Erratum to 'Vortex dynamics of stratospheric sudden warmings: A reanalysis data study using PV contour integral diagnostics'

This is the final version. Available from Wiley via the DOI in this record. There is a sign error in equation (24), and subsequently in equations (27) and (28), in the paper by Kwasniok et al. (). These equations correctly read: (Formula presented.) (Formula presented.) (Formula presented.) Figure 8 is affected by this error. However, we remark that, as argued by Haynes and McIntyre (), the diabatic PV flux (Formula presented.) along isentropic surfaces is usually very small in comparison to the flux JF associated with typical gravity wave drag forces F. Hence the authors still believe that the two prominent events of removal of circulation from the vortex due to frictional processes visible in Figure 8 between mid-January and mid-February 1979 in the run-up to the SSW are genuine. Also the general comments in the paper on the circulation balance and its use to diagnose frictional processes remain valid. All of the other results, equations, figures, comments and conclusions of the paper are not affected by this error and remain valid. The authors would like to apologise for any inconvenience caused. ACKNOWLEDGEMENT The authors would like to thank Zachary Lawrence for pointing out this error