Variability and redistribution of heat in the Atlantic Water boundary current north of Svalbard Renner, Angelika H. H. Sundfjord, Arild Janout, Markus A. Ingvaldsen, Randi B. Beszczynska-Möller, Agnieszka Pickart, Robert S. Pérez-Hernández, M. Dolores 2018-11-01T15:06:39Z 2018-11-01T15:06:39Z 2018-09-12
dc.description © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Journal of Geophysical Research: Oceans 123 (2018): 6373-6391, doi:10.1029/2018JC013814. en_US
dc.description.abstract We quantify Atlantic Water heat loss north of Svalbard using year‐long hydrographic and current records from three moorings deployed across the Svalbard Branch of the Atlantic Water boundary current in 2012–2013. The boundary current loses annually on average 16 W m−2 during the eastward propagation along the upper continental slope. The largest vertical fluxes of >100 W m−2 occur episodically in autumn and early winter. Episodes of sea ice imported from the north in November 2012 and February 2013 coincided with large ocean‐to‐ice heat fluxes, which effectively melted the ice and sustained open water conditions in the middle of the Arctic winter. Between March and early July 2013, a persistent ice cover‐modulated air‐sea fluxes. Melting sea ice at the start of the winter initiates a cold, up to 100‐m‐deep halocline separating the ice cover from the warm Atlantic Water. Semidiurnal tides dominate the energy over the upper part of the slope. The vertical tidal structure depends on stratification and varies seasonally, with the potential to contribute to vertical fluxes with shear‐driven mixing. Further processes impacting the heat budget include lateral heat loss due to mesoscale eddies, and modest and negligible contributions of Ekman pumping and shelf break upwelling, respectively. The continental slope north of Svalbard is a key example regarding the role of ocean heat for the sea ice cover. Our study underlines the complexity of the ocean's heat budget that is sensitive to the balance between oceanic heat advection, vertical fluxes, air‐sea interaction, and the sea ice cover. en_US
dc.description.sponsorship Arctic Ocean program at the FRAM-High North Research Centre for Climate and the environment; National Science Foundation (NSF) Grant Number: ARC-1264098; Polish-Norwegian Research Programme Grant Number: POL-NOR/202006/10/2013; Research Council of Norway Grant Number: 276730; Steven Grossman Family Foundation en_US
dc.identifier.citation Journal of Geophysical Research: Oceans 123 (2018): 6373-6391 en_US
dc.identifier.doi 10.1029/2018JC013814
dc.language.iso en_US en_US
dc.publisher John Wiley & Sons en_US
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject Atlantic Water en_US
dc.subject Arctic Ocean en_US
dc.subject Heat flux en_US
dc.subject Nansen Basin en_US
dc.subject Boundary current en_US
dc.subject A‐TWAIN en_US
dc.title Variability and redistribution of heat in the Atlantic Water boundary current north of Svalbard en_US
dc.type Article en_US
dspace.entity.type Publication
relation.isAuthorOfPublication cd4c41de-4001-496d-be17-335ecd69a76b
relation.isAuthorOfPublication 37b4342f-f9e7-4d9b-a865-13b13a38a49f
relation.isAuthorOfPublication d2a851c7-ae31-4503-9fa5-341d3412f207
relation.isAuthorOfPublication 9e963205-4225-4e2a-be14-1b312738ef4c
relation.isAuthorOfPublication 65deb4b0-20e9-4089-8dbb-ab0f3c53fe9f
relation.isAuthorOfPublication 629648a2-02e4-4240-96ab-9d641347f727
relation.isAuthorOfPublication f4ec52c5-afdc-423f-9a3f-e87c7a036253
relation.isAuthorOfPublication.latestForDiscovery cd4c41de-4001-496d-be17-335ecd69a76b
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
3.1 MB
Adobe Portable Document Format
Thumbnail Image
917.03 KB
Adobe Portable Document Format
Supporting Information S1
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
1.89 KB
Item-specific license agreed upon to submission