Evaluation of the spatial and temporal uncertainties distribution of daily-integrated shortwave downward radiation estimated from polar-orbiting satellite observation
文献类型：EI期刊论文
| 作者 | Liu Ronggao |
| 发表日期 | 2012 |
| 关键词 | Uncertainty analysis Digital storage Geostationary satellites Imaging techniques Orbits Radiometers Remote sensing Satellite imagery Sun |
| 英文摘要 | The polar-orbiting satellite sensor, which can observe the entire Earth's surface with good spatial and spectral resolution, is a potential tool for estimation of global downward shortwave radiation (DSR). However, it can only provide a couple of snapshots in one day, which should be extended to daily-integrated DSR in order to drive the ecosystem models. In this paper, the temporal and spatial uncertainties for estimating of daily-integrated DSR from instantaneous measurements of polar-orbiting satellites are evaluated using geostationary Geosynchronous Meteorological Satellite-5 (GMS-5) observations over East Asia. Those overpass times-including 1030, 1200, and 1330 local time (LT), which correspond to Terra/Moderate Resolution Imaging Spectroradiometer (MODIS), Sea-Viewing Wide Field-of-View Sensor (SeaWiFS), and Aqua/MODIS-are evaluated. The combinations of multiobservations are also assessed. The results show that the daily-integrated DSR from polar-orbiting satellite observations of 1030, 1200, and 1330 underestimate solar radiation by 2.16%(0.46 MJ m-2), 5.44%(1.16 MJ m-2), and 5.54%(1.09 MJ m-2), with anRMSE of 2.05 MJ m-2 (12.92%), 2.50 MJ m-2 (13.33%), and 2.34 MJ m-2 (13.95%) in East Asia with large spatial and seasonal variations. In general, the bias is higher in the southern than in the northern part of East Asia. It is low in January, February, and March, then increases from April and reaches the maximum in June and July, and decreases rapidly to lower than 1.0 MJ m-2 inOctober. The uncertainties of daily-integrated DSR could be reduced by averaging multiday observations or combining of multitime observations. These uncertainties' distributions are important for evaluation the usability of daily-integrated DSR from polar-orbiting satellite data and probably can be used for its calibration. 2012 American Meteorological Society. |
| 出处 | Journal of Atmospheric and Oceanic Technology
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| 卷 | 29期:10页:1481-1491 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31311]  |
| 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 | Liu Ronggao. Evaluation of the spatial and temporal uncertainties distribution of daily-integrated shortwave downward radiation estimated from polar-orbiting satellite observation. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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