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黄荣辉, 王磊. 台风在我国登陆地点的年际变化及其与夏季东亚/太平洋型遥相关的关系[J]. 大气科学, 2010, 34(5): 853-864. DOI: 10.3878/j.issn.1006-9895.2010.05.01
引用本文: 黄荣辉, 王磊. 台风在我国登陆地点的年际变化及其与夏季东亚/太平洋型遥相关的关系[J]. 大气科学, 2010, 34(5): 853-864. DOI: 10.3878/j.issn.1006-9895.2010.05.01
HUANG Ronghui, WANG Lei. Interannual Variation of the Landfalling Locations of Typhoons in China and Its Association with the Summer East Asia/Pacific Pattern Teleconnection[J]. Chinese Journal of Atmospheric Sciences, 2010, 34(5): 853-864. DOI: 10.3878/j.issn.1006-9895.2010.05.01
Citation: HUANG Ronghui, WANG Lei. Interannual Variation of the Landfalling Locations of Typhoons in China and Its Association with the Summer East Asia/Pacific Pattern Teleconnection[J]. Chinese Journal of Atmospheric Sciences, 2010, 34(5): 853-864. DOI: 10.3878/j.issn.1006-9895.2010.05.01

台风在我国登陆地点的年际变化及其与夏季东亚/太平洋型遥相关的关系

Interannual Variation of the Landfalling Locations of Typhoons in China and Its Association with the Summer East Asia/Pacific Pattern Teleconnection

  • 摘要: 本文利用1979~2007年日本气象厅JRA-25风场和高度场再分析资料和美国JTWC热带气旋的观测资料分析了7~9月份西北太平洋台风和热带气旋 (TC) 在我国登陆地点的年际变化及其与北半球夏季大气环流异常的东亚/太平洋型 (即EAP型) 遥相关的关系, 特别是分析了7~9月份在厦门以北登陆台风和TC数量的年际变化与夏季 (6~8月) EAP指数的相关。分析结果表明: 当夏季 (6~8月) EAP指数为高指数时, 则7~9月份在东亚和西北太平洋上空500 hPa高度场异常将出现 “-, +, -” EAP型遥相关的波列分布, 这时西太平洋副热带高压的位置偏北、 偏东。在这种情况下, 西北太平洋上较多的台风和TC的移动路径偏北, 这引起了7~9月份在我国厦门以北沿海登陆的台风和TC数量偏多。反之, 当夏季 (6~8月) EAP指数为低指数时, 在东亚和西北太平洋上空500 hPa高度场异常为 “+, -, +” 的 EAP型遥相关的波列分布, 这时西太平洋副热带高压的位置偏南、 偏西。在这种情况下, 西北太平洋上较多的台风和TC移动路径偏南, 这引起了7~9月份在我国厦门以北沿海登陆的台风和TC数量偏少, 较多的台风和TC在厦门以南的华南沿海登陆。

     

    Abstract: The itnerannual variation of the landfalling locations of the western North Pacific typhoons and tropical cyclones (TCs) in China from July to September and its association with the summer East Asia/Pacific pattern (i.e.,EAP pattern) teleconnection of the atmospheric circulation anomalies over the Northern Hemisphere are analyzed by using the data of wind and geopotential height fields from JRA-25 analysis of Japan Meteorological Agency during 1979-2007 and the observational data of tropical cyclones from the US Joint Typhoon Warning Center (JTWC). Especially the correlation between interannual variation of the numbers of landfalling typhoons and TCs to the north of Xiamen and the summer (June-August) EAP index is analyzed. The results show that in summer (June-August) with a high EAP index, the wave-train distribution of “-, +, -” EAP pattern teleconnection of geopotential high anomalies will appear over East Asian and the western North Pacific, and the position of the western Pacific subtropical high will shift northward and eastward at 500 hPa from July to September. In this case, most of the moving tracks of typhoons and TCs over the western North Pacific will be more northward, which can cause more landfalling typhoons and TCs to the north of Xiamen. On the contrary, in summer (June-August) with a low EAP index, the wave-train distribution of “+, -, +” EAP pattern teleconnection of geopotential height anomalies at 500 hPa will appear over East Asia and the western North Pacific, and the position of the western Pacific subtropical high will shift southward and eastward from July to September. In this case, most of the moving tracks of typhoons and TCs over the western North Pacific will be more southward. Therefore, this will cause less landfalling typhoons and TCs on the coast of Southeast China to the north of Xiamen from July to September, and more typhoons and TCs will make landfall on the coast of South China to the south of Xiamen.

     

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