Articles | Volume 18, issue 9
Research article
14 May 2018
Research article |  | 14 May 2018

A new index for the wintertime southern hemispheric split jet

Stella Babian, Jens Grieger, and Ulrich Cubasch


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Anna Wenzel on behalf of the Authors (26 Jan 2018)  Author's response
ED: Referee Nomination & Report Request started (04 Feb 2018) by Peter Haynes
RR by Anonymous Referee #2 (08 Feb 2018)
RR by Anonymous Referee #1 (19 Feb 2018)
ED: Publish subject to technical corrections (14 Mar 2018) by Peter Haynes
Short summary
One of the most prominent asymmetric features of the southern hemispheric (SH) circulation is the split jet over Australia and New Zealand in austral winter. We propose a new, hemispherical index that is based on the principal components (PCs) of the zonal wind field for the SH winter. The new PC-based index (PSI) suggests that the SH split jet is strongly associated with the AAO. Furthermore, both flavors of ENSO and the PSA-1 pattern produce favorable conditions for a SH split event.
Final-revised paper