Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST
Winter North Atlantic Oscillation (NAO) indexes from observations based on various winter durations are compared. Results show that there are significant differences in the interannual and decadal variations of these NAO indexes. For the same data source, a different definition of winter duration ca...
Published in: | Atmospheric and Oceanic Science Letters |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
KeAi Communications Co., Ltd.
2019
|
Subjects: | |
Online Access: | https://doi.org/10.1080/16742834.2019.1628607 https://doaj.org/article/cb594808d1224ecaa1252356e1421038 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:cb594808d1224ecaa1252356e1421038 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:cb594808d1224ecaa1252356e1421038 2023-05-15T17:34:39+02:00 Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST Yujie JING Yangchun LI Yongfu XU Guangzhou FAN 2019-09-01 https://doi.org/10.1080/16742834.2019.1628607 https://doaj.org/article/cb594808d1224ecaa1252356e1421038 en eng KeAi Communications Co., Ltd. 1674-2834 2376-6123 doi:10.1080/16742834.2019.1628607 https://doaj.org/article/cb594808d1224ecaa1252356e1421038 undefined Atmospheric and Oceanic Science Letters, Vol 12, Iss 5, Pp 320-328 (2019) NAO index winter duration period action centers sea surface temperature anthro-se envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.1080/16742834.2019.1628607 2023-01-22T16:43:33Z Winter North Atlantic Oscillation (NAO) indexes from observations based on various winter durations are compared. Results show that there are significant differences in the interannual and decadal variations of these NAO indexes. For the same data source, a different definition of winter duration can lead to different signs of NAO index in some years, which mainly appear to be in the period of decadal phase transition. The different winter durations induce different cycles of the observation-based NAO. The longer the winter duration, the stronger the decadal variation. The NAO defined by different winter durations also can generate different descriptions of the NAO action centers, including the position and movement. The longer the winter duration, the more southerly action centers appear to be. The movement of the action centers affects not only site-based NAO indexes but also those defined by other methods, such as empirical orthogonal function (EOF) analysis. The length of time used in EOF analysis has a great influence on the spatial pattern of the NAO mode, which results in a considerable difference between the corresponding NAO indexes. Regardless of which NAO index is used, the NAO-related SST anomalies show the same tripole pattern. The longer the winter duration, the more significant the relationship between the NAO and SST affected by the timescale of sea–air interaction. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Unknown Atmospheric and Oceanic Science Letters 12 5 320 328 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
NAO index winter duration period action centers sea surface temperature anthro-se envir |
spellingShingle |
NAO index winter duration period action centers sea surface temperature anthro-se envir Yujie JING Yangchun LI Yongfu XU Guangzhou FAN Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
topic_facet |
NAO index winter duration period action centers sea surface temperature anthro-se envir |
description |
Winter North Atlantic Oscillation (NAO) indexes from observations based on various winter durations are compared. Results show that there are significant differences in the interannual and decadal variations of these NAO indexes. For the same data source, a different definition of winter duration can lead to different signs of NAO index in some years, which mainly appear to be in the period of decadal phase transition. The different winter durations induce different cycles of the observation-based NAO. The longer the winter duration, the stronger the decadal variation. The NAO defined by different winter durations also can generate different descriptions of the NAO action centers, including the position and movement. The longer the winter duration, the more southerly action centers appear to be. The movement of the action centers affects not only site-based NAO indexes but also those defined by other methods, such as empirical orthogonal function (EOF) analysis. The length of time used in EOF analysis has a great influence on the spatial pattern of the NAO mode, which results in a considerable difference between the corresponding NAO indexes. Regardless of which NAO index is used, the NAO-related SST anomalies show the same tripole pattern. The longer the winter duration, the more significant the relationship between the NAO and SST affected by the timescale of sea–air interaction. |
format |
Article in Journal/Newspaper |
author |
Yujie JING Yangchun LI Yongfu XU Guangzhou FAN |
author_facet |
Yujie JING Yangchun LI Yongfu XU Guangzhou FAN |
author_sort |
Yujie JING |
title |
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
title_short |
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
title_full |
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
title_fullStr |
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
title_full_unstemmed |
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST |
title_sort |
influences of different definitions of the winter nao index on nao action centers and its relationship with sst |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2019 |
url |
https://doi.org/10.1080/16742834.2019.1628607 https://doaj.org/article/cb594808d1224ecaa1252356e1421038 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Atmospheric and Oceanic Science Letters, Vol 12, Iss 5, Pp 320-328 (2019) |
op_relation |
1674-2834 2376-6123 doi:10.1080/16742834.2019.1628607 https://doaj.org/article/cb594808d1224ecaa1252356e1421038 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/16742834.2019.1628607 |
container_title |
Atmospheric and Oceanic Science Letters |
container_volume |
12 |
container_issue |
5 |
container_start_page |
320 |
op_container_end_page |
328 |
_version_ |
1766133547012194304 |