Intercomparison of Three Two-Source Energy Balance Models for Partitioning Evaporation and Transpiration in Semiarid Climates
Intercomparison of Three Two-Source Energy Balance Models for Partitioning Evaporation and Transpiration in Semiarid Climates
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半干旱气候分区蒸发蒸腾的三种二源能量平衡模型的比较
DOI：
10.3390/rs10071149
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发表时间：
2018-07
期刊：
影响因子：
5
通讯作者：
Yue
中科院分区：
文献类型：
--
作者：
Yang;Yongmin;Qiu;Jianxiu;Zhang;Renhua;Huang;Shifeng;Chen;Sheng;Wang;Hui;Luo;Jiashun;Fan;Yue
蒸发(E)和蒸腾(T)信息对于干旱和半干旱地区精确的水资源规划和管理至关重要。基于遥感地表温度的双源能量平衡（TSEB）方法为估算蒸散发（ET）及其E和T分量提供了重要的建模方法，而基于TSEB的蒸散发组分温度的精确分解和E/T的划分需要认真研究。本研究使用了三种TSEB模型：(i)具有Priestley-Taylor方程的TSEB模型，即TSEB- pt；（ii）基于Penman-Monteith方程的TSEB模型，即TSEB- pm； （iii）基于植被覆盖度和地表温度（VFC/LST）空间的分量温度的TSEB模型，即TSEB- tc - ts。利用这些模型研究了构件温度分解对E/T划分精度的影响。在中国西北黑河流域联合遥感试验研究-蒸散发多尺度观测试验（hi水- musoexe）中进行了验证，结果表明，3种方法的潜热通量和感热通量均方根误差（rmse）分别小于76 W/m2和50 W/m2。基于大满超级站稳定氧、氢同位素系统的测量结果，发现3种模式均略微高估了E/ET比值。此外，在MUSOEXE的内核实验区，三种模型之间的E/T划分存在差异。进一步比较表明，不同的温度分解方法导致了E/T分配的差异。与TSEB-TC-TS相比，TSEB-PT和TSEB-PM采用的迭代过程产生了更高的LEC和更低的TC。总的来说，这项工作为理解半干旱区不同温度分解机制的TSEB模型的性能提供了有价值的见解。
Evaporation (E) and transpiration (T) information is crucial for precise water resources planning and management in arid and semiarid areas. Two-source energy balance (TSEB) methods based on remotely-sensed land surface temperature provide an important modeling approach for estimating evapotranspiration (ET) and its components of E and T. Approaches for accurate decomposition of the component temperature and E/T partitioning from ET based on TSEB requires careful investigation. In this study, three TSEB models are used: (i) the TSEB model with the Priestley-Taylor equation, i.e., TSEB-PT; (ii) the TSEB model using the Penman-Monteith equation, i.e., TSEB-PM, and (iii) the TSEB using component temperatures derived from vegetation fractional cover and land surface temperature (VFC/LST) space, i.e., TSEB-TC-TS. These models are employed to investigate the impact of component temperature decomposition on E/T partitioning accuracy. Validation was conducted in the large-scale campaign of Heihe Watershed Allied Telemetry Experimental Research-Multi-Scale Observation Experiment on Evapotranspiration (HiWATER-MUSOEXE) in the northwest of China, and results showed that root mean square errors (RMSEs) of latent and sensible heat fluxes were respectively lower than 76 W/m2 and 50 W/m2 for all three approaches. Based on the measurements from the stable oxygen and hydrogen isotopes system at the Daman superstation, it was found that all three models slightly overestimated the ratio of E/ET. In addition, discrepancies in E/T partitioning among the three models were observed in the kernel experimental area of MUSOEXE. Further intercomparison indicated that different temperature decomposition methods were responsible for the observed discrepancies in E/T partitioning. The iterative procedure adopted by TSEB-PT and TSEB-PM produced higher LEC and lower TC when compared to TSEB-TC-TS. Overall, this work provides valuable insights into understanding the performances of TSEB models with different temperature decomposition mechanisms over semiarid regions.
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DOI：
10.1016/s1464-1909(99)00128-8
发表时间：
2000-01-01
期刊：
PHYSICS AND CHEMISTRY OF THE EARTH PART B-HYDROLOGY OCEANS AND ATMOSPHERE
影响因子：
--
作者：
Roerink, GJ;Su, Z;Menenti, M
通讯作者：
Menenti, M
影响因子：
6.3
作者：
Su, Z
通讯作者：
Su, Z
耦合 Priestley-Taylor 公式和两级梯形的估计蒸发分数 (TMEF) 的双源模型
影响因子：
5
作者：
Sun Hao
通讯作者：
Sun Hao
影响因子：
0.5
作者：
R. Salti;B. Rich
通讯作者：
R. Salti;B. Rich
影响因子：
13.5
作者：
Cleugh, Helen A.;Leuning, Ray;Running, Steven W.
通讯作者：
Running, Steven W.