Geoengineering potential of artificially enhanced silicate weathering of olivine
Geoengineering is a proposed action to manipulate Earth’s climate in order to counteract global warming from anthropogenic greenhouse gas emissions. We investigate the potential of a specific geoengineering technique, carbon sequestration by artificially enhanced silicate weathering via the dissolut...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
National Academy of Sciences
2010
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996662 http://www.ncbi.nlm.nih.gov/pubmed/21059941 https://doi.org/10.1073/pnas.1000545107 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:2996662 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:2996662 2023-05-15T17:51:41+02:00 Geoengineering potential of artificially enhanced silicate weathering of olivine Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter A. 2010-11-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996662 http://www.ncbi.nlm.nih.gov/pubmed/21059941 https://doi.org/10.1073/pnas.1000545107 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996662 http://www.ncbi.nlm.nih.gov/pubmed/21059941 http://dx.doi.org/10.1073/pnas.1000545107 Freely available online through the PNAS open access option. Physical Sciences Text 2010 ftpubmed https://doi.org/10.1073/pnas.1000545107 2013-09-03T08:24:33Z Geoengineering is a proposed action to manipulate Earth’s climate in order to counteract global warming from anthropogenic greenhouse 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 sequestration 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 1–5 Pg of C per year for the 21st century by this technique. Text Ocean acidification PubMed Central (PMC) Proceedings of the National Academy of Sciences 107 47 20228 20233 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Physical Sciences |
spellingShingle |
Physical Sciences Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter A. Geoengineering potential of artificially enhanced silicate weathering of olivine |
topic_facet |
Physical Sciences |
description |
Geoengineering is a proposed action to manipulate Earth’s climate in order to counteract global warming from anthropogenic greenhouse 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 sequestration 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 1–5 Pg of C per year for the 21st century by this technique. |
format |
Text |
author |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter A. |
author_facet |
Köhler, Peter Hartmann, Jens Wolf-Gladrow, Dieter A. |
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 |
publisher |
National Academy of Sciences |
publishDate |
2010 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996662 http://www.ncbi.nlm.nih.gov/pubmed/21059941 https://doi.org/10.1073/pnas.1000545107 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996662 http://www.ncbi.nlm.nih.gov/pubmed/21059941 http://dx.doi.org/10.1073/pnas.1000545107 |
op_rights |
Freely available online through the PNAS open access option. |
op_doi |
https://doi.org/10.1073/pnas.1000545107 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
107 |
container_issue |
47 |
container_start_page |
20228 |
op_container_end_page |
20233 |
_version_ |
1766158895896592384 |