Satellite-based estimation of daily average net radiation under clear-sky conditions
文献类型：SCI/SSCI论文
| 作者 | Hou J. T. ; Jia G. S. ; Zhao T. B. ; Wang H. S. ; Tang B. H. |
| 发表日期 | 2014 |
| 关键词 | daily average net radiation satellite climate model four-component radiation surface radiation balance surface-energy balance reflectance distribution function remote-sensing algorithm bidirectional reflectance solar-radiation noaa-avhrr heterogeneous landscape shortwave radiation vegetation canopy iberian peninsula |
| 英文摘要 | Daily average net radiation (DANR) is an important variable for estimating evapotranspiration from satellite data at regional scales, and is used for atmospheric and hydrologic modeling, as well as ecosystem management. A scheme is proposed to estimate the DANR over large heterogeneous areas under clear-sky conditions using only remotely sensed data. The method was designed to overcome the dependence of DANR estimates on ground data, and to map spatially consistent and reasonably distributed DANR, by using various land and atmospheric data products retrieved from MODIS (Moderate Resolution Imaging Spectroradiometer) data. An improved sinusoidal model was used to retrieve the diurnal variations of downward shortwave radiation using a single instantaneous value from satellites. The downward shortwave component of DANR was directly obtained from this instantaneous value, and the upward shortwave component was estimated using satellite-derived albedo products. Four observations of air temperature from MOD07_L2 and MYD07_L2 data products were used to derive the downward longwave component of DANR, while the upward longwave component was estimated using the land surface temperature (LST) and the surface emissivity from MOD11_L2. Compared to in situ observations at the cropland and grassland sites located in Tongyu, northern China, the root mean square error (RMSE) of DANR estimated for both sites under clear-sky conditions was 37 W m(-2) and 40 W m(-2), respectively. The errors in estimation of DANR were comparable to those from previous satellite-based methods. Our estimates can be used for studying the surface radiation balance and evapotranspiration. |
| 出处 | Advances in Atmospheric Sciences |
| 卷 | 31 |
| 期 | 3 |
| 页 | 705-720 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0256-1530 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29840]  |
| 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 | Hou J. T.,Jia G. S.,Zhao T. B.,et al. Satellite-based estimation of daily average net radiation under clear-sky conditions. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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