Impact of Tropical Pacific Precipitation Anomaly on the East Asian Upper-Tropospheric Westerly Jet during the Boreal Winter

摘要: AbstractThe leading mode of boreal winter precipitation variability over the tropical Pacific for period 1980–2010 shows a west–east dipole pattern with one center western North (WNP) and Maritime Continent other equatorial central (CP). Observational evidence that East Asian upper-tropospheric subtropical westerly jet (EAJ) has significant correlation anomalies WNP CP have distinct influence on variation EAJ. A series numerical experiments based linear baroclinic model are performed to confirm heating associated perturbations The results indicate heat source can excite northward-propagating Rossby wave train in upper troposphere Asia facilitate poleward eddy momentum...