The University of Southampton
University of Southampton Institutional Repository

Subannual and seasonal variability of Atlantic-origin waters in two adjacent West Greenland Fjords

Subannual and seasonal variability of Atlantic-origin waters in two adjacent West Greenland Fjords
Subannual and seasonal variability of Atlantic-origin waters in two adjacent West Greenland Fjords

Greenland fjords provide a pathway for the inflow of warm shelf waters to glacier termini and outflow of glacially modified waters to the coastal ocean. Characterizing the dominant modes of variability in fjord circulation, and how they vary over subannual and seasonal time scales, is critical for predicting ocean heat transport to the ice. Here we present a 2-year hydrographic record from a suite of moorings in Davis Strait and two neighboring west Greenland fjords that exhibit contrasting fjord and glacier geometry (Kangerdlugssuaq Sermerssua and Rink Isbræ). Hydrographic variability above the sill exhibits clear seasonality, with a progressive cooling of near-surface waters and shoaling of deep isotherms above the sill during winter to spring. Renewal of below-sill waters coincides with the arrival of dense waters at the fjord mouth; warm, salty Atlantic-origin water cascades into fjord basins from winter to midsummer. We then use Seaglider observations at Davis Strait, along with reanalysis of sea ice and wind stress in Baffin Bay, to explore the role of the West Greenland Current and local air-sea forcing in driving fjord renewal. These results demonstrate the importance of both remote and local processes in driving renewal of near-terminus waters, highlighting the need for sustained observations and improved ocean models that resolve the complete slope-trough-fjord-ice system.

boundary current, coastal oceanography, fjord, glacier, Greenland, ocean-ice interactions
2169-9275
Carroll, D.
5768ff5c-aa0b-49ff-ba36-3cf02eded0b8
Sutherland, D. A.
2e6454ef-8aaa-418f-848b-7e60cf0ede72
Curry, B.
322da730-04fb-42fc-8871-a2225a2b8017
Nash, J. D.
a493669f-c816-4387-a8ec-f64ec19f05a4
Shroyer, E. L.
d3b53280-149d-4a87-b70a-e20a9559cbd4
Catania, G. A.
69a4d09c-7755-435f-9fcf-8ad0bdcdd833
Stearns, L. A.
6abd02f3-936b-4264-80c9-c0596e7c21c3
Grist, J. P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Lee, C. M.
acecb7c6-e215-4153-a26c-7c13b8022b34
de Steur, L.
0dfd7d2f-ece9-40e7-8862-c020b5d1b886
Carroll, D.
5768ff5c-aa0b-49ff-ba36-3cf02eded0b8
Sutherland, D. A.
2e6454ef-8aaa-418f-848b-7e60cf0ede72
Curry, B.
322da730-04fb-42fc-8871-a2225a2b8017
Nash, J. D.
a493669f-c816-4387-a8ec-f64ec19f05a4
Shroyer, E. L.
d3b53280-149d-4a87-b70a-e20a9559cbd4
Catania, G. A.
69a4d09c-7755-435f-9fcf-8ad0bdcdd833
Stearns, L. A.
6abd02f3-936b-4264-80c9-c0596e7c21c3
Grist, J. P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Lee, C. M.
acecb7c6-e215-4153-a26c-7c13b8022b34
de Steur, L.
0dfd7d2f-ece9-40e7-8862-c020b5d1b886

Carroll, D., Sutherland, D. A., Curry, B., Nash, J. D., Shroyer, E. L., Catania, G. A., Stearns, L. A., Grist, J. P., Lee, C. M. and de Steur, L. (2018) Subannual and seasonal variability of Atlantic-origin waters in two adjacent West Greenland Fjords. Journal of Geophysical Research: Oceans. (doi:10.1029/2018JC014278).

Record type: Article

Abstract

Greenland fjords provide a pathway for the inflow of warm shelf waters to glacier termini and outflow of glacially modified waters to the coastal ocean. Characterizing the dominant modes of variability in fjord circulation, and how they vary over subannual and seasonal time scales, is critical for predicting ocean heat transport to the ice. Here we present a 2-year hydrographic record from a suite of moorings in Davis Strait and two neighboring west Greenland fjords that exhibit contrasting fjord and glacier geometry (Kangerdlugssuaq Sermerssua and Rink Isbræ). Hydrographic variability above the sill exhibits clear seasonality, with a progressive cooling of near-surface waters and shoaling of deep isotherms above the sill during winter to spring. Renewal of below-sill waters coincides with the arrival of dense waters at the fjord mouth; warm, salty Atlantic-origin water cascades into fjord basins from winter to midsummer. We then use Seaglider observations at Davis Strait, along with reanalysis of sea ice and wind stress in Baffin Bay, to explore the role of the West Greenland Current and local air-sea forcing in driving fjord renewal. These results demonstrate the importance of both remote and local processes in driving renewal of near-terminus waters, highlighting the need for sustained observations and improved ocean models that resolve the complete slope-trough-fjord-ice system.

Full text not available from this repository.

More information

Accepted/In Press date: 26 July 2018
e-pub ahead of print date: 6 August 2018
Keywords: boundary current, coastal oceanography, fjord, glacier, Greenland, ocean-ice interactions

Identifiers

Local EPrints ID: 423747
URI: https://eprints.soton.ac.uk/id/eprint/423747
ISSN: 2169-9275
PURE UUID: ef38b01f-e15f-49f6-99da-c6f1bc6777ed

Catalogue record

Date deposited: 01 Oct 2018 16:30
Last modified: 01 Oct 2018 16:30

Export record

Altmetrics

Contributors

Author: D. Carroll
Author: D. A. Sutherland
Author: B. Curry
Author: J. D. Nash
Author: E. L. Shroyer
Author: G. A. Catania
Author: L. A. Stearns
Author: J. P. Grist
Author: C. M. Lee
Author: L. de Steur

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×