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Estimating the diffuse attenuation coefficient from optically active constituents in UK marine waters |
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| Authors: | MJ Devlin J Barry DK Mills RJ Gowen J Foden D Sivyer N Greenwood D Pearce P Tett |
| Institution: | 1. Catchment to Reef Research Group, ACTFR, James Cook University, Townsville, Queensland 4811, Australia;2. Centre for Environment, Fisheries and Aquaculture Science, Pakefield Rd, Lowestoft, NR33 0HT, England, UK;3. Aquatic Systems Group, AFESD, Department of Agriculture and Rural Development, Newforge Lane Belfast BT9 5PX, Northern Ireland, UK;4. School of Life and Health Sciences, University of Napier 10 Colinton Road Edinburgh EH10 5DT, Scotland, UK |
| Abstract: | We report a study of the attenuation of submarine Photosynthetically Active Radiation (PAR) in relation to the concentrations of Optically Active Constituents (OACs) in a range of water types around the United Kingdom. 408 locations were visited between August 2004 and December 2005. The diffuse attenuation coefficient (Kd) was estimated from profiles of downwelling PAR. Concentrations of Suspended Particulate Matter (SPM) were measured gravimetrically and concentrations of phytoplankton chlorophyll (chl) were measured by fluorometrically. Chromophoric Dissolved Organic Matter (CDOM) was measured either by fluorescence or as its proxy, salinity. |
| Keywords: | light attenuation suspended particulate matter chlorophyll CDOM |
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