西北太平洋TC高频源地与GMS-SST暖水区及ITCZ的匹配关系
投稿时间: 2005-09-09  最后修改时间: 2005-11-09  点此下载全文
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作者单位
何丽萍 南京大学, 大气科学系, 中尺度灾害性天气教育部重点实验室, 江苏, 南京, 210093;金华市气象局, 浙江, 金华, 321000 
王元 南京大学, 大气科学系, 中尺度灾害性天气教育部重点实验室, 江苏, 南京, 210093 
马辛宇 南京大学, 大气科学系, 中尺度灾害性天气教育部重点实验室, 江苏, 南京, 210093;浙江省气象局, 浙江, 杭州, 310017 
基金项目:国家自然科学基金资助项目(40333025);国家重点基础研究发展规划项目(2004CB418301);江苏省自然科学基金资助项目(BK2005081)
中文摘要:利用GMS高精度遥感海表温度(SST)反演资料、外逸长波辐射(OLR)反演资料和西北太平洋热带气旋(TC)源地及频数数据,分析了GMS-SST、赤道辐合带(ITCZ)、TC源地及频数的时空分布特征。研究发现:TC源地、发生频数以及强度的时空分布和变化均具有趋暖性。GMS-SST大于等于28℃的阈值条件为西北太平洋TC发生和维持的必要条件。并且存在10°N高频收缩轴,其与由GMS-SST大于等于28℃所定义的西北太平洋暖水区,GMS-OLR小于等于240 W·m-2定义的ITCZ的时空分布及变化有很好的相关性,即存在TC高频源地—GMS-SST暖水区—ITCZ三者间的匹配相关。
中文关键词:西北太平洋  热带气旋  卫星遥感  海表温度  赤道辐合带
 
Matching Relation among TC Initiating Locations of High Frequency,SST Warm-Water Region and ITCZ Measured by GMS-5 in the North-West Pacific Ocean
Abstract:By using the high resolution SST(Sea Surface Temperature),OLR(Outgoing Longwave Radiation) data measured by GMS(Geostationary Meteorological Satellite) and the tropical cyclone(TC) frequencies with their initiating locations over the NWP(North-West Pacific) ocean,the characteristics of the temporal and spatial distribution of SST(Sea Surface Temperature),ITCZ(Intertropical Convergence Zone) and TC are analyzed in details.It was found that the frequencies,the intensities and the distributions of TC exist an obvious toward-warming uptrend.Furthermore,the necessary condition of GMS-SST larger than and equal to 28℃ is proposed as a critical ocean-surface temperature to the arising and maintaining of TC.Also there exists a contracting axis for TC high frequencies around 10°N.Such contracting axis indeed suggests an unique synchronous-matching mechanism with the warm-water region,defined by GMS-SST larger than and equal to 28℃,and the ITCZ,defined by OLR less than and equal to 240(W·m-2).That is to say,the strong correlationship exists among the three.
keywords:North-West Pacific ocean(NWP)  Tropical Cyclone(TC)  satellite remote-senseing  Sea Surface Temperature(SST)  Intertropical Convergence Zone(ITCZ)
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