Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate
The preferential altitude of transport of continental tracers towards Antarctica under present and Last Glacial Maximum (21 kyr BP) conditions is analysed using an atmospheric general circulation model with idealized tracers which are emitted at the surface of Australia and South America. It is show...
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Online Access: | http://hdl.handle.net/10281/7019 https://doi.org/10.1016/j.quascirev.2009.06.020 |
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ftunivmilanobic:oai:boa.unimib.it:10281/7019 2024-04-14T08:02:36+00:00 Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate Krinner, G Petit, JR DELMONTE, BARBARA Krinner, G Petit, J Delmonte, B 2010 STAMPA http://hdl.handle.net/10281/7019 https://doi.org/10.1016/j.quascirev.2009.06.020 eng eng Elsevier Ltd info:eu-repo/semantics/altIdentifier/wos/WOS:000274958000024 volume:29 issue:1-2 firstpage:274 lastpage:284 numberofpages:11 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/7019 doi:10.1016/j.quascirev.2009.06.020 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-73549104561 Global Circulation Models Troposphere Mineral dust polar vortex GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA info:eu-repo/semantics/article 2010 ftunivmilanobic https://doi.org/10.1016/j.quascirev.2009.06.020 2024-03-21T16:28:09Z The preferential altitude of transport of continental tracers towards Antarctica under present and Last Glacial Maximum (21 kyr BP) conditions is analysed using an atmospheric general circulation model with idealized tracers which are emitted at the surface of Australia and South America. It is shown that the difference between the preferential transport altitude of Australian and South American tracers is similar in glacial and interglacial climates. Australian tracers arriving in Antarctica are consistently transported at higher altitudes than tracers emitted in South America. The frequency of low-level transport is stronger at the LGM than at present, reflecting a more vigorous atmospheric circulation at the LGM as a consequence of increased baroclinicity. While the spatial patterns of the total tracer concentrations at the Antarctic surface differ for Australian and South American tracers, with the regions of maximum surface concentration being located to the south-east of the respective tracer sources, the spatial distribution of the part advected via upper atmospheric levels is very similar for the Australian and South American tracers, with a maximum over Queen Maud Land. The simulated changes in transport characteristics cannot explain observed glacial to interglacial variations of dust size spectra which have been interpreted as indicators of the relative intensity of upper and lower level atmospheric dust transport to Antarctica. © 2009 Elsevier Ltd. All rights reserved Article in Journal/Newspaper Antarc* Antarctic Antarctica Queen Maud Land Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Antarctic Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) The Antarctic Quaternary Science Reviews 29 1-2 274 284 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Global Circulation Models Troposphere Mineral dust polar vortex GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
spellingShingle |
Global Circulation Models Troposphere Mineral dust polar vortex GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA Krinner, G Petit, JR DELMONTE, BARBARA Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
topic_facet |
Global Circulation Models Troposphere Mineral dust polar vortex GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
description |
The preferential altitude of transport of continental tracers towards Antarctica under present and Last Glacial Maximum (21 kyr BP) conditions is analysed using an atmospheric general circulation model with idealized tracers which are emitted at the surface of Australia and South America. It is shown that the difference between the preferential transport altitude of Australian and South American tracers is similar in glacial and interglacial climates. Australian tracers arriving in Antarctica are consistently transported at higher altitudes than tracers emitted in South America. The frequency of low-level transport is stronger at the LGM than at present, reflecting a more vigorous atmospheric circulation at the LGM as a consequence of increased baroclinicity. While the spatial patterns of the total tracer concentrations at the Antarctic surface differ for Australian and South American tracers, with the regions of maximum surface concentration being located to the south-east of the respective tracer sources, the spatial distribution of the part advected via upper atmospheric levels is very similar for the Australian and South American tracers, with a maximum over Queen Maud Land. The simulated changes in transport characteristics cannot explain observed glacial to interglacial variations of dust size spectra which have been interpreted as indicators of the relative intensity of upper and lower level atmospheric dust transport to Antarctica. © 2009 Elsevier Ltd. All rights reserved |
author2 |
Krinner, G Petit, J Delmonte, B |
format |
Article in Journal/Newspaper |
author |
Krinner, G Petit, JR DELMONTE, BARBARA |
author_facet |
Krinner, G Petit, JR DELMONTE, BARBARA |
author_sort |
Krinner, G |
title |
Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
title_short |
Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
title_full |
Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
title_fullStr |
Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
title_full_unstemmed |
Altitude of atmospheric tracer transport towards Antarctica in present and glacial climate |
title_sort |
altitude of atmospheric tracer transport towards antarctica in present and glacial climate |
publisher |
Elsevier Ltd |
publishDate |
2010 |
url |
http://hdl.handle.net/10281/7019 https://doi.org/10.1016/j.quascirev.2009.06.020 |
long_lat |
ENVELOPE(12.000,12.000,-72.500,-72.500) |
geographic |
Antarctic Queen Maud Land The Antarctic |
geographic_facet |
Antarctic Queen Maud Land The Antarctic |
genre |
Antarc* Antarctic Antarctica Queen Maud Land |
genre_facet |
Antarc* Antarctic Antarctica Queen Maud Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000274958000024 volume:29 issue:1-2 firstpage:274 lastpage:284 numberofpages:11 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/7019 doi:10.1016/j.quascirev.2009.06.020 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-73549104561 |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.06.020 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
1-2 |
container_start_page |
274 |
op_container_end_page |
284 |
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1796316071440941056 |