一个长达一个世纪的中国均质化了每日地表空气温度数据集 (CUG-CMA CHDT)
Xiang Zheng1, Yuyu Ren2, Guoyu Ren3,4
1Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China.
Scientific data
|September 27, 2024
概括
为中国开发了一套新的每日地表空气温度 (SAT) 数据集,可以追溯到1840年. 这一同质化的数据集对于研究长期气候变化和极端事件至关重要.
科学领域:
- 气候学和气象学 气候学和气象学
- 环境科学 环境科学
- 数据科学数据科学数据科学
背景情况:
- 1950年以前中国的高分辨率每日地表空气温度 (SAT) 数据很少,阻碍了长期气候趋势分析.
- 了解历史气候变化和极端事件需要可靠的,扩展的气象记录.
研究的目的:
- 为中国开发一套1950年以前的每日SAT数据集,将观测延伸到1840年.
- 为中国 (1840-2020年) 创建一个全面的,均的长期每日SAT数据集.
- 为区域极端温度变化监测和评估提供宝贵的资源.
主要方法:
- 手动纠正早期每日SAT数据的错误.
- 使用回归,对缺失的最大 (Tmax) 和最小 (Tmin) 温度进行插入.
- 使用RHtest软件和通过角距离权重 (ADW) 方法进行网格化,对车站数据序列进行同质化.
主要成果:
- 创建了一个长达一个世纪的同质化每日SAT数据集 (CUG-CMA CHDT),包括45个主要城市站.
- 20个站点拥有超过100年的观测记录,其他站点的观测记录从68年到100年不等.
- 数据集以2.5° × 2.5° 网格格式提供.
结论:
- CUG-CMA CHDT数据集显著提高了中国历史气象数据的可用性.
- 这一数据集对于深入研究该地区的长期气候趋势,变化和极端温度事件至关重要.
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