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Regional variations in bio-optical properties of the surface waters in the Southern Ocean

Published online by Cambridge University Press:  12 May 2004

Nicola Fenton ,
Julian Priddle  and
Paul Tett
Nicola Fenton
Affiliation:
School of Ocean Sciences, University of Wales Bangor, Menai Bridge, Anglesey LL59 5EH, UK Scott Polar Research Institute, University of Cambridge, Lensfield Road, Cambridge CB2 1ER, UK
Julian Priddle
Affiliation:
British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET, UK
Paul Tett
Affiliation:
School of Ocean Sciences, University of Wales Bangor, Menai Bridge, Anglesey LL59 5EH, UK
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Abstract

Values of attenuation coefficient, Kd(λ), for five visible wavelengths are reported for 14 sites around South Georgia and the Bransfield Strait, in the Southern Ocean. The mean chlorophyll-plus-phaeopigment concentrations in the upper 30 m of the water column ranged from 0.32–6.633 mg m−3 with one particularly high mean value of 31 mg m−3. Partition of attenuation between chlorophyll (Kc) and other factors in the water column (Ko) indicated that the spectral character of Ko in the Bransfield Strait was consistent with absorption by non chlorophyll-like pigments (Gelbstoff). Values were significantly different between the two areas. Values of the specific attenuation coefficient due to pigment concentration (Kc) were small compared to temperate values. These data support other studies in suggesting that the application of remotely sensed ocean colour data to global biogeochemical surveys requires the development of regional algorithms.

Keywords

Southern Oceanchlorophyllattenuationvariabilityremote sensing
Type
Papers—Life Sciences and Oceanography
Information
Antarctic Science , Volume 6 , Issue 4 , December 1994 , pp. 443 - 448
Copyright
© Antarctic Science Ltd 1994

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