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Quantifying the uncertainties of transpiration calculations with the Penman-Monteith equation under different climate and optimum water supply conditions
文献类型：期刊论文
| 作者 | Langensiepen ; Fuchs ; Bergamaschi ; Moreshet ; Cohen ; Wolff ; Jutzi ; Cohen ; Rosa ; Li ; Fricke ; Matthias ; Marcel ; Homero ; Samuel ; Yehezkel ; Peter ; Samuel C. ; Shabtai ; Luis Mauro G. ; Yan ; Thomas |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2009 |
| 卷号 | 149期号:40701页码:1063-1072 |
| ISSN号 | 0168-1923 |
| 关键词 | SAP FLOW MEASUREMENT STOMATAL CONDUCTANCE SENSITIVITY-ANALYSIS CANOPY CONDUCTANCE MODEL EVAPORATION FIELD CROP TEMPERATURE DEFICIT |
| 通讯作者 | Langensiepen, M, Humboldt Univ, Inst Crop Sci, Fac Agr & Hort, Invalidenstr 42, D-10115 Berlin, Germany |
| 中文摘要 | The uncertainties of transpiration calculations with the Penman-Monteith equation were quantified under different climate conditions of Brazil, Germany and Israel using maize as a common crop type. All experiments were carried out under non-limiting growing conditions. Canopy resistance was determined by scaling to canopy level specific relations between in situ measurements of incident radiation and stomatal conductance using a light penetration model. The model was tested against heat-pulse measured sap flow in plant stems. The root mean square error (RMSE) of daily calculated transpiration minus measured sap flow was 0.4 mm/day. It was dominated by its variance component (variance = 0.2 {min/day}(2); bias = 0.0 mm/day). Calculated transpiration closely matched the measured trends at the three locations. No significant differences were found between seasons and locations. Uncertainties of canopy conductance parameterizations led to errors of up to 2.1 mm/day. The model responded most sensitively to a 30% change of net radiation (absolute bias error = 1.6 mm/day), followed by corresponding alterations of canopy resistances (0.8 mm/day), vapour pressure deficits (0.5 mm/clay) and aerodynamic resistances (0.34 mm/day). Measured and calculated 30-min or hourly averaged transpiration rates are highly correlated (r(2) = 0.95; n = 10634), and the slope of the regression line is close to unity. The overall RMSE of calculated transpiration minus measured sap flow was 0.08 mm/h and was dominated by its variance component (0.005 {mm/h}(2)). Measured sap flow consistently lagged behind calculated transpiration, because plant hydraulic capacitance delays the change of leaf water potential that drives water uptake. Calculated transpiration significantly overestimated sap flow during morning hours (mean = 0.068 mm/h, n = 321) and underestimated it during afternoon hours (mean = -0.065 mm/h; n = 316). The Penman-Monteith approach as implemented in the present study is sufficiently sensitive to detect small differences between transpiration and water uptake and provides a robust tool to manage plant water supply under unstressed conditions. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 公开日期 | 2011-08-19 |
| 源URL | [http://ir.xjlas.org/handle/365004/10184]  |
| 专题 | 新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据) |
| 推荐引用方式 GB/T 7714 | Langensiepen,Fuchs,Bergamaschi,et al. Quantifying the uncertainties of transpiration calculations with the Penman-Monteith equation under different climate and optimum water supply conditions[J]. AGRICULTURAL AND FOREST METEOROLOGY,2009,149(40701):1063-1072. |
| APA | Langensiepen.,Fuchs.,Bergamaschi.,Moreshet.,Cohen.,...&Thomas.(2009).Quantifying the uncertainties of transpiration calculations with the Penman-Monteith equation under different climate and optimum water supply conditions.AGRICULTURAL AND FOREST METEOROLOGY,149(40701),1063-1072. |
| MLA | Langensiepen,et al."Quantifying the uncertainties of transpiration calculations with the Penman-Monteith equation under different climate and optimum water supply conditions".AGRICULTURAL AND FOREST METEOROLOGY 149.40701(2009):1063-1072. |
入库方式： OAI收割
来源：新疆生态与地理研究所
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