Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis.
In the backdrop of global warming, Antarctic sea-ice variability showed an overall expansion with the regional heterogeneity of increasing and decreasing patterns. Analysis of satellite derived sea-ice extent, during 1979 to 2015, in the Indian Ocean sector of Antarctica (IOA) revealed expansion of...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science (PLoS)
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0203222 https://doaj.org/article/0226611922204bb2bf49f034654c1a87 |
id |
ftdoajarticles:oai:doaj.org/article:0226611922204bb2bf49f034654c1a87 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:0226611922204bb2bf49f034654c1a87 2023-05-15T14:00:54+02:00 Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. Babula Jena Avinash Kumar M Ravichandran Stefan Kern 2018-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0203222 https://doaj.org/article/0226611922204bb2bf49f034654c1a87 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC6169864?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0203222 https://doaj.org/article/0226611922204bb2bf49f034654c1a87 PLoS ONE, Vol 13, Iss 10, p e0203222 (2018) Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1371/journal.pone.0203222 2022-12-31T03:14:58Z In the backdrop of global warming, Antarctic sea-ice variability showed an overall expansion with the regional heterogeneity of increasing and decreasing patterns. Analysis of satellite derived sea-ice extent, during 1979 to 2015, in the Indian Ocean sector of Antarctica (IOA) revealed expansion of 2.4±1.2% decade-1. We find strengthening of westerly wind during the austral summer (between 50°S to 62°S) facilitated northward advection of a cool and fresh layer. Also, the strong westerly wind cools the upper ocean due to net heat loss from the ocean surface. The combined effect of northward advection of cold fresh layer and net heat loss from the surface, favours sea-ice expansion in the subsequent seasons, in the IOA region, north of 62°S. However, sea-ice retreat was observed near the Kerguelen Plateau, due to upper ocean warming, and hence a non-annular pattern of sea-ice extent in the IOA was observed. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Austral Kerguelen Indian PLOS ONE 13 10 e0203222 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Babula Jena Avinash Kumar M Ravichandran Stefan Kern Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
topic_facet |
Medicine R Science Q |
description |
In the backdrop of global warming, Antarctic sea-ice variability showed an overall expansion with the regional heterogeneity of increasing and decreasing patterns. Analysis of satellite derived sea-ice extent, during 1979 to 2015, in the Indian Ocean sector of Antarctica (IOA) revealed expansion of 2.4±1.2% decade-1. We find strengthening of westerly wind during the austral summer (between 50°S to 62°S) facilitated northward advection of a cool and fresh layer. Also, the strong westerly wind cools the upper ocean due to net heat loss from the ocean surface. The combined effect of northward advection of cold fresh layer and net heat loss from the surface, favours sea-ice expansion in the subsequent seasons, in the IOA region, north of 62°S. However, sea-ice retreat was observed near the Kerguelen Plateau, due to upper ocean warming, and hence a non-annular pattern of sea-ice extent in the IOA was observed. |
format |
Article in Journal/Newspaper |
author |
Babula Jena Avinash Kumar M Ravichandran Stefan Kern |
author_facet |
Babula Jena Avinash Kumar M Ravichandran Stefan Kern |
author_sort |
Babula Jena |
title |
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
title_short |
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
title_full |
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
title_fullStr |
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
title_full_unstemmed |
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis. |
title_sort |
mechanism of sea-ice expansion in the indian ocean sector of antarctica: insights from satellite observation and model reanalysis. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2018 |
url |
https://doi.org/10.1371/journal.pone.0203222 https://doaj.org/article/0226611922204bb2bf49f034654c1a87 |
geographic |
Antarctic Austral Kerguelen Indian |
geographic_facet |
Antarctic Austral Kerguelen Indian |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
PLoS ONE, Vol 13, Iss 10, p e0203222 (2018) |
op_relation |
http://europepmc.org/articles/PMC6169864?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0203222 https://doaj.org/article/0226611922204bb2bf49f034654c1a87 |
op_doi |
https://doi.org/10.1371/journal.pone.0203222 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
10 |
container_start_page |
e0203222 |
_version_ |
1766270294206447616 |