Elevated geothermal surface heat flow in the Amundsen Sea Embayment, West Antarctica

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • R. Dziadek - , Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (Autor:in)
  • K. Gohl - , Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (Autor:in)
  • N. Kaul - , Universität Bremen (Autor:in)
  • Science Team of Expedition PS104 - (Autor:in)
  • Mirko Scheinert - , Professur für Geodätische Erdsystemforschung (Autor:in)
  • Benjamin Ebermann - (Autor:in)

Abstract

The thermal state of polar continental crust plays a crucial role for understanding the stability and thickness of large ice sheets, the visco-elastic response of the solid Earth due to unloading when large ice caps melt and, in turn, the accuracy of future sea-level rise prediction. Various studies demonstrate the need for precise measurements and estimation of geothermal heat flow (GHF) in Antarctica for better constrained boundary conditions to enhance the ice sheet model performance. This study provides ground-truth for regional indirect GHF estimates in the Amundsen Sea Embayment, which is part of the West Antarctic Rift System, by presenting in situ temperature measurements in continental shelf sediments. Our results show regionally elevated and heterogeneous GHF (mean of 65 mW m−2) in the Amundsen Sea Embayment. Considering thermal blanketing effects, induced by inflow of warmer water and sedimentary processes, the estimated GHF ranges between 65 mW m−2 and 95 mW m−2.

Details

OriginalspracheEnglisch
Seiten (von - bis)530-539
FachzeitschriftEarth and Planetary Science Letters
Jahrgang506
PublikationsstatusVeröffentlicht - 6 Dez. 2018
Peer-Review-StatusJa

Externe IDs

Scopus 85057822986
ORCID /0000-0002-0892-8941/work/142248901

Schlagworte

Bibliotheksschlagworte