气候变化领域集成服务门户(CCPortal): Effects and contributions of meteorological drought on agricultural drought under different climatic zones and vegetation types in Northwest China

CCPortal

DOI	10.1016/j.scitotenv.2022.153270
	Effects and contributions of meteorological drought on agricultural drought under different climatic zones and vegetation types in Northwest China
	Cao, Shengpeng; Zhang, Lifeng; He, Yi; Zhang, Yali; Chen, Yi; Yao, Sheng; Yang, Wang; Sun, Qiang
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	821
英文摘要	Meteorological drought is one of the driving forces behind agricultural drought. The response of agricultural drought to meteorological drought remains poorly understood under different climatic zones and vegetation types in Northwest China (NWC). Furthermore, the contribution of climate factors and human activities to agricultural drought in NWC remains unclear. We combined the Standardized Precipitation Evapotranspiration Index (SPEI) and the satellite Vegetation Condition Index (VCI) to characterize meteorological and agricultural drought, respectively. Based on the trend analysis, Spearman's correlation coefficient and residual trend analysis, we studied the variation characteristics and response relationships of meteorological and agricultural drought under different climatic zones and vegetation types in NWC from 2000 to 2019 and evaluated the contributions of climate factors (SPEI and precipitation) and human activities on the agricultural drought. The results showed that under different climatic zones and vegetation types, the SPEI and VCI all showed an upward trend in NWC, indicating that meteorological and agricultural drought slowed down. It was further pointed out that the climate was humidified and the soil moisture increased in NWC. Meteorological drought has a definite effect on agricultural drought, and the effect varied non-linearly along the drought gradient with the strongest responses in the semiarid ecosystems. Drought resistance of different climatic zones and vegetation types was different, caused by the specific sensitivity and uniqueness of local arid environment. Among them, grasslands dominated the regional SPEI-VCI changes in NWC.. The combined effects of climatic factors (SPEI and precipitation) and human activities promoted the variation of agricultural drought in NWC. Climatic factors were the main drivers of agricultural drought change in grasslands, with the contribution rate reaching 76.71%. However, human activities all contributed significantly to agricultural drought than climatic factors, especially in the Loos Plateau, Junggar Basin and northern Tianshan Mountains, where the positive contribution of human activities exceeded 80%. Thus, the SKI and VCI can effectively reveal the change law of meteorological drought and agricultural drought in NWC. This study provides a theoretical basis for drought disaster relationship assessment.
英文关键词	Standardized Precipitation Evapotranspiration Index; Vegetation Condition Index; Drought response; Human activities; Northwest China
语种	英语
WOS研究方向	Environmental Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000800673700008
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280656
作者单位	Lanzhou Jiaotong University
推荐引用方式 GB/T 7714	Cao, Shengpeng,Zhang, Lifeng,He, Yi,et al. Effects and contributions of meteorological drought on agricultural drought under different climatic zones and vegetation types in Northwest China[J],2022,821.
APA	Cao, Shengpeng.,Zhang, Lifeng.,He, Yi.,Zhang, Yali.,Chen, Yi.,...&Sun, Qiang.(2022).Effects and contributions of meteorological drought on agricultural drought under different climatic zones and vegetation types in Northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,821.
MLA	Cao, Shengpeng,et al."Effects and contributions of meteorological drought on agricultural drought under different climatic zones and vegetation types in Northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 821(2022).