Sensitivity tests of the ocean biogeochemical variables to iron deposition and air temperature
Abstract
Ocean biogeochemical processes represent the key interactions between atmosphere and ocean in the Earth climate system. Here, we investigate the ocean biophysical response to the changes in atmospheric iron deposition and temperature. A suite of numerical experiments are conducted using a newly developed single column ocean model with a biogeochemical module. Simulations show that iron flux enhancement leads to increase in chlorophyll and dissolved oxygen concentrations during boreal summer season. Additionally, future warming experiments predict a decline in the dissolved oxygen, which is mainly caused by the reduced oxygen solubility and biological consumption. Results also show that phytoplankton responses are closely linked to changes in dissolved inorganic carbon concentrations. We discuss the impacts of pollution-induced iron deposition as well as global warming on ocean biogeochemistry.
Acknowledgment: This work was funded by the Korea Meteorological Administration Research and Development Program under Grant KMI2018-03513- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.B51F2001L
- Keywords:
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- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCESDE: 0434 Data sets;
- BIOGEOSCIENCESDE: 1635 Oceans;
- GLOBAL CHANGEDE: 4806 Carbon cycling;
- OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL