Ocean liming can help achieve the Paris climate target
To stabilize global mean temperature and stay below critical thresholds, deep emission reductions have to be complemented with carbon dioxide removal. A broad portfolio of options is necessary to enable sufficient potential and mitigate sustainability concerns. So far, integrated assessment models h...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/adf12c |
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| _version_ | 1849253948307800064 |
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| author | Jessica Strefler Katarzyna Kowalczyk Verena Hofbauer Tabea Dorndorf Lavinia Baumstark |
| author_facet | Jessica Strefler Katarzyna Kowalczyk Verena Hofbauer Tabea Dorndorf Lavinia Baumstark |
| author_sort | Jessica Strefler |
| collection | DOAJ |
| description | To stabilize global mean temperature and stay below critical thresholds, deep emission reductions have to be complemented with carbon dioxide removal. A broad portfolio of options is necessary to enable sufficient potential and mitigate sustainability concerns. So far, integrated assessment models have almost exclusively considered options on land. In this study, we show that ocean liming can make a substantial contribution to achieving ambitious climate mitigation targets. Due to the expected time needed for scale-up, the deployment potential in the first half of the century is limited, such that ocean liming can hardly reduce peak temperature. However, in the second half of the century, substantial deployment may be economically competitive. In addition, the availability of ocean liming reduces the dependence on other carbon removal options, and specifically on bioenergy. This could reduce the pressure on land and improve the sustainability of ambitious climate mitigation scenarios. However, impacts on the ocean ecosystems are still poorly understood and need to be clarified before deployment. In light of the remaining uncertainties and global and regional limitations, we suggest to limit the maximum global deployment of ocean liming in integrated assessment models to 5 GtCO _2 /yr carbon uptake. |
| format | Article |
| id | doaj-art-dbf0b751c2354b00b3067288149935ea |
| institution | Kabale University |
| issn | 1748-9326 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj-art-dbf0b751c2354b00b3067288149935ea2025-08-20T03:56:10ZengIOP PublishingEnvironmental Research Letters1748-93262025-01-0120909400410.1088/1748-9326/adf12cOcean liming can help achieve the Paris climate targetJessica Strefler0https://orcid.org/0000-0002-5279-4629Katarzyna Kowalczyk1Verena Hofbauer2Tabea Dorndorf3https://orcid.org/0000-0003-1824-898XLavinia Baumstark4https://orcid.org/0000-0002-6979-6671Potsdam Institute for Climate Impact Research (PIK) , member of the Leibniz Association, PO Box 601203, 14412 Potsdam, GermanyPotsdam Institute for Climate Impact Research (PIK) , member of the Leibniz Association, PO Box 601203, 14412 Potsdam, GermanyPotsdam Institute for Climate Impact Research (PIK) , member of the Leibniz Association, PO Box 601203, 14412 Potsdam, GermanyPotsdam Institute for Climate Impact Research (PIK) , member of the Leibniz Association, PO Box 601203, 14412 Potsdam, GermanyPotsdam Institute for Climate Impact Research (PIK) , member of the Leibniz Association, PO Box 601203, 14412 Potsdam, GermanyTo stabilize global mean temperature and stay below critical thresholds, deep emission reductions have to be complemented with carbon dioxide removal. A broad portfolio of options is necessary to enable sufficient potential and mitigate sustainability concerns. So far, integrated assessment models have almost exclusively considered options on land. In this study, we show that ocean liming can make a substantial contribution to achieving ambitious climate mitigation targets. Due to the expected time needed for scale-up, the deployment potential in the first half of the century is limited, such that ocean liming can hardly reduce peak temperature. However, in the second half of the century, substantial deployment may be economically competitive. In addition, the availability of ocean liming reduces the dependence on other carbon removal options, and specifically on bioenergy. This could reduce the pressure on land and improve the sustainability of ambitious climate mitigation scenarios. However, impacts on the ocean ecosystems are still poorly understood and need to be clarified before deployment. In light of the remaining uncertainties and global and regional limitations, we suggest to limit the maximum global deployment of ocean liming in integrated assessment models to 5 GtCO _2 /yr carbon uptake.https://doi.org/10.1088/1748-9326/adf12cIAMclimate changeCDRcarbon dioxide removalnegative emissionsocean |
| spellingShingle | Jessica Strefler Katarzyna Kowalczyk Verena Hofbauer Tabea Dorndorf Lavinia Baumstark Ocean liming can help achieve the Paris climate target Environmental Research Letters IAM climate change CDR carbon dioxide removal negative emissions ocean |
| title | Ocean liming can help achieve the Paris climate target |
| title_full | Ocean liming can help achieve the Paris climate target |
| title_fullStr | Ocean liming can help achieve the Paris climate target |
| title_full_unstemmed | Ocean liming can help achieve the Paris climate target |
| title_short | Ocean liming can help achieve the Paris climate target |
| title_sort | ocean liming can help achieve the paris climate target |
| topic | IAM climate change CDR carbon dioxide removal negative emissions ocean |
| url | https://doi.org/10.1088/1748-9326/adf12c |
| work_keys_str_mv | AT jessicastrefler oceanlimingcanhelpachievetheparisclimatetarget AT katarzynakowalczyk oceanlimingcanhelpachievetheparisclimatetarget AT verenahofbauer oceanlimingcanhelpachievetheparisclimatetarget AT tabeadorndorf oceanlimingcanhelpachievetheparisclimatetarget AT laviniabaumstark oceanlimingcanhelpachievetheparisclimatetarget |