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https://doi.org/10.5194/bg-2018-348
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-2018-348
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 27 Aug 2018

Submitted as: research article | 27 Aug 2018

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This preprint has been withdrawn by the authors.

Spatial pattern of Kd(PAR) and its relationship with light absorption of optically active components in inland waters across China

Zhidan Wen1, Kaishan Song1, Chong Fang1, Qian Yang2, Ge Liu1, Yingxin Shang1, and Xiaodi Wang3 Zhidan Wen et al.
  • 1Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
  • 2Jilin Jianzhu University, Changchun 130118, China
  • 3Harbin university, Harbin 150086, China

Abstract. The spatial distribution of the attenuation of photosynthetic active radiation (Kd(PAR)) was routinely estimated in China lakes and reservoirs. Higher mean value of Kd(PAR) was observed in Northeastern plain and mountainous region (NER). A linear model is used to predict Kd(PAR), as a function of light absorption coefficient of pigment particulates (aphy), colored dissolved organic matters (aCDOM), and inorganic particulate matters (aNAP): Kd(PAR) = 0.41 + 0.57 × aCDOM + 0.96 × aNAP + 0.57 × aphy (R2 = 0.87, n = 741, p < 0.001). Spatial Kd(PAR) was relatively dependent on the inorganic particulate matters (average relative contribution of 57.95 %). When only consider the contribution of absorption of aOACs to Kd(PAR), the results found that the aOACs could explain 70 %–87 % of Kd(PAR) variations. In the lakes with low TSM concentration and non-eutrophic lakes with high TSM, aCDOM was the most powerful predicting factor on Kd(PAR). In eutrophic lakes with high TSM, aNAP had the most significant impact on Kd(PAR). This study allowed Kd(PAR) to be predicted from aOACs values in the inland waters. Besides, results of this study are suggesting that new studies on the variability of Kd(PAR) in inland waters must consider the hydrodynamic conditions, trophic status and the distribution of optically active components within the water column.

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Zhidan Wen et al.
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Zhidan Wen et al.
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Short summary
The spatial distribution of the attenuation of photosynthetic active radiation (Kd(PAR)) was routinely estimated in China lakes and reservoirs. The light absorption coefficient of OACs could explain 70 %–87 % of Kd(PAR) variations. Kd(PAR) could be predicted from aOACs values in the inland waters. Besides, results of this study are suggesting that new studies on the variability of Kd(PAR) in inland waters must consider the hydrodynamic conditions, trophic status and OACs within the water column.
The spatial distribution of the attenuation of photosynthetic active radiation (Kd(PAR)) was...
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