北半球（30°N以北）复合干热指数数据集（1982-2015年）
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本研究所使用的CDHI（Composite Drought And Heat Index，复合干热指数）数据覆盖时间范围为1982—2015年，空间分辨率为0.5°×0.5°，时间分辨率为月尺度，空间范围限定在北纬30°以北地区。该数据来源于来自英国国家大气科学中心（https://crudata.uea.ac.uk）提供的逐月降水量和气温数据集计算获得。CDHI能够综合反映干旱与高温事件的耦合特征，其中数值越小，表示复合干热事件的强度越高。
The CDHI (Composite Drought And Heat Index) dataset utilized in this study spans the period from 1982 to 2015, with a spatial resolution of 0.5° × 0.5° and a monthly temporal resolution, and its spatial coverage is restricted to regions north of 30° latitude. This dataset was derived from monthly precipitation and air temperature datasets provided by the UK National Centre for Atmospheric Science (https://crudata.uea.ac.uk). The CDHI can comprehensively reflect the coupled characteristics of drought and high-temperature events, where a lower numerical value corresponds to a higher intensity of compound drought-heat events.
