Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis
Seesaw relationship in intensity between the surface Aleutian and Icelandic Lows (AIS) is a manifestation of atmospheric teleconnection that bridges the interannual variability over the Pacific and Atlantic in particular winter months. Analysis of the 20th Century Reanalysis data reveals that the st...
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ftdoajarticles:oai:doaj.org/article:509610f648f24212af3e85b56e9fbfdc 2023-05-15T13:14:54+02:00 Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis Ning Shi Hisashi Nakamura 2014-08-01T00:00:00Z https://doi.org/10.3402/tellusa.v66.22660 https://doaj.org/article/509610f648f24212af3e85b56e9fbfdc EN eng Stockholm University Press http://www.tellusa.net/index.php/tellusa/article/download/22660/pdf_1 https://doaj.org/toc/1600-0870 1600-0870 doi:10.3402/tellusa.v66.22660 https://doaj.org/article/509610f648f24212af3e85b56e9fbfdc Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 66, Iss 0, Pp 1-10 (2014) multi-decadal modulations AIS AO Oceanography GC1-1581 Meteorology. Climatology QC851-999 article 2014 ftdoajarticles https://doi.org/10.3402/tellusa.v66.22660 2022-12-31T00:16:49Z Seesaw relationship in intensity between the surface Aleutian and Icelandic Lows (AIS) is a manifestation of atmospheric teleconnection that bridges the interannual variability over the Pacific and Atlantic in particular winter months. Analysis of the 20th Century Reanalysis data reveals that the strength and timing of AIS have undergone multi-decadal modulations in conjunction with those in structure of the Arctic Oscillation (AO) signature, extracted in the leading mode of interannual sea-level pressure (SLP) variability over the extratropical Northern Hemisphere. Specifically, events of what may be called ‘pure AO’, in which SLP anomalies exhibit a high degree of axial symmetry in association with in-phase SLP variability between the midlatitude Atlantic and Pacific, tended to occur during multi-decadal periods in which the inter-basin teleconnection through AIS was active under the enhanced interannual variability of the Aleutian Low. In contrast, the axial symmetry of the AO pattern was apparently reduced during a multi-decadal period in which the AIS teleconnection was inactive under the weakened interannual variability of the Aleutian Low. In this period, the leading mode of interannual SLP variability represented a meridional seesaw between the Atlantic and Arctic, which resembles SLP anomaly pattern associated with the cold-ocean/warm-land (COWL) temperature pattern. These multi-decadal modulations in interannual AIS signal and the axial symmetry of the interannual AO pattern occurred under multi-decadal changes in the background state that also represented the polarity changes of the COWL-like anomaly pattern. Article in Journal/Newspaper aleutian low Arctic Directory of Open Access Journals: DOAJ Articles Arctic Pacific Tellus A: Dynamic Meteorology and Oceanography 66 1 22660 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
multi-decadal modulations AIS AO Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
spellingShingle |
multi-decadal modulations AIS AO Oceanography GC1-1581 Meteorology. Climatology QC851-999 Ning Shi Hisashi Nakamura Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
topic_facet |
multi-decadal modulations AIS AO Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
description |
Seesaw relationship in intensity between the surface Aleutian and Icelandic Lows (AIS) is a manifestation of atmospheric teleconnection that bridges the interannual variability over the Pacific and Atlantic in particular winter months. Analysis of the 20th Century Reanalysis data reveals that the strength and timing of AIS have undergone multi-decadal modulations in conjunction with those in structure of the Arctic Oscillation (AO) signature, extracted in the leading mode of interannual sea-level pressure (SLP) variability over the extratropical Northern Hemisphere. Specifically, events of what may be called ‘pure AO’, in which SLP anomalies exhibit a high degree of axial symmetry in association with in-phase SLP variability between the midlatitude Atlantic and Pacific, tended to occur during multi-decadal periods in which the inter-basin teleconnection through AIS was active under the enhanced interannual variability of the Aleutian Low. In contrast, the axial symmetry of the AO pattern was apparently reduced during a multi-decadal period in which the AIS teleconnection was inactive under the weakened interannual variability of the Aleutian Low. In this period, the leading mode of interannual SLP variability represented a meridional seesaw between the Atlantic and Arctic, which resembles SLP anomaly pattern associated with the cold-ocean/warm-land (COWL) temperature pattern. These multi-decadal modulations in interannual AIS signal and the axial symmetry of the interannual AO pattern occurred under multi-decadal changes in the background state that also represented the polarity changes of the COWL-like anomaly pattern. |
format |
Article in Journal/Newspaper |
author |
Ning Shi Hisashi Nakamura |
author_facet |
Ning Shi Hisashi Nakamura |
author_sort |
Ning Shi |
title |
Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
title_short |
Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
title_full |
Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
title_fullStr |
Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
title_full_unstemmed |
Multi-decadal modulations in the Aleutian-Icelandic Low seesaw and the axial symmetry of the Arctic Oscillation signature, as revealed in the 20th century reanalysis |
title_sort |
multi-decadal modulations in the aleutian-icelandic low seesaw and the axial symmetry of the arctic oscillation signature, as revealed in the 20th century reanalysis |
publisher |
Stockholm University Press |
publishDate |
2014 |
url |
https://doi.org/10.3402/tellusa.v66.22660 https://doaj.org/article/509610f648f24212af3e85b56e9fbfdc |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
aleutian low Arctic |
genre_facet |
aleutian low Arctic |
op_source |
Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 66, Iss 0, Pp 1-10 (2014) |
op_relation |
http://www.tellusa.net/index.php/tellusa/article/download/22660/pdf_1 https://doaj.org/toc/1600-0870 1600-0870 doi:10.3402/tellusa.v66.22660 https://doaj.org/article/509610f648f24212af3e85b56e9fbfdc |
op_doi |
https://doi.org/10.3402/tellusa.v66.22660 |
container_title |
Tellus A: Dynamic Meteorology and Oceanography |
container_volume |
66 |
container_issue |
1 |
container_start_page |
22660 |
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1766266019730423808 |