http://onlinelibrary.wiley.com/doi/10.1002/2017GL076546/full
Simulated effect of carbon cycle feedback on climate response to solar
geoengineering
Authors
- Long Cao,
- <long...@zju.edu.cn>
- <http://orcid.org/0000-0002-8336-4242>
1.
-
<long...@zju.edu.cn>
<http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Long%20Cao%22>
- Jiu Jiang
- <http://orcid.org/0000-0003-0115-4469>
1.
<http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Jiu%20Jiang%22>
- Accepted manuscript online:14 December 2017Full publication history
<http://onlinelibrary.wiley.com/doi/10.1002/2017GL076546/full#publication-history>
- DOI:10.1002/2017GL076546 View/save citation
<http://onlinelibrary.wiley.com/enhanced/exportCitation/doi/10.1002/2017GL076546>
Abstract
Most modeling studies investigate climate effects of solar geoengineering
under prescribed atmospheric CO2, thereby neglecting potential climate
feedbacks from the carbon cycle. Here we use an Earth system model to
investigate interactive feedbacks between solar geoengineering, global
carbon cycle, and climate change. We design idealized sunshade
geoengineering simulations to prevent global warming from exceeding 2°C
above pre-industrial under a CO2 emission scenario with emission mitigation
starting from mid-of-century. By year 2100, solar geoengineering reduces
the burden of atmospheric CO2 by 47 PgC with enhanced carbon storage in the
terrestrial biosphere. As a result of reduced atmospheric CO2,
consideration of the carbon cycle feedback reduces required insolation
reduction in 2100 from 2.0 to 1.7 W m-2. With a higher climate sensitivity
the effect from carbon cycle feedback becomes more important. Our study
demonstrates the importance of carbon cycle feedback in climate response to
solar geoengineering
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