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Spatio-Temporal Variation of Drought within the Vegetation Growing Season in North Hemisphere (1982-2015)
Zeng, Zhaoqi1,2; Li, Yamei2,3; Wu, Wenxiang1,4; Zhou, Yang1; Wang, Xiaoyue1; Huang, Han1,2; Li, Zhaolei5
2020-08-01
Source PublicationWATER
Volume12Issue:8Pages:18
Corresponding AuthorWu, Wenxiang(wuwx@igsnrr.ac.cn) ; Li, Zhaolei(zhaoleilee@sdau.edu.cn)
AbstractDrought disasters jeopardize the production of vegetation and are expected to exert impacts on human well-being in the context of global climate change. However, spatiotemporal variations in drought characteristics (including the drought duration, intensity, and frequency), specifically for vegetation areas within a growing season, remain largely unknown. Here, we first constructed a normalized difference vegetation index to estimate the length of the growing season for each pixel (8 km) by four widely used phenology estimation methods; second, we analyzed the temporal and spatial patterns of climate factors and drought characteristics (in terms of the Standardized Precipitation Evapotranspiration Index (SPEI)), within a growing season over vegetation areas of the northern hemisphere before and after the critical time point of 1998, which was marked by the onset of a global warming hiatus. Finally, we extracted the highly drought-vulnerable areas of vegetation by examining the sensitivity of the gross primary production to the SPEI to explore the underlying effects of drought variation on vegetation. The results revealed, first, that significant (p< 0.05) increases in precipitation, temperature, and the SPEI (a wetting trend) occurred from 1982 to 2015. The growing season temperature increased even more statistically significant after 1998 than before. Second, the duration and frequency of droughts changed abruptly and decreased considerably from 1998 to 2015; and this wetting trend was located mainly in high-latitude areas. Third, at the biome level, the wetting areas occurred mainly in the tundra, boreal forest or taiga, and temperate coniferous forest biomes, whereas the highly drought-vulnerable areas were mainly located in the desert and xeric shrubland (43.5%) biomes. Our results highlight the fact that although the drought events within a growing season decreased significantly in the northern hemisphere from 1998 to 2015, the very existence of a mismatch between a reduction in drought areas and an increase in highly drought-vulnerable areas makes the impact of drought on vegetation nonnegligible. This work provides valuable information for designing coping measures to reduce the vegetative drought risk in the Northern Hemisphere.
Keywordvegetation growing season Standardized Precipitation Evapotranspiration Index drought characteristics vulnerability
DOI10.3390/w12082146
WOS KeywordWARMING HIATUS ; INTENSE PRECIPITATION ; CLIMATE ; EVAPORATION ; CHINA ; VARIABILITY ; PACIFIC ; TRENDS
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA19040101] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19040304]
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences
WOS Research AreaWater Resources
WOS SubjectWater Resources
WOS IDWOS:000564868000001
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/157975
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWu, Wenxiang; Li, Zhaolei
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Shandong Agr Univ, Key Lab Agr Environm Univ Shandong, Coll Resources & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Zeng, Zhaoqi,Li, Yamei,Wu, Wenxiang,et al. Spatio-Temporal Variation of Drought within the Vegetation Growing Season in North Hemisphere (1982-2015)[J]. WATER,2020,12(8):18.
APA Zeng, Zhaoqi.,Li, Yamei.,Wu, Wenxiang.,Zhou, Yang.,Wang, Xiaoyue.,...&Li, Zhaolei.(2020).Spatio-Temporal Variation of Drought within the Vegetation Growing Season in North Hemisphere (1982-2015).WATER,12(8),18.
MLA Zeng, Zhaoqi,et al."Spatio-Temporal Variation of Drought within the Vegetation Growing Season in North Hemisphere (1982-2015)".WATER 12.8(2020):18.
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