Phytoplankton and thermal structure in the upper ocean: Consequences of nonuniformity in chlorophyll profile
Phytoplankton and thermal structure in the upper ocean: Consequences of nonuniformity in chlorophyll profile
复制标题
DOI：
10.1029/jc088ic04p02565
复制
发表时间：
1983-03
影响因子：
--
通讯作者：
M. Lewis;J. Cullen;T. Platt
中科院分区：
文献类型：
--
作者：
M. Lewis;J. Cullen;T. Platt
海洋上层对太阳辐射的吸收受浮游植物浓度的影响。叶绿素（浮游植物）垂直分布的不均匀性导致吸收的不均匀性，从而导致局部加热的变化。局部加热率趋于随深度的增加而单调下降，但叶绿素的某些垂直分布导致梯度的符号变化。来自一个贫营养海洋站的数据显示，次表层叶绿素最大值的强度足以使叶绿素最大值上斜坡的加热增加，最大梯度为0.003°C d−1 m−1。有人建议，这种次表层加热增强垂直混合和影响混合层加深的重要性可能是最大的光学清晰，开放的海洋区域。
Solar irradiance absorption in the upper layers of the ocean is influenced by the concentration of phytoplankton. Nonuniformities in vertical chlorophyll (phytoplankton) distributions lead to nonuniformities in absorption and consequently to variations in local heating. Local heating rate tends to decrease monotonically with increasing depth, but certain vertical distributions of chlorophyll lead to a change of sign of the gradient. Data from an oligotrophic ocean station showed a subsurface maximum of chlorophyll intense enough to allow increased heating on the upper slope of the chlorophyll maximum, with a maximum gradient of 0.003°C d−1 m−1. It is suggested that the importance of such subsurface heating for augmenting vertical mixing and influencing mixed layer deepening may be greatest in the optically clear, open ocean regions.