NDLI: Atmospheric forcing of Fram Strait sea ice export: a closer look

Content Provider	Springer Nature Link
Author	Tsukernik, Maria Deser, Clara Alexander, Michael Tomas, Robert
Copyright Year	2009
Abstract	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.
Starting Page	1349
Ending Page	1360
Page Count	12
File Format	PDF
ISSN	09307575
Journal	Climate Dynamics
Volume Number	35
Issue Number	7-8
e-ISSN	14320894
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-08-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fram Strait Sea ice motion Sea ice export North Atlantic Oscillation East–west dipole High frequency atmospheric variability Oceanography Meteorology/Climatology Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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Atmospheric forcing of Fram Strait sea ice export: a closer look

2009), Atmospheric forcing of Fram Strait sea ice export: a closer

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