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Potential source regions of biogenic aerosol number concentration apportioning at King George Island, Antarctic Peninsula

Published online by Cambridge University Press:  23 June 2010

Alexandre S. Alencar ,
Heitor Evangelista ,
Elaine A. Dos Santos ,
Sergio M. Correa ,
Myriam Khodri ,
Virginia M.T. Garcia ,
Carlos A.E. Garcia ,
Enio B. Pereira ,
Alberto R. Piola  and
Israel Felzenszwalb
Alexandre S. Alencar*
Affiliation:
Laboratório de Radioecologia e Mudanças Globais, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, PHLC - Subsolo, Maracanã, 20550-013 RJ, Brazil
Heitor Evangelista
Affiliation:
Laboratório de Radioecologia e Mudanças Globais, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, PHLC - Subsolo, Maracanã, 20550-013 RJ, Brazil
Elaine A. Dos Santos
Affiliation:
Laboratório de Radioecologia e Mudanças Globais, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, PHLC - Subsolo, Maracanã, 20550-013 RJ, Brazil
Sergio M. Correa
Affiliation:
Universidade do Estado do Rio de Janeiro, Departamento de Química Ambiental, Faculdade de Tecnologia, Rodovia Presidente Dutra, km 298, Resende, 27537-000 RJ, Brazil
Myriam Khodri
Affiliation:
UR Paleotropique, Institut de Recherche pour le Développement, 32 Avenue Henri Varagnat, 93143 Bondy Cedex, France/Laboratoire des Science du Climat et Environnement (LSCE), Gif-sur-Yvette, France
Virginia M.T. Garcia
Affiliation:
Fundação Universidade Federal do Rio Grande, Departamento de Oceanografia, Lab. Ecology of Phytoplankton and Marine Microorganisms, Av. Itália, km 8, Rio Grande, 96201-900 RS, Brazil
Carlos A.E. Garcia
Affiliation:
Fundação Universidade Federal do Rio Grande, Departamento de Física, Laboratório de Oceanografia Física, Av. Itália, km 8, Rio Grande, 96201-900 RS, Brazil
Enio B. Pereira
Affiliation:
Instituto Nacional de Pesquisas Espaciais, Departamento de Geofísica Espacial, Av. dos Astronautas 1758, Cx. Postal 515, 12201-970 São José dos Campos, SP, Brazil
Alberto R. Piola
Affiliation:
Departamento Oceanografía, Servicio Hidrografía Naval and Departamento de Ciencias de la Atmósfera y los Océanos, FCEN, Universidad de Buenos Aires, Avenida Montes de Oca 2124, Buenos Aires, Argentina
Israel Felzenszwalb
Affiliation:
Laboratório de Radioecologia e Mudanças Globais, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, PHLC - Subsolo, Maracanã, 20550-013 RJ, Brazil
*
alencar@uerj.br
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Abstract

Nowadays it is well accepted that background aerosols in the boundary layer over remote oceans are of marine origin and not aged continental. Particularly in the Atlantic sector of the Southern Ocean at least four main important regions exhibit significant ocean primary productivity. They are the Bellingshausen–Amundsen Sea, the Weddell Sea, the southern Argentinean shelf and the southern Chilean coast. In this work, we have combined ground-based continuous atmospheric sampling of aerosol number concentration (ANC), over-sea dimethyl sulphide (DMS) measurements, chlorophyll a (chl a) concentration provided by Sea-viewing Wide Field-of-view Sensor (SeaWiFS) satellite images, in situ meteorological data and monthly regional NCEP-NCAR re-analysis wind fields in order to investigate the relative contribution of each of the above regions to the apportionment of the ANC at King George Island (KGI), South Shetland Islands. Our results suggest that, at least during the period from September 1998–December 1999, the southern Argentinean shelf acted as the main contributor to the ANC measured in KGI.

Keywords

Antarcticaatmospheric transportchlorophyll adimethyl sulphide

Information

Type
Physical Sciences
Information
Antarctic Science , Volume 22 , Issue 5 , October 2010 , pp. 580 - 588
Copyright
Copyright © Antarctic Science Ltd 2010

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