Primary Production: Sensitivity to Surface Irradiance and Implications for Archiving Data

Platt, T; Sathyendranath, S; White, GN; Jackson, T; Saux Picart, S; Bouman, H. 2017 Primary Production: Sensitivity to Surface Irradiance and Implications for Archiving Data. Frontiers in Marine Science, 4. https://doi.org/10.3389/fmars.2017.00387

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Official URL: https://doi.org/10.3389/fmars.2017.00387

Abstract/Summary

An equation is derived to express the sensitivity of daily, watercolumn production by phytoplankton in the ocean to variations in irradiance at the sea surface. Assuming no spectral effects, and a vertically uniform chlorophyll profile, the sensitivity is a function only of the dimensionless irradiance. Spectral effects can be accounted for as a function of the chlorophyll concentration. At the global scale, the relative reduction in daily production consequent on halving the surface irradiance (representing the expected scope for variation in surface irradiance under natural conditions) is found to be from 30 to 40%. Choice of data source for irradiance may incur a further systematic error of up to 15%. Given that local irradiance (the principal forcing for primary production) may vary from day to day, the issue of how to archive production data for the most generality is discussed and recommendations made in this regard.

Item Type: Publication - Article
Divisions: Plymouth Marine Laboratory > Science Areas > Earth Observation Science and Applications
Depositing User: Kim Hockley
Date made live: 20 Feb 2019 16:05
Last Modified: 20 Feb 2019 16:05
URI: http://plymsea.ac.uk/id/eprint/8136

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