Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays
Abstract Tropical cyclone (TC) genesis over the western North Pacific (WNP) in the TC active season July–October after El Niño peaks in the preceding December is revealed to be either deficient or excessive, depending on how El Niño is able to remotely create and maintain sea‐surface temperature (SS...
Published in: | Quarterly Journal of the Royal Meteorological Society |
---|---|
Main Authors: | , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4042 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 |
id |
crwiley:10.1002/qj.4042 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/qj.4042 2024-06-23T07:54:54+00:00 Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays Yu, Jin‐Hua Ou, Lijian Chen, Lin Li, Laurent Sun, Ming Zhong, Xiaoyao Zhang, Xuyu National Natural Science Foundation of China 2021 http://dx.doi.org/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4042 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 147, issue 737, page 2580-2596 ISSN 0035-9009 1477-870X journal-article 2021 crwiley https://doi.org/10.1002/qj.4042 2024-06-04T06:42:08Z Abstract Tropical cyclone (TC) genesis over the western North Pacific (WNP) in the TC active season July–October after El Niño peaks in the preceding December is revealed to be either deficient or excessive, depending on how El Niño is able to remotely create and maintain sea‐surface temperature (SST) anomalies in the North Atlantic and Indian Ocean during spring while El Niño decays. A reduction of TC genesis (Group 1) is coincident with a warming in the Indian Ocean and a positive tripolar SST pattern in the North Atlantic, while enhanced TC genesis (Group 2) corresponds to the configuration without significant SST anomalies in the North Atlantic and in the Indian Ocean. Relevant physical mechanisms are investigated through observational data analysis and confirmed with model simulations. In Group 1, El Niño SST anomalies enhance convection over the central‐eastern equatorial Pacific. The related latent heat release excites Rossby wave trains which can efficiently propagate energy from the eastern tropical Pacific into Central America and further into the subtropical North Atlantic. The warm SST anomalies found in the Indian Ocean and in the North Atlantic can force robust anomalous easterlies in the tropical WNP, producing unfavourable dynamic and thermodynamic conditions for TC genesis. Group 2 shows a quite distinct situation. Actually, the late winter anomalous westerlies are much weaker over Central America in Group 2, providing a configuration of inhibition for an efficient wave energy propagation from the tropics into the subtropical North Atlantic. The warm SST over the Maritime Continent is then responsible for the increase of TC genesis over the South China Sea and around the Philippines by exciting a cyclonic circulation in the TC active season. Article in Journal/Newspaper North Atlantic Wiley Online Library Indian Pacific Quarterly Journal of the Royal Meteorological Society 147 737 2580 2596 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Tropical cyclone (TC) genesis over the western North Pacific (WNP) in the TC active season July–October after El Niño peaks in the preceding December is revealed to be either deficient or excessive, depending on how El Niño is able to remotely create and maintain sea‐surface temperature (SST) anomalies in the North Atlantic and Indian Ocean during spring while El Niño decays. A reduction of TC genesis (Group 1) is coincident with a warming in the Indian Ocean and a positive tripolar SST pattern in the North Atlantic, while enhanced TC genesis (Group 2) corresponds to the configuration without significant SST anomalies in the North Atlantic and in the Indian Ocean. Relevant physical mechanisms are investigated through observational data analysis and confirmed with model simulations. In Group 1, El Niño SST anomalies enhance convection over the central‐eastern equatorial Pacific. The related latent heat release excites Rossby wave trains which can efficiently propagate energy from the eastern tropical Pacific into Central America and further into the subtropical North Atlantic. The warm SST anomalies found in the Indian Ocean and in the North Atlantic can force robust anomalous easterlies in the tropical WNP, producing unfavourable dynamic and thermodynamic conditions for TC genesis. Group 2 shows a quite distinct situation. Actually, the late winter anomalous westerlies are much weaker over Central America in Group 2, providing a configuration of inhibition for an efficient wave energy propagation from the tropics into the subtropical North Atlantic. The warm SST over the Maritime Continent is then responsible for the increase of TC genesis over the South China Sea and around the Philippines by exciting a cyclonic circulation in the TC active season. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Yu, Jin‐Hua Ou, Lijian Chen, Lin Li, Laurent Sun, Ming Zhong, Xiaoyao Zhang, Xuyu |
spellingShingle |
Yu, Jin‐Hua Ou, Lijian Chen, Lin Li, Laurent Sun, Ming Zhong, Xiaoyao Zhang, Xuyu Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
author_facet |
Yu, Jin‐Hua Ou, Lijian Chen, Lin Li, Laurent Sun, Ming Zhong, Xiaoyao Zhang, Xuyu |
author_sort |
Yu, Jin‐Hua |
title |
Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
title_short |
Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
title_full |
Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
title_fullStr |
Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
title_full_unstemmed |
Tropical cyclone genesis over the western North Pacific impacted by SST anomalies from other basins while El Niño decays |
title_sort |
tropical cyclone genesis over the western north pacific impacted by sst anomalies from other basins while el niño decays |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4042 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4042 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 147, issue 737, page 2580-2596 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.4042 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
147 |
container_issue |
737 |
container_start_page |
2580 |
op_container_end_page |
2596 |
_version_ |
1802647234214363136 |