Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer
Besides its negative trend, the interannual and the interdecadal changes in the Arctic sea ice have also been pronounced in recent decades. The three leading modes in the sea level pressure (SLP) variability in the Arctic (70–90 ∘ N) – the Arctic Oscillation (AO), the Arctic Dipole (AD), and the thi...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2019
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-13-3007-2019 https://doaj.org/article/029020735e1846e2aca8ff5c75d59e2a |
id |
ftdoajarticles:oai:doaj.org/article:029020735e1846e2aca8ff5c75d59e2a |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:029020735e1846e2aca8ff5c75d59e2a 2023-05-15T13:10:51+02:00 Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer N. Choi K.-M. Kim Y.-K. Lim M.-I. Lee 2019-11-01T00:00:00Z https://doi.org/10.5194/tc-13-3007-2019 https://doaj.org/article/029020735e1846e2aca8ff5c75d59e2a EN eng Copernicus Publications https://www.the-cryosphere.net/13/3007/2019/tc-13-3007-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-3007-2019 1994-0416 1994-0424 https://doaj.org/article/029020735e1846e2aca8ff5c75d59e2a The Cryosphere, Vol 13, Pp 3007-3021 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-3007-2019 2022-12-31T00:33:51Z Besides its negative trend, the interannual and the interdecadal changes in the Arctic sea ice have also been pronounced in recent decades. The three leading modes in the sea level pressure (SLP) variability in the Arctic (70–90 ∘ N) – the Arctic Oscillation (AO), the Arctic Dipole (AD), and the third mode (A3) – are analyzed to understand the linkage between sea ice variability and large-scale atmospheric circulation in boreal summer (June–August). This study also compares the decadal changes of the modes between the early (1982–1997) and the recent (1998–2017) periods and their influences on the Arctic sea ice extent (SIE). Only the AD mode shows a significant correlation increase with SIE in summer (JJA) from −0.05 in the early period to 0.57 in the recent period. The AO and the A3 modes show a less significant relationship with SIE for the two periods. The AD is characterized by a dipole pattern of SLP, which modulates the strength of meridional surface winds and the Transpolar Drift Stream (TDS). The major circulation change in the late 1990s is that the direction of the wind has been changed more meridionally over the exit region of the Fram Strait, which causes sea ice drift and discharge through that region. In addition, the response of surface albedo and the net surface heat flux becomes larger and much clearer, suggesting a positive sea-ice–albedo feedback in the sea ice variability associated with the AD. The analysis also reveals that the zonal shift of the centers of SLP anomalies and associated circulation change affects a significant reduction in sea ice concentration over the Pacific sector of the Arctic Ocean. This study further suggests that the Pacific Decadal Oscillation (PDO) phase change could influence the spatial pattern change in the AD. Article in Journal/Newspaper albedo Arctic Arctic Ocean Fram Strait Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Pacific The Cryosphere 13 11 3007 3021 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 N. Choi K.-M. Kim Y.-K. Lim M.-I. Lee Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Besides its negative trend, the interannual and the interdecadal changes in the Arctic sea ice have also been pronounced in recent decades. The three leading modes in the sea level pressure (SLP) variability in the Arctic (70–90 ∘ N) – the Arctic Oscillation (AO), the Arctic Dipole (AD), and the third mode (A3) – are analyzed to understand the linkage between sea ice variability and large-scale atmospheric circulation in boreal summer (June–August). This study also compares the decadal changes of the modes between the early (1982–1997) and the recent (1998–2017) periods and their influences on the Arctic sea ice extent (SIE). Only the AD mode shows a significant correlation increase with SIE in summer (JJA) from −0.05 in the early period to 0.57 in the recent period. The AO and the A3 modes show a less significant relationship with SIE for the two periods. The AD is characterized by a dipole pattern of SLP, which modulates the strength of meridional surface winds and the Transpolar Drift Stream (TDS). The major circulation change in the late 1990s is that the direction of the wind has been changed more meridionally over the exit region of the Fram Strait, which causes sea ice drift and discharge through that region. In addition, the response of surface albedo and the net surface heat flux becomes larger and much clearer, suggesting a positive sea-ice–albedo feedback in the sea ice variability associated with the AD. The analysis also reveals that the zonal shift of the centers of SLP anomalies and associated circulation change affects a significant reduction in sea ice concentration over the Pacific sector of the Arctic Ocean. This study further suggests that the Pacific Decadal Oscillation (PDO) phase change could influence the spatial pattern change in the AD. |
format |
Article in Journal/Newspaper |
author |
N. Choi K.-M. Kim Y.-K. Lim M.-I. Lee |
author_facet |
N. Choi K.-M. Kim Y.-K. Lim M.-I. Lee |
author_sort |
N. Choi |
title |
Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
title_short |
Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
title_full |
Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
title_fullStr |
Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
title_full_unstemmed |
Decadal changes in the leading patterns of sea level pressure in the Arctic and their impacts on the sea ice variability in boreal summer |
title_sort |
decadal changes in the leading patterns of sea level pressure in the arctic and their impacts on the sea ice variability in boreal summer |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-3007-2019 https://doaj.org/article/029020735e1846e2aca8ff5c75d59e2a |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
albedo Arctic Arctic Ocean Fram Strait Sea ice The Cryosphere |
genre_facet |
albedo Arctic Arctic Ocean Fram Strait Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 3007-3021 (2019) |
op_relation |
https://www.the-cryosphere.net/13/3007/2019/tc-13-3007-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-3007-2019 1994-0416 1994-0424 https://doaj.org/article/029020735e1846e2aca8ff5c75d59e2a |
op_doi |
https://doi.org/10.5194/tc-13-3007-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
11 |
container_start_page |
3007 |
op_container_end_page |
3021 |
_version_ |
1766244982631432192 |