Atmospheric influences on Fram Strait sea ice export

1
Atmospheric influences on Fram Strait sea ice
export
Maria Tsukernik, Clara Deser, Robert Tomas,
Michael Alexander
2
Regression of SLP on southward ice motion through
Fram Strait

• Data
• Daily 1979-2006
• NCEP SLP
• Polar Pathfinder 25km ice motion
• Regression
• Synoptically realistic SLP pattern
• Not NAO/AO-like
• Barents Oscillation
• Northerly winds in Fram Strait

hPa/cms-1
3
SLP gradient and ice motion correlations

• Strong correlation between SLP gradient and ice
  motion
• Peaks at 0 lag
• Stronger in winter
• Extends for 7 days
• Synoptic scale is key

BLACK all record BLUE winters (NDJFM) RED
summers (MJJAS)
4
Future Directions

• Synoptic scale vs. longer time scales
• Time filtering
• Spectral analysis
• Ice volume flux
• New ice age data (thickness proxy)
• Climate models
• Present day realizations
• Future climate scenarios

5
(No Transcript)
6
(No Transcript)