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Sensitivity of global ocean biogeochemical dynamics to ecosystem structure in a future climate

By Manfredi Manizza, Erik T. Buitenhuis and Corinne Le Quéré

Abstract

Terrestrial and oceanic ecosystem components of the Earth System models (ESMs) are key to predict the future behavior of the global carbon cycle. Ocean ecosystem models represent low complexity compared to terrestrial ecosystem models. In this study we use two ocean biogeochemical models based on the explicit representation of multiple planktonic functional types. We impose to the models the same future physical perturbation and compare the response of ecosystem dynamics, export production (EP) and ocean carbon uptake (OCU) to the same physical changes. Models comparison shows that: (1) EP changes directly translate into changes of OCU on decadal time scale, (2) the representation of ecosystem structure plays a pivotal role at linking OCU and EP, (3) OCU is highly sensitive to representation of ecosystem in the Equatorial Pacific and Southern Oceans

Topics: Marine Sciences, Meteorology and Climatology, Ecology and Environment
Publisher: American Geophysical Union
Year: 2010
DOI identifier: 10.1029/2010GL043360
OAI identifier: oai:nora.nerc.ac.uk:10849

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