On the feasibility of temporally upscaling instantaneous evapotranspiration using weather forecast information
文献类型：SCI/SSCI论文
| 作者 | Tang R. L.; Tang, B. H.; Wu, H.; Li, Z. L. |
| 发表日期 | 2015 |
| 关键词 | land-surface temperature energy-balance closure of-day measurements air-temperature fluxes models evaporation algorithm water field |
| 英文摘要 | Quantification of land-surface evapotranspiration (ET) is highly significant in water resources management, climate change studies, and numerical weather prediction. The constant reference evaporative fraction method (EFr, the ratio of the actual to reference ET), which assumes that the daily EFr is equal to that at the satellite overpass time, is a scheme that has been widely applied to upscale remotely sensed instantaneous ET to daily ET. To overcome the difficulties encountered in the acquisition of tower-based meteorological variables, this study investigates the feasibility of using publicly available weather forecast information to estimate the daily reference ET using the constant EFr method. A two-source energy balance model is adopted to compute the instantaneous ET using Moderate-Resolution Imaging Spectroradiometer (MODIS) remote-sensing data acquired between January 2011 and October 2012 at the Yucheng Comprehensive Experimental Station in the North China Plain. The results show that the daily maximum and minimum air temperatures from weather forecast information are consistent with the corresponding ground-based measurements, with a bias of 0.8K and a root mean square error (RMSE) of <2.0K. The daily global solar radiation and daily wind speed were poorly forecast when compared with the ground-based measurements. Using the meteorological variables from the daily weather forecast information produced a small bias of 0.1mm day(-1) and an RMSE of 0.6mm day(-1) when the estimated daily reference ET was compared with that derived using the ground-based meteorological measurements. When the remotely sensed instantaneous ET and half-hourly reference ET were as accurate as the ground-based measurements, the upscaling method produced the daily ET, using the meteorological variables from the weather forecast information, with a bias of 0.1mm day(-1) and an RMSE of 0.7mm day(-1). |
| 出处 | International Journal of Remote Sensing |
| 卷 | 36 |
| 期 | 19-20 |
| 页 | 4918-4935 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0143-1161 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38485]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Tang R. L.,Tang, B. H.,Wu, H.,et al. On the feasibility of temporally upscaling instantaneous evapotranspiration using weather forecast information. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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