气候变化领域集成服务门户(CCPortal): Potential linkages of extreme climate events with vegetation and large-scale circulation indices in an endorheic river basin in northwest China

CCPortal

DOI	10.1016/j.atmosres.2020.105256
	Potential linkages of extreme climate events with vegetation and large-scale circulation indices in an endorheic river basin in northwest China
	Cheng Q.; Zhong F.; Wang P.
发表日期	2021
ISSN	0169-8095
卷号	247
英文摘要	Extreme climate events have devastating effects on human society and environment, and understanding the characteristics of past change is critical for reliable projections of future changes. This study aimed to analyze the spatiotemporal variations in extreme climate events and their impact on vegetation, and considered the associations with individual and multi-factor large-scale circulation indices. Extreme warm indices increased, accompanied by corresponding decreases in extreme cold indices. Indices of nighttime warming were higher than those of daytime warming, indicating instability associated with climate change. Extreme precipitation indices also showed significant increase, whereas abrupt changes were more prevalent in extreme temperature indices than in extreme precipitation indices. Overall, the Heihe River Basin has become warmer and wetter between 1961 and 2016 and the extreme events frequency has increased. Spatially, more annual frost days (ice days) and max 1-day precipitation amount (max 5-day precipitation amount, very wet days) were observed in Qilian Mountain, whereas summer days, tropical nights and consecutive dry days were distributed in the Hexi Corridor and Desert areas. Different vegetation types of normalized-difference vegetation index net primary productivity and vegetation coverage were significantly positively correlated with extreme temperature, whilst significant positive or negative correlations were observed between extreme climate indices and large-scale circulation indices in the Qilian Mountain. In contrast, a significant positive correlation with extreme precipitation more significant, meanwhile, correlations between large-scale circulation indices with extreme temperature more obviously was found in the Hexi Corridor and Desert areas. Multiple wavelet coherence revealed that combinations of large-scale circulation indices are better predictors of changes in 5-day maximum precipitation, cool nights and warm nights in the Qilian Mountain than in Hexi Corridor and Desert areas. These findings have important implications for research of hydrometeorological–ecohydrological processes in alpine endorheic river basins. © 2020 Elsevier B.V.
英文关键词	Different vegetation types; Extreme climate events; Heihe River Basin; Large-scale circulation indices; Multiple wavelet coherence
语种	英语
scopus关键词	Ecosystems; Extreme weather; Landforms; Precipitation (meteorology); Rivers; Vegetation; Watersheds; Extreme precipitation; Extreme temperature indices; Extreme temperatures; Large-scale circulation; Net primary productivity; Normalized difference vegetation index; Positive correlations; Spatio-temporal variation; Climate change; atmospheric circulation; climate change; climate effect; correlation; ecohydrology; extreme event; future prospect; hydrometeorology; NDVI; net primary production; precipitation intensity; reliability analysis; river basin; vegetation cover; weather forecasting; China; Gansu; Heihe Basin; Qilian Mountains
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141731
作者单位	School of Geography and Ecotourism, Southwest Forestry University, Kunming, 650224, China; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; School of Economics, Lanzhou University, Lanzhou, 730000, China; School of Tourism and Geographical Sciences, Yunnan Normal University, Kunming, 650500, China
推荐引用方式 GB/T 7714	Cheng Q.,Zhong F.,Wang P.. Potential linkages of extreme climate events with vegetation and large-scale circulation indices in an endorheic river basin in northwest China[J],2021,247.
APA	Cheng Q.,Zhong F.,&Wang P..(2021).Potential linkages of extreme climate events with vegetation and large-scale circulation indices in an endorheic river basin in northwest China.Atmospheric Research,247.
MLA	Cheng Q.,et al."Potential linkages of extreme climate events with vegetation and large-scale circulation indices in an endorheic river basin in northwest China".Atmospheric Research 247(2021).