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- WANG Chao
- Key Laboratory of Meteorological Disaster of Ministry of Education, International Research Laboratory of Climate and Environment Change and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, China Beijing Regional Climate Center, China
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- WU Liguang
- Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences, Fudan University, China
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- ZHAO Haikun
- Key Laboratory of Meteorological Disaster of Ministry of Education, International Research Laboratory of Climate and Environment Change and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, China
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- LIU Qingyuan
- Jiangsu Institute of Meteorological Sciences, China
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- WANG Ji
- Beijing Regional Climate Center, China
書誌事項
- タイトル別名
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- An Abrupt Slowdown of Late Season Tropical Cyclone over the Western North Pacific in the Early 1980s
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抄録
<p>Translation speed is an important factor determining locally accumulated disasters induced by tropical cyclones (TCs). We found that the basin wide TC translation speed over the western North Pacific (WNP) in the late season (October–December) experienced an abrupt decrease in the early 1980s. However, this slowdown cannot be explained by the previously proposed deceleration in large-scale steering. In this study, we demonstrated that this slowdown results from the decreased proportion of subtropical TC track frequency in the early 1980s. Because late-season large-scale steering flow in the subtropical WNP is much greater than that in the tropical WNP, TCs influencing the subtropical WNP generally hold greater translation speed than that of TCs staying in the tropical WNP. Thus, a decrease in the ratio of subtropical TC track frequency can lead to a notable decrease in the basin wide TC translation speed. The decreased ratio of subtropical TC track frequency results from the strengthened southwestward steering and the reduced ratio of TC genesis in the tropical eastern WNP, which is linked to a WNP anticyclonic circulation that appears to be driven by the Atlantic Multi-decadal Oscillation. The result introduces the crucial role of TC track shift in the basin wide TC translation speed and has important implications for understanding the effects of climate change on TC translation speed.</p>
収録刊行物
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- 気象集誌. 第2輯
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気象集誌. 第2輯 99 (6), 1413-1422, 2021
公益社団法人 日本気象学会
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詳細情報 詳細情報について
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- CRID
- 1390853354529921408
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- NII論文ID
- 130008129960
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- NII書誌ID
- AA00702524
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- ISSN
- 21869057
- 00261165
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- NDL書誌ID
- 031891695
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可