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....

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Published in:Communications Earth & Environment
Main Authors: Udy, DG, Vance, TR, Kiem, AS, Holbrook, NJ
Format: Article in Journal/Newspaper
Language:English
Published: Nature Publishing Group 2022
Subjects:
Online Access:https://doi.org/10.1038/s43247-022-00502-w
http://ecite.utas.edu.au/151828
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spelling 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
institution 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
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