Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate
Geoengineering by injecting sulfur dioxide (SO _2 ) into the lower stratosphere has been suggested to reduce anthropogenically induced warming. While impacts of such geoengineering on climate have been investigated in recent decades, few modeling studies have considered biogeochemical feedbacks resu...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/abacf7 |
| _version_ | 1797747785295986688 |
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| author | Cheng-En Yang Forrest M Hoffman Daniel M Ricciuto Simone Tilmes Lili Xia Douglas G MacMartin Ben Kravitz Jadwiga H Richter Michael Mills Joshua S Fu |
| author_facet | Cheng-En Yang Forrest M Hoffman Daniel M Ricciuto Simone Tilmes Lili Xia Douglas G MacMartin Ben Kravitz Jadwiga H Richter Michael Mills Joshua S Fu |
| author_sort | Cheng-En Yang |
| collection | DOAJ |
| description | Geoengineering by injecting sulfur dioxide (SO _2 ) into the lower stratosphere has been suggested to reduce anthropogenically induced warming. While impacts of such geoengineering on climate have been investigated in recent decades, few modeling studies have considered biogeochemical feedbacks resulting from such intervention. This study comprehensively characterizes responses and feedbacks of terrestrial ecosystems, from an ensemble of coupled high-resolution Earth system model climate change simulations, under the highest standard greenhouse gas scenario with an extreme geoengineering mitigation strategy. Under this strategy, temperature increases beyond 2020 levels due to elevated anthropogenic carbon dioxide (CO _2 ) were completely offset by the SO _2 injection. Carbon cycle feedbacks can alter the trajectory of atmospheric CO _2 levels by storing or releasing additional carbon on land and in the ocean, thus moderating or amplifying climate change. We assess terrestrial biogeochemical feedbacks to climate in response to geoengineering, using model output from the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) project. Results indicate terrestrial ecosystems become a stronger carbon sink globally because of lower ecosystem respiration and diminished disturbance effects under geoengineering. An additional 79 Pg C would be stored on land by the end of the twenty-first century, yielding as much as a 4% reduction in atmospheric CO _2 mole fraction without marine biogeochemical feedbacks, compared to the high greenhouse gas scenario without geoengineering. |
| first_indexed | 2024-03-12T15:55:33Z |
| format | Article |
| id | doaj.art-44d11da1373c447196737a1067c85749 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:55:33Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-44d11da1373c447196737a1067c857492023-08-09T14:54:40ZengIOP PublishingEnvironmental Research Letters1748-93262020-01-01151010404310.1088/1748-9326/abacf7Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climateCheng-En Yang0https://orcid.org/0000-0002-4069-4997Forrest M Hoffman1https://orcid.org/0000-0001-5802-4134Daniel M Ricciuto2https://orcid.org/0000-0002-3668-3021Simone Tilmes3https://orcid.org/0000-0002-6557-3569Lili Xia4https://orcid.org/0000-0001-7821-9756Douglas G MacMartin5https://orcid.org/0000-0003-1987-9417Ben Kravitz6https://orcid.org/0000-0001-6318-1150Jadwiga H Richter7https://orcid.org/0000-0001-7048-0781Michael Mills8https://orcid.org/0000-0002-8054-1346Joshua S Fu9https://orcid.org/0000-0001-5464-9225Department of Civil and Environmental Engineering, University of Tennessee , Knoxville, TN 37996, United States of America; Climate Change Science Institute and Computational Sciences and Engineering Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831, United States of AmericaDepartment of Civil and Environmental Engineering, University of Tennessee , Knoxville, TN 37996, United States of America; Climate Change Science Institute and Computational Sciences and Engineering Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831, United States of AmericaClimate Change Science Institute and Environmental Sciences Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831, United States of AmericaAtmospheric Chemistry, Observations, and Modeling Laboratory, National Center for Atmospheric Research , Boulder, CO 80307, United States of America; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research , Boulder, CO 80307, United States of AmericaDepartment of Environmental Sciences, Rutgers University , New Brunswick, NJ 08901, United States of AmericaSibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, NY 14853, United States of AmericaDepartment of Earth and Atmospheric Sciences, Indiana University , Bloomington, IN 47405, United States of America; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory , Richland, WA 99352, United States of AmericaClimate and Global Dynamics Laboratory, National Center for Atmospheric Research , Boulder, CO 80307, United States of AmericaAtmospheric Chemistry, Observations, and Modeling Laboratory, National Center for Atmospheric Research , Boulder, CO 80307, United States of AmericaDepartment of Civil and Environmental Engineering, University of Tennessee , Knoxville, TN 37996, United States of America; Climate Change Science Institute and Computational Sciences and Engineering Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831, United States of AmericaGeoengineering by injecting sulfur dioxide (SO _2 ) into the lower stratosphere has been suggested to reduce anthropogenically induced warming. While impacts of such geoengineering on climate have been investigated in recent decades, few modeling studies have considered biogeochemical feedbacks resulting from such intervention. This study comprehensively characterizes responses and feedbacks of terrestrial ecosystems, from an ensemble of coupled high-resolution Earth system model climate change simulations, under the highest standard greenhouse gas scenario with an extreme geoengineering mitigation strategy. Under this strategy, temperature increases beyond 2020 levels due to elevated anthropogenic carbon dioxide (CO _2 ) were completely offset by the SO _2 injection. Carbon cycle feedbacks can alter the trajectory of atmospheric CO _2 levels by storing or releasing additional carbon on land and in the ocean, thus moderating or amplifying climate change. We assess terrestrial biogeochemical feedbacks to climate in response to geoengineering, using model output from the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) project. Results indicate terrestrial ecosystems become a stronger carbon sink globally because of lower ecosystem respiration and diminished disturbance effects under geoengineering. An additional 79 Pg C would be stored on land by the end of the twenty-first century, yielding as much as a 4% reduction in atmospheric CO _2 mole fraction without marine biogeochemical feedbacks, compared to the high greenhouse gas scenario without geoengineering.https://doi.org/10.1088/1748-9326/abacf7geoengineeringcarbon cycleterrestrial biogeochemical feedbacks |
| spellingShingle | Cheng-En Yang Forrest M Hoffman Daniel M Ricciuto Simone Tilmes Lili Xia Douglas G MacMartin Ben Kravitz Jadwiga H Richter Michael Mills Joshua S Fu Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate Environmental Research Letters geoengineering carbon cycle terrestrial biogeochemical feedbacks |
| title | Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| title_full | Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| title_fullStr | Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| title_full_unstemmed | Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| title_short | Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| title_sort | assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate |
| topic | geoengineering carbon cycle terrestrial biogeochemical feedbacks |
| url | https://doi.org/10.1088/1748-9326/abacf7 |
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