October circulation precursors of the wintertime Arctic Oscillation
ABSTRACT Investigation into atmospheric processes preceding winters of different Arctic Oscillation index ( AOI ) polarity, based on empirical data analysis, has revealed highly statistically significant relationships between the wintertime AOI and preceding October circulation. The wintertime AOI s...
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crwiley:10.1002/joc.3968 2024-06-02T08:01:07+00:00 October circulation precursors of the wintertime Arctic Oscillation Kryjov, Vladimir N. 2014 http://dx.doi.org/10.1002/joc.3968 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3968 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3968 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 35, issue 2, page 161-171 ISSN 0899-8418 1097-0088 journal-article 2014 crwiley https://doi.org/10.1002/joc.3968 2024-05-03T11:12:11Z ABSTRACT Investigation into atmospheric processes preceding winters of different Arctic Oscillation index ( AOI ) polarity, based on empirical data analysis, has revealed highly statistically significant relationships between the wintertime AOI and preceding October circulation. The wintertime AOI strongly covaries with an October circulation anomaly barotropically spanning the depth of the troposphere over the Taymyr Peninsula (Taymyr circulation anomaly, TCA ), with the anticyclonic (cyclonic) TCA preceding winters of the negative (positive) AOI polarity. The October TCA affects the wintertime AOI polarity mainly via its impact on air temperature over the Arctic and North‐East Asia. Anticyclonic (cyclonic) TCA leads to the positive (negative) temperature anomaly over the Arctic and a corresponding increase (decrease) of geopotential heights, and to the negative (positive) temperature anomaly over North‐East Asia and so to enhancement (weakening) of the climatological trough associated with long planetary waves and corresponding enhancement (weakening) of the upward wave activity flux. To characterize temporal variability of the TCA , a Taymyr circulation index ( TCI ) is suggested. Correlation coefficient between the (inverted) wintertime AOI and the October TCI is 0.58 for the 1958–2012 period, with correlations being stable in time. The anticyclonic (cyclonic) TCA is associated with smaller (larger) number of cyclones coming to the region of the eastern Barents Sea–Taymyr Peninsula–Laptev Sea. Statistical relationships between the October TCA , wintertime AOI and September/October sea surface temperature in the northern Barents Sea are shown. Article in Journal/Newspaper Arctic Barents Sea laptev Laptev Sea Taymyr Taymyr Peninsula Wiley Online Library Arctic Barents Sea Laptev Sea Taymyr ENVELOPE(89.987,89.987,68.219,68.219) International Journal of Climatology 35 2 161 171 |
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Wiley Online Library |
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English |
description |
ABSTRACT Investigation into atmospheric processes preceding winters of different Arctic Oscillation index ( AOI ) polarity, based on empirical data analysis, has revealed highly statistically significant relationships between the wintertime AOI and preceding October circulation. The wintertime AOI strongly covaries with an October circulation anomaly barotropically spanning the depth of the troposphere over the Taymyr Peninsula (Taymyr circulation anomaly, TCA ), with the anticyclonic (cyclonic) TCA preceding winters of the negative (positive) AOI polarity. The October TCA affects the wintertime AOI polarity mainly via its impact on air temperature over the Arctic and North‐East Asia. Anticyclonic (cyclonic) TCA leads to the positive (negative) temperature anomaly over the Arctic and a corresponding increase (decrease) of geopotential heights, and to the negative (positive) temperature anomaly over North‐East Asia and so to enhancement (weakening) of the climatological trough associated with long planetary waves and corresponding enhancement (weakening) of the upward wave activity flux. To characterize temporal variability of the TCA , a Taymyr circulation index ( TCI ) is suggested. Correlation coefficient between the (inverted) wintertime AOI and the October TCI is 0.58 for the 1958–2012 period, with correlations being stable in time. The anticyclonic (cyclonic) TCA is associated with smaller (larger) number of cyclones coming to the region of the eastern Barents Sea–Taymyr Peninsula–Laptev Sea. Statistical relationships between the October TCA , wintertime AOI and September/October sea surface temperature in the northern Barents Sea are shown. |
format |
Article in Journal/Newspaper |
author |
Kryjov, Vladimir N. |
spellingShingle |
Kryjov, Vladimir N. October circulation precursors of the wintertime Arctic Oscillation |
author_facet |
Kryjov, Vladimir N. |
author_sort |
Kryjov, Vladimir N. |
title |
October circulation precursors of the wintertime Arctic Oscillation |
title_short |
October circulation precursors of the wintertime Arctic Oscillation |
title_full |
October circulation precursors of the wintertime Arctic Oscillation |
title_fullStr |
October circulation precursors of the wintertime Arctic Oscillation |
title_full_unstemmed |
October circulation precursors of the wintertime Arctic Oscillation |
title_sort |
october circulation precursors of the wintertime arctic oscillation |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1002/joc.3968 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3968 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3968 |
long_lat |
ENVELOPE(89.987,89.987,68.219,68.219) |
geographic |
Arctic Barents Sea Laptev Sea Taymyr |
geographic_facet |
Arctic Barents Sea Laptev Sea Taymyr |
genre |
Arctic Barents Sea laptev Laptev Sea Taymyr Taymyr Peninsula |
genre_facet |
Arctic Barents Sea laptev Laptev Sea Taymyr Taymyr Peninsula |
op_source |
International Journal of Climatology volume 35, issue 2, page 161-171 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.3968 |
container_title |
International Journal of Climatology |
container_volume |
35 |
container_issue |
2 |
container_start_page |
161 |
op_container_end_page |
171 |
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1800745378265432064 |