干旱区生态环境知识资源中心(Arid): Quantifying the Spatial Representativeness of Carbon Flux Footprints of a Grassland Ecosystem in the Semi-Arid Region

Arid

DOI	10.1029/2022JD038269
	Quantifying the Spatial Representativeness of Carbon Flux Footprints of a Grassland Ecosystem in the Semi-Arid Region
	Gong, Haixing; Wang, Yanyu; Wang, Guoyin; Gao, Yuqiu; Li, Guo; Kuang, Zexing; Zhuo, Xianwang; Bi, Jianrong; Wang, Peng; Wang, Weijie; Cheng, Tiantao
通讯作者	Wang, GY ; Cheng, TT
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2023
卷号	128 期号:7
英文摘要	Quantifying the single-site representativeness of carbon flux footprints plays a crucial role in land-atmosphere interaction, especially in semi-arid regions with high-frequency turbulence. In this study, we used multi-platform datasets, including observational data derived from the eddy covariance flux monitoring systems of the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) and multivariate satellite remote sensing, to explore the distribution characteristics of carbon flux footprints during 2007-2016, using a Flux Footprint Prediction model. The relative importance of atmospheric boundary layer factors and vegetation factors on the area of carbon flux footprints was quantified by correlation analysis, multiple stepwise regression, and random forest. Physical mechanisms affecting the differences in the spatial distribution of carbon flux footprints were also analyzed. The results show that the carbon flux footprints are usually distributed on the prevailing wind side of the station, whose main contributing source area is the relatively flat grassland at the summit range of SACOL, with a spatial representativeness of 67.4-507.2 m in length and 54,982-105,329 m(2) in area. Mechanism studies have shown that the frictional velocity, vegetation Index, atmospheric instability parameters, and wind speed have significant importance on the area of carbon flux footprints due to dynamic and thermal forcing, with frictional velocity being dominant, while wind direction has a major effect on the profile shape. This study provides references for the representativeness of site fluxes for semi-arid regions dominated by grassland ecosystems where observations are often scarce.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000962565600001
WOS关键词	LOESS PLATEAU ; EXCHANGE ; CLIMATE ; EVAPOTRANSPIRATION ; PREDICTION ; FOREST ; CHINA ; MODEL
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397352
推荐引用方式 GB/T 7714	Gong, Haixing,Wang, Yanyu,Wang, Guoyin,et al. Quantifying the Spatial Representativeness of Carbon Flux Footprints of a Grassland Ecosystem in the Semi-Arid Region[J],2023,128(7).
APA	Gong, Haixing.,Wang, Yanyu.,Wang, Guoyin.,Gao, Yuqiu.,Li, Guo.,...&Cheng, Tiantao.(2023).Quantifying the Spatial Representativeness of Carbon Flux Footprints of a Grassland Ecosystem in the Semi-Arid Region.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,128(7).
MLA	Gong, Haixing,et al."Quantifying the Spatial Representativeness of Carbon Flux Footprints of a Grassland Ecosystem in the Semi-Arid Region".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128.7(2023).