Geo- and Climate Science (Summary)

Ocean Biogeochemistry in the context of climate engineering

 

Author
Ilyina, Tatiana Opens window for sending emaile-mail

 

Department
The Ocean in the Earth Ssystem (Prof. Dr. Jochem Marotzke)

 

Abstract
Climate Engineering employs technical methods to mitigate climate change without lowering anthropogenic CO2 emissions. One of these methods, the artificial increase of ocean alkalinity, has been proposed to enhance the oceanic uptake of atmospheric CO2 and counteract the ongoing ocean acidification. We used a global biogeochemical model to show that artificial ocean alkalinity input must be 200 times higher than the input by natural weathering flux to hold the global seawater pH close to today’s value. The effects on ocean biogeochemistry would be substantial.