Mitigating climate disruption in time: A self-consistent approach for avoiding both near-term and long-term global warming

@article{Dreyfus2022MitigatingCD,
  title={Mitigating climate disruption in time: A self-consistent approach for avoiding both near-term and long-term global warming},
  author={Gabrielle B Dreyfus and Yangyang Xu and Drew T. Shindell and Durwood Zaelke and Veerabhadran Ramanathan},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2022},
  volume={119}
}
  • G. Dreyfus, Yangyang Xu, V. Ramanathan
  • Published 23 May 2022
  • Environmental Science
  • Proceedings of the National Academy of Sciences of the United States of America
Significance This study clarifies the need for comprehensive CO2 and non-CO2 mitigation approaches to address both near-term and long-term warming. Non-CO2 greenhouse gases (GHGs) are responsible for nearly half of all climate forcing from GHG. However, the importance of non-CO2 pollutants, in particular short-lived climate pollutants, in climate mitigation has been underrepresented. When historical emissions are partitioned into fossil fuel (FF)- and non-FF-related sources, we find that nearly… 

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References

SHOWING 1-10 OF 38 REFERENCES

Climate and carbon budget implications of linked future changes in CO2 and non-CO2 forcing

The approximate proportional relationship between cumulative carbon emissions and instantaneous global temperature rise (the carbon budget approximation) has proven to be a useful concept to

Stringent mitigation substantially reduces risk of unprecedented near-term warming rates

Following the Paris Agreement, many countries are enacting targets to achieve net-zero GHG emissions. Stringent mitigation will have clear societal benefits in the second half of this century by

Parallel Pursuit of Near-Term and Long-Term Climate Mitigation

Two separate treaties are needed to address the unique climate roles of long-lived versus medium- and short-lived pollutants. It is well accepted that reduction of carbon dioxide (CO2) emissions is

Reducing abrupt climate change risk using the Montreal Protocol and other regulatory actions to complement cuts in CO2 emissions

TLDR
“Fast-action” mitigation strategies can reduce emissions of black carbon particles and precursor gases that lead to ozone formation in the lower atmosphere, and increase biosequestration, including through biochar, which may reduce the risk of abrupt climate change in the next few decades by complementing cuts in CO2 emissions.

Delayed emergence of a global temperature response after emission mitigation

TLDR
There is a substantial delay between reductions of emissions and a detectable change in surface temperature for a number of climate forcers, including Anthropogenic CO 2 and Black Carbon mitigation.

Disentangling the effects of CO2 and short-lived climate forcer mitigation

TLDR
It is shown that the short- and long-term climate effects of many SLCF measures consistently become smaller in scenarios that keep warming to below 2 °C relative to preindustrial levels, reinforcing that SLCf measures are to be considered complementary rather than a substitute for early and stringent CO2 mitigation.

The role of HFCs in mitigating 21st century climate change

Abstract. There is growing international interest in mitigating climate change during the early part of this century by reducing emissions of short-lived climate pollutants (SLCPs), in addition to

Climate and air-quality benefits of a realistic phase-out of fossil fuels

TLDR
It is shown that more realistic modelling scenarios do not produce a substantial near-term increase in either the magnitude or the rate of warming, and in fact can lead to a decrease in warming rates within two decades of the start of the fossil-fuel phase-out.

Cumulative carbon as a policy framework for achieving climate stabilization

TLDR
It is suggested that non-CO2 emissions contribute to uncertainty in the cumulative carbon budget associated with near-term temperature targets, and may suggest the need for a mitigation approach that considers separately short- and long-lived gas emissions.

Well below 2 °C: Mitigation strategies for avoiding dangerous to catastrophic climate changes

TLDR
This work outlines a three-lever strategy to limit the central warming below the dangerous level and the LPHI below the catastrophic level, both in the near term (<2050) and in the long term (2100): the carbon neutral lever to achieve zero net emissions of CO2, the super pollutant lever to mitigate short-lived climate pollutants, and the carbon extraction and sequestration lever to thin the atmospheric CO2 blanket.