Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica
Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 27 (2014): 1343–1363, doi:10.1175/JCLI-D-13-00148.1. The climate...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/6477 2023-05-15T13:24:16+02:00 Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica Criscitiello, Alison S. Das, Sarah B. Karnauskas, Kristopher B. Evans, Matthew J. Frey, Karen E. Joughin, Ian Steig, Eric J. McConnell, Joseph R. Medley, Brooke 2014-02-01 application/pdf https://hdl.handle.net/1912/6477 en_US eng American Meteorological Society https://doi.org/10.1175/JCLI-D-13-00148.1 Journal of Climate 27 (2014): 1343–1363 https://hdl.handle.net/1912/6477 doi:10.1175/JCLI-D-13-00148.1 Journal of Climate 27 (2014): 1343–1363 doi:10.1175/JCLI-D-13-00148.1 Antarctica Sea ice Teleconnections Atmosphere-ocean interaction Climate records Interannual variability Article 2014 ftwhoas https://doi.org/10.1175/JCLI-D-13-00148.1 2022-05-28T22:59:03Z Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 27 (2014): 1343–1363, doi:10.1175/JCLI-D-13-00148.1. The climate of West Antarctica is strongly influenced by remote forcing from the tropical Pacific. For example, recent surface warming over West Antarctica reflects atmospheric circulation changes over the Amundsen Sea, driven by an atmospheric Rossby wave response to tropical sea surface temperature (SST) anomalies. Here, it is demonstrated that tropical Pacific SST anomalies also influence the source and transport of marine-derived aerosols to the West Antarctic Ice Sheet. Using records from four firn cores collected along the Amundsen coast of West Antarctica, the relationship between sea ice–modulated chemical species and large-scale atmospheric variability in the tropical Pacific from 1979 to 2010 is investigated. Significant correlations are found between marine biogenic aerosols and sea salts, and SST and sea level pressure in the tropical Pacific. In particular, La Niña–like conditions generate an atmospheric Rossby wave response that influences atmospheric circulation over Pine Island Bay. Seasonal regression of atmospheric fields on methanesulfonic acid (MSA) reveals a reduction in onshore wind velocities in summer at Pine Island Bay, consistent with enhanced katabatic flow, polynya opening, and coastal dimethyl sulfide production. Seasonal regression of atmospheric fields on chloride (Cl−) reveals an intensification in onshore wind velocities in winter, consistent with sea salt transport from offshore source regions. Both the source and transport of marine aerosols to West Antarctica are found to be modulated by similar atmospheric dynamics in response to remote forcing. Finally, the regional ice-core array suggests that there is both a temporally and a spatially varying response to remote tropical forcing. This ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica ice core Ice Sheet Pine Island Pine Island Bay Sea ice West Antarctica Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pacific Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Amundsen Coast ENVELOPE(-162.000,-162.000,-85.500,-85.500) Journal of Climate 27 3 1343 1363 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Antarctica Sea ice Teleconnections Atmosphere-ocean interaction Climate records Interannual variability |
spellingShingle |
Antarctica Sea ice Teleconnections Atmosphere-ocean interaction Climate records Interannual variability Criscitiello, Alison S. Das, Sarah B. Karnauskas, Kristopher B. Evans, Matthew J. Frey, Karen E. Joughin, Ian Steig, Eric J. McConnell, Joseph R. Medley, Brooke Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
topic_facet |
Antarctica Sea ice Teleconnections Atmosphere-ocean interaction Climate records Interannual variability |
description |
Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 27 (2014): 1343–1363, doi:10.1175/JCLI-D-13-00148.1. The climate of West Antarctica is strongly influenced by remote forcing from the tropical Pacific. For example, recent surface warming over West Antarctica reflects atmospheric circulation changes over the Amundsen Sea, driven by an atmospheric Rossby wave response to tropical sea surface temperature (SST) anomalies. Here, it is demonstrated that tropical Pacific SST anomalies also influence the source and transport of marine-derived aerosols to the West Antarctic Ice Sheet. Using records from four firn cores collected along the Amundsen coast of West Antarctica, the relationship between sea ice–modulated chemical species and large-scale atmospheric variability in the tropical Pacific from 1979 to 2010 is investigated. Significant correlations are found between marine biogenic aerosols and sea salts, and SST and sea level pressure in the tropical Pacific. In particular, La Niña–like conditions generate an atmospheric Rossby wave response that influences atmospheric circulation over Pine Island Bay. Seasonal regression of atmospheric fields on methanesulfonic acid (MSA) reveals a reduction in onshore wind velocities in summer at Pine Island Bay, consistent with enhanced katabatic flow, polynya opening, and coastal dimethyl sulfide production. Seasonal regression of atmospheric fields on chloride (Cl−) reveals an intensification in onshore wind velocities in winter, consistent with sea salt transport from offshore source regions. Both the source and transport of marine aerosols to West Antarctica are found to be modulated by similar atmospheric dynamics in response to remote forcing. Finally, the regional ice-core array suggests that there is both a temporally and a spatially varying response to remote tropical forcing. This ... |
format |
Article in Journal/Newspaper |
author |
Criscitiello, Alison S. Das, Sarah B. Karnauskas, Kristopher B. Evans, Matthew J. Frey, Karen E. Joughin, Ian Steig, Eric J. McConnell, Joseph R. Medley, Brooke |
author_facet |
Criscitiello, Alison S. Das, Sarah B. Karnauskas, Kristopher B. Evans, Matthew J. Frey, Karen E. Joughin, Ian Steig, Eric J. McConnell, Joseph R. Medley, Brooke |
author_sort |
Criscitiello, Alison S. |
title |
Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
title_short |
Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
title_full |
Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
title_fullStr |
Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
title_full_unstemmed |
Tropical Pacific influence on the source and transport of marine aerosols to West Antarctica |
title_sort |
tropical pacific influence on the source and transport of marine aerosols to west antarctica |
publisher |
American Meteorological Society |
publishDate |
2014 |
url |
https://hdl.handle.net/1912/6477 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) ENVELOPE(-162.000,-162.000,-85.500,-85.500) |
geographic |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pacific Island Bay Pine Island Bay Amundsen Coast |
geographic_facet |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Pacific Island Bay Pine Island Bay Amundsen Coast |
genre |
Amundsen Sea Antarc* Antarctic Antarctica ice core Ice Sheet Pine Island Pine Island Bay Sea ice West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica ice core Ice Sheet Pine Island Pine Island Bay Sea ice West Antarctica |
op_source |
Journal of Climate 27 (2014): 1343–1363 doi:10.1175/JCLI-D-13-00148.1 |
op_relation |
https://doi.org/10.1175/JCLI-D-13-00148.1 Journal of Climate 27 (2014): 1343–1363 https://hdl.handle.net/1912/6477 doi:10.1175/JCLI-D-13-00148.1 |
op_doi |
https://doi.org/10.1175/JCLI-D-13-00148.1 |
container_title |
Journal of Climate |
container_volume |
27 |
container_issue |
3 |
container_start_page |
1343 |
op_container_end_page |
1363 |
_version_ |
1766378395743027200 |