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Dziadek, Ricarda; Gohl, Karsten; Diehl, Alexander; Kaul, Norbert (2017): Marine in-situ heat flow data from West Antarctica during POLARSTERN cruise ANT-XXIV/3 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.877683, Supplement to: Dziadek, R et al. (2017): Geothermal heat flux in the Amundsen Sea sector of West Antarctica: New insights from temperature measurements, depth to the bottom of the magnetic source estimation, and thermal modeling. Geochemistry, Geophysics, Geosystems, 18, 2657–2672, https://doi.org/10.1002/2016GC006755

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Abstract:
Focused research on the Pine Island and Thwaites glaciers, which drain the West Antarctic Ice Shelf (WAIS) into the Amundsen Sea Embayment (ASE), revealed strong signs of instability in recent decades that result from variety of reasons, such as inflow of warmer ocean currents and reverse bedrock topography and has been established as the Marine Ice Sheet Instability hypothesis. Geothermal heat flux (GHF) is a poorly constrained parameter in Antarctica and suspected to affect basal conditions of ice sheets, i.e. basal melting and subglacial hydrology. Thermomechanical models demonstrate the influential boundary condition of geothermal heat flux for (paleo) ice sheet stability. Due to a complex tectonic and magmatic history of West Antarctica, the region is suspected to exhibit strong heterogeneous geothermal heat flux variations. We present an approach to investigate ranges of realistic heat fluxes in the ASE by different methods, discuss direct observations, and 3D numerical models that incorporate boundary conditions derived from various geophysical studies, including our new Depth to the Bottom of the Magnetic Source (DBMS) estimates. Our in-situ temperature measurements at 26 sites in the ASE more than triples the number of direct GHF observations in West Antarctica. We demonstrate by our numerical 3D models that GHF spatially varies from 68 mW/m² up to 110 mW/m².
Coverage:
Median Latitude: -73.609561 * Median Longitude: -110.437920 * South-bound Latitude: -74.833170 * West-bound Longitude: -135.052700 * North-bound Latitude: -70.364300 * East-bound Longitude: -102.366670
Date/Time Start: 2010-02-18T23:30:00 * Date/Time End: 2010-03-27T03:35:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
30 datasets

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Datasets listed in this publication series

  1. Kaul, N (2017): Heat flow data at station PS75/129-2. https://doi.org/10.1594/PANGAEA.877653
  2. Kaul, N (2017): Heat flow data at station PS75/129-2 (V9420). https://doi.org/10.1594/PANGAEA.877654
  3. Kaul, N (2017): Heat flow data at station PS75/132-2. https://doi.org/10.1594/PANGAEA.877655
  4. Kaul, N (2017): Heat flow data at station PS75/136-4. https://doi.org/10.1594/PANGAEA.877656
  5. Kaul, N (2017): Heat flow data at station PS75/139-3. https://doi.org/10.1594/PANGAEA.877657
  6. Kaul, N (2017): Heat flow data at station PS75/162-2. https://doi.org/10.1594/PANGAEA.877658
  7. Kaul, N (2017): Heat flow data at station PS75/163-2. https://doi.org/10.1594/PANGAEA.877659
  8. Kaul, N (2017): Heat flow data at station PS75/164-2. https://doi.org/10.1594/PANGAEA.877660
  9. Kaul, N (2017): Heat flow data at station PS75/165-2. https://doi.org/10.1594/PANGAEA.877661
  10. Kaul, N (2017): Heat flow data at station PS75/166-2. https://doi.org/10.1594/PANGAEA.877662
  11. Kaul, N (2017): Heat flow data at station PS75/169-2. https://doi.org/10.1594/PANGAEA.877663
  12. Kaul, N (2017): Heat flow data at station PS75/170-2. https://doi.org/10.1594/PANGAEA.877664
  13. Kaul, N (2017): Heat flow data at station PS75/173-2. https://doi.org/10.1594/PANGAEA.877665
  14. Kaul, N (2017): Heat flow data at station PS75/174-2. https://doi.org/10.1594/PANGAEA.877666
  15. Kaul, N (2017): Heat flow data at station PS75/178-2. https://doi.org/10.1594/PANGAEA.877667
  16. Kaul, N (2017): Heat flow data at station PS75/179-2. https://doi.org/10.1594/PANGAEA.877668
  17. Kaul, N (2017): Heat flow data at station PS75/180-4. https://doi.org/10.1594/PANGAEA.877669
  18. Kaul, N (2017): Heat flow data at station PS75/181-1. https://doi.org/10.1594/PANGAEA.877670
  19. Kaul, N (2017): Heat flow data at station PS75/182-1. https://doi.org/10.1594/PANGAEA.877671
  20. Kaul, N (2017): Heat flow data at station PS75/184-2. https://doi.org/10.1594/PANGAEA.877672
  21. Kaul, N (2017): Heat flow data at station PS75/185-1. https://doi.org/10.1594/PANGAEA.877673
  22. Kaul, N (2017): Heat flow data at station PS75/190-2. https://doi.org/10.1594/PANGAEA.877674
  23. Kaul, N (2017): Heat flow data at station PS75/192-3. https://doi.org/10.1594/PANGAEA.877675
  24. Kaul, N (2017): Heat flow data at station PS75/194-2. https://doi.org/10.1594/PANGAEA.877676
  25. Kaul, N (2017): Heat flow data at station PS75/195-2. https://doi.org/10.1594/PANGAEA.877677
  26. Kaul, N (2017): Heat flow data at station PS75/210-2. https://doi.org/10.1594/PANGAEA.877678
  27. Kaul, N (2017): Heat flow data at station PS75/214-2. https://doi.org/10.1594/PANGAEA.877679
  28. Kaul, N (2017): Heat flow data at station PS75/216-3. https://doi.org/10.1594/PANGAEA.877680
  29. Kaul, N (2017): Heat flow data at station PS75/230-2. https://doi.org/10.1594/PANGAEA.877681
  30. Kaul, N (2017): Heat flow data at station PS75/260-1. https://doi.org/10.1594/PANGAEA.877682