Earth System Dynamics
Earth System Dynamics
ESD
Articles | Volume 8, issue 1
Articles | Volume 8, issue 1
https://doi.org/10.5194/esd-8-177-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esd-8-177-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 8, issue 1
Research article
 | 
16 Mar 2017
Research article |  | 16 Mar 2017

Reconciling the signal and noise of atmospheric warming on decadal timescales

Roger N. Jones and James H. Ricketts

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Short summary
Climate over decadal timescales, forced by added greenhouse gases, could either change independently of internally generated variability or interact with it. For hypothesis 1, the atmosphere warms gradually, affected by random climate noise. For hypothesis 2, warming is nonlinear and step-like. Two statistical models, step and trend, are used to analyse observed and modelled temperatures; the results are subject to six tests. In conclusion, externally forced warming is step-like at these scales.
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