我国灾害性天气与旱涝受到青藏高原多尺度热力强迫的显著影响，但相关物理过程和影响机制尚不清楚。本项目拟综合利用台站观测资料、卫星资料、再分析资料和数值模式预报产品，研究青藏高原多尺度热力异常及其对我国灾害性天气（冷涌和热浪）与旱涝形成的相对贡献，揭示在不同季节和时间尺度上高原热力强迫影响我国灾害性天气与旱涝内在物理过程的差异。同时，对高原多尺度热力强迫调控其它主要海-陆-气影响系统（如：热带低频振荡（MJO）、北大西洋涛动（NAO）和太平洋年代振荡（PDO）等）和我国灾害性天气（冷涌和热浪）与旱涝之间联系进行分析，进而探讨高原多尺度热力作用的非线性影响。最终提出高原多尺度热力异常影响我国灾害性天气（冷涌和热浪）与旱涝的物理概念模型，为全面认识高原地-气耦合系统的影响奠定基础，并为我国灾害性天气与旱涝的预测提供理论依据。

The multi-scale Tibetan Plateau (TP) thermal effects (MTPTEs) play an important role in triggering China disastrous weathers and droughts and floods (DWDFs), but the related physical mechanisms are not fully understood. This project attempts to examine the MTPTEs and the associated linkages with the China DWDFs by using of observational data at gauge stations across China, satellite data, reanalysis data and numerical forecast products, and to reveal the differences of the MTPTEs impact on China DWDFs among different seasons and time scales. Meanwhile, through investigating the modulation effect of the MTPTEs on the linkages between the other major climate systems (e.g., MJO, the NAO and PDO) and China DWFSs, this project aims to examine the non-linear impacts of the MTPTEs. Finally, this project will attempt to propose a physical concept model on how the MTPTEs influence China DWDFs, to fully understand the air-TP coupling system, and to provide a theoretical basis for forecasting China DWDFs. .