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doi:  10.12013/qxyjzyj2017-042
台风“灿鸿”、“莲花”和“浪卡”共存期间路径、强度及相互作用分析

Study on the track,intensity and interaction of the coexistent typhoons “Chan hom”,“Linfa” and “Nangka”
摘要点击 194  全文点击 101  投稿时间:2017-09-03  修订日期:2017-11-02
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基金:  国家自然基金(编号:41375049,40905021,41275099);中国博士后科学基金(编号:2011M500894);国家公益性行业(气象)科技专项(编号:GYHY201206005).
中文关键词:  台风,相互作用,路径,强度,物理量场
英文关键词:  typhoon  multicyclone interaction  track  intensity  physical field
           
作者中文名作者英文名单位
吴丹Wu Dan国防科技大学 气象海洋学院
黄泓Huang Hong国防科技大学 气象海洋学院
吕梅Lyu Mei国防科技大学 气象海洋学院
王春明Wang Chunming国防科技大学 气象海洋学院
引用:吴丹,黄泓,吕梅,王春明.2017,台风“灿鸿”、“莲花”和“浪卡”共存期间路径、强度及相互作用分析[J].气象与减灾研究,40(4):282-291
中文摘要:
      利用NCEP 1°×1°再分析资料,对2015年7月西太平洋洋面上台风“莲花”“灿鸿”“浪卡”三者共存期间的路径特征、强度变化及相互作用进行了分析。结果表明:1) 台风“莲花”与“灿鸿”发生互旋,导致强度较弱的“莲花”路径发生逆时针转向;“灿鸿”与“浪卡”发生明显的相互作用。2) “莲花”的低层水汽通道在互旋过程中被“灿鸿”夺走,后者产生反馈气流补充前者;“浪卡”与“灿鸿”在对流层高层通过水汽“连体”通道进行水汽交换。3) 与“莲花”互旋过程中“灿鸿”产生的反馈气流远比相互作用过程中“浪卡”对“灿鸿”的补充气流强,因此相互作用过程结束后“莲花”暖心与涡度继续维持,而“灿鸿”迅速衰弱。4) 两个台风相互作用过程的水汽“连体”通道高度不同,台风“莲花”与“灿鸿”相互作用位于对流层低层,而台风“灿鸿”与“浪卡”相互作用发生在对流层高层。
Abstract:
      Based on NCEP 1°×1° reanalysis data, the path characteristics, intensity variations and interaction process of typhoon “Chan hom”, “Linfa” and “Nangka” were analyzed, which occurred in the western Pacific Ocean in July, 2015. The conclusions were summarized as follows: 1) The mutual rotation between “Lotus” and “Chan hom” caused a counter clockwise path change of “Linfa”. Three days later, the binary tropical cyclone interaction (BTC) happened between “Nangka” and “Chan hom”. 2) The lower moisture transportation channel of “Linfa” was captured by “Chan hom” at mutual rotation stage, which also produced feedback flows as supplement to the former. “Nangka” and “Chan hom” had moisture exchange through the Connect Body Channel (CBC). 3) The distribution of upward motion had a decent correspondence to moisture supply. The intensity changes of warm center and vorticity differed between two pairs of typhoon interactions: The mutual rotation process produced much stronger feedback flow than that of BTC between “Nangka” and “Chan hom”, which can also explain why the warm center and vorticity of “Linfa” was maintained while physical quantities of “Chan hom” decreased rapidly in the end of processes, respectively; The CBCs level of the two processes was different, the former was located in the lower troposphere and the latter occurred at the upper troposphere.
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