ADMAP Expert Group Report 2020 Popular

Antarctic Digital Magnetic Anomaly Project (ADMAP) 2018-2020 Report

Expert Group of the Geosciences Group

Report Author(s): Graeme Eagles (Germany), Fausto Ferraccioli (UK), Detlef Damaske (Germany)

Summary of activities from 2018-20

Meetings:

The ADMAP group met in a short side-meeting at the ISAES in Incheon. The goal of the meeting was to review the initial impact of the ADMAP2 publication and data release of 2018, and to agree a road-map towards further updates and versions as new magnetic anomaly data continue to be returned from Antarctica on a season-by-season basis:

1. The data release has been a success. The ADMAP2 data have been widely downloaded and used in a variety of new geophysical, geological and cryospheric studies. At the time of writing, the accompanying release paper (Golynsky et al., 2018; DOI:1029/2018GL078153) has been cited 22 times.
2. Complementary approaches to ADMAP2’s existing levelling procedures (see this preprint), and approaches to fast pre-levelling for achieving compatibility of new data sets to the ADMAP2 field (Timm Clausen MSc thesis, University of Bremen (in German)) were discussed. At the time of writing, over 500,000 line-kilometres of new magnetic data exist that are not incorporated into the ADMAP2 compilation.
3. A preliminary update to ADMAP2 showing new data that were not included in the 2018 release was briefly presented. Significantly, our colleagues from China committed in principle to sharing Chinese aeromagnetic data as part of ADMAP - just as soon as their national data portal goes online.

Fieldwork:

1. New helicopter-based magnetic acquisition by BGR (Germany) in Victoria Land in 2018/19.
2. New magnetic acquisition by AWI over the Falkland Plateau Basin in 2017/18 and 2018/19 for conjugate-margin based Antarctic studies.
3. New Chinese magnetic acquisition in Princess Elizabeth Land in 2017-20.
4. New magnetic acquisition by BAS in the Thwaites glacier region in 2018/19.
5. New Russian magnetic acquisition offshore Antarctica and in Queen Mary Land in 2017-20.
6. Continuation of international collaborative EAGLE acquisition in East Antarctica in 2017-20.

Publications:

There have been no new ADMAP compilations since the data release paper in 2018. Instead, members of ADMAP as well as external groups have published a range of papers that use and exploit the ADMAP2 compilation for a variety of geophysical, geodynamic, and glaciological studies.