Using 1961-1995 monthly atmospheric apparent heat source/sink 【Q1】 over the Qinghai-Xizang Plateau (QXP)and reanalysis data of NCEP/NCAR, and 1961 ?1994 monthly SST of UK/GISST2, the statistical study is undertaken ...Using 1961-1995 monthly atmospheric apparent heat source/sink 【Q1】 over the Qinghai-Xizang Plateau (QXP)and reanalysis data of NCEP/NCAR, and 1961 ?1994 monthly SST of UK/GISST2, the statistical study is undertaken on the QXP heat source/sink in relation to both atmospheric circulation in Asia and El Nino/La Nina events. It is discovered that there exists noticeable interaction in aquasi-4-year period among the 【Q1】 of the QXP, low-levelmeridional winds east of the QXP, low-level zonal winds in the equatorial Pacific, SST in the equatorial eastern Pacific, and the circulation at mid and high latitudes north of the QXP. They have difference in phase. The cold source intensity of the QXP in winter favours a low-level meridional wind anomaly to prevail in the mainland of China and its coast east of the QXP and to last until the subsequent autumn. The wind anomaly can induce a low-level zonal wind anomaly of the tropic Pacific that finally affects an El Nino/La Nina event in the autumn and subsequent winter.展开更多
基金This work was supported by the State Key Basic Research Project (Grant No. G1998040800) and the Key Basic Research Project on the Tibetan Plateau of the Chinese Academy of Sciences (Grant Nos. KZ951-A1-204 and KZ95T-06).
文摘Using 1961-1995 monthly atmospheric apparent heat source/sink 【Q1】 over the Qinghai-Xizang Plateau (QXP)and reanalysis data of NCEP/NCAR, and 1961 ?1994 monthly SST of UK/GISST2, the statistical study is undertaken on the QXP heat source/sink in relation to both atmospheric circulation in Asia and El Nino/La Nina events. It is discovered that there exists noticeable interaction in aquasi-4-year period among the 【Q1】 of the QXP, low-levelmeridional winds east of the QXP, low-level zonal winds in the equatorial Pacific, SST in the equatorial eastern Pacific, and the circulation at mid and high latitudes north of the QXP. They have difference in phase. The cold source intensity of the QXP in winter favours a low-level meridional wind anomaly to prevail in the mainland of China and its coast east of the QXP and to last until the subsequent autumn. The wind anomaly can induce a low-level zonal wind anomaly of the tropic Pacific that finally affects an El Nino/La Nina event in the autumn and subsequent winter.
