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中文摘要: 利用历史天气图、台风年鉴，以及ECMWF和NMC再分析的风场等资料，研究盛夏一些系统的活动特征及赤道辐合带北跳及其和台风与西风槽相互作用型的关系，得到如下一些事实：①块状、自东向西移动的渤海日本海高压，准定常的、河套以东西风槽，低空偏东、偏南急流等系统的活动，都有利于出现台风与西风槽相互作用，有利于出现400mm以上台风降水。②“75．8”、“84．8”和“96．8”3个台风与西风槽相互作用型年7月赤道辐合带都经过两次北跳，达到它们一年的最北位置，第一次在7月第2候，第二次在7月第4、第5候。6个不是台风与西风槽型年一般无两次北跳。③北半球赤道辐合带北跳或者是受澳大利亚冷高压的东南气流影响，或者是受西南太平洋上变性暖高压的东南气流影响，当这种东南气流越过赤道，在北半球适当环流条件下达到较北纬度产生出一连串气旋辐合带，即赤道辐合带北跳。这种越赤道气流不仅对赤道辐合带有如此作用，还能促使赤道辐合带上的热带低压发展成台风。
中文关键词: TT相互作用型，赤道辐合带，澳大利亚冷高压
Abstract:Using historical weather maps, typhoon year-books, and wind fields re-analyzed by ECMWF and NMC, the relations between the characters of some synoptic systems in summer, intertropical convergence zone (ITCZ) skipping northward and the interaction between typhoon and westerly though (TT) pattern are studied. The results are as follows. ① The Bohai sea high and the Japan sea high moving westward, quasi-permanent westerly though locating in the west of Hetao, and low-level southeasterly jet are beneficial to the interaction betwen typhoon and westerly though and the precipitation being caused by typhoon more than 400mm.② The ITCZ had skipped northward two times and reached to the most northern part of the whole year in July of three TT pattern years of "75.8","84.8", and "96.8". The first time of the ITCZ skipping northward was in the second pentad while the second time was in the forth or fifth pentad of July. The ITCZ had not skipped northward two times in other six non-TT pattern year.③ The southeast air current of the Australia cold high or the southeast air current of the southwest Pacific warms high affect the ITCZ of the northern hemisphere and skipping the northward. When the cross-equatorial southeast flow reaches to certain latitude of the northern hemisphere under a suitable circulation condition and then a sereis of cyclonic convergence zone will be generated due to the ITCZ northward skipping. The cross-equatorial flow not only causes the ITCZ northward skipping but can also convert the warm low of the ITCZ into typhoon.
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基金项目:国家气象中心资助
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引用文本：
仇永炎,马德贞,林玉成,1999.台风与西风槽相互作用与赤道辐合带的北跳[J].气象,25(2):3-9.
,1999.The Relations Between the Intertropical Convergence Zone(ITCZ) Skipping Northward and the Interaction Between Typhoon and Westerly Trough(TT) Pattern[J].Meteor Mon,25(2):3-9.
仇永炎,马德贞,林玉成,1999.台风与西风槽相互作用与赤道辐合带的北跳[J].气象,25(2):3-9.
,1999.The Relations Between the Intertropical Convergence Zone(ITCZ) Skipping Northward and the Interaction Between Typhoon and Westerly Trough(TT) Pattern[J].Meteor Mon,25(2):3-9.