TACtical Workshop
21-23 March 2018
CSIRO Auditorium – Hobart
Castray Esplanade, Battery Point,
Hobart, Tasmania, Australia 7004

Current efforts, collaborations and future directions in Antarctic geothermal heat flux research.

The geothermal heat flux to the base of the Antarctic ice sheet is inherently difficult to measure, yet accurate estimates are necessary to better understand cryosphere dynamics. This is crucial to improve models of ice discharge and sea level change, and optimise site selection for ice core paleoclimate studies. This workshop will include presentations and discussion around a new generation of Antarctic geothermal heat flux measurements, derivations and models. We invite interested researchers from the solid Earth, cryosphere and ice sheet modelling communities to join us in Hobart in March 2018.


The workshop will bring together a diverse community of researchers with a common interest in the geothermal heat flux of Antarctica. In addition to sharing research results and current directions, the conveners propose that participants work together to agree a program of actions towards two major outcomes to support the future research of the community: 1) Geothermal Heat Flux Observations Database and 2) Geothermal Heat Flux Model Sets. The database is envisioned as a dynamic repository that includes plans for future seasons. The model sets could include alternatives based on different approaches and also probabilistic information. We will provide a report on the workshop for the community and sponsors.

Wednesday 21 March

0900 Registration + Coffee @ CSIRO Auditorium
0930 Welcome
Theme 1 
Convenors: Frank Pattyn & Felicity Graham
0940 Theme 1 KeynoteHelene Seroussi
Ice flow modeling and geothermal heat flux
1020 Theme 1 Talks
1040 Morning Tea & Posters
 1120 Theme 1 Talks
  • Winnie Chu
    Partitioning the geothermal component of basal melting beneath ice-sheets: lessons from Greenland
  • Frank Pattyn 
    Promising Oldest Ice sites in East Antarctica based on thermodynamical modelling

ALL themes Lightning talks

1230 Lunch & Posters
Theme 2
Convenors Jason Roberts, Karstsen Gohl, Slawek Tulaczyk
1320 Theme 2 Keynote Dustin Schroeder
Observationally Constraining Geothermal Heat Flux Using Ice Penetrating Radar
1400 Theme 2 Talks
  • Carolyn Branecky Begeman
    Spatial variability in geothermal heat flux in Antarctica: new measurements and ice dynamical implications
  • Pavel Talalay
    Temperature gradients and geothermal fluxes in deep boreholes drilled through the Antarctic Ice Sheet: A review
1440 Afternoon Tea & Posters
1520 Theme 2 Talks
  • Lucas Beem
    Evaluating the difference between geothermal flux and basal heat flux in the context of ice divide stability, Little Dome C, East Antarctica
  • Ricarda Dziadek
    GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica
  • Genti Toyokuni
    Changes in Greenland ice bed conditions inferred from seismology
1620 Discussion Session (30min)
Plans and priorities for measuring and modelling (Themes 1+2)
1700 IMAS building tour (optional)
1730 Welcome Drinks & Canapes
@ the Institute for Marine and Antarctic Studies (IMAS),
Castray Esplanade
1900 Free Evening

