Seasonal variability in warm-water inflow towards Kangerdlugssuaq Fjord.

Gelderloos, Renske, Haine, Thomas W. N., Koszalka, Inga Monika and Magaldi, Marcello G. (2017) Seasonal variability in warm-water inflow towards Kangerdlugssuaq Fjord. Open Access Journal of Physical Oceanography, 47 (7). pp. 1685-1699. DOI 10.1175/JPO-D-16-0202.1.

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Seasonal variability in pathways of warm water masses toward the Kangerdlugssuaq Fjord-Glacier system (KF/KG), southeast Greenland, is investigated by backtracking Lagrangian particles seeded at the fjord mouth in a high-resolution regional ocean model simulation in the ice-free and the ice-covered seasons. The waters at KF are a mixture of Atlantic-origin water advected from the Irminger Basin (FF for Faxaflói), the deep waters from the Denmark Strait and the waters from the Arctic Ocean, both represented by the Kögur section (KO). Below 200m depth, the warm water is a mixture of FF and KO water masses, and is warmer in winter than in summer. We find that seasonal differences in pathways double the fraction of FF particles in winter, causing the seasonal warming and salinification. Seasonal temperature variations at the upstream sections (FF and KO) have a negligible impact on temperature variations near the fjord. Successful monitoring of heat flux to the fjord therefore needs to take place close to the fjord, and cannot be inferred from upstream conditions.

Document Type: Article
Keywords: Lagrangian circulation/transport
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1175/JPO-D-16-0202.1
ISSN: 0022-3670
Date Deposited: 12 May 2017 11:16
Last Modified: 01 Feb 2019 15:04

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