Stratospheric sulfate geoengineering could enhance the terrestrial photosynthesis rate

Stratospheric sulfate geoengineering could impact the terrestrial carbon cycle by enhancing the carbon sink. With an 8 Tg yr⁻¹ injection of SO₂ to produce a stratospheric aerosol cloud to balance anthropogenic radiative forcing from the Representative Concentration Pathway 6.0 (RCP6.0) scenario, we conducted climate model simulations with the Community Earth System Model – the Community Atmospheric Model 4 fully coupled to tropospheric and stratospheric chemistry (CAM4-chem). During the geoengineering period, as compared to RCP6.0, land-averaged downward visible (300-700 nm) diffuse radiation increased 3.2 W m⁻² (11 %). The enhanced diffuse radiation combined with the cooling increased plant photosynthesis by 0.07 ± 0.02 µmol C m⁻²

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Copyright 2016 Authors. This work is distributed under the Creative Commons Attribution 3.0 License.
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Author Xia, L.
Robock, A.
Tilmes, Simone
Neely, Ryan
Publisher UCAR/NCAR - Library
Publication Date 2016-02-10T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-11T20:51:12.431387
Metadata Record Identifier edu.ucar.opensky::articles:18282
Metadata Language eng; USA
Suggested Citation Xia, L., Robock, A., Tilmes, Simone, Neely, Ryan. (2016). Stratospheric sulfate geoengineering could enhance the terrestrial photosynthesis rate. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7xg9sqp. Accessed 31 July 2025.

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