Climate engineering by artificial ocean upwelling: Channelling the sorcerer's apprentice
Article first published online: 16 FEB 2010
Copyright 2010 by the American Geophysical Union.
Geophysical Research Letters
Volume 37, Issue 4, February 2010
How to Cite
2010), Climate engineering by artificial ocean upwelling: Channelling the sorcerer's apprentice, Geophys. Res. Lett., 37, L04701, doi:10.1029/2009GL041961., , , and (
- Issue published online: 16 FEB 2010
- Article first published online: 16 FEB 2010
- Manuscript Accepted: 19 JAN 2010
- Manuscript Revised: 12 JAN 2010
- Manuscript Received: 30 NOV 2009
- ocean fertilization;
- carbon sequestration
 Recent suggestions to reduce the accumulation of anthropogenic carbon dioxide in the atmosphere have included ocean fertilization by artificial upwelling. Our coupled carbon-climate model simulations suggest that artificial upwelling may, under most optimistic assumptions, be able to sequester atmospheric CO2 at a rate of about 0.9 PgC/yr. However, the model predicts that about 80% of the carbon sequestered is stored on land, as a result of reduced respiration at lower air temperatures brought about by upwelling of cold waters. This remote and distributed carbon sequestration would make monitoring and verification particularly challenging. A second caveat predicted by our simulations is that whenever artificial upwelling is stopped, simulated surface temperatures and atmospheric CO2 concentrations rise quickly and for decades to centuries to levels even somewhat higher than experienced in a world that never engaged in artificial upwelling.