\begin{thebibliography}{12}
\providecommand{\natexlab}[1]{#1}
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  \providecommand{\doi}[1]{doi:\discretionary{}{}{}#1}\else
  \providecommand{\doi}{doi:\discretionary{}{}{}\begingroup
  \urlstyle{rm}\Url}\fi
\providecommand{\eprint}[2][]{\url{#2}}

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\bibitem[{Donohoe and Battisti(2012)}]{donohoe_battisti_seas}
Donohoe, A. and D.~Battisti, 2012: The seasonal cycle of atmospheric heating
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\bibitem[{Fasullo and Trenberth(2008{\natexlab{a}})}]{fasullo_tren_a}
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\bibitem[{Fasullo and Trenberth(2008{\natexlab{b}})}]{fasullo_tren_b}
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\bibitem[{Rose and Ferreira(2013)}]{rose_oht}
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\bibitem[{Trenberth and Smith(2008)}]{tren_08}
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\end{thebibliography}