Name: Northern Benguela shelf and open ocean seasonal mean picophytoplankton proportion time series, 1997 to 2018
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.10000006

Title	Northern Benguela shelf and open ocean seasonal mean picophytoplankton proportion time series, 1997 to 2018
Project	Bio-optical Investigation of Phytoplankton
Authors	Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, tarron.lamont@gmail.com R.G. Barlow Bayworld Centre for Research and Education Marine Scientist 5 Riesling Road, Constantia, Cape Town, South Africa, rgb.barlow@gmail.com R.J.W. Brewin Plymouth Marine Laboratory Marine Scientist Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom, robr@pml.ac.uk
Publisher	Department of Forestry, Fisheries and the Environment (2019)
Contributors	Contact Person: Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, tarron.lamont@gmail.com
Abstract	Reconstructed seasonal mean picophytoplankton proportion for SeaWiFS and MODIS-Aqua in the Northern Benguela (15-29°S;8-16.8°E) shelf and open ocean regions during austral summer, autumn, winter, and spring. Shelf and open ocean regions have been separated using the GEBCO 1000m isobath.
Methods	A phytoplankton size-class model (Lamont et al. 2018, RSE 204, 617-631) was applied to standard monthly-averaged SeaWiFS and MODIS-Aqua Chlorophyll a concentrations, with a spatial resolution of 9km, to compute fractional contributions of picophytoplankton to the total chlorophyll a in Northern Benguela shelf and open ocean regions. The shelf and open ocean regions were separated using the 1000m GEBCO isobath. Seasonal means were computed by averaging data over a three-month period for each season, defined as austral summer (December, January, February), autumn (March, April, May), winter (June, July, August), and spring (September, October, November). Using the MODIS-Aqua data as the reference dataset, the SeaWiFS values were reconstructed (predicted) within the framework of a Generalized Linear Model, in order to remove the systematic bias between SeaWiFS and MODIS-Aqua values. This data has been processed and published as Lamont et al. (2019) JGR Oceans, 124, 1170-1195 (https://doi.org/10.1029/2018JC014334) - please see this paper for a more detailed methodology.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.10000006 Style Terms of use These data are made available with the express understanding that any such use will properly acknowledge the originator(s) and publisher and cite the accession numbers and/or associated Digital Object Identifiers. Anyone wishing to use these data should properly cite and attribute the data providers listed as authors in the metadata provided with each dataset. It is expected that all the conditions of the data license will be strictly honoured. Use of any material herein should be properly cited using the dataset’s persistent identifiers such as accession numbers and DOIs. I agree to the terms of use
Temporal extent	01 Jan 1997 – 01 Jan 2018
Geographic extent	Northern Benguela, Benguela Upwelling, South African West Coast, South East Atlantic Ocean North: -15.0 South: -29.0 West: 8.0 East: 16.8
Keywords	Agulhas and Somali Current Large Marine Ecosystems, ASCLME, BCLME, Benguela Current Large Marine Ecosystem, bio-optics, Northern Benguela, phytoplankton biomass, picophytoplankton, remote sensing, SOUTH ATLANTIC OCEAN
Related resources	This digital object is referenced by 10.1029/2018JC014334

Cite 10.15493/DEA.MIMS.10000006

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