气候变化领域集成服务门户(CCPortal): Effect of shrub encroachment on land surface temperature in semi-arid areas of temperate regions of the Northern Hemisphere

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DOI	10.1016/j.agrformet.2022.108943
	Effect of shrub encroachment on land surface temperature in semi-arid areas of temperate regions of the Northern Hemisphere
	Shen, Xiangjin; Liu, Yiwen; Liu, Binhui; Zhang, Jiaqi; Wang, Lei; Lu, Xianguo; Jiang, Ming
发表日期	2022
ISSN	0168-1923
EISSN	1873-2240
卷号	320
英文摘要	Under the influences of climate change and human activities, grassland ecosystems are being invaded by shrubs around the world, especially in temperate semi-arid regions of the Northern Hemisphere. Shrub encroachment can not only affect the properties of grassland ecosystem, but also have an important impact on regional or global climate by affecting biogeochemical and biophysical processes. Although shrub encroachment has become a serious ecological problem in the northern temperate region during the past decades, the possible effects of shrub encroachment on regional climate in northern temperate grasslands remain unclear due to a lack of in situ and long-term environmental records. Based on the satellite-derived land use data, land surface temperature (LST), evapotranspiration, leaf area index, and albedo data, this study quantified, for the first time, the biophysical effects of shrub encroachment on regional climate in semi-arid areas of temperate regions of the Northern Hemisphere. The results indicate that shrub encroachment tends to increase the average annual daytime and mean LST in most of the northern temperate semi-arid region due to increased bare soil fraction. In contrast, shrub encroachment could decrease the daytime LST in relatively humid region of southwest of North America by increasing evapotranspiration (vegetation coverage) and decreasing bare soil fraction. In the arid center region of Central Asia, grassland conversion to shrubland slightly decreases the surface temperature during both daytime and nighttime due to increased albedo caused by decreasing soil water content. Our findings imply that the biophysical effects of shrub encroachment on regional climate should be considered in climate models if they are to accurately simulate climate change in temperate regions of the Northern Hemisphere. More attention should be paid to the climate feedbacks of shrub encroachment, especially considering the distinct effects in different regions and how these climate feedbacks are likely to further impact ecosystem properties.
英文关键词	Grassland; Shrub encroachment; Climate change; Temperature; Feedback
语种	英语
WOS研究方向	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000795681100004
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280454
作者单位	Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Northeast Forestry University - China
推荐引用方式 GB/T 7714	Shen, Xiangjin,Liu, Yiwen,Liu, Binhui,et al. Effect of shrub encroachment on land surface temperature in semi-arid areas of temperate regions of the Northern Hemisphere[J],2022,320.
APA	Shen, Xiangjin.,Liu, Yiwen.,Liu, Binhui.,Zhang, Jiaqi.,Wang, Lei.,...&Jiang, Ming.(2022).Effect of shrub encroachment on land surface temperature in semi-arid areas of temperate regions of the Northern Hemisphere.AGRICULTURAL AND FOREST METEOROLOGY,320.
MLA	Shen, Xiangjin,et al."Effect of shrub encroachment on land surface temperature in semi-arid areas of temperate regions of the Northern Hemisphere".AGRICULTURAL AND FOREST METEOROLOGY 320(2022).