Geoengineering potential of artificially enhanced silicate weathering of olivine
Geoengineering is a proposed action to manipulate Earths climate in order to counteract global warming from anthropogenic green- house gas emissions. We investigate the potential of a specific geoengineering technique, carbon sequestration by artificially enhanced silicate weathering via the dissolu...
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ftawi:oai:epic.awi.de:21549 2024-09-15T18:28:18+00:00 Geoengineering potential of artificially enhanced silicate weathering of olivine Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter 2010 application/pdf https://epic.awi.de/id/eprint/21549/ https://epic.awi.de/id/eprint/21549/1/Khl2010a.pdf https://doi.org/10.1073/pnas.1000545107 https://hdl.handle.net/10013/epic.36220 https://hdl.handle.net/10013/epic.36220.d001 unknown https://epic.awi.de/id/eprint/21549/1/Khl2010a.pdf https://hdl.handle.net/10013/epic.36220.d001 Köhler, P. orcid:0000-0003-0904-8484 , Hartmann, J. and Wolf-Gladrow, D. orcid:0000-0001-9531-8668 (2010) Geoengineering potential of artificially enhanced silicate weathering of olivine , Proceedings of the National Academy of Sciences of the United States of America, 107(47), 2022820233. . doi:10.1073/pnas.1000545107 <https://doi.org/10.1073/pnas.1000545107> , hdl:10013/epic.36220 EPIC3Proceedings of the National Academy of Sciences of the United States of America, 107(47), 2022820233. Article isiRev 2010 ftawi https://doi.org/10.1073/pnas.1000545107 2024-06-24T04:01:54Z Geoengineering is a proposed action to manipulate Earths climate in order to counteract global warming from anthropogenic green- house gas emissions. We investigate the potential of a specific geoengineering 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 oppose ocean acidification, because it influences the global climate via the carbon cycle. If important details of the marine chemistry are taken into consideration, a new mass ratio of CO2 sequestration per olivine dissolution of about 1 is achieved, 20% smaller than previously assumed. We calculate that this approach has the potential to sequestrate up to 1 Pg of C per year directly, if olivine is distributed as fine powder over land areas of the humid tropics, but this rate 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 se- questration of 0.5 and 0.1 Pg of C per year, but these upper limit sequestration rates come at the environmental cost of pH values in the rivers rising to 8.2. 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 15 Pg of C per year for the 21st century by this technique. Article in Journal/Newspaper Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Proceedings of the National Academy of Sciences 107 47 20228 20233 |
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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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Geoengineering is a proposed action to manipulate Earths climate in order to counteract global warming from anthropogenic green- house gas emissions. We investigate the potential of a specific geoengineering 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 oppose ocean acidification, because it influences the global climate via the carbon cycle. If important details of the marine chemistry are taken into consideration, a new mass ratio of CO2 sequestration per olivine dissolution of about 1 is achieved, 20% smaller than previously assumed. We calculate that this approach has the potential to sequestrate up to 1 Pg of C per year directly, if olivine is distributed as fine powder over land areas of the humid tropics, but this rate 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 se- questration of 0.5 and 0.1 Pg of C per year, but these upper limit sequestration rates come at the environmental cost of pH values in the rivers rising to 8.2. 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 15 Pg of C per year for the 21st century by this technique. |
format |
Article in Journal/Newspaper |
author |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter |
spellingShingle |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter Geoengineering potential of artificially enhanced silicate weathering of olivine |
author_facet |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter |
author_sort |
Köhler, Peter |
title |
Geoengineering potential of artificially enhanced silicate weathering of olivine |
title_short |
Geoengineering potential of artificially enhanced silicate weathering of olivine |
title_full |
Geoengineering potential of artificially enhanced silicate weathering of olivine |
title_fullStr |
Geoengineering potential of artificially enhanced silicate weathering of olivine |
title_full_unstemmed |
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/21549/ https://epic.awi.de/id/eprint/21549/1/Khl2010a.pdf https://doi.org/10.1073/pnas.1000545107 https://hdl.handle.net/10013/epic.36220 https://hdl.handle.net/10013/epic.36220.d001 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Proceedings of the National Academy of Sciences of the United States of America, 107(47), 2022820233. |
op_relation |
https://epic.awi.de/id/eprint/21549/1/Khl2010a.pdf https://hdl.handle.net/10013/epic.36220.d001 Köhler, P. orcid:0000-0003-0904-8484 , Hartmann, J. and Wolf-Gladrow, D. orcid:0000-0001-9531-8668 (2010) Geoengineering potential of artificially enhanced silicate weathering of olivine , Proceedings of the National Academy of Sciences of the United States of America, 107(47), 2022820233. . doi:10.1073/pnas.1000545107 <https://doi.org/10.1073/pnas.1000545107> , hdl:10013/epic.36220 |
op_doi |
https://doi.org/10.1073/pnas.1000545107 |
container_title |
Proceedings of the National Academy of Sciences |
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107 |
container_issue |
47 |
container_start_page |
20228 |
op_container_end_page |
20233 |
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1810469637579603968 |