[Todos] [Coloquios] Coloquios DCAO/CIMA - MIÉRCOLES (09/05/2018):"Origin and impacts of Antarctic aerosols"

[Coloquios CIMA-DCAO]

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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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MIÉRCOLES 09/05, a las 13h:
Aula 8-⁠DCAO, 2° Piso, Pabellón 2

"Origin and impacts of Antarctic aerosols"

Dra. Eija Asmi (Servicio Meteorológico Nacional/Instituto Meteorológico 
de Finlandia)

Aerosol particles have dual impact in the atmosphere: in one side, they 
are atmospheric pollutants affecting the health of populations, while in 
the other side they induce a net positive effect on global climate. The 
aerosol impacts on climate are various. They interact with radiation and 
thus affect the surface and tropospheric temperatures. They are critical 
initial embryos for new cloud droplets and affect cloud lifetimes and 
precipitation. In Antarctica, we are measuring various properties of 
these particles: chemical composition, size distribution, scattering and 
absorbing characteristic and vertical profiles – continuously since year 
2013. With these data, we are investigating the origin of these 
particles: what fraction is due to human actions, and what fraction is 
natural. These questions are critical for global climate modelling. Our 
study also highlights the interactions with meteorological parameters 
and aerosols. For example, high wind speeds are seen to lead to intense 
production of marine sea salt particles and resuspension of soil dust. 
The strong interannual variation of boundary layer height, connected 
with radiation, affects the mixing depth of the particles and thus their 
surface concentrations. Natural particles form the vast majority of all 
aerosol but our results also suggest a minor human impact, extending all 
the way to Antarctica.

CV: https://fi.linkedin.com/in/eija-asmi

¡¡Los 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)

email: coloquios en cima.fcen.uba.ar

http://www.at.fcen.uba.ar/charlas_not.php

http://www.cima.fcen.uba.ar/espanol/index.htm

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