| 热带西太平洋西风暴发的天气特征分析 |
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| 引用本文： | 吴增茂,盛立芳,张庆荣,林锡贵,蔡亲炳,石志雄,张凌.热带西太平洋西风暴发的天气特征分析[J].中国海洋大学学报(自然科学版),1993(Z2). |
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| 作者姓名： | 吴增茂 盛立芳 张庆荣 林锡贵 蔡亲炳 石志雄 张凌 |
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| 作者单位： | 青岛海洋大学青岛，青岛海洋大学青岛，中国科学院南海海洋研究所，中国科学院南海海洋研究所，中国科学院南海海洋研究所，中国科学院大气物理研究所，中国科学院大气物理研究所 广州，广州，广州 |
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| 基金项目： | 国家自然科学基金(编号:49236110) |
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| 摘 要： | 根据TOGA—COARE强化观测期间的资料,分析热带西太平洋西风爆发(WWB)的天气型特征。提出引发和维持WWB过程的低层流场基本有三:1.北半球南下冷源与SE信风结合型;2.北半球南下冷气流与SPCZ上的热带气旋结合型;3.南北取向由双气旋构成的偶极子型流场。指出该偶极子相对稳定在更日线附近,并解释了这一事实存在的原因。还讨论了WWB的多时间尺度性,以及WWB过程中气象要素场变化特征等问题。
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| 关 键 词： | 西太平洋暖池 西风爆发 天气特征分析 气旋对偶极子 |
SYNOPTIC FEATURE ANALYSIS DURING WESTERLY WIND BURST OVER THE TROPICAL WESTERN PACIFIC |
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| Wu Zengmao Sheng Lifang.SYNOPTIC FEATURE ANALYSIS DURING WESTERLY WIND BURST OVER THE TROPICAL WESTERN PACIFIC[J].Periodical of Ocean University of China,1993(Z2). |
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| Authors: | Wu Zengmao Sheng Lifang |
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| Abstract: | In this paper, discussed and analysed are the synoptic features of westerly wind burst (WWB) over the tropical western Pacific, based on the intensive observation data of tTOGA-COARE. It is presented that the low -level stream fields which trigger and maintain the WWB process can be classified into three basic patterns: (1) cold surge from the northern hemisphere combines with the southeast trade wind (2)cold air from the northern hemisphere comines with tropical cyclones on SPCZ and (3) a North - South double - cyclone dipole. It is pointed out that the double -cyclone dipole possesses a relatively stationary position at the date line, and this can be explained with the pattern of the monthly mean wind. The multiple - scale features and variation of meteorological element fields of the WWB process are also discussed. |
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| Keywords: | western Pacific warm pool westerly wind burst synoptic feature analysis double-cyclone dipole |
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