Dear authors,

I am pleased to accept your manuscript for publication in Solid Earth, pending a couple of technical corrections as follows:

1. Abstract: It is great to see that the 3D structural and density model will be made available for open access use (lines 22/23 in the abstract). In the final version of the manuscript, could you please post the link to the data repository where the model can be accessed (under data availability).

2. Discussion: This section is over 3 pages printed length and i recommend dividing in sub-sections for increased readability.

3. Acknowledgements: Reviewer 2 was not anonymous and i suggest including their name where the reviewers are thanked.

4. Figure 1a: The labels 'urg','mb' and 'po' are not visible on the printed version of the figure.

Thank you in advance for making these changes.

With best wishes,
Susanne Buiter

Dear authors,

I am pleased to accept your manuscript for publication in Solid Earth, pending the technical corrections listed in the Topical Editor section. Thank you for submitting your work to Solid Earth!

With best wishes,
Susanne Buiter