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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41508

Title: Absorption coefficients of colored dissolved organic matter in the surface waters of the East China Sea
Authors: Gwo-Ching Gong
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Date: 2004-03
Issue Date: 2017-02-23T03:38:51Z
Publisher: Terrestrial, Atmospheric and Oceanic Sciences7
Abstract: Abstract:Seasonal and spatial variations in the sea surface absorption coefficients of colored dissolved organic matter in the entire shelf of the East showed a decreasing trend from the inner shelf near the China coast toward the 75% of the shelf waters belong to the Case 2 water category. It was ascertained that the entire absorption spectra in the UV (£f= 250nm) to the Visible (£f= 500nm) range could not be well-described when only one single exponential decay function was employed. Four discontinuity points at wavelengths of around 250, 275, 325 and 400 nm in the log-trans-formed absorption spectra were noted. Based on the regressive analysis of a total of 137 absorption spectra, the mean slopes of the exponential decay constant at 250, 275, 325 and 400 nm were 0.018 ¡_ 0.004, 0.025 ¡_ 0.004, 0.015 ¡_ 0.002 and 0.012 ¡_ 0.002 nm-1, respectively. In addition, it was found that the values of the absorption coefficients had a high linear correlation with salinity. This suggests that in terms of mixing, the concentrations of colored dissolved organic matter were mostly conservative. The finding of such a relationship provides researchers with the opportunity to obtain remotely obtain the absorption coefficients of colored dissolved organic matter by using the newly-developed Scanning Low-Frequency Microwave Radiometer (SLFMR) technique.
Relation: 15(1), pp.75-87
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41508
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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