The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency
The monsoon is regarded as a key system influencing tropical cyclone (TC) activity over the Western North Pacific (WNP). However, the relationship between WNP TC frequency (TCF) and the monsoon across different timescales remains incompletely understood. This study explores the interannual-scale rel...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/17/13/2317 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839631556534075392 |
|---|---|
| author | Xin Li Jian Cao Boyang Wang Jiawei Feng |
| author_facet | Xin Li Jian Cao Boyang Wang Jiawei Feng |
| author_sort | Xin Li |
| collection | DOAJ |
| description | The monsoon is regarded as a key system influencing tropical cyclone (TC) activity over the Western North Pacific (WNP). However, the relationship between WNP TC frequency (TCF) and the monsoon across different timescales remains incompletely understood. This study explores the interannual-scale relationship between WNP TCF and the WNP summer monsoon over the period 1982–2020. We found that the interannual variation in basin-scale TCF is dominated by dynamic factors, particularly lower troposphere vorticity and middle troposphere ascending motion, which are driven by the WNP summer monsoon. Enhanced monsoonal precipitation over the WNP intensifies convective heating, which acts as a diabatic heat source and triggers a Rossby wave response to the west. This response generates anomalous lower troposphere cyclonic circulation and ascending motion in the main TC development region. In turn, the strengthened WNP summer monsoon circulation further amplifies precipitation, establishing positive feedback between atmospheric circulation and convection. This mechanism establishes dynamic conditions favorable for TC genesis, thereby dominating the basin-scale interannual variation in TCF. |
| format | Article |
| id | doaj-art-3c16c9c1788b4b54b9e5a01107ddaee3 |
| institution | Matheson Library |
| issn | 2072-4292 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-3c16c9c1788b4b54b9e5a01107ddaee32025-07-11T14:42:41ZengMDPI AGRemote Sensing2072-42922025-07-011713231710.3390/rs17132317The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone FrequencyXin Li0Jian Cao1Boyang Wang2Jiawei Feng3State Key Laboratory of Climate System Prediction and Risk Management and Earth System Modeling Center, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaState Key Laboratory of Climate System Prediction and Risk Management and Earth System Modeling Center, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaState Key Laboratory of Climate System Prediction and Risk Management and Earth System Modeling Center, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaState Key Laboratory of Climate System Prediction and Risk Management and Earth System Modeling Center, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaThe monsoon is regarded as a key system influencing tropical cyclone (TC) activity over the Western North Pacific (WNP). However, the relationship between WNP TC frequency (TCF) and the monsoon across different timescales remains incompletely understood. This study explores the interannual-scale relationship between WNP TCF and the WNP summer monsoon over the period 1982–2020. We found that the interannual variation in basin-scale TCF is dominated by dynamic factors, particularly lower troposphere vorticity and middle troposphere ascending motion, which are driven by the WNP summer monsoon. Enhanced monsoonal precipitation over the WNP intensifies convective heating, which acts as a diabatic heat source and triggers a Rossby wave response to the west. This response generates anomalous lower troposphere cyclonic circulation and ascending motion in the main TC development region. In turn, the strengthened WNP summer monsoon circulation further amplifies precipitation, establishing positive feedback between atmospheric circulation and convection. This mechanism establishes dynamic conditions favorable for TC genesis, thereby dominating the basin-scale interannual variation in TCF.https://www.mdpi.com/2072-4292/17/13/2317WNP summer monsoonTC frequencyinterannual variationlarge-scale environmental conditions |
| spellingShingle | Xin Li Jian Cao Boyang Wang Jiawei Feng The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency Remote Sensing WNP summer monsoon TC frequency interannual variation large-scale environmental conditions |
| title | The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency |
| title_full | The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency |
| title_fullStr | The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency |
| title_full_unstemmed | The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency |
| title_short | The Western North Pacific Monsoon Dominates Basin-Scale Interannual Variations in Tropical Cyclone Frequency |
| title_sort | western north pacific monsoon dominates basin scale interannual variations in tropical cyclone frequency |
| topic | WNP summer monsoon TC frequency interannual variation large-scale environmental conditions |
| url | https://www.mdpi.com/2072-4292/17/13/2317 |
| work_keys_str_mv | AT xinli thewesternnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT jiancao thewesternnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT boyangwang thewesternnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT jiaweifeng thewesternnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT xinli westernnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT jiancao westernnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT boyangwang westernnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency AT jiaweifeng westernnorthpacificmonsoondominatesbasinscaleinterannualvariationsintropicalcyclonefrequency |