High resolution modelling of the North Icelandic Irminger Current (NIIC)
The northward inflow of Atlantic Water through Denmark Strait – the North Icelandic Irminger Current (NIIC) – is simulated with a numerical model of the North Atlantic and Arctic Ocean. The model uses the technique of adaptive grid refinement which allows a high spatial resolution (1 km horizontal,...
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Copernicus Publications
2006
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00032829 2023-05-15T15:17:17+02:00 High resolution modelling of the North Icelandic Irminger Current (NIIC) Logemann, K. Harms, I. 2006-12 electronic https://doi.org/10.5194/os-2-291-2006 https://noa.gwlb.de/receive/cop_mods_00032829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032783/os-2-291-2006.pdf https://os.copernicus.org/articles/2/291/2006/os-2-291-2006.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-2-291-2006 https://noa.gwlb.de/receive/cop_mods_00032829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032783/os-2-291-2006.pdf https://os.copernicus.org/articles/2/291/2006/os-2-291-2006.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2006 ftnonlinearchiv https://doi.org/10.5194/os-2-291-2006 2022-02-08T22:46:02Z The northward inflow of Atlantic Water through Denmark Strait – the North Icelandic Irminger Current (NIIC) – is simulated with a numerical model of the North Atlantic and Arctic Ocean. The model uses the technique of adaptive grid refinement which allows a high spatial resolution (1 km horizontal, 10 m vertical) around Iceland. The model is used to assess time and space variability of volume and heat fluxes for the years 1997–2003. Passive tracers are applied to study origin and composition of NIIC water masses. The NIIC originates from two sources: the Irminger Current, flowing as part of the sub-polar gyre in 100–500 m depth along the Reykjanes Ridge and the shallow Icelandic coastal current, flowing north-westward on the south-west Icelandic shelf. The ratio of volume flux between the deep and shallow branch is around 2:1. The NIIC continues as a warm and saline branch northward through Denmark Strait where it entrains large amounts of polar water due to the collision with the southward flowing East Greenland Current. After passing Denmark Strait, the NIIC follows the coast line eastward being an important heat source for north Icelandic waters. At least 60% of the temporal temperature variability of north Icelandic waters is caused by the NIIC. The NIIC volume and heat transport is highly variable and depends strongly on the wind field north-east of Denmark Strait. Daily means can change from 1 Sv eastward to 2 Sv westward within a few days. Highest monthly mean transport rates occur in summer when winds from north are weak, whereas the volume flux is reduced by around 50% in winter. Summer heat flux rates can be even three times higher than in winter. The simulation also shows variability on the interannual scale. In particular weak winds from north during winter 2002/2003 combined with mild weather conditions south of Iceland led to anomalous high NIIC volume (+40%) and heat flux (+60%) rates. In this period, simulated north Icelandic water temperatures are at least 0.5 K warmer than average. Article in Journal/Newspaper Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Greenland Iceland North Atlantic North Icelandic Irminger Current NIIC Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Ocean Science 2 2 291 304 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Logemann, K. Harms, I. High resolution modelling of the North Icelandic Irminger Current (NIIC) |
topic_facet |
article Verlagsveröffentlichung |
description |
The northward inflow of Atlantic Water through Denmark Strait – the North Icelandic Irminger Current (NIIC) – is simulated with a numerical model of the North Atlantic and Arctic Ocean. The model uses the technique of adaptive grid refinement which allows a high spatial resolution (1 km horizontal, 10 m vertical) around Iceland. The model is used to assess time and space variability of volume and heat fluxes for the years 1997–2003. Passive tracers are applied to study origin and composition of NIIC water masses. The NIIC originates from two sources: the Irminger Current, flowing as part of the sub-polar gyre in 100–500 m depth along the Reykjanes Ridge and the shallow Icelandic coastal current, flowing north-westward on the south-west Icelandic shelf. The ratio of volume flux between the deep and shallow branch is around 2:1. The NIIC continues as a warm and saline branch northward through Denmark Strait where it entrains large amounts of polar water due to the collision with the southward flowing East Greenland Current. After passing Denmark Strait, the NIIC follows the coast line eastward being an important heat source for north Icelandic waters. At least 60% of the temporal temperature variability of north Icelandic waters is caused by the NIIC. The NIIC volume and heat transport is highly variable and depends strongly on the wind field north-east of Denmark Strait. Daily means can change from 1 Sv eastward to 2 Sv westward within a few days. Highest monthly mean transport rates occur in summer when winds from north are weak, whereas the volume flux is reduced by around 50% in winter. Summer heat flux rates can be even three times higher than in winter. The simulation also shows variability on the interannual scale. In particular weak winds from north during winter 2002/2003 combined with mild weather conditions south of Iceland led to anomalous high NIIC volume (+40%) and heat flux (+60%) rates. In this period, simulated north Icelandic water temperatures are at least 0.5 K warmer than average. |
format |
Article in Journal/Newspaper |
author |
Logemann, K. Harms, I. |
author_facet |
Logemann, K. Harms, I. |
author_sort |
Logemann, K. |
title |
High resolution modelling of the North Icelandic Irminger Current (NIIC) |
title_short |
High resolution modelling of the North Icelandic Irminger Current (NIIC) |
title_full |
High resolution modelling of the North Icelandic Irminger Current (NIIC) |
title_fullStr |
High resolution modelling of the North Icelandic Irminger Current (NIIC) |
title_full_unstemmed |
High resolution modelling of the North Icelandic Irminger Current (NIIC) |
title_sort |
high resolution modelling of the north icelandic irminger current (niic) |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doi.org/10.5194/os-2-291-2006 https://noa.gwlb.de/receive/cop_mods_00032829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032783/os-2-291-2006.pdf https://os.copernicus.org/articles/2/291/2006/os-2-291-2006.pdf |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Arctic Arctic Ocean Greenland Reykjanes |
geographic_facet |
Arctic Arctic Ocean Greenland Reykjanes |
genre |
Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Greenland Iceland North Atlantic North Icelandic Irminger Current NIIC |
genre_facet |
Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Greenland Iceland North Atlantic North Icelandic Irminger Current NIIC |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-2-291-2006 https://noa.gwlb.de/receive/cop_mods_00032829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032783/os-2-291-2006.pdf https://os.copernicus.org/articles/2/291/2006/os-2-291-2006.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-2-291-2006 |
container_title |
Ocean Science |
container_volume |
2 |
container_issue |
2 |
container_start_page |
291 |
op_container_end_page |
304 |
_version_ |
1766347542806659072 |