Atmospheric precursors to the Antarctic sea ice record low in February 2022
Abstract Antarctic sea ice expansion and recession are asymmetric in nature, with regional and temporal variations. The decade-long overall increase in the Antarctic sea ice extent (SIE) until 2015 showed a decrease in recent years since satellite records were available. The present study focused on...
Published in: | Environmental Research Communications |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
IOP Publishing
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2/pdf |
id |
crioppubl:10.1088/2515-7620/aca5f2 |
---|---|
record_format |
openpolar |
spelling |
crioppubl:10.1088/2515-7620/aca5f2 2024-09-15T17:39:09+00:00 Atmospheric precursors to the Antarctic sea ice record low in February 2022 Yadav, Juhi Kumar, Avinash Mohan, Rahul 2022 http://dx.doi.org/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Communications volume 4, issue 12, page 121005 ISSN 2515-7620 journal-article 2022 crioppubl https://doi.org/10.1088/2515-7620/aca5f2 2024-09-02T04:13:31Z Abstract Antarctic sea ice expansion and recession are asymmetric in nature, with regional and temporal variations. The decade-long overall increase in the Antarctic sea ice extent (SIE) until 2015 showed a decrease in recent years since satellite records were available. The present study focused on determining the atmospheric forcing and climate fluctuations responsible for the lowest SIE record in February 2022. Here, the lowest SIE record was assumed to result from the sea ice recession that began in September 2021. The SIE reached a record low of 2.16 × 10 6 km 2 in February 2022, which was 43% lower than the mean extent of the previous February months since the satellite era. However, the second-lowest SIE was recorded from November 2021 to January 2022. The Weddell Sea, Ross Sea, and Bellingshausen/Amundsen Seas (ABS) sectors experienced the maximum sea ice change on a regional scale. The record-low SIE occurred when the Amundsen Sea Low (ASL) pressure center was intensified, with the Southern Annular Mode (SAM) at its positive phase. Together, these two climate fluctuations played a role in modifying the pressure and wind patterns in Antarctica. The warm northerly winds largely contributed to decreased SIE. Further, the study investigated the Polar Cap Height (PCH), which demonstrates a strengthening of the stratospheric polar vortex and positive polarity of the SAM. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Sea ice Weddell Sea IOP Publishing Environmental Research Communications |
institution |
Open Polar |
collection |
IOP Publishing |
op_collection_id |
crioppubl |
language |
unknown |
description |
Abstract Antarctic sea ice expansion and recession are asymmetric in nature, with regional and temporal variations. The decade-long overall increase in the Antarctic sea ice extent (SIE) until 2015 showed a decrease in recent years since satellite records were available. The present study focused on determining the atmospheric forcing and climate fluctuations responsible for the lowest SIE record in February 2022. Here, the lowest SIE record was assumed to result from the sea ice recession that began in September 2021. The SIE reached a record low of 2.16 × 10 6 km 2 in February 2022, which was 43% lower than the mean extent of the previous February months since the satellite era. However, the second-lowest SIE was recorded from November 2021 to January 2022. The Weddell Sea, Ross Sea, and Bellingshausen/Amundsen Seas (ABS) sectors experienced the maximum sea ice change on a regional scale. The record-low SIE occurred when the Amundsen Sea Low (ASL) pressure center was intensified, with the Southern Annular Mode (SAM) at its positive phase. Together, these two climate fluctuations played a role in modifying the pressure and wind patterns in Antarctica. The warm northerly winds largely contributed to decreased SIE. Further, the study investigated the Polar Cap Height (PCH), which demonstrates a strengthening of the stratospheric polar vortex and positive polarity of the SAM. |
format |
Article in Journal/Newspaper |
author |
Yadav, Juhi Kumar, Avinash Mohan, Rahul |
spellingShingle |
Yadav, Juhi Kumar, Avinash Mohan, Rahul Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
author_facet |
Yadav, Juhi Kumar, Avinash Mohan, Rahul |
author_sort |
Yadav, Juhi |
title |
Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
title_short |
Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
title_full |
Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
title_fullStr |
Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
title_full_unstemmed |
Atmospheric precursors to the Antarctic sea ice record low in February 2022 |
title_sort |
atmospheric precursors to the antarctic sea ice record low in february 2022 |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2 https://iopscience.iop.org/article/10.1088/2515-7620/aca5f2/pdf |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Sea ice Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Sea ice Weddell Sea |
op_source |
Environmental Research Communications volume 4, issue 12, page 121005 ISSN 2515-7620 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/2515-7620/aca5f2 |
container_title |
Environmental Research Communications |
_version_ |
1810477833680584704 |