CDOM absorption characteristics with relation to fluorescence and salinity in coastal areas of the southern Baltic Sea
CDOM absorption characteristics with relation to fluorescence and salinity in coastal areas of the southern Baltic Sea
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DOI：
10.1006/ecss.1997.0309
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发表时间：
1998-07-01
影响因子：
2.8
通讯作者：
Dowell, MD
中科院分区：
文献类型：
--
作者：
Ferrari, GM;Dowell, MD
在高动态的沿海环境中，介绍了色性溶解有机物（CDOM）的吸收测量及其与荧光和盐度的关系。这些结果是在1994年波罗的海南部的季节性游轮的背景下获得的。它们包含了所考虑的环境中存在的地球物理参数的大梯度。比较了CDOM荧光归一化的不同方法。本文提出的方法给出了整个数据集的荧光与吸收之间的线性关系，其中CDOM的吸收范围为1.4-12.8 m(-1)，在355nm处平均为2.26 m（-1）。建立CDOM吸收和荧光关系是有用的，因为吸收可以从荧光测量中推断出来，荧光测量比吸收更快，灵敏度更高。在地表水中，CDOM的吸收与盐度之间存在显著的关系。这两个变量的相关性在春季垂直混合和大陆径流大量输入期间尤为明显，反映了吸收CDOM的潜力。作为淡水输入的被动示踪剂。精确的CDOM吸收测量也可用于遥感算法的定义以及反射率和模型的开发和验证。(C) 1998学术出版社。
Chromophoric dissolved organic matter (CDOM) absorption measurements and their relationship with fluorescence and salinity are presented for a highly dynamic coastal environment. The results were obtained in the context of seasonal cruises in 1994 in the southern Baltic Sea. They encompass the large gradient of geophysical parameters existing in the environment considered.Comparison of different methods for the normalization of CDOM fluorescence are considered. The method suggested here gives a linear relationship between fluorescence and absorption for the whole data set, where CDOM absorption has a range of 1.4-12.8 m(-1) with an average of 2.26 m(-1) at 355 nm. Establishing CDOM absorption and fluorescence relationships is useful because absorption could therefore be inferred from fluorescence measurements which can be acquired more rapidly and with greater sensitivity than absorption.A significant relationship was identified between CDOM absorption and salinity in surface waters. The dependency of these two variables is especially evident in spring during periods of vertical mixing and large input from continental runoff, reflecting the potential of CDOM absorption to be used. as a passive tracer of freshwater input. Accurate CDOM absorption measurements are also of use in the definition of remote sensing algorithms and in reflectance and model development and validation. (C) 1998 Academic Press.