He Jun1; Yang Xiaohua2; Li Zhe1; Zhang Xuejun1; Tang Qiuhong1
Source Publicationinternationaljournalofdisasterriskscience
AbstractAs a major agricultural country, China suffers from severe meteorological drought almost every year. Previous studies have applied a single threshold to identify the onset of drought events, which may cause problems to adequately characterize long-term patterns of droughts. This study analyzes meteorological droughts in China based on a set of daily gridded (0.5A degrees A xA 0.5A degrees) precipitation data from 1961 to 2014. By using a multi-threshold run theory approach to evaluate the monthly percentage of precipitation anomalies index (Pa), a drought events sequence was identified at each grid cell. The spatiotemporal variations of drought in China were further investigated based on statistics of the frequency, duration, severity, and intensity of all drought events. Analysis of the results show that China has five distinct meteorological drought-prone regions: the Huang-Huai-Hai Plain, Northeast China, Southwest China, South China coastal region, and Northwest China. Seasonal analysis further indicates that there are evident spatial variations in the seasonal contribution to regional drought. But overall, most contribution to annual drought events in China come from the winter. Decadal variation analysis suggests that most of China's water resource regions have undergone an increase in drought frequency, especially in the Liaohe, Haihe, and Yellow River basins, although drought duration and severity clearly have decreased after the 1960s.
Funding Project[National Basic Research Program of China] ; [National Natural Science Foundation of China] ; [National Youth Top-notch Talent Support Program in China]
Document Type期刊论文
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
He Jun,Yang Xiaohua,Li Zhe,et al. spatiotemporalvariationsofmeteorologicaldroughtsinchinaduring19612014aninvestigationbasedonmultithresholdidentification[J]. internationaljournalofdisasterriskscience,2016,7(1):63.
APA He Jun,Yang Xiaohua,Li Zhe,Zhang Xuejun,&Tang Qiuhong.(2016).spatiotemporalvariationsofmeteorologicaldroughtsinchinaduring19612014aninvestigationbasedonmultithresholdidentification.internationaljournalofdisasterriskscience,7(1),63.
MLA He Jun,et al."spatiotemporalvariationsofmeteorologicaldroughtsinchinaduring19612014aninvestigationbasedonmultithresholdidentification".internationaljournalofdisasterriskscience 7.1(2016):63.
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