Hourly precipitation extremes can intensify with temperature at higher rates than expected from thermodynamic increases explained by the Clausius‐Clapeyron (CC) relationship (∼6.5%/K), but local scaling with surface air temperature is highly variable. Here we use daily dew point temperature, a direct proxy of absolute humidity, to estimate at‐gauge local scaling across six macro‐regions for a global data set of over 7,000 hourly precipitation gauges. We find scaling rates from CC to 2 × CC at more than 60% of gauges, peaking in the tropics at a median rate of ∼1.5CC. Moreover, regional scaling rates show surprisingly universal behavior at around CC, with higher scaling in Europe. Importantly for impacts, hourly scaling is persistently higher than scaling for daily extreme precipitation. Our results indicate greater consistency in global scaling than previous work, usually at or above CC, with positive scaling in the (sub)tropics. This demonstrates the relevance of DPT scaling to understanding future changes.

中文翻译：

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每小时极端降水对陆地温度变化的一致大规模响应

克劳修斯-克拉珀龙（CC）关系（〜6.5％/ K）可以解释，每小时的极端降水会随着温度的升高而以比热力学增加所期望的更高的速率加剧（〜6.5％/ K），但是随地表气温的局部变化是高度可变的。在这里，我们使用每日露点温度（绝对湿度的直接代表）来估计全球7,000多个小时降水量数据集的六个宏观区域的标尺局部缩放。我们发现从CC到2×CC的缩放比例超过了60％，在热带地区达到了1.5CC的中位数。此外，区域缩放比例在CC周围显示出令人惊讶的普遍行为，欧洲缩放比例更高。对于影响而言，重要的是，小时刻度始终高于每日极端降水的刻度。我们的结果表明，与以前的工作相比，通常在CC或更高温度下，全球尺度的一致性要好于（亚）热带地区。这证明了DPT扩展与理解未来变化的相关性。