Thursday 22 March

Theme 3
Convenors: Wiesen Shen, Jacqueline Halpin, Derrick Hasterok
0900 Theme 3 KeynoteDoug Weins
Constraints on the geothermal heat flow of Antarctica and surrounding oceans from new seismic structure models
0940 Theme 3 Talks
  • Weisen Shen
    Thermal structure and heat flow of central and West Antarctica estimated from seismic data
  • Duncan Young
    Reconciling geological and radioglaciological context for heat flow in West Antarctica
  • Phil Wannamaker
    Elevated sub-ice thermal flux mapping using magnetotellurics
1040 Morning Tea & Posters
1120 Theme 3 Keynote 2 – Yasmina Martos
Revealing the geothermal heat flux of the Antarctic continent
1200 Theme 3 Talks
  • Ricarda Dziadek
    Linking GHF to crustal structures and DBMS Estimates in the Amundsen Sea Sector
  • Audrey Huerta
    Constraints on Heat Flow in Antarctica based on Thermomechanical Models of the Tectonic Evolution
1240 Lunch & Posters
1330 Theme 3 Talks
  • Alicia Pollett
    Constraining basal heat flux in eastern Antarctica using new heat flow data from the Coompana Province, Nullarbor Plain, southern Australia
Theme 4
Convenors: Anya Reading & Duncan Young
Theme 4 Talks
  • Tobias Staal
    Towards a multi-domain lithospheric model of East Antarctica
  • Fausto Ferraccioli
    Devil in the detail: enhanced imaging of Antarctic crustal and lithospheric provinces to aid future geothermal heat flux estimation
1430 Afternoon Tea & Posters
1510 Discussion Session (30min)
Plans and priorities for data collection (Themes 3+4)
1540 Free Time
1715 – 2300 Workshop Dinner
@ Peppermint Bay Hotel, Woodbridge,
Ferry dept Brooke St Pier 5.30pm (board 5.15pm), returns Brooke St Pier 11.00pm

Friday 23 March

0900 Theme 4 KeynoteDerrick Hasterok
Thermal isostatic contributions to elevation: implications for the thermal state of Antarctica
0940 Theme 4 Talks
  • Anya Reading
    Combining interpolated and locally observed contributions to heat flow models
  • Ben Mather
    Uncertainty reduction of geothermal heat flux from assimilating seismic tomography and depth to Curie temperature
1020 Discussion Session (20min)
Emerging technologies
1040 Morning Tea & Posters
1120 Workshop Session 1 (1hr 10min)
Community Goals/Databases and Models
What do we need?
1230 Lunch & Posters
1330 Workshop Session 2 (1hr 10min)
Making it happen/Actions and Links
How do we progress?
1440 Close
From 1600 R/V Investigator tour (optional)
Details TBC

PDF of ALL Abstracts

TACtical Abstract Book

Poster Presentations

Theme 1

  • Steven Phipps
    The importance of geothermal heat flux in modelling of the Antarctic Ice Sheet
  • Adam Treverrow
    The high temperature creep deformation of ice: new laboratory measurements

Theme 2

  • Syed Abdul Salam
    Inferring geothermal heat flux from englacial temperatures in East Antarctica

Theme 3

  • Matthew Gard 
    Improved models of Antarctic geothermal temperatures and crustal heat flux: constraints from geochemistry and Curie depth analysis
  • Jacqueline Halpin 
    Warm, warmer, hot! Antarctic crustal radiogenic heat production.
  • Alex Burton-Johnson/Jacqueline Halpin
    A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production
  • Derrick Hasterok
    Heat production estimates from a global geochemical dataset: A priori constraints on Antarctic heat production
  • Alessandro Maritati 
    New geological insights fingerprint high heat producing crust in the remote interior of Wilkes Land, East Antarctica
  • Sandra McLaren
    Heat production and heat flow variations in Australian continental terranes, lessons for geological based estimates of sub-glacial heat flow in Antarctica
  • Bernd Kulessa/Sarah Thompson 
    Heat and groundwater transport between the Antarctic Ice Sheet and subglacial sedimentary basins from electromagnetic geophysical measurements

Theme 4              



Conveners: Frank Pattyn, Felicity Graham

Geothermal heat flux is an important control on ice sheet dynamics, modifying basal temperatures at the ice-solid Earth interface. If geothermal heat flux is sufficiently high, basal meltwater is generated, which is a strong predictor of basal sliding. Numerical ice sheet models rely on geothermal heat flux as a key thermal boundary condition, uncertainties in which propagate through transient ice sheet model simulations. This session focusses on the impact of geothermal heat flux on ice sheet dynamic processes simulated by numerical models at a range of scales, and will also examine numerical model capabilities to constrain current estimates of geothermal heat flux.

