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\bibitem[{Murphy et~al.(2009)Murphy, Solomon, Portmann, Rosenlof, and
  F.P.M.}]{murphy}
Murphy, D., S.~Solomon, R.~Portmann, K.~Rosenlof, and F.P.M., 2009: An
  observationally based energy balance for the earth since 1950. \textit{J.
  Geophys. Res.}, \textbf{114}, D17\,107.

\end{thebibliography}