Simple Global Ocean Biogeochemistry with Light, Iron, Nutrients and Gas version 2 (BLINGv2): Model description and simulation characteristics in GFDL's CM4.0

Dunne, J. P.; Bociu, I.; Bronselaer, B.; Guo, H.; John, J. G.; Krasting, J. P.; Stock, C. A.; Winton, M.; Zadeh, N.

doi:10.1029/2019MS002008

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Simple Global Ocean Biogeochemistry with Light, Iron, Nutrients and Gas version 2 (BLINGv2): Model description and simulation characteristics in GFDL's CM4.0

2020
By Dunne, J. P. ; Bociu, I. ; Bronselaer, B. ; ...
Source: Journal of Advances in Modeling Earth Systems, 12, e2019MS002008.

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Details:

Journal Title:

Journal of Advances in Modeling Earth Systems
Personal Author:

Dunne, J. P. ; Bociu, I. ; Bronselaer, B. ; Guo, H. ; John, J. G. ; ... More +

Dunne, J. P. ; Bociu, I. ; Bronselaer, B. ; Guo, H. ; John, J. G. ; Krasting, J. P. ; Stock, C. A. ; Winton, M. ; Zadeh, N. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; CIMES (Cooperative Institute for Modeling the Earth System)

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; CIMES (Cooperative Institute for Modeling the Earth System) Less -
Description:

Simulation of coupled carbon‐climate requires representation of ocean carbon cycling, but the computational burden of simulating the dozens of prognostic tracers in state‐of‐the‐art biogeochemistry ecosystem models can be prohibitive. We describe a six‐tracer biogeochemistry module of steady‐state phytoplankton and zooplankton dynamics in Biogeochemistry with Light, Iron, Nutrients and Gas (BLING version 2) with particular emphasis on enhancements relative to the previous version and evaluate its implementation in Geophysical Fluid Dynamics Laboratory's (GFDL) fourth‐generation climate model (CM4.0) with ¼° ocean. Major geographical and vertical patterns in chlorophyll, phosphorus, alkalinity, inorganic and organic carbon, and oxygen are well represented. Major biases in BLINGv2 include overly intensified production in high‐productivity regions at the expense of productivity in the oligotrophic oceans, overly zonal structure in tropical phosphorus, and intensified hypoxia in the eastern ocean basins as is typical in climate models. Overall, while BLINGv2 structural limitations prevent sophisticated application to plankton physiology, ecology, or biodiversity, its ability to represent major organic, inorganic, and solubility pumps makes it suitable for many coupled carbon‐climate and biogeochemistry studies including eddy interactions in the ocean interior. We further overview the biogeochemistry and circulation mechanisms that shape carbon uptake over the historical period. As an initial analysis of model historical and idealized response, we show that CM4.0 takes up slightly more anthropogenic carbon than previous models in part due to enhanced ventilation in the absence of an eddy parameterization. The CM4.0 biogeochemistry response to CO2 doubling highlights a mix of large declines and moderate increases consistent with previous models.
Keywords:

[+]

Carbon Cycle Model Ocean Biogeochemistry
Source:

Journal of Advances in Modeling Earth Systems, 12, e2019MS002008.
DOI:

https://doi.org/10.1029/2019MS002008
Document Type:

Journal Article
Rights Information:

CC BY-NC-ND
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Submitted
Main Document Checksum:

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urn:sha256:6a773af8586b1e14f08950279865be0c6b8fdbfe539d6d21c0db17c2e9014f36
Download URL:

https://repository.library.noaa.gov/view/noaa/29687/noaa_29687_DS1.pdf
File Type:

esgf-llnl

htm

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