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

• Published in: Antarctic Science
• Main Authors: Alencar, Alexandre, Evangelista, Heitor, dos Santos, Elaine, Correa, Sergio, Khodri, Myriam, Garcia, Virginia M.T., Garcia, Carlos A.E., Pereira, Enio, Piola, Alberto, Felzenszwalb, Israel
• Other Authors: Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Modélisation du climat (CLIM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: Antarctica; atmospheric transport; chlorophyll a; dimethyl sulphide; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Amundsen Sea; Antarc*; Antarctic; Antarctic Peninsula; Antarctic Science; King George Island; South Shetland Islands; Southern Ocean; Weddell Sea
• Online Access: https://hal.science/hal-03199872; https://hal.science/hal-03199872/document; https://hal.science/hal-03199872/file/download.pdf; https://doi.org/10.1017/S0954102010000398

International audience 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.