气候变化领域集成服务门户(CCPortal): Extreme temperature events during 1960-2017 in the arid region of Northwest China: Spatiotemporal dynamics and associated large-scale atmospheric circulation

CCPortal

DOI	10.3390/su12031198
	Extreme temperature events during 1960-2017 in the arid region of Northwest China: Spatiotemporal dynamics and associated large-scale atmospheric circulation
	Pi Y.; Yu Y.; Zhang Y.; Xu C.; Yu R.
发表日期	2020
ISSN	10853278
卷号	12 期号:3
英文摘要	Studying the dynamic changes of extreme temperatures and associated large-scale atmospheric circulation is important for predicting the occurrence of extreme temperatures and reducing their adverse impact and damage. Based on the surface temperature data sets collected from 87 weather stations over the arid region of Northwest China (ARNC) during 1960-2017, the Sen's slope estimator, Mann-Kendall test, Cumulative anomaly, Moving t-test, and Synthetic analysis methods were used to analyze the spatiotemporal dynamics and breaking-point change characteristics of extreme temperatures, and to discuss its associated large-scale atmospheric circulation. The results revealed that at the temporal scale, summer days (SU25), warm days (TX90p), warm nights (TN90p), and warm spell duration indicator (WSDI) showed a remarkable increasing trend at the rates of 2.27, 1.49, 3, and 2.28 days/decade, respectively. The frost days (FD), cold days (TX10p), cold nights (TN10p), and cold spell duration indicator (CSDI) significantly decreased at the rates of-3.71,-0.86,-1.77, and-0.76 days/decade, respectively, during the study period. Spatially, the warming trend in the study area is very obvious as a whole, despite pronounced spatial differences in warming rate. After the breakpoint years, the frequency and probability distribution for extreme warm and cold indices were all inclined to the hotter part of the density distribution. This indicates that the climate over the study region shifted sharply and tended to be warmer. The analysis of large-scale atmospheric circulation indicates that the warming trend in the arid region of Northwest China (ARNC) is positively correlated with geopotential height at 500 hPa and negatively correlated with total cloudiness. The findings from this study have important implications for forecasting extreme temperature events and mitigating the impacts of climatological disasters in this region. © 2020 by the authors.
英文关键词	Arid area; Atmospheric circulation; Climate change; Extreme temperature events
语种	英语
scopus关键词	Sustainability (Switzerland)
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158471
作者单位	State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Urban and Environment Science, Huaiyin Normal University, Huai'an, 223300, China; College of Resource and Environment Sciences, Xinjiang University, Urumqi, 830046, China
推荐引用方式 GB/T 7714	Pi Y.,Yu Y.,Zhang Y.,et al. Extreme temperature events during 1960-2017 in the arid region of Northwest China: Spatiotemporal dynamics and associated large-scale atmospheric circulation[J],2020,12(3).
APA	Pi Y.,Yu Y.,Zhang Y.,Xu C.,&Yu R..(2020).Extreme temperature events during 1960-2017 in the arid region of Northwest China: Spatiotemporal dynamics and associated large-scale atmospheric circulation.,12(3).
MLA	Pi Y.,et al."Extreme temperature events during 1960-2017 in the arid region of Northwest China: Spatiotemporal dynamics and associated large-scale atmospheric circulation".12.3(2020).