Different El Niño types and tropical cyclone landfall in East Asia
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This study examines whether there exist significant differences in tropical cyclone (TC) landfall between central Pacific (CP) El Niño, eastern Pacific (EP) El Niño, and La Niña during the peak TC season (June- October) and how and towhat extent CP ElNiño influences TC landfall over EastAsia for the period 1961-2009. The peak TC season is subdivided into summer [June-August (JJA)] and autumn [September-October (SO)] . The results are summarized as follows: (i) during the summer of CP El Niño years, TCs are more likely to make landfall over East Asia because of a strong easterly steering flow anomaly induced by the westward shift of the subtropical high and northward-shifted TC genesis. In particular, TCs have a greater probability of making landfall over Japan and Korea during the summer of CP El Niño years. (ii) In the autumn of CP El Niño years, TC landfall in most areas of East Asia, especially Indochina, the Malay Peninsula, and the Philippines, is likely to be suppressed because the large-scale circulation resembles that of EP El Niño years. (iii) During the whole peak TC season [June-October (JJASO)] of CP El Niño years, TCs are more likely to make landfall over Japan and Korea. TC landfall inEastAsia as a whole has an insignificant association with CP El Niño during the peak TC season. In addition, more (less) TCs are likely to make landfall inChina, Indochina, the Malay Peninsula, and the Philippines during the peak TC season of La Niña (EP El Niño) years. © 2012 American Meteorological Society.
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