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Acta Optica Sinica, Volume. 42, Issue 9, 0901003(2022)

Analysis of Polarization Radiation Characteristics of Strong Convective Cloud Clusters

Jiajia Wang1,2,3, Rufang Ti1,3、*, Xiao Liu1,3,4, Honglian Huang1,3,4, and Xiaobing Sun1,3,4
Author Affiliations
  • 1Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
  • 2University of Science and Technology of China, Hefei 230036, Anhui, China
  • 3Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei 230031, Anhui, China
  • 4Hefei Chief Expert Studio of Agricultural Industry, Hefei 230031, Anhui, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (13)
    Cited By (2)
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    Figures & Tables(10)
    RGB images of strong convective cloud clusters and non-precipitation cloud clusters. (a) Strong convective cloud clusters; (b) non-precipitation cloud clusters

    Fig. 1. RGB images of strong convective cloud clusters and non-precipitation cloud clusters. (a) Strong convective cloud clusters; (b) non-precipitation cloud clusters

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    Schematic diagram of scattering geometric relation

    Fig. 2. Schematic diagram of scattering geometric relation

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    Strong convective cloud clusters over central and eastern China on July 4, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization reflectance varying with scattering angle

    Fig. 3. Strong convective cloud clusters over central and eastern China on July 4, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization reflectance varying with scattering angle

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    Strong convective cloud clusters over central and eastern China on July 26, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization angle distribution image of 490 nm band

    Fig. 4. Strong convective cloud clusters over central and eastern China on July 26, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization angle distribution image of 490 nm band

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    Typhoon cloud clusters over Atlantic on June 11, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization angle distribution image of 490 nm band

    Fig. 5. Typhoon cloud clusters over Atlantic on June 11, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization angle distribution image of 490 nm band

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    Non-precipitation cloud clusters over central and eastern China on May 28, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization reflectance varying with scattering angle

    Fig. 6. Non-precipitation cloud clusters over central and eastern China on May 28, 2018. (a) RGB image; (b) cloud phase distribution image; (c) polarization reflectance varying with scattering angle

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    Illumination, observation conditions and physical quantities of strong convective cloud clusters on July 4, 2018, non-precipitation cloud clusters on May 28, 2018 and difference value between them in polarization band varying with order of observation angle. (a1)--(a3) Solar zenith angle; (b1)--(b3) observation zenith angle; (c1)--(c3) scattering angle; (d1)--(d3) polarization reflectance; (e1)--(e3) polarization angle

    Fig. 7. Illumination, observation conditions and physical quantities of strong convective cloud clusters on July 4, 2018, non-precipitation cloud clusters on May 28, 2018 and difference value between them in polarization band varying with order of observation angle. (a1)--(a3) Solar zenith angle; (b1)--(b3) observation zenith angle; (c1)--(c3) scattering angle; (d1)--(d3) polarization reflectance; (e1)--(e3) polarization angle

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    Comparison of non-precipitation cloud cluster and strong convective cloud cluster images. (a) Polarization angle image of non-precipitation cloud clusters on July 4, 2018; (b) polarization angle image of strong convective cloud clusters on May 28, 2018

    Fig. 8. Comparison of non-precipitation cloud cluster and strong convective cloud cluster images. (a) Polarization angle image of non-precipitation cloud clusters on July 4, 2018; (b) polarization angle image of strong convective cloud clusters on May 28, 2018

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    • Table 1. Main technical parameters of DPC

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      Table 1. Main technical parameters of DPC

      ParameterDescription
      Spectral band /nm443, 490(P), 565, 670(P), 763, 765, 865(P), 910
      Angle of polarization0°, 60°, 120°
      Polarization detection accuracyBetter than 2%
      Spatial resolution nadir /(km×km)3.29×3.29
      FOV /(°)-50~50
      Number of angles≥9
      Quantization accuracy /bit14

    • Table 2. Mean reflectances of strong convective cloud clusters and non-precipitation cloud clusters varying with central wavelengths

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      Table 2. Mean reflectances of strong convective cloud clusters and non-precipitation cloud clusters varying with central wavelengths

      Central wavelength /nm443490565670763765865910
      Mean reflectance of strong convective cloud clusters /%64.1163.8560.4760.7856.5963.4465.2260.56
      Mean reflectance of non-precipitation cloud clusters /%36.7335.4733.2632.5827.7337.9241.9429.22
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    Jiajia Wang, Rufang Ti, Xiao Liu, Honglian Huang, Xiaobing Sun. Analysis of Polarization Radiation Characteristics of Strong Convective Cloud Clusters[J]. Acta Optica Sinica, 2022, 42(9): 0901003

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    Paper Information

    Category: Atmospheric Optics and Oceanic Optics

    Received: Nov. 10, 2021

    Accepted: Jan. 6, 2022

    Published Online: May. 6, 2022

    The Author Email: Ti Rufang (tirufang@aiofm.ac.cn)

    DOI:10.3788/AOS202242.0901003

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology