This study investigates global extreme precipitation events (EPEs) during warm seasons, with a particular focus on EPEs preceded by extreme heat stress (EPE-Hs) and a comparative analysis with those not (EPE-NHs). Using reanalysis product and Earth System Model data, the spatiotemporal characteristics and temperature sensitivities of EPEs are analyzed. Results show that EPE-Hs, while less frequent, have longer duration and greater magnitude compared to EPE-NHs, particularly in high latitude regions. In the future, a significant increase is projected in the characteristics of EPE-Hs, in contrast to the stable duration and magnitude of EPE-NHs. EPE-Hs demonstrate substantially higher temperature sensitivity than EPE-NHs, especially in low latitudes. The precipitation-temperature scaling relationships diverge markedly between EPE-Hs and EPE-NHs, with notable regional variations. These insights are pivotal for crafting region-specific early warning and adaptation strategies to mitigate the risks associated with extreme precipitation under the backdrop of global warming.

本研究调查了温暖季节的全球极端降水事件 （EPE），特别关注极端热应激之前的 EPE （EPE-Hs） 以及与非极端热应激 （EPE-NHs） 的比较分析。利用再分析产品和地球系统模型数据，分析了 EPE 的时空特征和温度敏感性。结果表明，EPE-H 虽然频率较低，但与 EPE-NH 相比具有更长的持续时间和更大的幅度，尤其是在高纬度地区。未来，与 EPE-NHs 的稳定持续时间和量级形成鲜明对比，预计 EPE-Hs 的特性将显着增加。EPE-Hs 表现出比 EPE-NH 高得多的温度敏感性，尤其是在低纬度地区。EPE-Hs 和 EPE-NHs 之间的降水-温度尺度关系存在显著差异，具有显著的区域差异。这些见解对于制定针对特定区域的早期预警和适应策略以减轻在全球变暖背景下与极端降水相关的风险至关重要。