Keynote Theme 1: Helen Seroussi (NASA Jet Propulsion Lab)

Conveners: Karsten Gohl, Slawek Tulaczyk, Jason Roberts

Direct observation of the geothermal heat flux is extremely difficult for most of Antarctica. However, some measurements have recently been made into sediments under the ice sheet and at the ice edge on the continental shelf. Indirect measurements through the cryosphere are also possible, and in order to assess the direct effect on ice sheet basal dynamics, estimates of geothermal heat flux from local basal properties are required. Such geothermal sensitive properties include borehole temperature distribution and englacial radar and seismic reflector strength, while the presence melt zones at the base of the ice sheet provide a lower bound on the geothermal heat flux. This session will include measurements of geothermal heat flux under the ice sheet and at ice-proximal settings along the inner continental shelf, and explore methods to derive geothermal heat flux based on properties of the ice sheet.

Keynote Theme 2: Dustin Schroeder (Stanford University)

Conveners: Weisen Shen, Jacqueline Halpin, Derrick Hasterok

Geophysical and geological approaches to constraining the magnitude and spatial variability of geothermal heat flux across the Antarctic continent include satellite, airborne and ground-based methods such as magnetic, seismic and geochemical techniques. Combining these constraints at appropriate scales to more accurately characterise and couple the deep (mantle) and shallow (crustal) contributions to geothermal heat flux is now a major challenge. This session invites contributions from researchers interested in novel approaches to quantifying geothermal heat flux in Antarctica (and elsewhere) from a solid Earth/plate tectonic perspective.

Keynotes Theme 3: Doug Wiens (Washington University in St Louis) and Yasmina Martos (NASA Goddard Space Flight Center/University of Maryland)

Convener: Anya Reading and Duncan Young

Antarctic geothermal heat flux research is rapidly evolving due to new technologies and capabilities. This session provides an opportunity to look forward to likely achievements in coming field seasons using the new equipment and platforms. Challenges in data integration to advance knowledge in geothermal heat flux research will also be discussed including the use of observations to validate models, interpolating geothermal heat flux, integrating models across local to continental scales and model uncertainty.  This session also encourages discussion of research priorities for the near future.

Keynote Theme 4: Derrick Hasterok (University of Adelaide).


For questions about the conference program please contact Jacqueline Halpin.



For registration enquiries, please contact the team at Conference Design.




BEFORE 21 JAN 2018
AUD$ 250
Includes the workshop sessions and dinner.


FROM 22 JAN 2018
AUD$ 300
Includes the workshop sessions and dinner.



Abstract submission has closed. Contact Jacqueline Halpin regarding late submissions.


During the abstract submission process you will be asked to submit:

  • A presentation title
  • Authors
  • Affiliations for the authors
  • A 300 word abstract
  • A contact email for the presenters or main author
  • A preferred presentation format
  • Indicate if you are applying for a travel bursary

Authors will be notified of the status of their abstracts and the presentation format by the 18th of December.


Oral Presentation

It is anticipated oral presentations will be allocated 15 minutes for presentation, including 3 minutes for question time.

Display Posters

An A0 portrait size poster (841 mm wide x 1189 mm high) that will be displayed for the duration of the Conference.


All presenters will be required to register for the conference and pay the appropriate registration fee. Presenters also need to meet their own travel and accommodation costs.


The program committee will review all submitted abstracts. As there are limited places for talks, some abstracts submitted for talks may be offered posters. Authors in these cases will be advised and asked to confirm whether they wish to present a poster.


The session room will be equipped for the presentation of PDF or PowerPoint slides and will include:

  • a data projector
  • computer with external speakers
  • lectern
  • microphone at the lectern


Please provide slides in PDF or PowerPoint format with embedded audiovisuals. Presentations will be loaded onto the system prior to the first session of each day. It is preferable that all slides run from the presentation computer. However, if you have a complex presentation, which includes multiple media files, we suggest you bring your own laptop as a backup in case of difficulties loading your presentation.

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