气候变化领域集成服务门户(CCPortal): Impact of the spatial resolution on the energy balance components on an open-canopy olive orchard

CCPortal

DOI	10.1016/j.jag.2018.09.001
	Impact of the spatial resolution on the energy balance components on an open-canopy olive orchard
	Ramírez-Cuesta J.M.; Allen R.G.; Zarco-Tejada P.J.; Kilic A.; Santos C.; Lorite I.J.
发表日期	2019
ISSN	15698432
起始页码	88
结束页码	102
卷号	74
英文摘要	The recent technical improvements in the sensors used to acquire images from land surfaces has made possible to assess the performance of the energy balance models using unprecedented spatial resolutions. Thus, the objective of this work is to evaluate the response of the different energy balance components obtained from METRIC model as a function of the input pixel size. Very high spatial resolution airborne images (≈50 cm) on three dates over olive orchards were used to aggregate different spatial resolutions, ranging from 5 m to 1 km. This study represents the first time that METRIC model has been run with such high spatial resolution imagery in heterogeneous agricultural systems, evaluating the effects caused by its aggregation into coarser pixel sizes. Net radiation and soil heat flux showed a near insensitive behavior to spatial resolution changes, reflecting that the emissivity and albedo respond linearly to pixel aggregation. However, greater discrepancies were obtained for sensible (up to 17%) and latent (up to 23%) heat fluxes at spatial resolutions coarser than 30 × 30 m due to the aggregation of non-linear components, and to the inclusion of non-agricultural areas in such aggregation. Results obtained confirm the good performance of METRIC model when used with high spatial resolution imagery, whereas they warn of some major errors in crop evapotranspiration estimation when medium or large scales are used. © 2018 Elsevier B.V.
英文关键词	Energy balance; Evapotranspiration; METRIC model; Spatial resolution
语种	英语
scopus关键词	canopy; energy balance; evapotranspiration; imaging method; modeling; orchard; pixel; spatial resolution
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156571
作者单位	Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), Campus Universitario de Espinardo, Murcia, 30100, Spain; IFAPA, Centro “Alameda del Obispo”, Avda. Menéndez Pidal s/n. 14004, Córdoba, Spain; Kimberly Research Center, University of Idaho, Kimberly, ID, United States; Instituto de Agricultura Sostenible (IAS), Consejo Superior de Investigaciones Científicas (CSIC), Avda. Menéndez Pidal s/n., Córdoba, 14004, Spain; Department of Civil Engineering School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, United States
推荐引用方式 GB/T 7714	Ramírez-Cuesta J.M.,Allen R.G.,Zarco-Tejada P.J.,et al. Impact of the spatial resolution on the energy balance components on an open-canopy olive orchard[J],2019,74.
APA	Ramírez-Cuesta J.M.,Allen R.G.,Zarco-Tejada P.J.,Kilic A.,Santos C.,&Lorite I.J..(2019).Impact of the spatial resolution on the energy balance components on an open-canopy olive orchard.International Journal of Applied Earth Observation and Geoinformation,74.
MLA	Ramírez-Cuesta J.M.,et al."Impact of the spatial resolution on the energy balance components on an open-canopy olive orchard".International Journal of Applied Earth Observation and Geoinformation 74(2019).