Drought characterization across agricultural regions of China using standardized precipitation and vegetation water supply indices

文献类型： 外文期刊

第一作者： Javed, Tehseen

作者： Javed, Tehseen;Zhang, Jiahua;Sha, Zhang;Yun, Bai;Henchiri, Malak;Javed, Tehseen;Zhang, Jiahua;Bhattarai, Nishan;Rashid, Sadaf;Ahmad, Shakeel;Kamran, Muhammad

作者机构：

关键词： Agricultural drought; Agricultural standardized precipitation index (aSPI); Crop production; Remote sensing; Standardized vegetation supply water index (SVSWI)

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.297； 五年影响因子：9.444 ）

ISSN： 0959-6526

年卷期： 2021 年 313 卷

页码：

收录情况： SCI

摘要： Understanding the spatiotemporal dynamics of drought and its potential effect on crop production is critical in decision-making processes to support sustainable food production under climate change. This is especially true for China, the largest producer of cereal crops in the world, where production losses could significantly impact the global food chain. Here, we utilized global remote sensing products to study the spatiotemporal dynamics of meteorological and agricultural droughts across all of China during 1982-2018 and their potential linkage with winter wheat and summer corn yield losses since 2000. Specifically, we derived the agricultural Standardized Precipitation Index (aSPI; at 1, 3, and 6-month scales) and the Standardized Vegetation Supply Water Index (SVSWI) and explored their regional-scale dynamics across four sub-regions of China. Results suggest that the frequency of extreme drought events has increased in China since 2000, mostly affecting the winter wheat growing season (i.e., December-May) across North China. This increased frequency of drought events followed consistent spatiotemporal patterns of 3-month aSPI, mostly affecting Northwest/North China, Qinghai-Tibet, and South China during April, December, and May, respectively. The 3-month aSPI and SVSWI anomalies showed a good correlation with winter wheat yield anomaly across the Qinghai-Tibet area and corn yield across South China. The summer corn yield across all sub-regions and winter wheat yield across some agricultural zones in North China showed significant decreasing trends since 2000. This study provides a useful understanding of the spatiotemporal dynamics of agricultural drought and its potential implications for crop production in China.

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