Articles | Volume 7, issue 1
https://doi.org/10.5194/esd-7-133-2016
https://doi.org/10.5194/esd-7-133-2016
Research article
 | 
23 Feb 2016
Research article |  | 23 Feb 2016

Scaling regimes and linear/nonlinear responses of last millennium climate to volcanic and solar forcings

Shaun Lovejoy and Costas Varotsos

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Shaun Lovejoy on behalf of the Authors (12 Jan 2016)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (13 Jan 2016) by Christian Franzke
RR by Kristoffer Rypdal (21 Jan 2016)
RR by Anonymous Referee #2 (24 Jan 2016)
ED: Publish subject to minor revisions (review by Editor) (24 Jan 2016) by Christian Franzke
AR by Shaun Lovejoy on behalf of the Authors (01 Feb 2016)  Author's response   Manuscript 
ED: Publish as is (04 Feb 2016) by Christian Franzke
AR by Shaun Lovejoy on behalf of the Authors (06 Feb 2016)  Manuscript 
Short summary
We compare the statistical properties of solar, volcanic and combined forcings over the range from 1 to 1000 years to see over which scale ranges they additively combine, a prediction of linear response. The main findings are (a) that the variability in the Zebiac–Cane model and GCMs are too weak at centennial and longer scales; (b) for longer than ≈ 50 years, the forcings combine subadditively; and (c) at shorter scales, strong (intermittency, e.g. volcanic) forcings are nonlinear.
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