干旱区生态环境知识资源中心(Arid): Refinements and Analysis of the Optical-Microwave Scintillometry Method Applied to Measurements over a Vineyard in Chile

Arid

DOI	10.3390/w14030474
	Refinements and Analysis of the Optical-Microwave Scintillometry Method Applied to Measurements over a Vineyard in Chile
	Aguirre, Francisca; Hartogensis, Oscar; Meza, Francisco; Suarez, Francisco
通讯作者	Suarez, F (corresponding author)，Pontificia Univ Catolica Chile, Dept Ingn Hidraul & Ambiental, Santiago 7820436, Chile. ; Suarez, F (corresponding author)，Ctr Excelencia Geotermia Los Andes CEGA, Santiago 7820436, Chile. ; Suarez, F (corresponding author)，Ctr Desarrollo Urbano Sustentable CEDEUS, Santiago 7820436, Chile.
来源期刊	WATER
EISSN	2073-4441
出版年	2022
卷号	14 期号:3
英文摘要	Evapotranspiration (ET) is a critical component of the hydrological cycle, and it links water and energy budgets in the form of latent heat (LvE) released into the atmosphere. However, ET is difficult to measure and is not always well described in arid regions. Thus, novel techniques are required for its accurate measurement. Scintillometers are an interesting alternative for traditional methods, such as Eddy Covariance systems (EC). Scintillometer studies have reported good results, but their signals can present unwanted contributions that result in incorrect heat fluxes. In this study, scintillometer data showed unrealistic heat flux values, and thus, the data were reprocessed through spectral analysis to eliminate unwanted contributions from electronic noise, absorption, and tripod vibrations using a new proposed data cleaning method. After performing the spectral cleaning method, scintillometer-based heat fluxes were calculated using several methods: (i) the standalone LAS method, (ii) Hill model, (iii) Ludi et al. model, and (iv) a hybrid model between Hill and Ludi et al. Furthermore, a Monin-Obukhov similarity theory (MOST) analysis was performed to evaluate the fluxes' sensitivity to the choice of the similarity functions. Corrected sensible heat flux (H) estimations agreed well with those obtained with an EC system. However, considerable differences were found for LvE (and, consequently, ET). The Ludi et al. model LvE estimates were closer to those obtained with the EC system, overestimating it by 14%, with a correlation slope of 1.07, R-2 = 0.91, and a Nash-Sutcliffe efficiency of 0.90. Furthermore, it was found that using different Monin-Obukhov similarity functions resulted in more than +/- 12% of difference on the estimated LvE. For future works, it is strongly recommended to apply the proposed spectral cleaning method as it greatly improves scintillometer data.
英文关键词	optical scintillometer microwave scintillometer tripod vibration filter spectral analysis evapotranspiration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000759972500001
WOS关键词	LARGE-APERTURE SCINTILLOMETER ; OBUKHOV SIMILARITY FUNCTIONS ; 3 EVAPOTRANSPIRATION MODELS ; ENERGY-BALANCE CLOSURE ; EDDY-COVARIANCE ; STRUCTURE PARAMETER ; WATER-VAPOR ; REFRACTIVE-INDEX ; DISSIPATION RATE ; SENSIBLE HEAT
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376377
作者单位	[Aguirre, Francisca; Suarez, Francisco] Pontificia Univ Catolica Chile, Dept Ingn Hidraul & Ambiental, Santiago 7820436, Chile; [Aguirre, Francisca; Suarez, Francisco] Ctr Excelencia Geotermia Los Andes CEGA, Santiago 7820436, Chile; [Hartogensis, Oscar] Wageningen Univ & Res, Meteorol & Air Qual, NL-6700 AA Wageningen, Netherlands; [Meza, Francisco] Pontificia Univ Catolica Chile, Dept Ecosistemas & Medio Ambiente, Santiago 7820436, Chile; [Meza, Francisco] Pontificia Univ Catolica Chile, Ctr Interdisciplinario Cambio Global, Santiago 7820436, Chile; [Suarez, Francisco] Ctr Desarrollo Urbano Sustentable CEDEUS, Santiago 7820436, Chile
推荐引用方式 GB/T 7714	Aguirre, Francisca,Hartogensis, Oscar,Meza, Francisco,et al. Refinements and Analysis of the Optical-Microwave Scintillometry Method Applied to Measurements over a Vineyard in Chile[J],2022,14(3).
APA	Aguirre, Francisca,Hartogensis, Oscar,Meza, Francisco,&Suarez, Francisco.(2022).Refinements and Analysis of the Optical-Microwave Scintillometry Method Applied to Measurements over a Vineyard in Chile.WATER,14(3).
MLA	Aguirre, Francisca,et al."Refinements and Analysis of the Optical-Microwave Scintillometry Method Applied to Measurements over a Vineyard in Chile".WATER 14.3(2022).