\begin{thebibliography}{7}
\providecommand{\natexlab}[1]{#1}
\providecommand{\url}[1]{{#1}}
\providecommand{\urlprefix}{URL }
\expandafter\ifx\csname urlstyle\endcsname\relax
  \providecommand{\doi}[1]{DOI~\discretionary{}{}{}#1}\else
  \providecommand{\doi}{DOI~\discretionary{}{}{}\begingroup
  \urlstyle{rm}\Url}\fi
\providecommand{\eprint}[2][]{\url{#2}}

\bibitem[{Donohoe and Battisti(2011)}]{donohoe_atmospheric_2011}
Donohoe A, Battisti DS (2011) Atmospheric and suface contributions to planetary
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\bibitem[{Forster and Taylor(2006)}]{forster_climate_2006}
Forster P, Taylor K (2006) Climate forcings and climate sensitivities diagnosed
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\bibitem[{Gonzalez and Woods(2002)}]{gonzalez_digital_2002}
Gonzalez RC, Woods RE (2002) Digital Image Processing, 2nd edn. Prentice Hall,
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\bibitem[{Hansen et~al(2005)Hansen, Nazarenko, Ruedy, Sato, Willis, Del~Genio,
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Hansen J, Nazarenko L, Ruedy R, Sato M, Willis J, Del~Genio A, Koch D, Lacis A,
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t/308/5727/1431}

\bibitem[{Levitus et~al(2001)Levitus, Antonov, Wang, Delworth, Dixon, and
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Levitus S, Antonov J, Wang J, Delworth T, Dixon K, Broccoli A (2001)
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\bibitem[{Meehl et~al(2007)Meehl, Covey, Taylor, Delworth, Stouffer, Latif,
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Meehl GA, Covey C, Taylor KE, Delworth T, Stouffer RJ, Latif M, {McAvaney} B,
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\bibitem[{Trenberth and Fasullo(2009)}]{trenberth_global_2009}
Trenberth KE, Fasullo JT (2009) Global warming due to increasing absorbed solar
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\end{thebibliography}
