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Proceedings Paper

Vertical profiles of beam attenuation coefficients in East China Sea
Author(s): Qiong Liu; Delu Pan; Yan Bai; Xuan Zhang; Lin Zhang; Qiankun Zhu
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Paper Abstract

The vertical profiles of beam attenuation coefficient (c) can provide information about the distribution and variability of suspended particles in the water column. Vertical profiles of particulate beam attenuation coefficient at 660 nm (cp(660)), Chlorophyll a (chla) and Particulate Organic Carbon(POC) were analyzed to examine patterns and controlling factors of vertical distributions in the East China Sea (ECS), based on two cruises in summer and late autumn. In late autumn, the cp(660) profiles showed uniform distribution with depth in most of shelf regions, and high value of cp(660) was observed in some inshore stations caused by strong resuspension. In summer, cp(660) exhibited weak subsurface maxima phenomenon in outer shelf, while with the well vertical mixed structures in the northern coast areas of ECS. The variability of cp(660) between summer and autumn were mainly influenced by the changes of thermocline distribution in the ECS. In the late autumn, water potential density were characterized as fully vertical mixed, on the contrary, the strong stratifications of water column were observed in summer. Except for several inshore stations with highly influenced by terrestrial input, significant relationships between POC and cP(660) were observed in both late autumn and summer. The close relationship between POC and cp(660) could be an potential application to retrieve the POC profiles from in situ cP(660) measurements, and be applied to the surface POC estimated from space.

Paper Details

Date Published: 19 October 2012
PDF: 9 pages
Proc. SPIE 8532, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2012, 85320X (19 October 2012); doi: 10.1117/12.974324
Show Author Affiliations
Qiong Liu, The Second Institute of Oceanography, SOA (China)
Wuhan Univ. (China)
Delu Pan, The Second Institute of Oceanography, SOA (China)
Wuhan Univ. (China)
Yan Bai, The Second Institute of Oceanography, SOA (China)
Xuan Zhang, The Second Institute of Oceanography, SOA (China)
Lin Zhang, The Second Institute of Oceanography, SOA (China)
Qiankun Zhu, The Second Institute of Oceanography, SOA (China)


Published in SPIE Proceedings Vol. 8532:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2012
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt; Caroline Nichol; Dave Cowley; Jean-Paul Bruyant, Editor(s)

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