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DOI	10.1007/s00382-019-04619-1
	Sensitivity of ASCE-Penman–Monteith reference evapotranspiration under different climate types in Brazil
	Jerszurki D.; de Souza J.L.M.; Silva L.C.R.
发表日期	2019
ISSN	0930-7575
起始页码	943
结束页码	956
卷号	53 期号:2020-01-02
英文摘要	Sensitivity analysis of reference evapotranspiration (ETo) plays a key role in the simplification and improvement of measurements of terrestrial water balance. The aim of this study was to perform sensitivity analyses of the ASCE-Penman–Monteith reference ET equation (EToPM) for different tropical and subtropical climates, where a quantitative understanding of water fluxes to the atmosphere is limited. Sensitivity coefficients were derived on a daily basis for maximum and minimum air temperature, solar radiation, vapor pressure deficit and wind speed at 2 m height using data from 44-year of actual measurements for calibration (1970–2014), for nine different climatic zones across Brazil. A multiple regression analysis was performed to estimate the relation between meteorological data and EToPM across climatic zones. Seasonal and annual average estimates were obtained by averaging daily values and spatial patterns of EToPM were obtained by interpolating meteorological data from all sampled locations. Five climate variables were used in the analysis, which revealed diverse effects on EToPM across seasons and climatic zones. In order of importance, EToPM was most sensitive to annual variation in vapor pressure deficit (VPD), wind speed (U2) and solar radiation (Rs) in all climate types. Our analysis also showed that VPD, calculated from measurements of relative humidity and temperature (T), are essential to accurately predict EToPM across tropical and subtropical climates. Due to the lack of direct meteorological measurements in many Brazilian regions, we recommend the adjustment of climate-driven hydrological fluxes predictions to the most sensitive variables, i.e., VPD, to improve the precision of reference ET losses. Our results will be useful in delineating the influence of different climatic variables in the ASCE Penman–Monteith model and in guiding new climatic modeling efforts in tropical and subtropical regions. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	calibration; climate classification; climate modeling; equation; evapotranspiration; multiple regression; reference sample; relative humidity; sensitivity analysis; subtropical region; tropical region; water budget; weather forecasting; wind velocity; Brazil
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146170
作者单位	Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer, Israel; Soil and Environment Studies Program, Federal University of Paraná, Curitiba, Paraná, Brazil; Environmental Studies Program, Department of Geography, Institute of Ecology and Evolution, University of Oregon, Eugene, United States
推荐引用方式 GB/T 7714	Jerszurki D.,de Souza J.L.M.,Silva L.C.R.. Sensitivity of ASCE-Penman–Monteith reference evapotranspiration under different climate types in Brazil[J],2019,53(2020-01-02).
APA	Jerszurki D.,de Souza J.L.M.,&Silva L.C.R..(2019).Sensitivity of ASCE-Penman–Monteith reference evapotranspiration under different climate types in Brazil.Climate Dynamics,53(2020-01-02).
MLA	Jerszurki D.,et al."Sensitivity of ASCE-Penman–Monteith reference evapotranspiration under different climate types in Brazil".Climate Dynamics 53.2020-01-02(2019).