Changes in temperature and precipitation extreme indices over China: analysis of a high‐resolution grid dataset
Changes in temperature and precipitation extreme indices over China: analysis of a high‐resolution grid dataset
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DOI：
10.1002/joc.4400
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Botao Zhou;Ying Xu;Jia Wu;Siyan Dong;Ying Shi
中科院分区：
文献类型：
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作者：
Botao Zhou;Ying Xu;Jia Wu;Siyan Dong;Ying Shi
基于2416个站点观测的高分辨率网格化数据（CN05），采用气候变化检测与指数专家组推荐的方法，建立了中国地区分辨率为0.5°×0.5°的气温和降水极端指数网格数据集。本文全面呈现了1961-2010年期间这些指数的时空变化。结果显示，极端气温发生了广泛的显着变化，与变暖相一致，例如，中国极端寒冷天气减少，极端温暖天气增加。最冷的白天和夜晚的升温分别大于最热的白天和最热的夜晚，这与最冷的夜晚大于最冷的白天和最热的夜晚大于最热的白天同时发生。冷暖夜数的变化比冷暖日数的变化更为显着。极端降水量的变化总体上比温度指数在空间上更加复杂，空间覆盖范围也更小，例如，年总降水量、日均降水率、强降水占年降水总量的比例等变化规律，西南—东北地区从西南到东北地区呈负趋势，而东部和西北地区呈正趋势。还分析了 CN05 与基于站点和再分析的其他数据集的极端气候变化的一致性。
Based on the high‐resolution gridding data (CN05) from 2416 station observations, a grid dataset of temperature and precipitation extreme indices with the resolution of 0.5° × 0.5° for China region was developed using the approach recommended by the Expert Team on Climate Change Detection and Indices. This article comprehensively presents temporal and spatial changes of these indices for the time period 1961–2010. Results showed widespread significant changes in temperature extremes consistent with warming, for instance, decreases in cold extremes and increases in warm extremes over China. The warming in the coldest day and night is larger than the warmest day and night, respectively, which is concurrent with the coldest night larger than the coldest day and the warmest night larger than the warmest day. Changes in the number of the cold and warm nights are more remarkable than the cold and warm days. Changes in precipitation extremes are, in general, spatially more complex and exhibit a less widespread spatial coverage than the temperature indices, for instance, the patterns of annual total precipitation amount, average daily precipitation rate, and the proportion of heavy precipitation in total annual precipitation are similar with negative trends in a southwest–northeast belt from Southwest China to Northeast China while positive trends in eastern China and northwestern China. The consistency of changes in climate extremes from the CN05 with other datasets based on the stations and reanalyses is also analysed.