热带印度洋海温和土壤湿度对中国东部夏季高温热浪的协同影响

在全球增暖的大背景下，中国东部频繁遭受高温热浪事件的影响，对经济建设和居民健康造成了严重威胁。因此，研究中国东部夏季高温热浪形成机制及其主要影响因素至关重要。热带印度洋海温和中国东部土壤湿度已被证明对中国东部夏季高温热浪有重要影响。然而，目前的研究通常将两者分开进行分析，很少探讨两者对中国东部夏季高温热浪的协同影响。热带印度洋海温可以通过作用于中国东部夏季环流系统进而影响该地区土壤湿度-大气相互作用过程，从而调节土壤湿度对高温热浪的影响。这种协同作用对高温热浪，尤其是超强高温热浪事件的形成可能有重要影响。本项目拟结合统计诊断分析和数值试验研究夏季热带印度洋海温和土壤湿度对中国东部夏季高温热浪的协同影响，并分析其中的物理过程和反馈机制。此项目的开展不仅有助于我们理解中国东部高温热浪的形成机制及热带印度洋海温和土壤湿度在其中的作用，更能为提高我国高温热浪季节预测和防灾减灾能力提供科学依据。

Eastern China is vulnerable to the heat wave events under global warming, which poses a serious threat to economic development and residents' health. Understanding the mechanism of summer heat wave in Eastern China and its main influencing factors are very important. Tropical Indian Ocean sea surface temperature (SST) and soil moisture over Eastern China have been demonstrated to have critical impacts on the summer heat waves over Eastern China. However, existing studies usually analyze the impacts of the two factors separately, and rarely discuss the synergistic effects of the tropical Indian Ocean SST and soil moisture on summer heat waves in Eastern China. Summer tropical Indian Ocean SST can affect the process of soil moisture-atmosphere interaction over Eastern China by influencing the summer circulation system, which in turn affects the contribution of soil moisture to heat waves. This synergistic effect may play an important role in the formation of heat waves, especially the formation of super heat waves in Eastern China. This project intends to investigate the synergistic effects of tropical Indian Ocean SST and soil moisture on summer heat waves in Eastern China based on statistical analysis and numerical simulation experiments, and analyze the physical processes. This project will not only improve our understanding of the influence of tropical Indian Ocean SST and soil moisture on the heat waves in Eastern China, but also enhance our capacity to prevent and mitigate natural disasters.