientist (since
2005) at the Mesoscale and Microscale Meteorology Laboratory. His main 
areas of interest
include computational fluid dynamics and numerical modeling in general, 
and more specifically
modeling of cloud dynamics and microphysics, interactions of clouds with 
radiation and surface
processes, and representation of these processes in numerical models of 
small-scale dynamics,
weather, and climate. He obtained habilitation [a post-PhD degree, 
equivalent of the Doctor of
Science (DSc)] from the Institute of Geophysics, Polish Academy of 
Sciences, Warsaw, Poland,
in 1999. In 2013 he received the title of Professor of Physical Sciences 
of the Republic of
Poland. He was a member of the Committee on Cloud Physics of the 
American Meteorological
Society between 1995 and 1998, and a member of the International 
Commission on Clouds and
Precipitation between 2000 and 2008. He is a Fellow of the Royal 
Meteorological Society and of
the American Meteorological Society. He is the Affiliate Professor of 
the Faculty of Physics,
University of Warsaw. Dr. Grabowski published over 160 papers in 
atmospheric science journals
and similar number of papers in conference proceedings. His papers 
attracted over 11,000
citations (H=57, 
https://scholar.google.com/citations?user=WVjmW3wAAAAJ&hl=en). He
served as a member of editorial boards for the Quarterly Journal of the 
Royal Meteorological
Society (2001-2008), Atmospheric Science Letters (2000-2011), Journal of 
the Atmospheric
Sciences (2006-2019), and the Journal of Advances in Modeling Earth 
Systems (JAMES, 2008-
2011).

¡¡Les esperamos!!


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Grupo Coloquios DCAO/CIMA
Departamento de Ciencias de la Atmósfera y los Océanos (FCEN-UBA)
Centro de Investigaciones del Mar y la Atmósfera (CONICET-UBA)
Ciudad Universitaria, Pabellón II, 2do piso.
email: coloquios en cima.fcen.uba.ar
http://www.at.fcen.uba.ar/charlas_not.php
http://www.cima.fcen.uba.ar/coloquios.php
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