干旱区生态环境知识资源中心(Arid): The impact of compound drought and heatwave events from 1982 to 2022 on the phenology of Central Asian grasslands

Arid

DOI	10.1016/j.jenvman.2024.121624
	The impact of compound drought and heatwave events from 1982 to 2022 on the phenology of Central Asian grasslands
	Tian, Ruikang; Li, Jianhao; Zheng, Jianghua; Liu, Liang; Han, Wanqiang; Liu, Yujia
通讯作者	Zheng, JH
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2024
卷号	365
英文摘要	In the context of global warming, the occurrence and severity of extreme events like atmospheric drought (AD) and warm spell duration index (WSDI) have increased, causing significant impacts on terrestrial ecosystems in Central Asia's arid regions. Previous research has focused on single extreme events such as AD and WSDI, but the effect of compound hot and dry events (CHWE) on grassland phenology in the arid regions of Central Asia remains unclear. This study utilized structural equation modeling (SEM) and the Pettitt breakpoint test to quantify the direct and indirect responses of grassland phenology (start of season - SOS, length of season - LOS, and end of season - EOS) to AD, WSDI, and CHWE. Furthermore, this research investigated the threshold of grassland phenology response to compound hot and dry events. The research findings indicate a significant increasing trend in AD, WSDI, and CHWE in the arid regions of Central Asia from 1982 to 2022 (0.51 day/year, P < 0.01; 0.25 day/year, P < 0.01; 0.26 day/year, P < 0.01). SOS in the arid regions of Central Asia showed a significant advancement trend, while EOS exhibited a significant advance. LOS demonstrated an increasing trend (-0.23 day/year, P < 0.01; -0.12 day/year, P < 0.01; 0.56 day/year). The temperature primarily governs the variation in SOS. While higher temperatures promote an earlier SOS, they also offset the delaying effect of CHWE on SOS. AD, temperature, and CHWE have negative impacts on EOS, whereas WSDI has a positive effect on EOS. AD exhibits the strongest negative effect on EOS, with an increase in AD leading to an earlier EOS. Temperature and WSDI are positively correlated with LOS, indicating that higher temperatures and increased WSDI contribute to a longer LOS. The threshold values for the response of SOS, EOS, and LOS to CHWE are 16.14, 18.49, and 16.61 days, respectively. When CHWE exceeds these critical thresholds, there are significant changes in the response of SOS, EOS, and LOS to CHWE. These findings deepen our understanding of the mechanisms by which extreme climate events influence grassland phenology dynamics in Central Asia. They can contribute to better protection and management of grassland ecosystems and help in addressing the impacts of global warming and climate change in practice.
英文关键词	Vegetation phenology Extreme drought Warm spell duration index Compound dry and hot events
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001266063700001
WOS关键词	TERRESTRIAL CARBON-CYCLE ; CLIMATE EXTREMES ; VEGETATION PRODUCTIVITY ; TEMPERATE GRASSLANDS ; GROWTH ; EVAPOTRANSPIRATION ; DRY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404481
推荐引用方式 GB/T 7714	Tian, Ruikang,Li, Jianhao,Zheng, Jianghua,et al. The impact of compound drought and heatwave events from 1982 to 2022 on the phenology of Central Asian grasslands[J],2024,365.
APA	Tian, Ruikang,Li, Jianhao,Zheng, Jianghua,Liu, Liang,Han, Wanqiang,&Liu, Yujia.(2024).The impact of compound drought and heatwave events from 1982 to 2022 on the phenology of Central Asian grasslands.JOURNAL OF ENVIRONMENTAL MANAGEMENT,365.
MLA	Tian, Ruikang,et al."The impact of compound drought and heatwave events from 1982 to 2022 on the phenology of Central Asian grasslands".JOURNAL OF ENVIRONMENTAL MANAGEMENT 365(2024).