Arctic Ocean outflow and glacier-ocean interactions modify water over the Wandel Sea shelf (northeastern Greenland)

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review

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  • Author: Dmitrenko, Igor A.

    University of Manitoba, Canada

  • Author: Kirillov, Sergey A.

    University of Manitoba, Canada

  • Author: Rudels, Bert

    Finnish Meteorological Institute, Finland

  • Author: Babb, David G.

    University of Manitoba, Canada

  • Author: Pedersen, Leif Toudal

    Microwaves and Remote Sensing, National Space Institute, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Rysgaard, Soren

    University of Manitoba, Canada

  • Author: Kristoffersen, Yngve

    University of Bergen, Norway

  • Author: Barber, David G.

    University of Manitoba, Canada

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The first-ever conductivity-temperature-depth (CTD) observations on the Wandel Sea shelf in northeastern Greenland were collected in April-May 2015. They were complemented by CTDs taken along the continental slope during the Norwegian FRAM 2014-2015 drift. The CTD profiles are used to reveal the origin of water masses and interactions with ambient water from the continental slope and the tidewater glacier outlet. The subsurface water is associated with the Pacific water outflow from the Arctic Ocean. The underlying halocline separates the Pacific water from a deeper layer of polar water that has interacted with the warm Atlantic water outflow through the Fram Strait, recorded below 140 m. Over the outer shelf, the halocline shows numerous cold density-compensated intrusions indicating lateral interaction with an ambient polar water mass across the continental slope. At the front of the tidewater glacier outlet, colder and turbid water intrusions were observed at the base of the halocline. On the temperature-salinity plots these stations indicate a mixing line that is different from the ambient water and seems to be conditioned by the ocean-glacier interaction. Our observations of Pacific water are set within the context of upstream observations in the Beaufort Sea and downstream observations from the Northeast Water Polynya, and clearly show the modification of Pacific water during its advection across the Arctic Ocean. Moreover, ambient water over the Wandel Sea slope shows different thermohaline structures indicating the different origin and pathways of the on-shore and off-shore branches of the Arctic Ocean outflow through the western Fram Strait.
Original languageEnglish
JournalOcean Science
Volume13
Issue number6
Pages (from-to)1045-1060
Number of pages16
ISSN1812-0784
DOIs
Publication statusPublished - 2017
CitationsWeb of Science® Times Cited: No match on DOI

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