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Remote Sens. 2018, 10(9), 1389; https://doi.org/10.3390/rs10091389

Estimation of Size-Fractionated Primary Production from Satellite Ocean Colour in UK Shelf Seas

1
Earth Observation Science and Applications, Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
2
Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK
3
National Centre for Earth Observation, Plymouth Marine Laboratory, West Hoe, Plymouth PL1 3DH, UK
4
Ocean and Earth Sciences, University of Southampton, National Oceanography Centre, Southampton, European Way, Southampton SO14 3ZH, UK
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 26 August 2018 / Accepted: 28 August 2018 / Published: 31 August 2018
(This article belongs to the Special Issue Remote Sensing of Ocean Colour)
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Abstract

Satellite ocean-colour based models of size-fractionated primary production (PP) have been developed for the oceans on a global level. Uncertainties exist as to whether these models are accurate for temperate Shelf seas. In this paper, an existing ocean-colour based PP model is tuned using a large in situ database of size-fractionated measurements from the Celtic Sea and Western English Channel of chlorophyll-a (Chl a) and the photosynthetic parameters, the maximum photosynthetic rate ( P m B ) and light limited slope ( α B ). Estimates of size fractionated PP over an annual cycle in the UK shelf seas are compared with the original model that was parameterised using in situ data from the open ocean and a climatology of in situ PP from 2009 to 2015. The Shelf Sea model captured the seasonal patterns in size-fractionated PP for micro- and picophytoplankton, and generally performed better than the original open ocean model, except for nanophytoplankton PP which was over-estimated. The overestimation in PP is in part due to errors in the parameterisation of the biomass profile during summer, stratified conditions. Compared to the climatology of in situ data, the shelf sea model performed better when phytoplankton biomass was high, but overestimated PP at low Chl a. View Full-Text
Keywords: Pico; nano; microphytoplankton; size fractionated; photosynthesis; primary production; ocean colour; remote sensing; Shelf seas; Celtic Sea; Western English Channel Pico; nano; microphytoplankton; size fractionated; photosynthesis; primary production; ocean colour; remote sensing; Shelf seas; Celtic Sea; Western English Channel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Curran, K.; Brewin, R.J.W.; Tilstone, G.H.; Bouman, H.A.; Hickman, A. Estimation of Size-Fractionated Primary Production from Satellite Ocean Colour in UK Shelf Seas. Remote Sens. 2018, 10, 1389.

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