Heat Flow on the U.S. Beaufort Margin, Arctic Ocean: Implications for Ocean Warming, Methane Hydrate Stability, and Regional Tectonics
Abstract
The Arctic Ocean represents one of the last geological frontiers on Earth. The formation of the Arctic Ocean remains unclear, and although it is well understood that the Arctic surface temperature is warming at a rate approximately twice as fast as the rest of the Earth, it is unclear how deep Arctic Ocean temperatures are changing. Understanding whether deep Arctic Ocean water is warming is important, since it can lead to the breakdown and release of huge quantities of frozen methane molecules trapped below the Arctic seafloor, which can increase ocean acidity and destabilize the seafloor. To understand both Arctic Ocean temperature change and geologic evolution, we collected temperature measurements at 103 sites. These measurements tell us how temperature increases with depth below the seafloor and can be used to understand both ocean temperature change and regional geology. Analysis of our data shows that at depths of 300–900 m below sea level, the Arctic Ocean has been warming steadily for perhaps several decades—nearly twice as deep as previous studies suggest. At ocean depths greater than 1,000 m, our analysis also reveals surprisingly high temperature increases with depth in the seafloor. The cause of these significant increases is unclear.
- Authors:
-
[1];
[2];
[3]
- Southern Methodist University, Dallas, TX (United States). Huffington Department of Earth Sciences
- Oregon State University, Corvallis, OR (United States). Huffington Department of Earth Sciences
- Oregon State University, Corvallis, OR (United States). Huffington Department of Earth Sciences; Stennis Space Center MS (United States). Naval Research Lab
- Publication Date:
- Research Org.:
- Southern Methodist Univ., Dallas, TX (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1799746
- Grant/Contract Number:
- FE0010180
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geochemistry, Geophysics, Geosystems
- Additional Journal Information:
- Journal Volume: 21; Journal Issue: 5; Journal ID: ISSN 1525-2027
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Geochemistry & Geophysics
Citation Formats
Hornbach, Matthew J., Harris, Robert N., and Phrampus, Benjamin J. Heat Flow on the U.S. Beaufort Margin, Arctic Ocean: Implications for Ocean Warming, Methane Hydrate Stability, and Regional Tectonics. United States: N. p., 2020.
Web. doi:10.1029/2020gc008933.
Hornbach, Matthew J., Harris, Robert N., & Phrampus, Benjamin J. Heat Flow on the U.S. Beaufort Margin, Arctic Ocean: Implications for Ocean Warming, Methane Hydrate Stability, and Regional Tectonics. United States. https://doi.org/10.1029/2020gc008933
Hornbach, Matthew J., Harris, Robert N., and Phrampus, Benjamin J. Fri .
"Heat Flow on the U.S. Beaufort Margin, Arctic Ocean: Implications for Ocean Warming, Methane Hydrate Stability, and Regional Tectonics". United States. https://doi.org/10.1029/2020gc008933. https://www.osti.gov/servlets/purl/1799746.
@article{osti_1799746,
title = {Heat Flow on the U.S. Beaufort Margin, Arctic Ocean: Implications for Ocean Warming, Methane Hydrate Stability, and Regional Tectonics},
author = {Hornbach, Matthew J. and Harris, Robert N. and Phrampus, Benjamin J.},
abstractNote = {The Arctic Ocean represents one of the last geological frontiers on Earth. The formation of the Arctic Ocean remains unclear, and although it is well understood that the Arctic surface temperature is warming at a rate approximately twice as fast as the rest of the Earth, it is unclear how deep Arctic Ocean temperatures are changing. Understanding whether deep Arctic Ocean water is warming is important, since it can lead to the breakdown and release of huge quantities of frozen methane molecules trapped below the Arctic seafloor, which can increase ocean acidity and destabilize the seafloor. To understand both Arctic Ocean temperature change and geologic evolution, we collected temperature measurements at 103 sites. These measurements tell us how temperature increases with depth below the seafloor and can be used to understand both ocean temperature change and regional geology. Analysis of our data shows that at depths of 300–900 m below sea level, the Arctic Ocean has been warming steadily for perhaps several decades—nearly twice as deep as previous studies suggest. At ocean depths greater than 1,000 m, our analysis also reveals surprisingly high temperature increases with depth in the seafloor. The cause of these significant increases is unclear.},
doi = {10.1029/2020gc008933},
journal = {Geochemistry, Geophysics, Geosystems},
number = 5,
volume = 21,
place = {United States},
year = {Fri May 08 00:00:00 EDT 2020},
month = {Fri May 08 00:00:00 EDT 2020}
}
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- Earth and Planetary Science Letters, Vol. 295, Issue 3-4