Arid
DOI10.1155/2017/5209173
Analysis of Drought Characteristics in Xilingol Grassland of Northern China Based on SPEI and Its Impact on Vegetation
Tong, Siqin1,2,3; Bao, Yuhai2,3; Te, Rigele2,3; Ma, Qiyun1; Ha, Si1; Lusi, A.1
通讯作者Bao, Yuhai
来源期刊MATHEMATICAL PROBLEMS IN ENGINEERING
ISSN1024-123X
EISSN1563-5147
出版年2017
英文摘要

This research is based on the standardized precipitation evapotranspiration index (SPEI) and normalized difference vegetation index (NDVI) which represent the drought and vegetation condition on land. Take the linear regression method and Pearson correlation analysis to study the spatial and temporal evolution of SPEI and NDVI and the drought effect on vegetation. The results show that (1) during 1961-2015, SPEI values at different time scales showed a downward trend; SPEI-12 has a mutation in 1997 and the SPEI value significantly decreased after this year. (2) During 2000-2015, the annual growing season SPEI has an obvious upward trend in time and the apparent wetting spatially. (3) In the recent 16 years, the growing season NDVI showed an upward trend and more than 80% of the total area’s vegetation increased in Xilingol. (4) Vegetation coverage in Xilingol grew better in humid years and opposite in arid years. SPEI and NDVI had a significant positive correlation; 98% of the region showed positive correlation, indicating that meteorological drought affects vegetation growth more in arid and semiarid region. (5) The effect of drought on vegetation has lag effect, and the responses of different grassland types to different scales of drought were different.


类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000394756300001
WOS关键词CLIMATE
WOS类目Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications
WOS研究方向Engineering ; Mathematics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201070
作者单位1.Northeast Normal Univ, Sch Environm, Changchun 130117, Peoples R China;
2.Inner Mongolia Normal Univ, Coll Geog Sci, Hohhot 010022, Peoples R China;
3.Inner Mongolia Key Lab Remote Sensing & Geog Info, Hohhot 010022, Peoples R China
推荐引用方式
GB/T 7714
Tong, Siqin,Bao, Yuhai,Te, Rigele,et al. Analysis of Drought Characteristics in Xilingol Grassland of Northern China Based on SPEI and Its Impact on Vegetation[J],2017.
APA Tong, Siqin,Bao, Yuhai,Te, Rigele,Ma, Qiyun,Ha, Si,&Lusi, A..(2017).Analysis of Drought Characteristics in Xilingol Grassland of Northern China Based on SPEI and Its Impact on Vegetation.MATHEMATICAL PROBLEMS IN ENGINEERING.
MLA Tong, Siqin,et al."Analysis of Drought Characteristics in Xilingol Grassland of Northern China Based on SPEI and Its Impact on Vegetation".MATHEMATICAL PROBLEMS IN ENGINEERING (2017).
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