Transpolar Drift By: Danielle Holden. Background G Moves from Siberian Coast of Russia through Fram...
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Transcript of Transpolar Drift By: Danielle Holden. Background G Moves from Siberian Coast of Russia through Fram...
Background Background Moves from
Siberian Coast of Russia through Fram Strait and joins the Eastern Greenland Current
Moves at 1-3 cm/s Depth: 2000 m
Moves from Siberian Coast of Russia through Fram Strait and joins the Eastern Greenland Current
Moves at 1-3 cm/s Depth: 2000 m
Arctic Ocean circulation. Image courtesy of Arctic Monitoring and Assessment Programme (AMAP), Figure 3.29, AMAP (1998).
Ice/Fresh Water Circulation
Ice/Fresh Water Circulation
Beaufort Gyre and Transpolar Drift “exchange” ice between each other
The amount of fresh water transported depends on how much ice was melted in the Arctic 50-70% albedo in Arctic Sensible heat loss into air
and ocean Transpolar Drift collides
ice into Greenland coast: ridge formation and thick ice
Beaufort Gyre and Transpolar Drift “exchange” ice between each other
The amount of fresh water transported depends on how much ice was melted in the Arctic 50-70% albedo in Arctic Sensible heat loss into air
and ocean Transpolar Drift collides
ice into Greenland coast: ridge formation and thick ice
The amount of ice exportSource: Torben Königk et al: Fram Strait Ice Export: Variability and its Impact on Climate
Circulation and NAOCirculation and NAO
Positive and Negative Phases affect the Transpolar Drift differently: Positive phase: creates
westerlies in Arctic, colder air more sea ice, less ice and water transport
Negative phase: weak winds in Arctic, warmer air, less sea ice, more ice and water transport
Positive and Negative Phases affect the Transpolar Drift differently: Positive phase: creates
westerlies in Arctic, colder air more sea ice, less ice and water transport
Negative phase: weak winds in Arctic, warmer air, less sea ice, more ice and water transport
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Circulation and VorticityCirculation and Vorticity Decadal Oscillations
between (+) and (-) vorticities
Positive and Negative vorticities affect where the current travels. There are 2 paths. Positive Vorticity Phase:
Weak High Pressure in Arctic allows fresh water/sea ice to drift counterclockwise. (RED)
Negative Vorticity Phase: Strong High Pressure forces fresh water clockwise (BLUE)
Decadal Oscillations between (+) and (-) vorticities
Positive and Negative vorticities affect where the current travels. There are 2 paths. Positive Vorticity Phase:
Weak High Pressure in Arctic allows fresh water/sea ice to drift counterclockwise. (RED)
Negative Vorticity Phase: Strong High Pressure forces fresh water clockwise (BLUE)
Transpolar Drift Paths:Source: Mysak: Patterns of Arctic Circulation
ReferencesReferences http://www.giub.unibe.ch/klimet/wanner/nao.html http://nsidc.org/seaice/processes/circulation.html Knauss, John A. Introduction to Physical
Oceanography. Long Grove: Waveland Pr Inc, 2005.
Koenigk, T., J. Jungclaus, and U. Mikolajewicz. "Fram Strait Ice Export: Variability and its Impact on Climate." American Geohysical Union (2004).
Mysak, Lawrence A. "Patterns of Arctic Circulation." Science 293 (2001): 1269-270.
http://www.giub.unibe.ch/klimet/wanner/nao.html http://nsidc.org/seaice/processes/circulation.html Knauss, John A. Introduction to Physical
Oceanography. Long Grove: Waveland Pr Inc, 2005.
Koenigk, T., J. Jungclaus, and U. Mikolajewicz. "Fram Strait Ice Export: Variability and its Impact on Climate." American Geohysical Union (2004).
Mysak, Lawrence A. "Patterns of Arctic Circulation." Science 293 (2001): 1269-270.