Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification
Carbon dioxide removal and solar radiation modification (SRM) are two classes of proposed climate intervention methods. A thorough understanding of climate system response to these methods calls for a good understanding of the carbon cycle response. In this study, we used an Earth system model to ex...
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Online Access: | https://doi.org/10.1016/j.accre.2023.03.002 https://doaj.org/article/eb5ba9b5797b478891543899cbdfc1f2 |
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ftdoajarticles:oai:doaj.org/article:eb5ba9b5797b478891543899cbdfc1f2 2023-06-18T03:42:25+02:00 Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification Xiao-Yu Jin Long Cao 2023-04-01T00:00:00Z https://doi.org/10.1016/j.accre.2023.03.002 https://doaj.org/article/eb5ba9b5797b478891543899cbdfc1f2 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S1674927823000357 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.03.002 https://doaj.org/article/eb5ba9b5797b478891543899cbdfc1f2 Advances in Climate Change Research, Vol 14, Iss 2, Pp 322-334 (2023) Carbon dioxide removal Solar radiation modification Geoengineering Carbon cycle Ocean acidification Meteorology. Climatology QC851-999 Social sciences (General) H1-99 article 2023 ftdoajarticles https://doi.org/10.1016/j.accre.2023.03.002 2023-06-04T00:37:51Z Carbon dioxide removal and solar radiation modification (SRM) are two classes of proposed climate intervention methods. A thorough understanding of climate system response to these methods calls for a good understanding of the carbon cycle response. In this study, we used an Earth system model to examine the response of global climate and carbon cycle to artificial ocean alkalinization (AOA), a method of CO2 removal, and reduction in solar irradiance that represents the overall effect of solar radiation modification. In our simulations, AOA is applied uniformly over the global ice-free ocean under the RCP8.5 scenario to bring down atmospheric CO2 to the level of RCP4.5, and SRM is applied uniformly over the globe under the RCP8.5 scenario to bring down global mean surface temperature to the level of RCP4.5. Our simulations show that with the same goal of temperature stabilization, AOA and SRM cause fundamentally different perturbations of the ocean and land carbon cycle. By the end of the 21st century, relative to the simulation of RCP8.5, AOA-induced changes in ocean carbonate chemistry enhances global oceanic CO2 uptake by 983 PgC and increases global mean surface ocean pH by 0.42. Meanwhile, AOA reduces land CO2 uptake by 79 PgC and reduces atmospheric CO2 concentration by 426 × 10−6. By contrast, relative to the simulation of RCP8.5, SRM has a minor effect on the oceanic CO2 uptake and ocean acidification. SRM-induced cooling enhances land CO2 uptake by 140 PgC and reduces atmospheric CO2 concentration by 63 × 10−6. A sudden termination of SRM causes a rate of temperature change that is much larger than that of RCP8.5. A sudden termination of AOA causes a rate of temperature change that is comparable to that of RCP8.5 and a rate of ocean acidification that is much larger than that of RCP8.5. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Advances in Climate Change Research 14 2 322 334 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Carbon dioxide removal Solar radiation modification Geoengineering Carbon cycle Ocean acidification Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
spellingShingle |
Carbon dioxide removal Solar radiation modification Geoengineering Carbon cycle Ocean acidification Meteorology. Climatology QC851-999 Social sciences (General) H1-99 Xiao-Yu Jin Long Cao Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
topic_facet |
Carbon dioxide removal Solar radiation modification Geoengineering Carbon cycle Ocean acidification Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
description |
Carbon dioxide removal and solar radiation modification (SRM) are two classes of proposed climate intervention methods. A thorough understanding of climate system response to these methods calls for a good understanding of the carbon cycle response. In this study, we used an Earth system model to examine the response of global climate and carbon cycle to artificial ocean alkalinization (AOA), a method of CO2 removal, and reduction in solar irradiance that represents the overall effect of solar radiation modification. In our simulations, AOA is applied uniformly over the global ice-free ocean under the RCP8.5 scenario to bring down atmospheric CO2 to the level of RCP4.5, and SRM is applied uniformly over the globe under the RCP8.5 scenario to bring down global mean surface temperature to the level of RCP4.5. Our simulations show that with the same goal of temperature stabilization, AOA and SRM cause fundamentally different perturbations of the ocean and land carbon cycle. By the end of the 21st century, relative to the simulation of RCP8.5, AOA-induced changes in ocean carbonate chemistry enhances global oceanic CO2 uptake by 983 PgC and increases global mean surface ocean pH by 0.42. Meanwhile, AOA reduces land CO2 uptake by 79 PgC and reduces atmospheric CO2 concentration by 426 × 10−6. By contrast, relative to the simulation of RCP8.5, SRM has a minor effect on the oceanic CO2 uptake and ocean acidification. SRM-induced cooling enhances land CO2 uptake by 140 PgC and reduces atmospheric CO2 concentration by 63 × 10−6. A sudden termination of SRM causes a rate of temperature change that is much larger than that of RCP8.5. A sudden termination of AOA causes a rate of temperature change that is comparable to that of RCP8.5 and a rate of ocean acidification that is much larger than that of RCP8.5. |
format |
Article in Journal/Newspaper |
author |
Xiao-Yu Jin Long Cao |
author_facet |
Xiao-Yu Jin Long Cao |
author_sort |
Xiao-Yu Jin |
title |
Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
title_short |
Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
title_full |
Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
title_fullStr |
Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
title_full_unstemmed |
Comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
title_sort |
comparison of the carbon cycle and climate response to artificial ocean alkalinization and solar radiation modification |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.accre.2023.03.002 https://doaj.org/article/eb5ba9b5797b478891543899cbdfc1f2 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Advances in Climate Change Research, Vol 14, Iss 2, Pp 322-334 (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674927823000357 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.03.002 https://doaj.org/article/eb5ba9b5797b478891543899cbdfc1f2 |
op_doi |
https://doi.org/10.1016/j.accre.2023.03.002 |
container_title |
Advances in Climate Change Research |
container_volume |
14 |
container_issue |
2 |
container_start_page |
322 |
op_container_end_page |
334 |
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1769008349344432128 |