A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall
Previous research has shown that aerosol sea salt concentrations (Southern Ocean wind proxy) preserved in the Law Dome ice core (East Antarctica) correlate significantly with subtropical eastern Australian rainfall. However, physical mechanisms underpinning this connection have not been established....
Published in: | Communications Earth & Environment |
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Online Access: | https://doi.org/10.1038/s43247-022-00502-w http://ecite.utas.edu.au/151828 |
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ftunivtasecite:oai:ecite.utas.edu.au:151828 2023-05-15T13:42:41+02:00 A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall Udy, DG Vance, TR Kiem, AS Holbrook, NJ 2022 application/pdf https://doi.org/10.1038/s43247-022-00502-w http://ecite.utas.edu.au/151828 en eng Nature Publishing Group http://ecite.utas.edu.au/151828/2/151828 - A synoptic bridge linking sea salt aerosol concentrations in East Antarctic.pdf http://dx.doi.org/10.1038/s43247-022-00502-w Udy, DG and Vance, TR and Kiem, AS and Holbrook, NJ, A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall, Communications Earth and Environment, 3 Article 175. ISSN 2662-4435 (2022) [Refereed Article] http://ecite.utas.edu.au/151828 Earth Sciences Atmospheric sciences Atmospheric dynamics Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1038/s43247-022-00502-w 2022-12-26T23:17:08Z Previous research has shown that aerosol sea salt concentrations (Southern Ocean wind proxy) preserved in the Law Dome ice core (East Antarctica) correlate significantly with subtropical eastern Australian rainfall. However, physical mechanisms underpinning this connection have not been established. Here we use synoptic typing to show that an atmospheric bridge links East Antarctica to subtropical eastern Australia. Increased ice core sea salt concentrations and wetter conditions in eastern Australia are associated with a regional, asymmetric contraction of the mid-latitude westerlies. Decreased ice core sea salt concentrations and drier eastern Australia conditions are associated with an equatorward shift in the mid-latitude westerlies, suggesting greater broad-scale control of eastern Australia climate by southern hemisphere variability than previously assumed. This relationship explains double the rainfall variance compared to El Nio-Southern Oscillation during late spring-summer, highlighting the importance of the Law Dome ice core record as a 2000-year proxy of eastern Australia rainfall variability. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Southern Ocean eCite UTAS (University of Tasmania) Antarctic East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Southern Ocean Communications Earth & Environment 3 1 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Atmospheric sciences Atmospheric dynamics |
spellingShingle |
Earth Sciences Atmospheric sciences Atmospheric dynamics Udy, DG Vance, TR Kiem, AS Holbrook, NJ A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
topic_facet |
Earth Sciences Atmospheric sciences Atmospheric dynamics |
description |
Previous research has shown that aerosol sea salt concentrations (Southern Ocean wind proxy) preserved in the Law Dome ice core (East Antarctica) correlate significantly with subtropical eastern Australian rainfall. However, physical mechanisms underpinning this connection have not been established. Here we use synoptic typing to show that an atmospheric bridge links East Antarctica to subtropical eastern Australia. Increased ice core sea salt concentrations and wetter conditions in eastern Australia are associated with a regional, asymmetric contraction of the mid-latitude westerlies. Decreased ice core sea salt concentrations and drier eastern Australia conditions are associated with an equatorward shift in the mid-latitude westerlies, suggesting greater broad-scale control of eastern Australia climate by southern hemisphere variability than previously assumed. This relationship explains double the rainfall variance compared to El Nio-Southern Oscillation during late spring-summer, highlighting the importance of the Law Dome ice core record as a 2000-year proxy of eastern Australia rainfall variability. |
format |
Article in Journal/Newspaper |
author |
Udy, DG Vance, TR Kiem, AS Holbrook, NJ |
author_facet |
Udy, DG Vance, TR Kiem, AS Holbrook, NJ |
author_sort |
Udy, DG |
title |
A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
title_short |
A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
title_full |
A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
title_fullStr |
A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
title_full_unstemmed |
A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall |
title_sort |
synoptic bridge linking sea salt aerosol concentrations in east antarctic snowfall to australian rainfall |
publisher |
Nature Publishing Group |
publishDate |
2022 |
url |
https://doi.org/10.1038/s43247-022-00502-w http://ecite.utas.edu.au/151828 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic East Antarctica Law Dome Southern Ocean |
geographic_facet |
Antarctic East Antarctica Law Dome Southern Ocean |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Southern Ocean |
op_relation |
http://ecite.utas.edu.au/151828/2/151828 - A synoptic bridge linking sea salt aerosol concentrations in East Antarctic.pdf http://dx.doi.org/10.1038/s43247-022-00502-w Udy, DG and Vance, TR and Kiem, AS and Holbrook, NJ, A synoptic bridge linking sea salt aerosol concentrations in East Antarctic snowfall to Australian rainfall, Communications Earth and Environment, 3 Article 175. ISSN 2662-4435 (2022) [Refereed Article] http://ecite.utas.edu.au/151828 |
op_doi |
https://doi.org/10.1038/s43247-022-00502-w |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1766171667909836800 |