| 1977-2008年北印度洋热带气旋统计特征分析 |
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| 引用本文： | 吴风电,罗 坚.1977-2008年北印度洋热带气旋统计特征分析[J].气象与环境科学,2011,34(3):7-13. |
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| 作者姓名： | 吴风电 罗 坚 |
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| 作者单位： | 解放军理工大学气象学院,南京,211101 |
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| 摘 要： | 采用美国联合台风警报中心（JTWC）提供的北印度洋1977-2008年热带气旋资料、NOAA提供的1982-2008年高分辨率合成资料和NCEP提供的1982-2008年全球再分析资料,对北印度洋上167个热带气旋个例进行了统计分析,结果表明：1）北印度洋热带气旋通常发生在阿拉伯海东部和孟加拉湾中部,阿拉伯海上活动的热...
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| 关 键 词： | 北印度洋 热带气旋 统计特征 小波分析 |
Statistical Character Analyze of Tropical Cyclone During 1977-2008 in North Indian Ocean |
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| Abstract: | Adopting the tropical cyclone（TC） data during 1977-2008 in North Indian Ocean provided by JTWC,high-resolution blended data during 1982-2008 provided by NOAA,global reanalysis data during 1982-2008 provided by NCEP,the paper statistical analyzes 167 tropical cyclone cases in North Indian Ocean and the results show that： 1）The origin area of tropical cyclone was lie in the eastern of Arabian sea and middle of Bengal Bay.The tropical cyclones in Arabian sea was more frequent than that in Bengal Bay,the moved path of tropical cyclones in Arabian sea was often along with the western Ghats and moved toward northwest,landed over south of Pakistan,and the tropical cyclones in Bengal Bay usually landed over Bengal and the south of Burma.2）By using wavelet analysis,we found that the inter-annual variation of tropical cyclone in North Indian Ocean had the character of 2-4 years and 4-8 years significant cycle.3）Analyzed the intensity of the tropical cyclone and found out that there were 20 tropical cyclones meet the typhoon standard,3 tropical cyclones meet the severe typhoon standard,18 tropical cyclones meet the super typhoon standard.4）Obvious seasonal variation exhibited the form of high-low-high-low in spring,summer,autumn and winter;the spring and autumn were the high frequently season of tropical cyclone.The results of analyzing the stream field in 500 hPa show that the variation of convergence zone in 500 hPa stream field well explained seasonal changes of tropical cyclone.5）Sea surface temperature and monsoon impacted on occurrence frequency of tropical cyclone,high sea surface temperature and weak vertical wind shear were in favor of occurrence of tropical cyclone. |
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| Keywords: | North Indian Ocean tropical cyclone statistical character wavelet analysis |
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