中文摘要：

利用1948—2013年NCEP／NCAR逐日和逐月再分析资料分析了青藏高原（下称高原）大气冷热源转换日期与高原季风爆发日期及二者强度的关系。结果表明：近66年来高原〈Q1〉呈现明显的季节变化，热汇最强在1月，热源最强在7月；高原由热汇转变为热源的日期大致在15候，而热源转变为热汇则大致在58候；高原热力作用与高原夏季风强度呈正相关关系，即当大气热源强（弱）时，高原夏季风强（弱）；热源强（弱）年高原主体气流辐合较强（弱），而高原四周辐散较强（弱）；高原主体与四周大气热力差异也呈明显的季节转变，7月高原主体与其四周大气的热力差和高原季风呈正相关，即当高原主体热源较四周大气强（弱）时，高原夏季风就越强（弱）。

英文摘要：

Qinghai-Xizang Plateau as a risen heat source may have a significant impact on Asian and the global climate, especially plays an important role for the outbreak of monsoon. It exists a self-contained climate of pres- sure system on the Tibet Plateau, which is an independent winds formed under the heat of Plateau. Therefore, the thermal effects of the Qinghai-Xizang plateau would have been affected on the plateau monsoon. In order to further understand the relationship between the Qinghai-Xizang plateau monsoon and the atmospheric heat source/ sink, using the daily and monthly reanalysis data of the NCEP/NCAR from 1948 to 2013 to analyze the relation- ship between the change date of plateau atmosphere heating source collection and the plateau monsoon, and the strength of those two. The results show that during the past 66 years, the average monthly plateau heat source is obvious seasonal variations. The strongest heat collection occurs in January and the strongest heat source in July. The heat collection turns into heat source approximately in April, while the heat source turn into the heat collec- tion in October. The heat collection turns into heat source approximately in 15 pentad, while the heat source turn into the heat collection roughly among 58 pentad. Compared with the summer monsoon establishment date, the change from heat sink to heat source is about 3 pentad earlier than that of summer monsoon, and the transition from heat source to heat sink is about 1 pentad ahead of end date. The relationship between thermal effects with the intensity of the summer plateau monsoon presents a positive correlation. When the atmospheric heat source is strong, the plateau summer monsoon is strong. When the atmospheric heat source is weak, the plateau summer monsoon is weak. In the stronger heat source years, convergence is strong in the plateau body, yet divergence be- comes strong in the plateau around. In the weak heat source years, convergence is weak in the plateau body, yet divergence becomes weak in the plateau ar