The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica
East Antarctica is undergoing a noticeable decrease in precipitation, significantly impacting ice mass loss. However, there is a lack of research on the underlying factors behind this change. This study highlights that on an interannual timescale, the precipitation variations in Eastern East Antarct...
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Online Access: | http://dx.doi.org/10.3389/feart.2024.1387809 https://www.frontiersin.org/articles/10.3389/feart.2024.1387809/full |
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crfrontiers:10.3389/feart.2024.1387809 2024-05-12T07:56:09+00:00 The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica Lee, Hyun-Ju Jin, Emilia Kyung Ministry of Oceans and Fisheries 2024 http://dx.doi.org/10.3389/feart.2024.1387809 https://www.frontiersin.org/articles/10.3389/feart.2024.1387809/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 12 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2024 crfrontiers https://doi.org/10.3389/feart.2024.1387809 2024-04-18T07:55:12Z East Antarctica is undergoing a noticeable decrease in precipitation, significantly impacting ice mass loss. However, there is a lack of research on the underlying factors behind this change. This study highlights that on an interannual timescale, the precipitation variations in Eastern East Antarctica (EEA) are predominantly influenced by the Indian Ocean Dipole mode (IOD) compared to other climate variabilities like the Southern Annular Mode (SAM), El Niño–Southern Oscillation (ENSO), and north Atlantic variability. Through trend analysis of each climate variability, we confirmed that the observed decrease in EEA precipitation can be attributed to positive IOD-like ocean warming. A positive SAM trend also contributed to specific Wilkes Land and Queen Mary Land regions. Despite these influence on long-term trend, the relationship between IOD and EEA precipitation exhibits sporadic changes on interdecadal timescales. Notably, the apparent negative correlation between the two declined to insignificance in the early 2000s, only to re-establish a significant negative correlation by the early 2010s. The primary driver of this change is the inconsistent propagation of waves originating from the Indian Ocean. During periods of high correlation, these waves propagate southeastward, inducing a robust low-pressure anomaly near Victoria Land, ultimately leading to decreased EEA precipitation. However, during periods of low correlation, the waves move eastward and fail to alter the circulation anomalies near East Antarctica. Article in Journal/Newspaper Antarc* Antarctica East Antarctica North Atlantic Queen Mary land Victoria Land Wilkes Land Frontiers (Publisher) East Antarctica Victoria Land Indian Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Queen Mary Land ENVELOPE(96.000,96.000,-68.000,-68.000) Frontiers in Earth Science 12 |
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General Earth and Planetary Sciences Lee, Hyun-Ju Jin, Emilia Kyung The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
topic_facet |
General Earth and Planetary Sciences |
description |
East Antarctica is undergoing a noticeable decrease in precipitation, significantly impacting ice mass loss. However, there is a lack of research on the underlying factors behind this change. This study highlights that on an interannual timescale, the precipitation variations in Eastern East Antarctica (EEA) are predominantly influenced by the Indian Ocean Dipole mode (IOD) compared to other climate variabilities like the Southern Annular Mode (SAM), El Niño–Southern Oscillation (ENSO), and north Atlantic variability. Through trend analysis of each climate variability, we confirmed that the observed decrease in EEA precipitation can be attributed to positive IOD-like ocean warming. A positive SAM trend also contributed to specific Wilkes Land and Queen Mary Land regions. Despite these influence on long-term trend, the relationship between IOD and EEA precipitation exhibits sporadic changes on interdecadal timescales. Notably, the apparent negative correlation between the two declined to insignificance in the early 2000s, only to re-establish a significant negative correlation by the early 2010s. The primary driver of this change is the inconsistent propagation of waves originating from the Indian Ocean. During periods of high correlation, these waves propagate southeastward, inducing a robust low-pressure anomaly near Victoria Land, ultimately leading to decreased EEA precipitation. However, during periods of low correlation, the waves move eastward and fail to alter the circulation anomalies near East Antarctica. |
author2 |
Ministry of Oceans and Fisheries |
format |
Article in Journal/Newspaper |
author |
Lee, Hyun-Ju Jin, Emilia Kyung |
author_facet |
Lee, Hyun-Ju Jin, Emilia Kyung |
author_sort |
Lee, Hyun-Ju |
title |
The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
title_short |
The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
title_full |
The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
title_fullStr |
The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
title_full_unstemmed |
The dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern East Antarctica |
title_sort |
dominant influence of indian ocean dipole-like ocean warming on decreased precipitation over eastern east antarctica |
publisher |
Frontiers Media SA |
publishDate |
2024 |
url |
http://dx.doi.org/10.3389/feart.2024.1387809 https://www.frontiersin.org/articles/10.3389/feart.2024.1387809/full |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(96.000,96.000,-68.000,-68.000) |
geographic |
East Antarctica Victoria Land Indian Wilkes Land Queen Mary Land |
geographic_facet |
East Antarctica Victoria Land Indian Wilkes Land Queen Mary Land |
genre |
Antarc* Antarctica East Antarctica North Atlantic Queen Mary land Victoria Land Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica North Atlantic Queen Mary land Victoria Land Wilkes Land |
op_source |
Frontiers in Earth Science volume 12 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2024.1387809 |
container_title |
Frontiers in Earth Science |
container_volume |
12 |
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1798836115426246656 |