A warm jet in a cold ocean

Jennifer A. MacKinnon, Harper L. Simmons, John Hargrove, Jim Thomson, Thomas Peacock, Matthew H. Alford, Benjamin I. Barton, Samuel Boury, Samuel D. Brenner, Nicole Couto, Seth L. Danielson, Elizabeth C. Fine, Hans C. Graber, John Guthrie, Joanne E. Hopkins, Steven R. Jayne, Chanhyung Jeon, Thilo Klenz, Craig M. Lee, Yueng Djern LennAndrew J. Lucas, Björn Lund, Claire Mahaffey, Louisa Norman, Luc Rainville, Madison M. Smith, Leif N. Thomas, Sinhué Torres-Valdés, Kevin R. Wood

Research output: Contribution to journalArticlepeer-review

Abstract

Unprecedented quantities of heat are entering the Pacific sector of the Arctic Ocean through Bering Strait, particularly during summer months. Though some heat is lost to the atmosphere during autumn cooling, a significant fraction of the incoming warm, salty water subducts (dives beneath) below a cooler fresher layer of near-surface water, subsequently extending hundreds of kilometers into the Beaufort Gyre. Upward turbulent mixing of these sub-surface pockets of heat is likely accelerating sea ice melt in the region. This Pacific-origin water brings both heat and unique biogeochemical properties, contributing to a changing Arctic ecosystem. However, our ability to understand or forecast the role of this incoming water mass has been hampered by lack of understanding of the physical processes controlling subduction and evolution of this this warm water. Crucially, the processes seen here occur at small horizontal scales not resolved by regional forecast models or climate simulations; new parameterizations must be developed that accurately represent the physics. Here we present novel high resolution observations showing the detailed process of subduction and initial evolution of warm Pacific-origin water in the southern Beaufort Gyre.

Original languageEnglish (US)
Article number2418
JournalNature communications
Volume12
Issue number1
DOIs
StatePublished - Dec 2021
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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