https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018EF001094
Impacts of sulfate geoengineering on rice yield in China: results from a multi‐model ensemble Pei Zhan Wenquan Zhu Tianyi Zhang Xuefeng Cui Nan Li First published: 22 March 2019 https://doi.org/10.1029/2018EF001094 Abstract Sulfate geoengineering could mitigate global warming via injecting SO2 into the stratosphere. However, its impacts on regional climate might lead to adverse consequences for local agriculture. In this study, we simulated the impacts of sulfate geoengineering on rice yield in China both with sufficient irrigation (irrigated) and without irrigation (rainfed). We used Geoengineering Model Intercomparison Project (GeoMIP) G4 climates from 6 climate models to force the ORYZA version 3 crop model to simulate rice yields under sulfate geoengineering scenario. G4 prescribes a sulfate injection to offset the radiative forcing in the Representative Concentration Pathway (RCP) 4.5 scenario. Results indicated that during the last 15 years of G4 sulfate geoengineering (i.e., 2055–2069), the implementation of sulfate geoengineering increases rice yields in most areas in China comparing with that without the implementation of sulfate geoengineering (i.e., RCP4.5), with a yield increase of 5.3 ± 5.7 % for irrigated yield and 4.8 ± 7.3 % for rainfed yield. After the termination of sulfate geoengineering, the irrigated rice yield in G4 is still significantly higher than that in RCP4.5, but such increase is not significant for rainfed yield. Temperature is always the dominant factor that drives the rice yield change no matter under irrigated or rainfed conditions, but the effect from solar radiation cannot be ignored in southern China. Key Points G4 sulfate geoengineering is projected to increase irrigated rice yield in China by 5.3 ± 5.7 % G4 sulfate geoengineering is projected to increase rainfed rice yield in China by 4.8 ± 7.3 % Temperature is the dominant factor driving the rice yield changes -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
