The geoengineering potential of artificially enhanced silicate weathering of olivine
Geoengineering might manipulate Earths climate in order to counteract global warming fromanthropogenic greenhouse gas emissions. We investigate in detail the potential of a specificgeoengineering technique: carbon sequestration by artificially enhanced silicate weathering via the dissolution of oliv...
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ftawi:oai:epic.awi.de:23272 2024-09-15T18:27:58+00:00 The geoengineering potential of artificially enhanced silicate weathering of olivine Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter 2010 https://epic.awi.de/id/eprint/23272/ https://hdl.handle.net/10013/epic.36051 unknown Köhler, P. orcid:0000-0003-0904-8484 , Hartmann, J. and Wolf-Gladrow, D. orcid:0000-0001-9531-8668 (2010) The geoengineering potential of artificially enhanced silicate weathering of olivine , Annual meeting of the Deutsche Gesellschaft für Geowissenschaften (DGG) and the Geologische Vereinigung (GV), and the 8th European Coal Conference, Darmstadt.-13. October 2010. . hdl:10013/epic.36051 EPIC3Annual meeting of the Deutsche Gesellschaft für Geowissenschaften (DGG) and the Geologische Vereinigung (GV), and the 8th European Coal Conference, Darmstadt.-13. October 2010., 10 Conference notRev 2010 ftawi 2024-06-24T04:02:26Z Geoengineering might manipulate Earths climate in order to counteract global warming fromanthropogenic greenhouse gas emissions. We investigate in detail the potential of a specificgeoengineering technique: carbon sequestration by artificially enhanced silicate weathering via the dissolution of olivine. This approach would not only operate against rising temperatures but would also counteract ocean acidification, because it influences the global climate via the carbon cycle.We here show the consequences of this technique for the chemistry of the surface ocean at rates necessary for geoengineering. We calculate that olivine dissolution has the potential tosequestrate up to 1 Pg C yr-1 directly, if olivine is distributed as fine powder over land areas of the humid tropics. The carbon sequestration potential in soils is limited by the saturation concentration of silicic acid. In our calculations for the Amazon and Congo river catchments, a maximum annual dissolution of 1.8 and 0.4 Pg of olivine seems possible, corresponding to the sequestration of 0.5 and 0.1 Pg C yr-1. Open water dissolution of fine grained olivine and an enhancement of the biological pump by the rising riverine input of silicic acid might increase our estimate of the carbon sequestration, but additional research is needed here. We finally calculate with a carbon cycle model the consequences of sequestration rates of 1 to 5 Pg C yr-1 for the 21st century by this technique. At maximum, enhanced weathering of olivine powder in the humid tropics could reduce global warming by 1 K and counteract ocean acidification by a rise in surface ocean pH by 0.1 in the year 2100. Conference Object Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Geoengineering might manipulate Earths climate in order to counteract global warming fromanthropogenic greenhouse gas emissions. We investigate in detail the potential of a specificgeoengineering technique: carbon sequestration by artificially enhanced silicate weathering via the dissolution of olivine. This approach would not only operate against rising temperatures but would also counteract ocean acidification, because it influences the global climate via the carbon cycle.We here show the consequences of this technique for the chemistry of the surface ocean at rates necessary for geoengineering. We calculate that olivine dissolution has the potential tosequestrate up to 1 Pg C yr-1 directly, if olivine is distributed as fine powder over land areas of the humid tropics. The carbon sequestration potential in soils is limited by the saturation concentration of silicic acid. In our calculations for the Amazon and Congo river catchments, a maximum annual dissolution of 1.8 and 0.4 Pg of olivine seems possible, corresponding to the sequestration of 0.5 and 0.1 Pg C yr-1. Open water dissolution of fine grained olivine and an enhancement of the biological pump by the rising riverine input of silicic acid might increase our estimate of the carbon sequestration, but additional research is needed here. We finally calculate with a carbon cycle model the consequences of sequestration rates of 1 to 5 Pg C yr-1 for the 21st century by this technique. At maximum, enhanced weathering of olivine powder in the humid tropics could reduce global warming by 1 K and counteract ocean acidification by a rise in surface ocean pH by 0.1 in the year 2100. |
format |
Conference Object |
author |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter |
spellingShingle |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter The geoengineering potential of artificially enhanced silicate weathering of olivine |
author_facet |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter |
author_sort |
Köhler, Peter |
title |
The geoengineering potential of artificially enhanced silicate weathering of olivine |
title_short |
The geoengineering potential of artificially enhanced silicate weathering of olivine |
title_full |
The geoengineering potential of artificially enhanced silicate weathering of olivine |
title_fullStr |
The geoengineering potential of artificially enhanced silicate weathering of olivine |
title_full_unstemmed |
The geoengineering potential of artificially enhanced silicate weathering of olivine |
title_sort |
geoengineering potential of artificially enhanced silicate weathering of olivine |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/23272/ https://hdl.handle.net/10013/epic.36051 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Annual meeting of the Deutsche Gesellschaft für Geowissenschaften (DGG) and the Geologische Vereinigung (GV), and the 8th European Coal Conference, Darmstadt.-13. October 2010., 10 |
op_relation |
Köhler, P. orcid:0000-0003-0904-8484 , Hartmann, J. and Wolf-Gladrow, D. orcid:0000-0001-9531-8668 (2010) The geoengineering potential of artificially enhanced silicate weathering of olivine , Annual meeting of the Deutsche Gesellschaft für Geowissenschaften (DGG) and the Geologische Vereinigung (GV), and the 8th European Coal Conference, Darmstadt.-13. October 2010. . hdl:10013/epic.36051 |
_version_ |
1810469271928569856 |