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Simulated long‐term climate response to idealized solar geoengineering

Long Cao,Lei Duan,G. Bala,K. Caldeira

Published 2016 in Geophysical Research Letters

ABSTRACT

Solar geoengineering has been proposed as a potential means to counteract anthropogenic climate change, yet it is unknown how such climate intervention might affect the Earth's climate on the millennial time scale. Here we use the HadCM3L model to conduct a 1000 year sunshade geoengineering simulation in which solar irradiance is uniformly reduced by 4% to approximately offset global mean warming from an abrupt quadrupling of atmospheric CO2. During the 1000 year period, modeled global climate, including temperature, hydrological cycle, and ocean circulation of the high‐CO2 simulation departs substantially from that of the control preindustrial simulation, whereas the climate of the geoengineering simulation remains much closer to that of the preindustrial state with little drift. The results of our study do not support the hypothesis that nonlinearities in the climate system would cause substantial drift in the climate system if solar geoengineering was to be deployed on the timescale of a millennium.

PUBLICATION RECORD

  • Publication year

    2016

  • Venue

    Geophysical Research Letters

  • Publication date

    2016-03-16

  • Fields of study

    Geology, Physics, Environmental Science

  • Identifiers
    DOI 10.1002/2016GL068079
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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