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首页> 外文期刊>Oceanologia >Distributions of photosynthetic and photoprotecting pigment concentrations in the water column in the Baltic Sea: an improved mathematical description
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Distributions of photosynthetic and photoprotecting pigment concentrations in the water column in the Baltic Sea: an improved mathematical description

机译：波罗的海水柱中光合和光防护色素的浓度分布：改进的数学描述

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Summary Mathematical formulas are given to describe the changes with depth of concentrations of chlorophylls b , c , and photosynthetic and photoprotecting carotenoids in Baltic phytoplankton resulting from the adaptation of algal cells to ambient conditions. They take into account the spectral variability and differences in intensity, characteristic of the Baltic, in the irradiance penetrating the water, and also the spectral similarities among the spectra of different groups of phytoplankton pigments. The formulas were derived and validated on the basis of an extensive set of empirical data acquired from different parts of the Baltic Sea in 1999–2016. The standard error factor x of these formulas ranges from 1.32 to 1.73. These values are lower than those obtained for formulas derived for ocean waters, in which the influence of allogenic constituents on optical properties is negligibly small: 1.44 and 1.52 respectively in the case of chlorophyll c , and 1.32 and 1.47 respectively for photoprotecting carotenoids. With these formulas, overall levels of the main groups of pigments can be calculated from known irradiance conditions and chlorophyll a concentrations at any depth in a layer equal to one and a half thicknesses of the euphotic layer (i.e. to an optical depth of τ ?=?7) in the Baltic. The accuracy of these approximations is close to that of estimates of other bio-optical characteristics in this sea. This was confirmed by a validation based on an independent dataset ( x from 1.27 to 1.84).
机译：总结给出了数学公式来描述藻类细胞适应环境条件导致的波罗的海浮游植物中叶绿素b，c以及光合和光保护类胡萝卜素浓度随深度的变化。他们考虑到了光谱变异性和强度的差异，波罗的海的特征，渗透水的辐射以及不同种类浮游植物色素的光谱之间的光谱相似性。这些公式是在1999-2016年从波罗的海不同地区获得的大量经验数据的基础上推导和验证的。这些公式的标准误差因子x为1.32至1.73。这些值低于从海水中得出的公式获得的值，在该公式中，同种异体成分对光学性能的影响可以忽略不计：叶绿素c分别为1.44和1.52，光保护类胡萝卜素分别为1.32和1.47。使用这些公式，可以根据已知的辐照条件和层中任何深度的叶绿素a浓度（等于共光层厚度的一半或一半）（即光学深度τ= 7）在波罗的海。这些近似值的精度接近该海中其他生物光学特性的估计值。通过基于独立数据集的验证（x从1.27到1.84）证实了这一点。

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