摘要
By NCEP/NCAR monthly mean reanalysis data including OLR,500 hPa geopotential height field and so on,effects of summer tropical convection on the location and intensity variation of Western Pacific subtropical high,rainfall of Yangtze valley and Huaihe River basin were studied by using correlation analysis,synthesis analysis.In summer,when the convective activities are intensified (weakened) from the areas around Philippines to Indo-China Peninsula through South China Sea,the Western Pacific subtropical high may shift northward (southward).What's more,the Western Pacific subtropical high has obvious abrupt shifts or unobvious abrupt shifts in the end of June and early July during its northward advance.It affected the stagnation time of East Asia monsoon rain-belt in the Yangtze valley and Huaihe River basin,and caused that the rainfall of this zone was below or above normal.
By NCEP/NCAR monthly mean reanalysis data including OLR,500 hPa geopotential height field and so on,effects of summer tropical convection on the location and intensity variation of Western Pacific subtropical high,rainfall of Yangtze valley and Huaihe River basin were studied by using correlation analysis,synthesis analysis.In summer,when the convective activities are intensified (weakened) from the areas around Philippines to Indo-China Peninsula through South China Sea,the Western Pacific subtropical high may shift northward (southward).What's more,the Western Pacific subtropical high has obvious abrupt shifts or unobvious abrupt shifts in the end of June and early July during its northward advance.It affected the stagnation time of East Asia monsoon rain-belt in the Yangtze valley and Huaihe River basin,and caused that the rainfall of this zone was below or above normal.
