Compound dry and hot events (CDHEs) are commonly defined as occurrences of dry and hot events at the same time or in close succession. These events have occurred frequently in past decades and caused great losses to multiple sectors including water security, food security, and human health. This calls for an improved understanding of their characteristics and variations. This study provides a database for different characteristics, including frequency, severity, duration, and magnitude, and their variations of CDHEs for the period 1951-2012 over global land areas. We first demonstrate different characteristics of CDHEs during the summers of 2003 and 2010 in Europe to compare these two events from different perspectives. We then evaluate changes in different characteristics of CDHEs over global land areas for the past 62 years. The frequency, severity, duration, and magnitude of CDHEs during 1951-2012 show temporal increases over global land areas with the slope of 0.15 days/decade, 0.25%/decade, 0.06 days/decade, and 0.52%/decade, respectively. Besides, remarkable increases in these characteristics are observed in regions such as central Africa, Europe, Mediterranean regions, the Middle East, and northern parts of East Asia. The results of this study could shed light on ways to improve the documentation and understanding of CDHEs to mitigate their negative impacts.

复合干热事件（CDHE）通常定义为同时或紧接发生干热事件。这些事件在过去的几十年中经常发生，给水安全，粮食安全和人类健康等多个部门造成了巨大损失。这要求对它们的特征和变化有更好的理解。这项研究为不同特征提供了数据库，这些特征包括频率，严重性，持续时间和强度，以及1951-2012年全球陆地区域CDHE的变化。我们首先展示2003年和2010年欧洲夏季CDHE的不同特征，以便从不同角度比较这两个事件。然后，我们评估了过去62年中全球陆地区域CDHE的不同特征的变化。频率 1951-2012年期间CDHE的严重程度，持续时间和强度显示，全球陆地面积随时间增加，斜率分别为0.15天/十年，0.25％/十年，0.06天/十年和0.52％/十年。此外，在非洲中部，欧洲，地中海地区，中东和东亚北部等地区，这些特征也显着增加。这项研究的结果可能为改善CDHE的文献记录和理解以减轻其负面影响提供了方法。地中海地区，中东和东亚北部。这项研究的结果可能为改善CDHE的文献记录和理解以减轻其负面影响提供了方法。地中海地区，中东和东亚北部。这项研究的结果可能为改善CDHE的文献记录和理解以减轻其负面影响提供了方法。