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Preformed and regenerated phosphate in ocean general circulation models: can right total concentrations be wrong?

Citation

Duteil, O and Koeve, W and Oschlies, A and Aumont, O and Bianchi, D and Bopp, L and Galbraith, E and Matear, R and Moore, JK and Sarmiento, JL and Segschneider, J, Preformed and regenerated phosphate in ocean general circulation models: can right total concentrations be wrong?, Biogeosciences, 9, (5) pp. 1797-1807. ISSN 1726-4170 (2012) [Refereed Article]


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Copyright 2012 Authors. Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) https://creativecommons.org/licenses/by/3.0/

DOI: doi:10.5194/bg-9-1797-2012

Abstract

Phosphate distributions simulated by seven state-of-the-art biogeochemical ocean circulation models are evaluated against observations of global ocean nutrient distributions. The biogeochemical models exhibit different structural complexities, ranging from simple nutrient-restoring to multi-nutrient NPZD type models. We evaluate the simulations using the observed volume distribution of phosphate. The errors in these simulated volume class distributions are significantly larger when preformed phosphate (or regenerated phosphate) rather than total phosphate is considered. Our analysis reveals that models can achieve similarly good fits to observed total phosphate distributions for a~very different partitioning into preformed and regenerated nutrient components. This has implications for the strength and potential climate sensitivity of the simulated biological carbon pump. We suggest complementing the use of total nutrient distributions for assessing model skill by an evaluation of the respective preformed and regenerated nutrient components.

Item Details

Item Type:Refereed Article
Keywords:biogeochemistry, biological pump, concentration (composition), error analysis, global ocean numerical model, oceanic general circulation model, phosphate
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Oceanic processes (excl. in the Antarctic and Southern Ocean)
UTAS Author:Matear, R (Dr Richard Matear)
ID Code:119024
Year Published:2012
Web of Science® Times Cited:32
Deposited By:Oceans and Cryosphere
Deposited On:2017-07-25
Last Modified:2017-08-28
Downloads:118 View Download Statistics

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