Observations of Double Diffusive Staircase Edges in the Arctic Ocean
Name
JGR Oceans - 2022 - Boury - Observations of Double Diffusive Staircase Edges in the Arctic Ocean.pdf
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2.07 MB
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Author(s)
Boury, S.
Supekar, R.
Fine, E. C.
Musgrave, R.
Mickett, J. B.
Voet, G.
Odier, P.
Peacock, T.
MacKinnon, J. A.
Alford, M. H.
Date Issued
October 27, 2022
Journal
Journal of Geophysical Research: Oceans
Publisher
American Geophysical Union
Citation
Boury, S., Supekar, R., Fine, E. C., Musgrave, R., Mickett, J. B., Voet, G., et al. (2022). Observations of double diffusive staircase edges in the Arctic Ocean. Journal of Geophysical Research: Oceans, 127, e2022JC018906.
Version
Final published version
Abstract
Recent observational studies have provided detailed descriptions of double‐diffusive staircases in the Beaufort Sea, characterized by well‐mixed intrusions between high‐gradient interfaces. These structures result from double‐diffusive convection, occurring when cooler fresh water lies atop the warmer saltier Atlantic water layer. In the present study, we investigate the spatial structure of such layers, by analyzing combined high resolution data from a subsurface mooring, a ship‐towed profiling conductivity‐temperature‐depth/ADCP package, and a free‐falling microstructure profiler. At large scale, the modular microstructure profiler data suggest a horizontal “ragged edge” of the layered water masses near the basin boundary. At smaller scales, the mooring data indicate that, in the 300–400 m depth interval, regions of layers abruptly appear. This laterally sharp (of the order of 100 m) interface is advected southwards, as shown by the shallow water integrated mapping system survey conducted nearby. Neither disruption nor formation of layers is directly observed in our data, and we thus interpret our observations as the stable and possibly recent abutment of a layered and an unlayered water masses, now globally advected southwards by a large scale flow.
Subjects
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science
Geochemistry and Petrology
Geophysics
Oceanography
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Woods Hole Oceanographic Institution
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1029/2022jc018906
