干旱区生态环境知识资源中心(Arid): Turbulent fluxes at kilometer scale determined by optical-microwave scintillometry in a heterogeneous oasis cropland of the Heihe River Basin

Arid

DOI	10.1016/j.agrformet.2023.109544
	Turbulent fluxes at kilometer scale determined by optical-microwave scintillometry in a heterogeneous oasis cropland of the Heihe River Basin
	Xu, Feinan; Wang, Weizhen; Huang, Chunlin; Wang, Jiemin; Ren, Zhiguo; Feng, Jiaojiao; Dong, Leilei; Zhang, Yang; Kang, Jian
通讯作者	Wang, WZ
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2023
卷号	339
英文摘要	Observations of kilometer-scale turbulent fluxes of sensible (H) and latent heat (LE) are required for the validation of flux estimate algorithms from satellite remote-sensing data and the development of parameterization schemes in the hydro-meteorological models. Since 2019, two sets of Optical and Microwave scintillometer (OMS) systems have been operated in the Heihe River Basin of northwestern China, one on an alpine grassland of upper reaches, another on an oasis cropland of middle reaches, to measure both the areal H and LE. Combined with the observations of eddy-covariance (EC) and meteorological tower systems in both sites, an improved procedure for OMS data processing is proposed. The newly proposed procedure especially improves the preprocessing of raw scintillation data, properly uses the current probably better Ludi et al. (2005) method in deriving meteorological structure parameters, and chooses the coefficients of similarity functions by Kooijmans and Hartogensis (2016) in calculating fluxes. Evaluated with the results of rather homogeneous grassland, the area-averaged H and LE over the heterogeneous oasis are then determined. Estimates of H and LE agree reasonably well with those obtained from EC in most cases. However, the most interesting is that LE over the oasis during the early crop growing stages is clearly larger than that of EC; while both agree well during the longer crop grown periods. Footprint analysis shows that, compared with EC, the OMS has clearly larger source area that contains a slight area of orchard and shelterbelts distributed near the light path, leading to larger LE during the early stages of crop growth. The area-averaged evapotranspiration (ET) over the oasis is then analyzed more acceptably, which varies from 3 to 5 mm day-1 depending on meteorological conditions during the 39 days of the crop growing period. These results are used to validate the Penman-Monteith-Leuning Version 2 (PML-V2) scheme.
英文关键词	Optical -microwave scintillometry Sensible and latent heat fluxes Kilometer scale Heterogeneous surface Heihe river basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001017507400001
WOS关键词	LARGE-APERTURE SCINTILLOMETER ; ENERGY-BALANCE CLOSURE ; TEMPERATURE-HUMIDITY CORRELATION ; AVERAGED SURFACE FLUXES ; SENSIBLE HEAT FLUXES ; EDDY-COVARIANCE ; REFRACTIVE-INDEX ; LAND-SURFACE ; WATER-VAPOR ; STRUCTURE PARAMETERS
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395007
推荐引用方式 GB/T 7714	Xu, Feinan,Wang, Weizhen,Huang, Chunlin,et al. Turbulent fluxes at kilometer scale determined by optical-microwave scintillometry in a heterogeneous oasis cropland of the Heihe River Basin[J],2023,339.
APA	Xu, Feinan.,Wang, Weizhen.,Huang, Chunlin.,Wang, Jiemin.,Ren, Zhiguo.,...&Kang, Jian.(2023).Turbulent fluxes at kilometer scale determined by optical-microwave scintillometry in a heterogeneous oasis cropland of the Heihe River Basin.AGRICULTURAL AND FOREST METEOROLOGY,339.
MLA	Xu, Feinan,et al."Turbulent fluxes at kilometer scale determined by optical-microwave scintillometry in a heterogeneous oasis cropland of the Heihe River Basin".AGRICULTURAL AND FOREST METEOROLOGY 339(2023).