Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026144 |
Inversion of AMSR-E observations for land surface temperature estimation: 1. Methodology and evaluation with station temperature | |
Jimenez, C.1,2; Prigent, C.2; Ermida, S. L.3; Moncet, J. -L.4 | |
2017-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Portugal; USA |
英文摘要 | Inversions of the Earth Observation Satellite (EOS) Advanced Microwave Scanning Radiometer (AMSR-E) brightness temperatures (T-bs) to derive the land surface temperature (T-s) are presented based on building a global transfer function by neural networks trained with AMSR-E T-bs and retrieved microwave T-s*. The only required inputs are the T-bs and monthly climatological emissivities, minimizing the dependence on ancillary data. The inversions are accompanied by a coarse estimation of retrieval uncertainty, an estimate of the quality of the retrieval, and a series of flags to signal difficult inversion situations. For approximate to 75% of the land surface the root-mean-square difference (RMSD) between the training target T-s* and the neural network retrieved T-s is below 2.8 K. The RMSD when comparing with the Moderate Resolution Imaging Spectroradiometer (MODIS) clear-sky T-s is below 3.9 K for the same conditions. Over 10 ground stations, AMSR-E and MODIS T-s were compared with the in situ data. Overall, MODIS agrees better with the station T-s than AMSR-E (all-station mean RMSD of 2.4 K for MODIS and 4.0 for AMSR-E), but AMSR-E provides a larger number of T-s estimates by being able to measure under cloudy conditions, with an approximated ratio of 3 to 1 over the analyzed stations. At many stations the RMSD of the AMSR-E clear and cloudy sky are comparable, highlighting the ability of the microwave inversions to provide T-s under most atmospheric conditions. Closest agreement with the in situ T-s happens for stations with dense vegetation, where AMSR-E emissivity is less varying. |
英文关键词 | land surface temperature microwaves |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399655200010 |
WOS关键词 | VALIDATION ; EMISSIVITY ; PRODUCTS ; RETRIEVALS ; RADIATION ; NETWORK ; WEATHER ; DESIGN ; CLOUD |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33327 |
专题 | 气候变化 |
作者单位 | 1.Estellus, Paris, France; 2.Paris Observ, CNRS, LERMA, Paris, France; 3.Univ Lisbon, Inst Dom Luiz, Lisbon, Portugal; 4.Atmospher & Environm Res Inc, Lexington, MA USA |
推荐引用方式 GB/T 7714 | Jimenez, C.,Prigent, C.,Ermida, S. L.,et al. Inversion of AMSR-E observations for land surface temperature estimation: 1. Methodology and evaluation with station temperature[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(6). |
APA | Jimenez, C.,Prigent, C.,Ermida, S. L.,&Moncet, J. -L..(2017).Inversion of AMSR-E observations for land surface temperature estimation: 1. Methodology and evaluation with station temperature.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(6). |
MLA | Jimenez, C.,et al."Inversion of AMSR-E observations for land surface temperature estimation: 1. Methodology and evaluation with station temperature".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.6(2017). |
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