Impacts of sea spray geoengineering on ocean biogeochemistry.

Partanen, Antti-Ilari, Keller, David P. , Korhonen, Hannele and Matthews, Damon H. (2016) Impacts of sea spray geoengineering on ocean biogeochemistry. Open Access Geophysical Research Letters, 43 (14). pp. 7600-7608. DOI 10.1002/2016GL070111.

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Abstract

We used an earth system model of intermediate complexity to study the effects of Solar Radiation Management (SRM) by sea spray geoengineering on ocean biogeochemistry. SRM slightly decreased global ocean net primary productivity (NPP) relative to the control run. The lower temperatures in the SRM run decreased NPP directly but also indirectly increased NPP in some regions due to changes in nutrient availability resulting from changes in ocean stratification and circulation. Reduced light availability had a minor effect on global total NPP but a major regional effect near the nutrient rich upwelling region off the coast of Peru, where light availability is the main limiting factor for phytoplankton growth in our model. Unused nutrients from regions with decreased NPP also fueled NPP elsewhere. In the context of RCP4.5 simulation used here, SRM decreased ocean carbon uptake due to changes in atmospheric CO2 concentrations, seawater chemistry, NPP, temperature, and ocean circulation.

Document Type: Article
Additional Information: This work was supported by the Emil Aaltonen Foundation, the Academy of Finland (project 250348) and the European Research Council (646857-ECLAIR). The UVic ESCM model was run through Compute Canada network at supercomputer Guillimin of McGill University in Montreal, Canada. Code to calculate Revelle factor was based on the Matlab version of the CO2SYS program (doi: 10.3334/CDIAC/otg.CO2SYS_MATLAB_v1.1). Simulation and input data for this manuscript are available on request from the corresponding author (antti-ilari.partanen@concordia.ca)
Keywords: climate engineering, geoengineering, marine cloud brightening, solar radiation management, SRM, marine biogeochemistry, modelling, climate change
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/2016GL070111
ISSN: 0094-8276
Related URLs:
Date Deposited: 13 Jul 2016 08:32
Last Modified: 01 Feb 2019 14:59
URI: http://oceanrep.geomar.de/id/eprint/33328

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