欧亚大陆非均匀加热的成因及其在亚洲季风演变中的作用

我们前期的研究发现，在全球变暖背景下，欧亚大陆地表和对流层大气热状况的演变表现出强烈的区域差异性特征，这种从地表到对流层大气的非均匀加热与近60年的亚洲季风环流变异关系密切。这表明，欧亚大陆内部热状况变化的区域差异性可能在亚洲季风演变中起着重要的作用。基于此，本项目拟利用多种气候资料和NCAR CAM5.0模式，首先通过资料诊断来揭示全球变暖背景下欧亚大陆热状况区域非均匀变异的特征，进而利用数值模拟从气溶胶强迫和气候系统内部年代际变率方面来解释其可能的成因；在充分了解欧亚大陆这种非均匀加热现象的基础上，从热力学的角度来阐明其对亚洲季风变异的重要作用，并利用数值模拟来揭示其间作用的物理机制。本项目的实施有助于我们对全球变暖背景下欧亚大陆热状况变异的深入认识及亚洲季风演变规律的进一步把握。

Our previous studies reported that the thermal condition in land surface and troposphere over Eurasian landmass exhibit spatially uneven variability under global warming background and the spatially uneven heating over Eurasian landmass show significant relationship with the large-scale Asian monsoon circulation anomaly in the recent decades. Therefore, using data and NCAR CAM5.0, this project is conducted to explore the characteristics of spatially uneven heating over Eurasian landmass and its plausible causes via aerosol and the inter-decadal variability of climate system, as well as its impact on the Asian monsoon anomaly and corresponding physical process. The performance of the present project can deepen our understanding on Eurasian thermal condition anomalies and its impact on the evolution of Asian monsoon under the global warming background.