Journal
JOURNAL OF CLIMATE
Volume 30, Issue 9, Pages 3297-3302Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-16-0888.1
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Funding
- Korea Meteorological Administration Research and Development Program [KMIPA 2015-1100]
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The variation of the tropical cyclone (TC) season in the western North Pacific (WNP) was analyzed based on the percentiles of annual TC formation dates. The results show that the length of the TC season is highly modulated by the TC season's start rather than its end. The start of the TC season in the WNP has large interannual variation that is closely associated with the variation of the sea surface temperature (SST) in the Indian Ocean (IO) and the central-eastern Pacific (CEP). When the SSTs of the IO and CEP are warm (cold) in the preceding winter, anomalous high (low) pressure and anticyclonic (cyclonic) circulation are induced around the WNP TC basin the following spring, resulting in a late (early) start of the TC season. These results suggest that a strong El Nino in the preceding winter significantly delays the TC season start in the following year.
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