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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50324


    Title: Formation of the Philippine Twin Tropical Cyclones during the 2008 Summer Monsoon Onset
    Authors: Chen,TC;Tsay,JD;Yen,MC;Cayanan,EO
    Contributors: 大氣物理研究所
    Keywords: LARGE-SCALE CIRCULATION;GLOBAL FORECAST SYSTEM;SOUTH CHINA SEA;WESTERN PACIFIC;EVOLUTION;IMPACT
    Date: 2010
    Issue Date: 2012-03-27 17:29:24 (UTC+8)
    Publisher: 國立中央大學
    Abstract: Stretched from Indochina, across the South China Sea, to the Philippine Sea, a monsoon cyclonic shear flow was formed by easterlies of the cold surge-like flow in the north and monsoon westerlies in the south before the onset of the tropical Southeast Asian monsoon on 12 May 2008. On this date, two named tropical cyclones (Halong and Matmo) evolved with a 12-h lag from a closed vortex adjacent to the coast of central Vietnam and another closed vortex near Palawan Island (Philippines) within this shear flow. These two cyclones, named the twin Philippine tropical cyclones, moved almost on the same track, along the anomalous shear line (departure from the climatological one) across the Philippines, and turned northeastward to the ocean south of Japan. It was revealed from synoptic analysis that the cold surge-like flow was coupled with the midlatitude eastward-propagating short wave in northeast Asia, and part of the monsoon westerlies were fed by the cross-equatorial flow, the downstream flow of easterlies around the northern rim of the Southern Hemisphere subtropical high. The environment favorable for the formation of the twin cyclones was developed from the tropics-midlatitude interaction between synoptic systems in these two latitudinal zones. Formations of these cyclones were a result of drastic spinups of the two closed vortices (within the monsoon shear flow) following the surge of monsoon westerlies, which coincided with those of easterlies of the cold surge-like flow, and the cross-equatorial flow originating from easterlies between the Southern Hemisphere subtropical high and the Southern Hemisphere shear flow.
    Relation: WEATHER AND FORECASTING
    Appears in Collections:[大氣物理研究所 ] 期刊論文

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