Rights statement: This is the author’s version of a work that was accepted for publication in Earth and Planetary Science Letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Earth and Planetary Science Letters, 506, 2019 DOI: 10.1016/j.epsl.2018.11.003
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Elevated geothermal surface heat flow in the Amundsen Sea Embayment, West Antarctica
AU - Sci Team Expedition PS104
AU - Dziadek, R.
AU - Gohl, K.
AU - Kaul, N.
AU - Uenzelmann-Neben, Gabriele
AU - Hochmuth, Katharina
AU - Riefstahl, Florian
AU - Gebhardt, Catalina
AU - Arndt, Jan-Erik
AU - Klages, Johann
AU - Esper, Oliver
AU - Ronge, Thomas
AU - Kuessner, Kevin
AU - Kuehn, Gerhard
AU - Larter, Robert
AU - Hillenbrand, Claus-Dieter
AU - Smith, James
AU - Bickert, Torsten
AU - Palike, Heiko
AU - Frederichs, Thomas
AU - Freudenthal, Tim
AU - Zundel, Maximilian
AU - Spiegel, Cornelia
AU - Ehrmann, Werner
AU - Bohaty, Steve
AU - van de Flierdt, Tina
AU - Pereira, Simoes Patric
AU - Najman, Yani
AU - Scheinert, Mirko
AU - Ebermann, Benjamin
AU - Afanasyeva, Victoria
N1 - This is the author’s version of a work that was accepted for publication in Earth and Planetary Science Letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Earth and Planetary Science Letters, 506, 2019 DOI: 10.1016/j.epsl.2018.11.003
PY - 2019/1/15
Y1 - 2019/1/15
N2 - 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). (C) 2018 Elsevier B.V. All rights reserved.
AB - 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). (C) 2018 Elsevier B.V. All rights reserved.
KW - skin depth for geothermal gradients
KW - spatial variation of geothermal heat flow on small scales
KW - in situ temperature measurements
KW - geotherm transition
KW - CIRCUMPOLAR DEEP-WATER
KW - PINE ISLAND BAY
KW - CONTINENTAL-SHELF
KW - ICE
KW - FLUX
KW - TEMPERATURE
KW - BOREHOLE
KW - CONSTRAINTS
KW - VARIABILITY
KW - SATELLITE
U2 - 10.1016/j.epsl.2018.11.003
DO - 10.1016/j.epsl.2018.11.003
M3 - Journal article
VL - 506
SP - 530
EP - 539
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
SN - 0012-821X
ER -