A new index for the wintertime southern hemispheric split jet

Babian, Stella; Grieger, Jens; Cubasch, Ulrich

doi:https://doi.org/10.5194/acp-18-6749-2018

Articles | Volume 18, issue 9

https://doi.org/10.5194/acp-18-6749-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-6749-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

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Final revised paper (published on 14 May 2018)
Preprint (discussion started on 16 Oct 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Referee comment on “A New Index For The Wintertime Southern Hemispheric Split Jet” by Babian et al.', Anonymous Referee #1, 14 Nov 2017
RC2: 'Review of "A New Index For The Wintertime Southern Hemispheric Split Jet"', Anonymous Referee #2, 12 Dec 2017
- AC2: 'Response to Referee #2 - A New Index For The Wintertime Southern Hemispheric Split Jet', Stella Babian, 23 Jan 2018
AC1: 'Response to Referee #1 - A New Index For The Wintertime Southern Hemispheric Split Jet', Stella Babian, 23 Jan 2018

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.