EcoGEnIE 1.0: plankton ecology in the cGEnIE Earth system model
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Published:2018-10-18
Issue:10
Volume:11
Page:4241-4267
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ISSN:1991-9603
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Container-title:Geoscientific Model Development
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language:en
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Short-container-title:Geosci. Model Dev.
Author:
Ward Ben A., Wilson Jamie D.ORCID, Death Ros M., Monteiro Fanny M.ORCID, Yool AndrewORCID, Ridgwell Andy
Abstract
Abstract. We present an extension to the carbon-centric Grid Enabled Integrated Earth
system model (cGEnIE) that explicitly accounts for the growth and
interaction of an arbitrary number of plankton species. The new package
(ECOGEM) replaces the implicit, flux-based parameterisation of the
plankton community currently employed, with explicitly resolved plankton
populations and ecological dynamics. In ECOGEM, any number of plankton
species, with ecophysiological traits (e.g. growth and grazing rates)
assigned according to organism size and functional group (e.g. phytoplankton
and zooplankton) can be incorporated at runtime. We illustrate the
capability of the marine ecology enabled Earth system model
(EcoGEnIE) by comparing results from one configuration of ECOGEM (with eight generic
phytoplankton and zooplankton size classes) to climatological and seasonal
observations. We find that the new ecological components of the model show
reasonable agreement with both global-scale climatological and local-scale
seasonal data. We also compare EcoGEnIE results to the existing
biogeochemical incarnation of cGEnIE. We find that the resulting global-scale
distributions of phosphate, iron, dissolved inorganic carbon, alkalinity, and
oxygen are similar for both iterations of the model. A slight deterioration
in some fields in EcoGEnIE (relative to the data) is observed, although we
make no attempt to re-tune the overall marine cycling of carbon and nutrients
here. The increased capabilities of EcoGEnIE in this regard will enable
future exploration of the ecological community on much longer timescales than
have previously been examined in global ocean ecosystem models and
particularly for past climates and global biogeochemical cycles.
Funder
European Research Council
Publisher
Copernicus GmbH
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