Tropical Cyclone Activities in the WNP Regions associated with CT/WP El Nino

Abstract:

Tropical cyclones (TCs) occurring in the Western North Pacific (WNP) serve as a hydrometeorological factor that affects change in the precipitation pattern during the summer in East Asia. While the influence of El Niño on WNP TCs has been investigated extensively, relatively little research has been conducted to quantify the impacts of CT/WP El Niño on Korea-affected TC activities and regional variability in TC-induced precipitation over the Korean peninsula. The result of analyzing the large-scale environments associated with CT/WP El Nino was revealed that atmosphere-ocean environment of large-scale in WP El Nino years offers better conditions for typhoon development more than that in CT El Nino years. In particular, comparison of the SST, a direct heat source of typhoon, with the atmosphere environment showed a remarkable difference. The result of this study relies on short observations and samples relatively, but it was found that KP-affected TC activities and changes in rainfalls of TCs through CT/WP El Nino was sensitively occurred, and it is expected to reduce the damages caused by TCs and response properly to each basin and be used to establish the ways of adjustment in a changing climate.