Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes
Changes in precipitation extremes over West Antarctica and the Antarctic Peninsula belong to the observed consequences of current climate change. We discuss the spatio-temporal patterns of extreme precipitation and their relationships with the Amundsen Sea Low (ASL) parameters. Based on the ERA5 rea...
Published in: | Ukrainian Antarctic Journal |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English Ukrainian |
Published: |
State Institution National Antarctic Scientific Center
2023
|
Subjects: | |
Online Access: | https://doi.org/10.33275/1727-7485.2.2023.716 https://doaj.org/article/88b307d760cc422a8a040556ca2aeb32 |
id |
ftdoajarticles:oai:doaj.org/article:88b307d760cc422a8a040556ca2aeb32 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:88b307d760cc422a8a040556ca2aeb32 2024-09-15T17:34:18+00:00 Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes L. Pysarenko D. Pishniak M. Savenets 2023-12-01T00:00:00Z https://doi.org/10.33275/1727-7485.2.2023.716 https://doaj.org/article/88b307d760cc422a8a040556ca2aeb32 EN UK eng ukr State Institution National Antarctic Scientific Center http://uaj.uac.gov.ua/index.php/uaj/article/view/748 https://doaj.org/toc/1727-7485 https://doaj.org/toc/2415-3087 1727-7485 2415-3087 doi:10.33275/1727-7485.2.2023.716 https://doaj.org/article/88b307d760cc422a8a040556ca2aeb32 Український антарктичний журнал, Vol 21, Iss 2(27), Pp 175-189 (2023) atmospheric pressure glacier basin ice shelf precipitation 95th percentile of precipitation Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.33275/1727-7485.2.2023.716 2024-08-05T17:49:40Z Changes in precipitation extremes over West Antarctica and the Antarctic Peninsula belong to the observed consequences of current climate change. We discuss the spatio-temporal patterns of extreme precipitation and their relationships with the Amundsen Sea Low (ASL) parameters. Based on the ERA5 reanalysis data, the 95th percentile of daily precipitation totals was estimated and linked to the ASL parameters over the main glacier basins in the region. The 95th percentile of precipitation varied from 5 mm to over 40 mm over the region, showing higher values along the coastline and reaching the maximum over the west coast of the Antarctic Peninsula. The tendencies of extreme precipitation vary from –3 to 4 mm per decade and enhance the observed spatial distribution differences. On average, extreme precipitation events covered 4.7–4.9% of the basins’ area. All dependencies had a well-detected seasonality. Both total and extreme precipitation varied under the ASL fluctuations, showing significant average-to-strong correlations. The ASL shifts to the west caused a decrease in precipitation over the Amundsen Sea and an increase over the Antarctic Peninsula. The ASL deepening (lower atmospheric pressure of the system) resulted in a precipitation decrease over the Getz Ice Shelf and a precipitation increase over the western part of the Antarctic Peninsula. There are two regions with opposite responses of precipitation to the ASL changes: the western part over the Getz Ice Shelf with nearby marine areas, and the eastern part covering the Antarctic Peninsula, Pine Island glaciers, the Abbot Ice Shelf, and the Bellingshausen Sea. The obtained results are crucial for our understanding of extreme precipitation occurrences over West Antarctica in recent decades under climate change. Article in Journal/Newspaper Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Getz Ice Shelf Ice Shelf Pine Island West Antarctica Directory of Open Access Journals: DOAJ Articles Ukrainian Antarctic Journal 21 2(27) 175 189 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Ukrainian |
topic |
atmospheric pressure glacier basin ice shelf precipitation 95th percentile of precipitation Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
atmospheric pressure glacier basin ice shelf precipitation 95th percentile of precipitation Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 L. Pysarenko D. Pishniak M. Savenets Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
topic_facet |
atmospheric pressure glacier basin ice shelf precipitation 95th percentile of precipitation Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
Changes in precipitation extremes over West Antarctica and the Antarctic Peninsula belong to the observed consequences of current climate change. We discuss the spatio-temporal patterns of extreme precipitation and their relationships with the Amundsen Sea Low (ASL) parameters. Based on the ERA5 reanalysis data, the 95th percentile of daily precipitation totals was estimated and linked to the ASL parameters over the main glacier basins in the region. The 95th percentile of precipitation varied from 5 mm to over 40 mm over the region, showing higher values along the coastline and reaching the maximum over the west coast of the Antarctic Peninsula. The tendencies of extreme precipitation vary from –3 to 4 mm per decade and enhance the observed spatial distribution differences. On average, extreme precipitation events covered 4.7–4.9% of the basins’ area. All dependencies had a well-detected seasonality. Both total and extreme precipitation varied under the ASL fluctuations, showing significant average-to-strong correlations. The ASL shifts to the west caused a decrease in precipitation over the Amundsen Sea and an increase over the Antarctic Peninsula. The ASL deepening (lower atmospheric pressure of the system) resulted in a precipitation decrease over the Getz Ice Shelf and a precipitation increase over the western part of the Antarctic Peninsula. There are two regions with opposite responses of precipitation to the ASL changes: the western part over the Getz Ice Shelf with nearby marine areas, and the eastern part covering the Antarctic Peninsula, Pine Island glaciers, the Abbot Ice Shelf, and the Bellingshausen Sea. The obtained results are crucial for our understanding of extreme precipitation occurrences over West Antarctica in recent decades under climate change. |
format |
Article in Journal/Newspaper |
author |
L. Pysarenko D. Pishniak M. Savenets |
author_facet |
L. Pysarenko D. Pishniak M. Savenets |
author_sort |
L. Pysarenko |
title |
Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
title_short |
Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
title_full |
Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
title_fullStr |
Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
title_full_unstemmed |
Variability of extreme precipitation in West Antarctica and its response to the Amundsen Sea Low changes |
title_sort |
variability of extreme precipitation in west antarctica and its response to the amundsen sea low changes |
publisher |
State Institution National Antarctic Scientific Center |
publishDate |
2023 |
url |
https://doi.org/10.33275/1727-7485.2.2023.716 https://doaj.org/article/88b307d760cc422a8a040556ca2aeb32 |
genre |
Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Getz Ice Shelf Ice Shelf Pine Island West Antarctica |
genre_facet |
Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Getz Ice Shelf Ice Shelf Pine Island West Antarctica |
op_source |
Український антарктичний журнал, Vol 21, Iss 2(27), Pp 175-189 (2023) |
op_relation |
http://uaj.uac.gov.ua/index.php/uaj/article/view/748 https://doaj.org/toc/1727-7485 https://doaj.org/toc/2415-3087 1727-7485 2415-3087 doi:10.33275/1727-7485.2.2023.716 https://doaj.org/article/88b307d760cc422a8a040556ca2aeb32 |
op_doi |
https://doi.org/10.33275/1727-7485.2.2023.716 |
container_title |
Ukrainian Antarctic Journal |
container_volume |
21 |
container_issue |
2(27) |
container_start_page |
175 |
op_container_end_page |
189 |
_version_ |
1810451665705238528 |