First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening
Abstract Feedback control algorithms are important tools in climate intervention simulation design because they facilitate “top‐down” design, in which climate goals (often temperatures) are prescribed and a strategy chosen to meet the target. This approach is commonly used in simulations of stratosp...
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL113728 |
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| author | Walker Raymond Lee Chih‐Chieh Chen Jadwiga Richter Douglas G. MacMartin Ben Kravitz |
| author_facet | Walker Raymond Lee Chih‐Chieh Chen Jadwiga Richter Douglas G. MacMartin Ben Kravitz |
| author_sort | Walker Raymond Lee |
| collection | DOAJ |
| description | Abstract Feedback control algorithms are important tools in climate intervention simulation design because they facilitate “top‐down” design, in which climate goals (often temperatures) are prescribed and a strategy chosen to meet the target. This approach is commonly used in simulations of stratospheric aerosol injection (SAI) interventions, but have never been used with marine cloud brightening (MCB) interventions. Using data from previously published MCB simulations, we use the Community Earth System Model (CESM2) to simulate MCB deployments over regions which expand with time to limit global warming to 1.5°C in the SSP2‐4.5 scenario, and we design a feedback control algorithm to determine the scope of intervention each year. Our methodology is able to control global mean temperature in this way, but controlling global mean temperature does not by itself mitigate regional impacts common to tropical MCB; additionally, the algorithm takes longer than intended to converge, indicating room for future improvement. |
| format | Article |
| id | doaj-art-2bd111aecba042a58d93973cbfa45a3c |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-2bd111aecba042a58d93973cbfa45a3c2025-08-20T03:10:11ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01527n/an/a10.1029/2024GL113728First Simulations of Feedback Algorithm‐Regulated Marine Cloud BrighteningWalker Raymond Lee0Chih‐Chieh Chen1Jadwiga Richter2Douglas G. MacMartin3Ben Kravitz4Climate & Global Dynamics Division National Science Foundation's National Center for Atmospheric Research Bolder CO USAClimate & Global Dynamics Division National Science Foundation's National Center for Atmospheric Research Bolder CO USAClimate & Global Dynamics Division National Science Foundation's National Center for Atmospheric Research Bolder CO USASibley School of Mechanical and Aerospace Engineering Cornell University Ithaca NY USADepartment of Earth and Atmospheric Sciences Indiana University Bloomington IN USAAbstract Feedback control algorithms are important tools in climate intervention simulation design because they facilitate “top‐down” design, in which climate goals (often temperatures) are prescribed and a strategy chosen to meet the target. This approach is commonly used in simulations of stratospheric aerosol injection (SAI) interventions, but have never been used with marine cloud brightening (MCB) interventions. Using data from previously published MCB simulations, we use the Community Earth System Model (CESM2) to simulate MCB deployments over regions which expand with time to limit global warming to 1.5°C in the SSP2‐4.5 scenario, and we design a feedback control algorithm to determine the scope of intervention each year. Our methodology is able to control global mean temperature in this way, but controlling global mean temperature does not by itself mitigate regional impacts common to tropical MCB; additionally, the algorithm takes longer than intended to converge, indicating room for future improvement.https://doi.org/10.1029/2024GL113728climate interventionsolar geoengineeringmarine cloud brighteningfeedback control |
| spellingShingle | Walker Raymond Lee Chih‐Chieh Chen Jadwiga Richter Douglas G. MacMartin Ben Kravitz First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening Geophysical Research Letters climate intervention solar geoengineering marine cloud brightening feedback control |
| title | First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening |
| title_full | First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening |
| title_fullStr | First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening |
| title_full_unstemmed | First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening |
| title_short | First Simulations of Feedback Algorithm‐Regulated Marine Cloud Brightening |
| title_sort | first simulations of feedback algorithm regulated marine cloud brightening |
| topic | climate intervention solar geoengineering marine cloud brightening feedback control |
| url | https://doi.org/10.1029/2024GL113728 |
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