Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern
The wintertime Arctic temperature (T; surface-400 hPa) decreased from 1979 to 1997 and increased rapidly from 1998 to 2012, in contrast to the global mean surface air temperature. Here aspects of circulation variability that are associated with these temperature changes are examined using the NCEP-N...
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Language: | English |
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2017
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Online Access: | https://doi.org/10.1175/JCLI-D-15-0741.1 |
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ftncar:oai:drupal-site.org:articles_21475 2023-09-05T13:16:32+02:00 Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern Fan, Songmiao (author) Yang, Xiaosong (author) 2017-01 https://doi.org/10.1175/JCLI-D-15-0741.1 en eng Journal of Climate--J. Climate--0894-8755--1520-0442 NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2--10.7265/N55M63M1 articles:21475 ark:/85065/d73j3gn1 doi:10.1175/JCLI-D-15-0741.1 Copyright 2017 American Meteorological Society (AMS). article Text 2017 ftncar https://doi.org/10.1175/JCLI-D-15-0741.1 2023-08-14T18:48:12Z The wintertime Arctic temperature (T; surface-400 hPa) decreased from 1979 to 1997 and increased rapidly from 1998 to 2012, in contrast to the global mean surface air temperature. Here aspects of circulation variability that are associated with these temperature changes are examined using the NCEP-NCAR reanalysis and ERA-Interim products. It is found that the Nordic-Siberia seesaw of meridional winds near 70 degrees N is associated with two-thirds of the variance of the Arctic winter mean T, possibly contributing to the cooling and warming trends. It is suggested here that the seesaw accounts for much of the difference in Arctic amplification between observations and climate models. Growth of sea ice in winter is hindered by southerly winds over the Nordic region (0 degrees-60 degrees E). Through modulation of the wind seesaw, the eastern Atlantic (EA) pattern is found to be significantly associated with Arctic and East Asia winter climate variations. In one phase of the EA pattern, a midlatitude North Atlantic ridge anomaly is associated with a poleward shift of the mean storm track, a weakened eddy-driven jet over Eurasia, and above-normal sea level pressure (SLP) over Siberia, most significantly in the region to the northwest of Lake Baikal. The EA pattern is associated with two-thirds of the variance of winter-average SLP over Siberia. Article in Journal/Newspaper Arctic North Atlantic Sea ice Siberia OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Journal of Climate 30 2 573 583 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The wintertime Arctic temperature (T; surface-400 hPa) decreased from 1979 to 1997 and increased rapidly from 1998 to 2012, in contrast to the global mean surface air temperature. Here aspects of circulation variability that are associated with these temperature changes are examined using the NCEP-NCAR reanalysis and ERA-Interim products. It is found that the Nordic-Siberia seesaw of meridional winds near 70 degrees N is associated with two-thirds of the variance of the Arctic winter mean T, possibly contributing to the cooling and warming trends. It is suggested here that the seesaw accounts for much of the difference in Arctic amplification between observations and climate models. Growth of sea ice in winter is hindered by southerly winds over the Nordic region (0 degrees-60 degrees E). Through modulation of the wind seesaw, the eastern Atlantic (EA) pattern is found to be significantly associated with Arctic and East Asia winter climate variations. In one phase of the EA pattern, a midlatitude North Atlantic ridge anomaly is associated with a poleward shift of the mean storm track, a weakened eddy-driven jet over Eurasia, and above-normal sea level pressure (SLP) over Siberia, most significantly in the region to the northwest of Lake Baikal. The EA pattern is associated with two-thirds of the variance of winter-average SLP over Siberia. |
author2 |
Fan, Songmiao (author) Yang, Xiaosong (author) |
format |
Article in Journal/Newspaper |
title |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
spellingShingle |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
title_short |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
title_full |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
title_fullStr |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
title_full_unstemmed |
Arctic and east Asia winter climate variations associated with the eastern Atlantic pattern |
title_sort |
arctic and east asia winter climate variations associated with the eastern atlantic pattern |
publishDate |
2017 |
url |
https://doi.org/10.1175/JCLI-D-15-0741.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic Sea ice Siberia |
genre_facet |
Arctic North Atlantic Sea ice Siberia |
op_relation |
Journal of Climate--J. Climate--0894-8755--1520-0442 NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2--10.7265/N55M63M1 articles:21475 ark:/85065/d73j3gn1 doi:10.1175/JCLI-D-15-0741.1 |
op_rights |
Copyright 2017 American Meteorological Society (AMS). |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0741.1 |
container_title |
Journal of Climate |
container_volume |
30 |
container_issue |
2 |
container_start_page |
573 |
op_container_end_page |
583 |
_version_ |
1776198074455031808 |