On-line and off-line data assimilation in palaeoclimatology: a case study

Matsikaris, A.; Widmann, M.; Jungclaus, J.

doi:https://doi.org/10.5194/cp-11-81-2015

Articles | Volume 11, issue 1

https://doi.org/10.5194/cp-11-81-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/cp-11-81-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 11, issue 1

Research article

|

15 Jan 2015

Research article |

| 15 Jan 2015

On-line and off-line data assimilation in palaeoclimatology: a case study

A. Matsikaris, M. Widmann, and J. Jungclaus

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Final revised paper (published on 15 Jan 2015)
Preprint (discussion started on 22 Aug 2014)

Interactive discussion

Status: closed

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

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RC C1419: 'An interesting short study', Anonymous Referee #1, 02 Sep 2014
RC C1496: 'Comparison of on-line and off-line DA methods is tricky', Anonymous Referee #2, 18 Sep 2014
AC C1825: 'Authors' response', Anastasios Matsikaris, 03 Nov 2014

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Anastasios Matsikaris on behalf of the Authors (03 Nov 2014) Author's response Manuscript

ED: Referee Nomination & Report Request started (12 Nov 2014) by Volker Rath

RR by Anonymous Referee #1 (15 Nov 2014)

RR by Anonymous Referee #2 (10 Dec 2014)

ED: Publish subject to technical corrections (10 Dec 2014) by Volker Rath

AR by Anastasios Matsikaris on behalf of the Authors (11 Dec 2014) Author's response Manuscript

Short summary

We compare an off-line and an on-line ensemble-based data assimilation method, for the climate of the 17th century. Both schemes perform better than the simulations without DA, and similar skill on the continental and hemispheric scales is found. This indicates either a lack of control of the slow components in our setup or a lack of skill in the information propagation on decadal timescales. The temporal consistency of the analysis in the on-line method makes it generally more preferable.