Multiscale Validation of the 8-day MOD16 Evapotranspiration Product Using Flux Data Collected in China
文献类型：SCI/SSCI论文
| 作者 | Tang R. L.; Shao, K.; Li, Z. L.; Wu, H.; Tang, B. H.; Zhou, G. Q.; Zhang, L. |
| 发表日期 | 2015 |
| 关键词 | Eddy covariance (EC) system evapotranspiration (ET) large aperture scintillometer (LAS) MOD16 validation large-aperture scintillometer eddy covariance measurements energy-balance closure land-cover surface-temperature satellite data modis data algorithm models improvements |
| 英文摘要 | Accurate estimates of terrestrial evapotranspiration (ET) are critical and significant to the field for modeling water and energy transfer between the land surface and atmosphere. This paper evaluates the 8-day MOD16 actual ET product using the ground-based eddy covariance (EC) system and large aperture scintillometer (LAS) measurements collected from 2008 to 2011 at seven sites in North and Northwest China. Overall, the 8-day MOD16 ET reproduces the temporal patterns of both the LAS and EC measurements but tends to underestimate and overestimate these measurements at high and low ET levels, respectively. It is also of limited use when surface is irrigated because under such condition significant underestimation is observed. Using the LAS measurements that also include a large source area does not generate a better agreement than using the EC measurements which comprise a small source area. The 8-day MOD16 ET averaged over 3 x 3 km(2) MODIS pixels agree better with both the EC and LAS measurements than that extracted at the 1 x 1 km2 MODIS pixel. For the EC validation, the relative bias and the relative root-mean-square error (RMSE) vary between 5% and -59% and between 35% and 120%, respectively, for the LAS validation, the relative bias and the relative RMSE vary between 6% and -69% and between 55% and 108%, respectively. The agreement between one site and another is not consistent and varies greatly. More validation work is recommended to testing the general applicability of the MOD16 ET product at a large number of sites worldwide. |
| 出处 | Ieee Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| 卷 | 8 |
| 期 | 4 |
| 页 | 1478-1486 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1939-1404 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38484]  |
| 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.,Shao, K.,Li, Z. L.,et al. Multiscale Validation of the 8-day MOD16 Evapotranspiration Product Using Flux Data Collected in China. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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