Earth System Dynamics
Earth System Dynamics
ESD
Articles | Volume 7, issue 3
Articles | Volume 7, issue 3
https://doi.org/10.5194/esd-7-597-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esd-7-597-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 7, issue 3
Peer-reviewed comment
 | 
13 Jul 2016
Peer-reviewed comment |  | 13 Jul 2016

Comment on "Scaling regimes and linear/nonlinear responses of last millennium climate to volcanic and solar forcing" by S. Lovejoy and C. Varotsos (2016)

Kristoffer Rypdal and Martin Rypdal

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This comment on the paper by Lovejoy and Varotsos demonstrates that their methods for establishing nonlinearity in the global temperature response in climate models are flawed. One of their methods is based on an invalid approximation, which when corrected does not falsify the hypothesis that the response is linear. This conclusion is enforced when internal variability in the models are accounted for. The other results in their paper are also shown to be reproduced by linear-response models.
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