Atmospheric forcing of Fram Strait sea ice export: A closer look
Fram Strait is the primary region of sea ice export from the Arctic and therefore plays an important role in regulating the amount of sea ice and freshwater within the Arctic. We investigate the variability of Fram Strait sea ice motion and the role of atmospheric circulation forcing using daily dat...
Published in: | Climate Dynamics |
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ftncar:oai:drupal-site.org:articles_10584 2023-09-05T13:17:17+02:00 Atmospheric forcing of Fram Strait sea ice export: A closer look Tsukernik, Maria (author) Deser, Clara (author) Alexander, Michael (author) Tomas, Robert (author) 2010-12-01 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-650 https://doi.org/10.1007/s00382-009-0647-z en eng Springer Climate Dynamics http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-650 doi:10.1007/s00382-009-0647-z ark:/85065/d75t3kzp An edited version of this paper was published by Springer. Copyright Springer-Verlag 2009. Fram Strait Sea ice motion Sea ice export North Atlantic Oscillation East-west dipole High frequency atmospheric variability Text article 2010 ftncar https://doi.org/10.1007/s00382-009-0647-z 2023-08-14T18:36:42Z Fram Strait is the primary region of sea ice export from the Arctic and therefore plays an important role in regulating the amount of sea ice and freshwater within the Arctic. We investigate the variability of Fram Strait sea ice motion and the role of atmospheric circulation forcing using daily data during the period 1979-2006. The most prominent atmospheric driver of anomalous sea ice motion across Fram Strait is an east-west dipole pattern of Sea Level Pressure (SLP) anomalies with centers of action located over the Barents Sea and Greenland. This pattern, also observed in synoptic studies, is associated with anomalous meridional winds across Fram Strait and is thus physically consistent with forcing changes in sea ice motion. The association between the SLP dipole pattern and Fram Strait ice motion is maximized at 0-lag, persists year-round, and is strongest on time scales of 10-60 days. The SLP dipole pattern is the second empirical orthogonal function (EOF) of daily SLP anomalies in both winter and summer. When the analysis is repeated with monthly data, only the Barents center of the SLP dipole remains significantly correlated with Fram Strait sea ice motion. However, after removing the leading EOF of monthly SLP variability (e.g., the North Atlantic Oscillation), the full east-west dipole pattern is recovered. No significant SLP forcing of Fram Strait ice motion is found in summer using monthly data, even when the leading EOF is removed. Our results highlight the importance of high frequency atmospheric variability in forcing Fram Strait sea ice motion. Article in Journal/Newspaper Arctic Barents Sea Fram Strait Greenland North Atlantic North Atlantic oscillation Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Barents Sea Greenland Climate Dynamics 35 7-8 1349 1360 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Fram Strait Sea ice motion Sea ice export North Atlantic Oscillation East-west dipole High frequency atmospheric variability |
spellingShingle |
Fram Strait Sea ice motion Sea ice export North Atlantic Oscillation East-west dipole High frequency atmospheric variability Atmospheric forcing of Fram Strait sea ice export: A closer look |
topic_facet |
Fram Strait Sea ice motion Sea ice export North Atlantic Oscillation East-west dipole High frequency atmospheric variability |
description |
Fram Strait is the primary region of sea ice export from the Arctic and therefore plays an important role in regulating the amount of sea ice and freshwater within the Arctic. We investigate the variability of Fram Strait sea ice motion and the role of atmospheric circulation forcing using daily data during the period 1979-2006. The most prominent atmospheric driver of anomalous sea ice motion across Fram Strait is an east-west dipole pattern of Sea Level Pressure (SLP) anomalies with centers of action located over the Barents Sea and Greenland. This pattern, also observed in synoptic studies, is associated with anomalous meridional winds across Fram Strait and is thus physically consistent with forcing changes in sea ice motion. The association between the SLP dipole pattern and Fram Strait ice motion is maximized at 0-lag, persists year-round, and is strongest on time scales of 10-60 days. The SLP dipole pattern is the second empirical orthogonal function (EOF) of daily SLP anomalies in both winter and summer. When the analysis is repeated with monthly data, only the Barents center of the SLP dipole remains significantly correlated with Fram Strait sea ice motion. However, after removing the leading EOF of monthly SLP variability (e.g., the North Atlantic Oscillation), the full east-west dipole pattern is recovered. No significant SLP forcing of Fram Strait ice motion is found in summer using monthly data, even when the leading EOF is removed. Our results highlight the importance of high frequency atmospheric variability in forcing Fram Strait sea ice motion. |
author2 |
Tsukernik, Maria (author) Deser, Clara (author) Alexander, Michael (author) Tomas, Robert (author) |
format |
Article in Journal/Newspaper |
title |
Atmospheric forcing of Fram Strait sea ice export: A closer look |
title_short |
Atmospheric forcing of Fram Strait sea ice export: A closer look |
title_full |
Atmospheric forcing of Fram Strait sea ice export: A closer look |
title_fullStr |
Atmospheric forcing of Fram Strait sea ice export: A closer look |
title_full_unstemmed |
Atmospheric forcing of Fram Strait sea ice export: A closer look |
title_sort |
atmospheric forcing of fram strait sea ice export: a closer look |
publisher |
Springer |
publishDate |
2010 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-650 https://doi.org/10.1007/s00382-009-0647-z |
geographic |
Arctic Barents Sea Greenland |
geographic_facet |
Arctic Barents Sea Greenland |
genre |
Arctic Barents Sea Fram Strait Greenland North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Barents Sea Fram Strait Greenland North Atlantic North Atlantic oscillation Sea ice |
op_relation |
Climate Dynamics http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-650 doi:10.1007/s00382-009-0647-z ark:/85065/d75t3kzp |
op_rights |
An edited version of this paper was published by Springer. Copyright Springer-Verlag 2009. |
op_doi |
https://doi.org/10.1007/s00382-009-0647-z |
container_title |
Climate Dynamics |
container_volume |
35 |
container_issue |
7-8 |
container_start_page |
1349 |
op_container_end_page |
1360 |
_version_ |
1776198511605317632 |