Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2241436 |
Discrepancies between eddy covariance and lysimeter measurements in the assessment of energy balance modeling in vineyards | |
Sanchez, Juan M.1,2; Lopez-Urrea, Ramon3,4; Dona, Carolina5; Montoro, Amelia3,4; Caselles, Vicente5; Galve, Joan M.5 | |
通讯作者 | Sanchez, Juan M. |
会议名称 | Conference on Remote Sensing for Agriculture, Ecosystems, and Hydrology XVIII |
会议日期 | SEP 26-28, 2016 |
会议地点 | Edinburgh, SCOTLAND |
英文摘要 | Remote sensing-based models are a potential technique when evapotranspiration (ET) estimates are needed on a regional scale. These remote sensing methods are typically validated and calibrated using in situ measurements. Eddy covariance (EC) and lysimetry are two of the most prevalent techniques for measuring ET. Some discrepancies arise between these two techniques consequence of the measurement footprint or the spatial variability in atmospheric and surface conditions. An experiment was carried out in the growing season of 2015 in a similar to 4 ha row-crop vineyard in a semi-arid advective location in Central Spain, encouraged by the necessity to assess the feasibility of EC measurements in this area and under these conditions. A 9-m(2) monolithic weighting lysimeter was available. An EC system was deployed together with a net radiometer and a set of soil heat flux plates. Data of the different terms of the energy balance equation were stored every 15 min, and then averaged at an hourly and daily scales. In this work we focus on the comparison between ET measurements from the two methods, EC and lysimetry. The imbalance in the surface energy budget was first analyzed. A lack of closure around 20% was observed. After forcing the closure, discrepancies between EC and lysimeter measurements still remained. Average estimation errors of +/- 0.09 mm h(-1) and +/- 0.5 mm d(-1) were obtained at hourly and daily scales, respectively, whereas a deviation of only 2% was observed in the accumulated ET for the entire experiment. These results support the use of adjusted EC technique to monitor accurate ET in vineyards. |
英文关键词 | Eddy covariance lysimeter surface energy balance energy closure vineyard |
来源出版物 | REMOTE SENSING FOR AGRICULTURE, ECOSYSTEMS, AND HYDROLOGY XVIII |
ISSN | 0277-786X |
出版年 | 2016 |
卷号 | 9998 |
ISBN | 978-1-5106-0401-8 |
EISBN | 978-1-5106-0400-1 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Spain |
收录类别 | CPCI-S |
WOS记录号 | WOS:000393152800022 |
WOS关键词 | CROP COEFFICIENTS ; NORTHWEST CHINA ; MAIZE FIELD ; EVAPOTRANSPIRATION ; CLOSURE ; FOREST ; GRAPES |
WOS类目 | Agronomy ; Ecology ; Remote Sensing ; Water Resources |
WOS研究方向 | Agriculture ; Environmental Sciences & Ecology ; Remote Sensing ; Water Resources |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/305679 |
作者单位 | 1.Univ Castilla La Mancha, Inst Reg Dev, Dept Appl Phys, Av Espana S-N, Albacete 02071, Spain; 2.Univ Castilla La Mancha, IDR, Av Espana S-N, Albacete 02071, Spain; 3.Inst Tecn Agron Prov, Inst Reg Dev, Dept Appl Phys, Parque Empresarial Campollano 2,Avda 61, Albacete 02007, Spain; 4.FUNDESCAM, Av Espana S-N, Albacete 02007, Spain; 5.Univ Valencia, Fac Phys, Dept Earth Phys & Thermodynam, Dr Moliner 50, E-46100 Burjassot, Spain |
推荐引用方式 GB/T 7714 | Sanchez, Juan M.,Lopez-Urrea, Ramon,Dona, Carolina,et al. Discrepancies between eddy covariance and lysimeter measurements in the assessment of energy balance modeling in vineyards[C]:SPIE-INT SOC OPTICAL ENGINEERING,2016. |
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