Observations of double diffusive staircase edges in the Arctic Ocean

dc.contributor.author Boury, Samuel
dc.contributor.author Supekar, Rohit
dc.contributor.author Fine, Elizabeth C.
dc.contributor.author Musgrave, Ruth C.
dc.contributor.author Mickett, John B.
dc.contributor.author Voet, Gunnar
dc.contributor.author Odier, Philippe
dc.contributor.author Peacock, Thomas
dc.contributor.author MacKinnon, Jennifer A.
dc.contributor.author Alford, Matthew H.
dc.date.accessioned 2023-04-21T19:11:16Z
dc.date.available 2023-04-21T19:11:16Z
dc.date.issued 2022-10-12
dc.description Author Posting. © American Geophysical Union, 2022. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 127(11), (2022): e2022JC018906, https://doi.org/10.1029/2022JC018906 .
dc.description.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.
dc.description.sponsorship This work was supported by NSF Grants PLR 14-56705 and PLR-1303791 and by NSF Graduate Research Fellowship Grant DGE-1650112. This work was also partially funded by ONR Grant N000141612450.
dc.identifier.citation Boury, S., Supekar, R., Fine, E. C., Musgrave, R., Mickett, J. b., Voet, G., Odier, P., Peacock, T., MacKinnon, J. a., & Alford, M. H. (2022). Observations of double diffusive staircase edges in the Arctic Ocean. Journal of Geophysical Research: Oceans, 127(11), e2022JC018906.
dc.identifier.doi 10.1029/2022JC018906
dc.identifier.uri https://hdl.handle.net/1912/66011
dc.publisher American Geophysical Union
dc.relation.uri https://doi.org/10.1029/2022JC018906
dc.subject Double diffusive staircase
dc.subject Arctic
dc.title Observations of double diffusive staircase edges in the Arctic Ocean
dc.type Article
dspace.entity.type Publication
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