Linkage of Strong Intraseasonal Events of the East Asian Winter Monsoon to the Tropical Convections over the Western Pacific

The East Asian winter monsoon (EAWM) is the most important climate system for transporting Arctic cold air to tropics in boreal winter. Rapid intensification of EAWM, such as a surge, can lead increased tropical convection over western Pacific, but possible effects from intraseasonal variation EAWM unclear. Using high temporal and spatial resolution satellite data, including Outgoing Longwave Radiation (OLR) Tropical Rainfall Measuring Mission (TRMM) precipitation, we show that strong events are associated with Pacific about 6–8 days. Our statistical analysis shows lifetime event 2 weeks, beginning, peak, ending phases occurring at days −6, 0, 6, respectively. During 0 8, observed due anomalous convergence strengthened northerly winds South China Sea. Over land, precipitation Vietnam, northwestern Kalimantan, southern Philippines. In addition, local Hadley circulation during these days, association enhanced convection.