Time-variable gravity fields and ocean mass change from 37 months of kinematic Swarm orbits

Lück, Christina; Kusche, Jürgen; Rietbroek, Roelof; Löcher, Anno

doi:https://doi.org/10.5194/se-9-323-2018

Articles | Volume 9, issue 2

https://doi.org/10.5194/se-9-323-2018

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

Special issue:

Dynamics and interaction of processes in the Earth and its...

https://doi.org/10.5194/se-9-323-2018

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

Articles | Volume 9, issue 2

Research article

|

23 Mar 2018

Research article |

| 23 Mar 2018

Time-variable gravity fields and ocean mass change from 37 months of kinematic Swarm orbits

Christina Lück, Jürgen Kusche, Roelof Rietbroek, and Anno Löcher

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Final revised paper (published on 23 Mar 2018)
Preprint (discussion started on 27 Nov 2017)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Reviewer comment', Anonymous Referee #1, 13 Dec 2017
- AC1: 'Review 1 - Answers', Christina Lück, 05 Feb 2018
RC2: 'review of "Time-variable gravity fields and ocean mass change from 37 months of kinematic Swarm orbits"', Anonymous Referee #2, 31 Dec 2017
- AC2: 'Review 2 - Answers', Christina Lück, 05 Feb 2018
RC3: 'Review', Anonymous Referee #3, 08 Jan 2018
- AC3: 'Review 3 - Answers', Christina Lück, 05 Feb 2018

Peer-review completion

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

AR by Christina Strohmenger on behalf of the Authors (06 Feb 2018) Author's response Manuscript

ED: Publish as is (06 Feb 2018) by Simon McClusky

ED: Publish as is (07 Feb 2018) by J. Huw Davies (Executive editor)

AR by Christina Strohmenger on behalf of the Authors (07 Feb 2018)

Short summary

Since 2002, the GRACE mission provides estimates of the Earth's time-variable gravity field, from which one can derive ocean mass variability. Now that the GRACE mission has come to an end, it is especially important to find alternative ways for deriving ocean mass changes. For the first time, we use kinematic orbits of Swarm for computing ocean mass time series. We compute monthly solutions, but also show an alternative way of directly estimating time-variable spherical harmonic coefficients.