Interannual modulation of summer precipitation over North China by the coupled tropical Pacific-Atlantic SST Dipole ModeOA
Using multi-source reanalysis data,this study examines the relationship between the tropical Pacific-Atlantic SST Dipole Mode(TPA-DM)and summer precipitation in North China(NCSP)on the interannual timescale during the period of 1979-2022.The results show that the TPA-DM,the dominant pattern of interannual variability in the tropical Pacific and Atlantic regions,exhibits a significant negative correlation with NCSP.The positive phase of TPA-DM induces subsidence over the Maritime Continent through a zonal circulation pattern,which initiates a Pacific-Japan-like wave train along the East Asian coast.The circulation anomalies lead to moisture deficits and convergence subsidence over North China,leading to below-normal rainfall.Further analysis reveals that cooler SST in the Southern Tropical Atlantic facilitates the persistence of the TPA-DM by stimulating the anomalous Walker circulation associated with wind-evaporation-SST-convection feedback.
Yanjin Mao;Xiaorui Niu;Ping Li;Xianchun Chen;Libin Huang;Xin Tan
Department of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,ChinaDepartment of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,China Centre for Severe Weather and Climate and Hydro-geological Hazards,Wuhan,ChinaDepartment of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,ChinaDepartment of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,ChinaDepartment of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,ChinaDepartment of Atmospheric Sciences,School of Environmental Studies,China University of Geosciences,Wuhan,China Centre for Severe Weather and Climate and Hydro-geological Hazards,Wuhan,China
天文与地球科学
Coupled tropical Pacific-Atlantic SST modePrecipitationENSOAtmospheric teleconnection
《Atmospheric and Oceanic Science Letters》 2026 (1)
P.1-6,6
jointly supported by the Second Tibetan Plateau Scientific Expedition and Research Program[grant number-ber 2019QZKK0103]the National Natural Science Foundation of China[grant number 42293294]the China Meteorological Admin-istration Climate Change Special Program[grant number QBZ202303]。
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