Diagnosing the Land-Atmosphere Interactions of Tibetan Plateau and Their Impact on the Subsequent Climate Changes over Asia

Abstract:

As one typical unit in the global climate system, Tibetan Plateau has sensitive and rapid responses to the global climate change. Meanwhile, such changes would conversely influence the climate over the adjacent area, Asia or even the global according to the land-atmosphere interactions. This research aims to investigate the mechanisms of land-atmosphere interactions over Tibetan Plateau and their impact on the subsequent climate changes over Asia. Numerical modeling and statistical analysis methods are adopted. Regional climate models (e.g., RegCM4, WRF) as well as kinds of data resources (obeserved data, reanalysis data, remote sensing data) are used. The field experiments and statistical analysis methods are firstly applied to analyze the characteristics of climate changes over Tibetan Plateau to obtain the land-atmosphere interaction mechanisms. Then, the regional climate model and land surface model are coupled to develop the Land-Atmosphere coupling model. To improve the model’s capability over Tibetan Plateau, data assimilation methods are adopted to construct the Land-Atmosphere coupling model data assimilation system with multi-data resources. The land-atmosphere coupling strength over Tibetan Plateau and their impacts on the subsequent climate changes over Asia are diagnosed with numerical sensitivity experiments based on the coupling models. The results would contribute to the improvement of weather and climate extremes prediction over China and the understanding of the influence of human activities on the climate changes.