气候变化领域集成服务门户(CCPortal): Carbon fluxes and environmental controls across different alpine grassland types on the Tibetan Plateau

CCPortal

DOI	10.1016/j.agrformet.2021.108694
	Carbon fluxes and environmental controls across different alpine grassland types on the Tibetan Plateau
	Wang, Yuyang; Xiao, Jingfeng; Ma, Yaoming; Luo, Yiqi; Hu, Zeyong; Li, Fu; Li, Yingnian; Gu, Lianglei; Li, Zhaoguo; Yuan, Ling
通讯作者	Ma, YM (通讯作者)，Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst & Resour, Land Atmosphere Interact & Its Climat Effects Grp, Beijing 100101, Peoples R China.
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	311
英文摘要	The magnitude and spatial patterns of carbon fluxes in alpine grasslands determine the regional terrestrial carbon balance of the Tibetan Plateau. However, the patterns and controlling factors of carbon fluxes on the plateau remain unclear, hampering the understanding of the carbon cycle of these vulnerable ecosystems. In this study, we compared the spatial variations of carbon fluxes of ten alpine ecosystems with diverse grassland types and explored their environmental controls across these different ecosystems. Our results show that the mean annual net ecosystem exchange (NEE) of carbon dioxide (CO2) varied from -284 to 31 g C m(-2) across sites. The alpine meadow ecosystems in the northeast and east of the plateau were strong CO2 sinks (similar to x223C 200 g C m(-2) y(-1)), while the western alpine grasslands were weak CO2 sinks or even sources. During the growing season, soil temperature generally played the dominant role in regulating the daily variations of the carbon fluxes for the alpine meadow ecosystems in the cold and humid northeastern areas, while soil moisture was the main controlling factor for the alpine grassland ecosystems in the dry western areas. Annual gross primary productivity (GPP), ecosystem respiration (Re) and the carbon sink capacity linearly increased with the increasing longitude but linearly decreased with elevation. The spatial pattern of annual NEE was primarily controlled by surface soil moisture, and higher soil water content (SWC) led to greater carbon sink capacity. SWC, vapor pressure deficit (VPD) also had favorable effects on the annual GPP and Re. The spatial variations of carbon fluxes resulted primarily from the longitudinal or altitudinal variations of the dominant environmental factors. This study provides guidance for the assessment of carbon fluxes on the Tibetan Plateau.
关键词	ECOSYSTEM CO2 EXCHANGE DIOXIDE EXCHANGE EDDY-COVARIANCE INNER-MONGOLIA TERRESTRIAL ECOSYSTEMS STEPPE ECOSYSTEM USE EFFICIENCY SINK STRENGTH WATER-VAPOR MEADOW
英文关键词	Tibetan Plateau; Carbon sink; Alpine meadow; Alpine steppe; Eddy covariance; Spatial pattern; Environmental drivers
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000717360500011
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254478
作者单位	[Wang, Yuyang; Ma, Yaoming; Yuan, Ling] Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst & Resour, Land Atmosphere Interact & Its Climat Effects Grp, Beijing 100101, Peoples R China; [Wang, Yuyang; Ma, Yaoming; Yuan, Ling] Univ Chinese Acad Sci, Beijing, Peoples R China; [Xiao, Jingfeng] Univ New Hampshire, Earth Syst Res Ctr, Inst Study Earth Oceans & Space, Durham, NH 03824 USA; [Ma, Yaoming] Lanzhou Univ, Coll Atmospher Sci, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou, Peoples R China; [Luo, Yiqi] No Arizona Univ, Dept Biol Sci, Ctr Ecosyst Sci & Soc, Box 5640, Flagstaff, AZ 86011 USA; [Hu, Zeyong; Gu, Lianglei; Li, Zhaoguo] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou, Peoples R China; [Li, Fu] Qinghai Inst Meteorol Sci, Xining, Peoples R China; [Li, Yingnian] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yuyang,Xiao, Jingfeng,Ma, Yaoming,et al. Carbon fluxes and environmental controls across different alpine grassland types on the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,311.
APA	Wang, Yuyang.,Xiao, Jingfeng.,Ma, Yaoming.,Luo, Yiqi.,Hu, Zeyong.,...&Yuan, Ling.(2021).Carbon fluxes and environmental controls across different alpine grassland types on the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,311.
MLA	Wang, Yuyang,et al."Carbon fluxes and environmental controls across different alpine grassland types on the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 311(2021).