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Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi

LYU Heng WANG Qiao WU Chuanqing ZHU Li LI Yunmei HUANG Jiazhu

LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. 中国地理科学, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
引用本文: LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. 中国地理科学, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. Chinese Geographical Science, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
Citation: LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. Chinese Geographical Science, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y

Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi

doi: 10.1007/s11769-014-0689-y
基金项目: Under the auspices of National Natural Science Foundation of China (No. 41171269, 41101378)
详细信息
    通讯作者:

    WANG Qiao. E-mail: wangqiao@sepa.gov.cn

Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi

Funds: Under the auspices of National Natural Science Foundation of China (No. 41171269, 41101378)
More Information
    Corresponding author: WANG Qiao. E-mail: wangqiao@sepa.gov.cn
  • 摘要: This study presents an investigation of the scattering and backscattering properties of the particulates in three Chinese inland lakes (the Taihu Lake, the Chaohu Lake and the Dianchi Lake) based on in situ measurements taken at 119 sites. We modeled the particulate scattering spectra using a wavelength-dependent power-law function, finding that the power-law exponents in the Taihu Lake and the Chaohu Lake differ from those in the Dianchi Lake but are similar to the values in the U.S. coastal waters. In contrast to the open ocean, the backscattering properties in the three lakes can not be determined only from chlorophyll-a concentration. The backscattering ratio spectra exhibit a wavelength dependence feature in all three lakes, generally decreasing with the increasing wavelength. Analysis results of the correlations between the backscattering ratio and the individual water quality parameters clearly show that there are distinctive relations among the three lakes, attributed primarily to different compositions of optically active materials in the three lakes. Analysis of the mass-specific scattering and backscattering coefficients shows that the coefficients at wavelength 532 nm in the Taihu Lake and Chaohu Lake are similar, but they are apparently different from those in the Dianchi Lake. Lastly, Model I multiple linear regressions were adopted to partition the mass-specific cross-sections for scattering and backscattering into organic and inorganic cross-sections to further interpret the scattering and backscattering properties. The relative contribution of organic and inorganic particulates to scattering and backscattering is clearly different among the three lakes. The scattering and backscattering properties of the particulates in the three inland lakes vary significantly based on our collected data. The results indicated that the existing semi-analytical water quality retrieval models of the Taihu Lake can not be applied perfectly to the Chaohu Lake and the Dianchi Lake.
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Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi

doi: 10.1007/s11769-014-0689-y
    基金项目:  Under the auspices of National Natural Science Foundation of China (No. 41171269, 41101378)
    通讯作者: WANG Qiao. E-mail: wangqiao@sepa.gov.cn

摘要: This study presents an investigation of the scattering and backscattering properties of the particulates in three Chinese inland lakes (the Taihu Lake, the Chaohu Lake and the Dianchi Lake) based on in situ measurements taken at 119 sites. We modeled the particulate scattering spectra using a wavelength-dependent power-law function, finding that the power-law exponents in the Taihu Lake and the Chaohu Lake differ from those in the Dianchi Lake but are similar to the values in the U.S. coastal waters. In contrast to the open ocean, the backscattering properties in the three lakes can not be determined only from chlorophyll-a concentration. The backscattering ratio spectra exhibit a wavelength dependence feature in all three lakes, generally decreasing with the increasing wavelength. Analysis results of the correlations between the backscattering ratio and the individual water quality parameters clearly show that there are distinctive relations among the three lakes, attributed primarily to different compositions of optically active materials in the three lakes. Analysis of the mass-specific scattering and backscattering coefficients shows that the coefficients at wavelength 532 nm in the Taihu Lake and Chaohu Lake are similar, but they are apparently different from those in the Dianchi Lake. Lastly, Model I multiple linear regressions were adopted to partition the mass-specific cross-sections for scattering and backscattering into organic and inorganic cross-sections to further interpret the scattering and backscattering properties. The relative contribution of organic and inorganic particulates to scattering and backscattering is clearly different among the three lakes. The scattering and backscattering properties of the particulates in the three inland lakes vary significantly based on our collected data. The results indicated that the existing semi-analytical water quality retrieval models of the Taihu Lake can not be applied perfectly to the Chaohu Lake and the Dianchi Lake.

English Abstract

LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. 中国地理科学, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
引用本文: LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. 中国地理科学, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. Chinese Geographical Science, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
Citation: LYU Heng, WANG Qiao, WU Chuanqing, ZHU Li, LI Yunmei, HUANG Jiazhu. Variations in Optical Scattering and Backscattering by Organic and Inorganic Particulates in Chinese Lakes of Taihu, Chaohu and Dianchi[J]. Chinese Geographical Science, 2015, 25(1): 26-38. doi: 10.1007/s11769-014-0689-y
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