近千年青藏高原表面加热变化及其与东亚夏季风关系的模拟分析

Based on the global coupled atmosphere-ocean climate model ECHO-G simulation results in recent 1000 years, the characteristics of surface heating in Tibetan Plateau and its relationship with the East Asian summer monsoon are studied. The results show that models successfully reproduce the feature of Tibetan Plateau of cold source in winter and warm source in summer. The sensible heat and surface temperature in winter is negatively correlated but positively correlated in summer. On the other hand, the latent heat and precipitation are positively associated both in inter-annual and interdecadal time scales, implying that latent heat over the Tibetan Plateau basic released by precipitation. Correlation analysis shows that the sensible heat of Tibetan Plateau in summer is significantly negatively correlated with the East Asian summer monsoon intensity index. Stronger heating in Tibetan Plateau corresponds to weaker summer monsoon and increased precipitation in the Yangtze River basin. The impact of latent heat is opposite. In interdecadal time scales, strong heating of Tibetan Plateau in winter period matches the weak summer monsoon and vice versa.