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Estimation of size-fractionated primary production from satellite ocean colour in UK shelf seas

Estimation of size-fractionated primary production from satellite ocean colour in UK shelf seas
Estimation of size-fractionated primary production from satellite ocean colour in UK shelf seas
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 ( PBm ) and light limited slope ( αB ). 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.
2072-4292
1389
Curran, Kieran
992987c5-07fd-40ff-b2f7-0fc510d14ab8
Brewin, Robert
ba552a41-863e-495e-8739-be91409e6dec
Tilstone, Gavin H.
aeda86e7-5b45-457b-ad84-234864ce182f
Bouman, Heather A
5f21cf59-afa4-42be-b826-c1ac2c6730c4
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92
Curran, Kieran
992987c5-07fd-40ff-b2f7-0fc510d14ab8
Brewin, Robert
ba552a41-863e-495e-8739-be91409e6dec
Tilstone, Gavin H.
aeda86e7-5b45-457b-ad84-234864ce182f
Bouman, Heather A
5f21cf59-afa4-42be-b826-c1ac2c6730c4
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92

Curran, Kieran, Brewin, Robert, Tilstone, Gavin H., Bouman, Heather A and Hickman, Anna (2018) Estimation of size-fractionated primary production from satellite ocean colour in UK shelf seas. Remote Sensing, 10 (9), 1389. (doi:10.3390/rs10091389).

Record type: Article

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 ( PBm ) and light limited slope ( αB ). 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.

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Accepted/In Press date: 28 August 2018
e-pub ahead of print date: 31 August 2018
Published date: 31 August 2018

Identifiers

Local EPrints ID: 424526
URI: https://eprints.soton.ac.uk/id/eprint/424526
ISSN: 2072-4292
PURE UUID: 1cc4588c-8290-4fc9-aa8c-1e803cadaee5
ORCID for Anna Hickman: ORCID iD orcid.org/0000-0002-2774-3934

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Date deposited: 05 Oct 2018 11:38
Last modified: 14 Mar 2019 01:36

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