Remote Senslng and Depth Distribution of Ocean Chlorophyll
Remote Senslng and Depth Distribution of Ocean Chlorophyll
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DOI：
10.3354/meps005359
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发表时间：
1981
影响因子：
2.5
通讯作者：
R. Smith
中科院分区：
文献类型：
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作者：
R. Smith
本说明讨论了根据沿海区彩色扫描仪（Nimbus 7号卫星）数据估算的叶绿素与海洋水柱中叶绿素浓度之间的关系。叶绿素浓度的遥感值虽然有一定的局限性，但可以作为平均水柱叶绿素含量的一个指标。叶绿素图像提供了天气测量，不切实际的，从船舶单独获得，因此可能是相当重要的浮游植物生态。已经证明，可以对雨云7号卫星上的海岸带彩色扫描仪（CZCS）的数据进行处理，以提供精确度为0.5 log C的海洋区域叶绿素定量图（More 1和Prieur，1977年; Gordon等人，1980; Hovis等人，1980年;史密斯和贝克，提交，1981年）。本说明讨论了从CZCS图像估计的叶绿素与水柱叶绿素浓度之间的关系问题。这个问题是最好的探讨光学衰减长度不同于几何深度。Gordon和McCluney（1975）将Z1定义为光的穿透深度，在该深度以上，90%的漫反射辐照度（不包括镜面反射）产生。他们表明对于一个均匀的海洋
This note considers how chlorophyll, as estimated from Coastal Zone Color Scanner (Nimbus 7 satellite) data, is related to the chlorophyll concentration in the oceanic water column. In spite of some limitations, the remotely sensed chlorophyll concentration can be used a s an index of the mean water column chlorophyll. Chlorophyll imagery provides synoptic measurements, impractical to obtain from ships alone, and hence may be of considerable importance in phytoplankton ecology. It has been demonstrated that data from the Coastal Zone Color Scanner (CZCS) on the Nimbus 7 satellite can be processed to provide quantitative chlorophyll maps of an oceanographic region within an accuracy of 0.5 log C (More1 and Prieur, 1977; Gordon et al., 1980; Hovis et al., 1980; Smith and Baker, submitted, 1981). This note discusses the issue of how chlorophyll, as estimated from CZCS imagery, is related to the water column chlorophyll concentration. The problem is best explored in terms of optical attenuation lengths as distinct from geometrical depths. Gordon and McCluney (1975) defined, Z,,, as the depth of penetration of light above which 90 % of the diffusely reflected irradiance (excluding specular reflectance) originates. They showed that for a homogeneous ocean