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Impacts of sea spray geoengineering on ocean biogeochemistry
Author(s) -
Partanen AnttiIlari,
Keller David P.,
Korhonen Hannele,
Matthews H. Damon
Publication year - 2016
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2016gl070111
Subject(s) - biogeochemistry , environmental science , upwelling , oceanography , phytoplankton , seawater , context (archaeology) , nutrient , primary production , ocean current , atmospheric sciences , ecosystem , geology , chemistry , ecology , paleontology , organic chemistry , biology
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 CO 2 concentrations, seawater chemistry, NPP, temperature, and ocean circulation.