气候变化领域集成服务门户(CCPortal): Effects of climate change and human activities on vegetation coverage change in northern China considering extreme climate and time-lag and -accumulation effects

CCPortal

DOI	10.1016/j.scitotenv.2022.160527
	Effects of climate change and human activities on vegetation coverage change in northern China considering extreme climate and time-lag and -accumulation effects
	Ma, Mengyang; Wang, Qingming; Liu, Rong; Zhao, Yong; Zhang, Dongqing
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	860
英文摘要	Quantifying the contributions of climate change (CC) and human activities (HA) to vegetation change is crucial for making a sustainable vegetation restoration scheme. However, the effects of extreme climate and time-lag and -accumulation effects on vegetation are often ignored, thus underestimating the impact of CC on vegetation change. In this study, the spatiotemporal variation of fractional vegetation cover (FVC) from 2000 to 2019 in northern China (NC) as well as the time-lag and -accumulation effects of 15 monthly climatic indices, including extreme indices, on the FVC, were analyzed. Subsequently, a modified residual analysis considering the influence of extreme climate and time-lag and -accumulation effects was proposed and used to attribute the change in the FVC contributed by CC and HA. Given the multicollinearity of climatic variables, partial least squares regression was used to construct the multiple linear regression between climatic indices and the FVC. The results show that: (1) the annual FVC significantly increased at a rate of 0.0268/10a from 2000 to 2019 in all vegetated areas of NC. Spatially, the annual FVC increased in most vegetated areas (-81.6 %) of NC, and the increase was significant in -54.6 % of the areas; (2) except for the temperature duration (DTR), climatic indices had no significant time-lag effects but significant time-accumulation effects on the FVC change. The DTR had both significant time-lag and -accumulation effects on the FVC change. Except for potential evapotranspiration and DTR, the main temporal effects of climatic indices on the FVC were a 0-month lag and 1-2-month accumulation; and (3) the contributions of CC and HA to FVC change were 0.0081/10a and 0.0187/ 10a in NC, respectively, accounting for 30.2 % and 69.8 %, respectively. HA dominated the increase in the FVC in most provinces of NC, except for the Qinghai and Neimenggu provinces.
英文关键词	Climate change; Human activity; Fractional vegetation cover; Extreme climate; Time-lag effect; Time-accumulation effect
语种	英语
WOS研究方向	Environmental Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000919428900001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280388
作者单位	China Institute of Water Resources & Hydropower Research; Tianjin University; Hohai University; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Ma, Mengyang,Wang, Qingming,Liu, Rong,et al. Effects of climate change and human activities on vegetation coverage change in northern China considering extreme climate and time-lag and -accumulation effects[J],2023,860.
APA	Ma, Mengyang,Wang, Qingming,Liu, Rong,Zhao, Yong,&Zhang, Dongqing.(2023).Effects of climate change and human activities on vegetation coverage change in northern China considering extreme climate and time-lag and -accumulation effects.SCIENCE OF THE TOTAL ENVIRONMENT,860.
MLA	Ma, Mengyang,et al."Effects of climate change and human activities on vegetation coverage change in northern China considering extreme climate and time-lag and -accumulation effects".SCIENCE OF THE TOTAL ENVIRONMENT 860(2023).