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Retrieval of sea surface temperature from the scanning microwave radiometer aboard HY-2B

机译：从扫描微波辐射计检索海表面温度升级 - 2B

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摘要

The HY-2B satellite, equipped with the scanning microwave radiometer (SMR), was launched on 25 October 2018 and began observation on 30 October 2018. With the SMR data, we retrieved the sea surface temperature (SST), along with the ocean wind speed (OWS), total columnar water vapour (TCWV), and cloud liquid water (TCLW), within an optimal estimation (OE) Framework. Through the comparison with Argo profiling floats data, mean difference of 0.01 degrees C, and standard deviation of 0.47 degrees C are inferred for SST within the latitude range of 60 degrees S-60 degrees N. The contrast against the WindSat standard products also shows an encouraging result, in which the standard deviation for SST, OWS, TCWV, and TCLW are 0.49 degrees C, 0.64 m s(-1), 1.23 mm, and 0.029 mm, respectively. To investigate the effect of oceanic and atmospheric state on SST retrieval, the sensitivities of brightness temperature (TB) at considered frequency to SST, OWS, TCWV, and TCLW are carefully analysed, and seven combinations of SMR frequencies are tested to retrieve different parameters. The results emphasize the importance of low-frequency observations in retrieving accurate SST and suggest that the influence of wind speed and atmospheric vapour content is non-negligible. It is also indicated that the role of the higher frequency (23.8 and 37 GHz) is limited for SST retrieval. This study presents an assessment for SST retrieval from SMR measured data and provides a reference about frequency selection for measuring SST from passive microwave radiometer.
机译：HY-2B卫星配备有扫描微波辐射计（SMR），于2018年10月25日推出，并于2018年10月30日开始观察。通过SMR数据，我们检索海面温度（SST），以及海风。在最佳估计（OE）框架内，速度（OWS），总柱状水蒸气（TCWV）和云液体水（TCLW）。通过与ARGO分析浮子数据的比较，对于0.47度的平均差异，标准偏差在60度S-60度N的纬度范围内推断出SST。对比涡轮at标准产品的对比也显示了一个令人鼓舞的结果，其中SST，OWS，TCWV和TCLW的标准偏差分别为0.49℃，0.64ms（-1），1.23毫米和0.029 mm。为了研究海洋和大气状态对SST检索的影响，仔细分析了亮度温度（TB）的亮度温度（TB）的敏感性，并经过仔细分析SST，OWS，TCWV和TCLW的敏感性，并测试SMR频率的七种组合以检索不同的参数。结果强调了低频观测在检索精确SST方面的重要性，并表明风速和大气蒸汽含量的影响是不可忽略的。还表示，较高频率（23.8和37 GHz）的作用有限于SST检索。本研究介绍了SST检索从SMR测量数据进行评估，并为来自无源微波辐射计测量SST的频率选择提供了参考。

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  • 来源
    《International journal of remote sensing》 |2021年第12期|4621-4643|共23页
  • 作者

    Liu Shu-Bo; Cui Xin-Dong; Li Yi-Nan; Jin Xu; Zhou Wu; Dang Hong-Xing; Li Hao;

  • 作者单位

    China Acad Space Technol Xian Inst Space Radio Technol 504 East Changan St Xian 710000 Shaanxi Peoples R China|Natl Key Lab Sci & Technol Space Microwave Xian Peoples R China;

    Beijing Inst Appl Meteorol Beijing Peoples R China;

    China Acad Space Technol Xian Inst Space Radio Technol 504 East Changan St Xian 710000 Shaanxi Peoples R China;

    China Acad Space Technol Xian Inst Space Radio Technol 504 East Changan St Xian 710000 Shaanxi Peoples R China;

    Natl Satellite Ocean Applicat Serv Beijing Peoples R China;

    China Acad Space Technol Xian Inst Space Radio Technol 504 East Changan St Xian 710000 Shaanxi Peoples R China;

    China Acad Space Technol Xian Inst Space Radio Technol 504 East Changan St Xian 710000 Shaanxi Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sea surface temperature; microwave radiometry; retrievals;

    机译：海表面温度;微波辐射测定;检索;

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