The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn
Based on the observational evidences that the tropical cyclones (TCs) number in the western North Pacific (WNP) in autumn is more than that in summer, this study mainly compares the disturbance of some conditions that associated with the formation of TCs between the two seasons. Results show that th...
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doaj-32597fa986f345fab340100c2f3ef4dd2020-11-25T04:00:16ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632020-11-01810.3389/feart.2020.597912597912The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and AutumnJia Liu0Zhifan Chen1Jiang Li2Key Laboratory of Meteorological Disaster, Ministry of Education, and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education, and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, ChinaChongqing Meteorological Information and Technical Support Center, Chongqing, ChinaBased on the observational evidences that the tropical cyclones (TCs) number in the western North Pacific (WNP) in autumn is more than that in summer, this study mainly compares the disturbance of some conditions that associated with the formation of TCs between the two seasons. Results show that the most of the distributions of the disturbance field of atmospheric dynamic factor are similar, while the unique feature of the upper level geopotential height/vortex anomaly over east Asia/western Pacific sector varies greatly and may play the important role in generating more TCs in autumn. Further analyses indicate that the high-pressure/anticyclonic anomaly in autumn is originated from the north tropical Atlantic Ocean. When a cold sea surface temperature (SST) anomaly appears in north tropical Atlantic, a Rossby wave train over Eurasia continent could be induced which then leads a favorable condition for TC genesis over east Asia/western Pacific sector at upper troposphere, resulting in more WNP TCs in autumn.https://www.frontiersin.org/articles/10.3389/feart.2020.597912/fullseasonal differencewestern North Pacificnorth tropical Atlantic sea surface temperatureRossby wave traintropical cyclone number |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jia Liu Zhifan Chen Jiang Li |
spellingShingle |
Jia Liu Zhifan Chen Jiang Li The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn Frontiers in Earth Science seasonal difference western North Pacific north tropical Atlantic sea surface temperature Rossby wave train tropical cyclone number |
author_facet |
Jia Liu Zhifan Chen Jiang Li |
author_sort |
Jia Liu |
title |
The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn |
title_short |
The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn |
title_full |
The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn |
title_fullStr |
The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn |
title_full_unstemmed |
The Comparison of the Tropical Cyclone Number Over the Western North Pacific Between Summer and Autumn |
title_sort |
comparison of the tropical cyclone number over the western north pacific between summer and autumn |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Earth Science |
issn |
2296-6463 |
publishDate |
2020-11-01 |
description |
Based on the observational evidences that the tropical cyclones (TCs) number in the western North Pacific (WNP) in autumn is more than that in summer, this study mainly compares the disturbance of some conditions that associated with the formation of TCs between the two seasons. Results show that the most of the distributions of the disturbance field of atmospheric dynamic factor are similar, while the unique feature of the upper level geopotential height/vortex anomaly over east Asia/western Pacific sector varies greatly and may play the important role in generating more TCs in autumn. Further analyses indicate that the high-pressure/anticyclonic anomaly in autumn is originated from the north tropical Atlantic Ocean. When a cold sea surface temperature (SST) anomaly appears in north tropical Atlantic, a Rossby wave train over Eurasia continent could be induced which then leads a favorable condition for TC genesis over east Asia/western Pacific sector at upper troposphere, resulting in more WNP TCs in autumn. |
topic |
seasonal difference western North Pacific north tropical Atlantic sea surface temperature Rossby wave train tropical cyclone number |
url |
https://www.frontiersin.org/articles/10.3389/feart.2020.597912/full |
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