Show simple item record

dc.contributor.authorSemper, Stefanie
dc.contributor.authorVåge, Kjetil
dc.contributor.authorPickart, Robert S.
dc.contributor.authorValdimarsson, Hedinn
dc.contributor.authorTorres, Daniel J.
dc.contributor.authorJónsson, Steingrímur
dc.PublishedSemper S, Våge K, Pickart RS, Valdimarsson H, Torres DJ, Jónsson S. The Emergence of the North Icelandic Jet and Its Evolution from Northeast Iceland to Denmark Strait. Journal of Physical Oceanography. 2019;49:2499-2521eng
dc.description.abstractThe North Icelandic Jet (NIJ) is an important source of dense water to the overflow plume passing through Denmark Strait. The properties, structure, and transport of the NIJ are investigated for the first time along its entire pathway following the continental slope north of Iceland, using 13 hydrographic/velocity surveys of high spatial resolution conducted between 2004 and 2018. The comprehensive dataset reveals that the current originates northeast of Iceland and increases in volume transport by roughly 0.4 Sv (1 Sv ≡ 106 m3 s−1) per 100 km until 300 km upstream of Denmark Strait, at which point the highest transport is reached. The bulk of the NIJ transport is confined to a small area in Θ–S space centered near −0.29° ± 0.16°C in Conservative Temperature and 35.075 ± 0.006 g kg−1 in Absolute Salinity. While the hydrographic properties of this transport mode are not significantly modified along the NIJ’s pathway, the transport estimates vary considerably between and within the surveys. Neither a clear seasonal signal nor a consistent link to atmospheric forcing was found, but barotropic and/or baroclinic instability is likely active in the current. The NIJ displays a double-core structure in roughly 50% of the occupations, with the two cores centered at the 600- and 800-m isobaths, respectively. The transport of overflow water 300 km upstream of Denmark Strait exceeds 1.8 ± 0.3 Sv, which is substantially larger than estimates from a year-long mooring array and hydrographic/velocity surveys closer to the strait, where the NIJ merges with the separated East Greenland Current. This implies a more substantial contribution of the NIJ to the Denmark Strait overflow plume than previously envisaged.en_US
dc.publisherAmerican Meteorological Societyen_US
dc.rightsAttribution CC BYeng
dc.titleThe Emergence of the North Icelandic Jet and Its Evolution from Northeast Iceland to Denmark Straiten_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2019 American Meteorological Societyen_US
dc.source.journalJournal of Physical Oceanography
dc.relation.projectNorges forskningsråd: 231647
dc.relation.projectBergens forskningsstiftelse: BFS2016REK01

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution CC BY
Except where otherwise noted, this item's license is described as Attribution CC BY