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首页> 外文会议>Remote sensing for agriculture, ecosystems, and hydrology XIII >Validation of MODIS land surface temperature products using ground measurements in the Heine River Basin, China
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Validation of MODIS land surface temperature products using ground measurements in the Heine River Basin, China

机译：利用中国海涅河流域的地面测量结果验证MODIS地表温度产品的有效性

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摘要

It is very necessary to validate MODIS land surface temperature (LST) for its application, especially in the arid and semi-arid regions. In this study, the Terra and Aqua MODIS 1km daily LST products (MOD/MYD11A1) are validated using ground based longwave radiation observation. The longwave radiation ground measurements during 2008 to 2009 were collected from four automatic weather stations in the Heihe River Basin. In this validation process, the land surface broadband emissivities of the validation stations were obtained from ASTER Spectral library. Then the ground-measured LSTs of validation stations were converted from surface longwave radiation based on Stefan-Boltzmann's law and thermal radioactive transfer theory. The validation results indicated that: except for DYKGT station, the mean bias was less then 1K and the mean absolute error (MAE) range was about 2-3K; MYD11A1 LSTs from Aqua have larger biases, MAEs, and RMSDs than that of MOD11A1 LSTs from Terra in most cases. The comparisons with ground measured LSTs show that the MAEs and RMSDs from daytime MOD/MYD11 Al comparisons are larger than that from nighttime MOD/MYD11A1 comparisons.
机译：验证MODIS地表温度（LST）的应用非常必要，尤其是在干旱和半干旱地区。在这项研究中，Terra和Aqua MODIS每天1公里的LST产品（MOD / MYD11A1）已使用基于地面的长波辐射观测进行了验证。从黑河流域的四个自动气象站收集了2008年至2009年的长波辐射地面测量数据。在此验证过程中，验证站的地面宽带发射率是从ASTER光谱库中获得的。然后根据Stefan-Boltzmann定律和热放射性转移理论，从地面长波辐射转换验证站的地面测量LST。验证结果表明：除DYKGT测站外，平均偏差小于1K，平均绝对误差（MAE）范围约为2-3K。在大多数情况下，与Terra的MOD11A1 LST相比，Aqua的MYD11A1 LST具有更大的偏差，MAE和RMSD。与地面测量的LST的比较表明，白天MOD / MYD11A1比较的MAE和RMSD大于夜间MOD / MYD11A1比较的MAE和RMSD。

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  • 来源
  • 会议地点 Prague(CZ)
  • 作者

    Wenping Yu; Mingguo Ma; Xufeng Wang; Yi Song; Junlei Tan;

  • 作者单位

    Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;

    Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境遥感;
  • 关键词

    MODIS; validation; longwave radiation; heihe river basin; land surface temperature;

    机译：MODIS;验证；长波辐射黑河流域地表温度;

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