Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño
This study demonstrates the close connection between the north-south dipole pattern of sea level pressure anomalies over northeastern North America to the western tropical North Atlantic, referred to as the North American dipole (NAD), and the central Pacific (CP)-type El Nino a year later. In contr...
Published in: | Climate Dynamics |
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Language: | English |
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2017
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Online Access: | https://doi.org/10.1007/s00382-016-3389-8 |
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ftncar:oai:drupal-site.org:articles_20954 2023-09-05T13:21:36+02:00 Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño Ding, Ruiqiang (author) Li, Jianping (author) Tseng, Yu-heng (author) Sun, Cheng (author) Zheng, Fei (author) 2017-08 https://doi.org/10.1007/s00382-016-3389-8 en eng Climate Dynamics--Clim Dyn--0930-7575--1432-0894 articles:20954 ark:/85065/d7k93b0s doi:10.1007/s00382-016-3389-8 Copyright 2017 Springer. article Text 2017 ftncar https://doi.org/10.1007/s00382-016-3389-8 2023-08-14T18:45:59Z This study demonstrates the close connection between the north-south dipole pattern of sea level pressure anomalies over northeastern North America to the western tropical North Atlantic, referred to as the North American dipole (NAD), and the central Pacific (CP)-type El Nino a year later. In contrast to other ENSO precursors, such as the North Pacific Oscillation (NPO) and Pacific-North America (PNA) pattern, the NAD appears more closely related to the CP-type El Nino than to the eastern Pacific (EP)-type El Nino, indicating that the NAD may serve as a unique precursor for the CP El Nino. The wintertime NAD induces sea surface temperature anomalies in the northern tropical Atlantic (NTA), which subsequently play an important role in developing the CP El Nino-like pattern in the tropical Pacific over the course of the following year. It appears that the NAD influence on CP El Nino involves air-sea interaction over several major basins, including the subtropical/tropical Pacific and the NTA. Additional analysis indicates that the correlation either the NAD index or the NPO index with the CP El Nino state a year later depends on the status of the other index. When the wintertime NAD index is of the opposite sign to the simultaneous NPO index, the correlation of the NAD or NPO index with the Nino4 index becomes much weaker. Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific Climate Dynamics 49 4 1321 1339 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
This study demonstrates the close connection between the north-south dipole pattern of sea level pressure anomalies over northeastern North America to the western tropical North Atlantic, referred to as the North American dipole (NAD), and the central Pacific (CP)-type El Nino a year later. In contrast to other ENSO precursors, such as the North Pacific Oscillation (NPO) and Pacific-North America (PNA) pattern, the NAD appears more closely related to the CP-type El Nino than to the eastern Pacific (EP)-type El Nino, indicating that the NAD may serve as a unique precursor for the CP El Nino. The wintertime NAD induces sea surface temperature anomalies in the northern tropical Atlantic (NTA), which subsequently play an important role in developing the CP El Nino-like pattern in the tropical Pacific over the course of the following year. It appears that the NAD influence on CP El Nino involves air-sea interaction over several major basins, including the subtropical/tropical Pacific and the NTA. Additional analysis indicates that the correlation either the NAD index or the NPO index with the CP El Nino state a year later depends on the status of the other index. When the wintertime NAD index is of the opposite sign to the simultaneous NPO index, the correlation of the NAD or NPO index with the Nino4 index becomes much weaker. |
author2 |
Ding, Ruiqiang (author) Li, Jianping (author) Tseng, Yu-heng (author) Sun, Cheng (author) Zheng, Fei (author) |
format |
Article in Journal/Newspaper |
title |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
spellingShingle |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
title_short |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
title_full |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
title_fullStr |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
title_full_unstemmed |
Linking a sea level pressure anomaly dipole over North America to the central Pacific El Niño |
title_sort |
linking a sea level pressure anomaly dipole over north america to the central pacific el niño |
publishDate |
2017 |
url |
https://doi.org/10.1007/s00382-016-3389-8 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Climate Dynamics--Clim Dyn--0930-7575--1432-0894 articles:20954 ark:/85065/d7k93b0s doi:10.1007/s00382-016-3389-8 |
op_rights |
Copyright 2017 Springer. |
op_doi |
https://doi.org/10.1007/s00382-016-3389-8 |
container_title |
Climate Dynamics |
container_volume |
49 |
container_issue |
4 |
container_start_page |
1321 |
op_container_end_page |
1339 |
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1776202191520923648 |