1 Erratum to: Clim Dyn DOI 10.1007/s00382-014-2166-9

In the original publication of the article, there were errors in the Mathematical Expression for “C” on Page 9. The greek prefix “theta” was missing in the expression.

The correct Mathematical expression should read as given below:

$$ C = \frac{{f^{2} \left( {u_{200} - u_{700} } \right)\theta_{500} }}{{\beta gH\left( {\theta_{200} - \theta_{700} } \right)}} $$