Assessing albedo dynamics and its environmental controls of grasslands over the Tibetan Plateau

doi:10.1016/j.agrformet.2021.108479

	Assessing albedo dynamics and its environmental controls of grasslands over the Tibetan Plateau
	Zheng, Lei 1,2; Qi, Youcun 1,2; Qin, Zhangcai 3,4; Xu, Xiaofeng 5; Dong, Jinwei 1,6
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2021-09-15
卷号	307 页码:11
关键词	Albedo Aridity NDVI Snow cover Soil moisture Grassland Climate change
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2021.108479
通讯作者	Qi, Youcun(youcun.qi@igsnrr.ac.cn) ; Qin, Zhangcai(qinzhangcai@mail.sysu.edu.cn)
英文摘要	Land surface albedo, as an essential biophysical factor, plays an essential role in surface energy balance. Identifying environmental drivers of albedo in the Tibetan Plateau (TP) helps to understand the role of the "third pole" in responding to environmental change and regulating regional climate. Based on remotely sensed data of albedo, Normalized Difference Vegetation Index (NDVI), snow cover, and soil moisture, this study investigated the effects of land cover (i.e., vegetation, snow) and soil on albedo from the perspectives of spatial, temporal, and spectral (visible, near-infrared, and shortwave) changes of albedo. Generally, changes in shortwave (SW) albedo were primarily driven by changes in snow cover during the growing season (from May to September), predominantly in May and June. The NDVI had larger contributions to visible (VIS) albedo change and was identified as the foremost important driver for VIS albedo in July and August. The correlations between the nearinfrared (NIR) albedo and NDVI were positive in the mid- and late growing season in eastern TP. Soil moisture was negatively correlated with albedo throughout the growing season and was identified as the foremost important driver in August. The NIR albedo was more susceptible than the VIS albedo to changes in soil moisture. The correlations between NDVI and albedo varied across different categories of aridity caused by changing correlations between NIR albedo and NDVI along the aridity gradients, and consequently the VIS and NIR albedo counterbalance can further limit the contributions of vegetation greenness on SW albedo in sub-humid and humid region. Our findings are expected to improve understandings of energy budget simulations over TP region in land surface models.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA2006040101] ; Guangdong Provincial Department of Science and Technology[2019ZT08G090] ; National Key Research project: The Tibetan Plateau Land-Air Coupling System Change and Its Global Climate Effect[91637211] ; National Key Research and Development Project[2018YFC1507505] ; National Key Research and Development Project[2016YFC0400902] ; Hundred Talent Program
WOS关键词	SNOW COVER ; CLIMATE-CHANGE ; SURFACE-TEMPERATURE ; ALPINE GRASSLAND ; SOIL-MOISTURE ; GRAIN-SIZE ; VEGETATION ; DESERT ; GROWTH ; VARIABILITY
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000682515100003
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; Guangdong Provincial Department of Science and Technology ; National Key Research project: The Tibetan Plateau Land-Air Coupling System Change and Its Global Climate Effect ; National Key Research and Development Project ; Hundred Talent Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164637]
专题	中国科学院地理科学与资源研究所
通讯作者	Qi, Youcun; Qin, Zhangcai
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Datun Rd 11A, Beijing 100101, Peoples R China 3.Sun Yat Sen Univ, Sch Atmospher Sci, Key Lab Trop Atmosphere Ocean Syst, Minist Educ, Zhuhai 519000, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 5.China Meteorol Adm, Beijing 100081, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Lei,Qi, Youcun,Qin, Zhangcai,et al. Assessing albedo dynamics and its environmental controls of grasslands over the Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,307:11.
APA	Zheng, Lei,Qi, Youcun,Qin, Zhangcai,Xu, Xiaofeng,&Dong, Jinwei.(2021).Assessing albedo dynamics and its environmental controls of grasslands over the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,307,11.
MLA	Zheng, Lei,et al."Assessing albedo dynamics and its environmental controls of grasslands over the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 307(2021):11.