1. Changing Arctic Ocean freshwater pathways
어청일1 김관우 2 이종진 3 김민지 4
, , ,
Changing Arctic Ocean freshwater pathways
Terminology
A O (Arctic Oscilliation)
SLP (Sea Level Pressure)
DOT (Deviation Of The Sea Surface From The Geoid)
SPA (Steric Pressure Anomaly)
OBP (Ocean Bottom Pressure) = > SPA + DOT

2. Beaufort High ↓
2005 ~ 2008
Canada basin
Beaufort High ↑
Canada basin

3. H ?
Beaufort High AO
<
Beaufort High AO

4. Characterized by High AO Index In Arctic Ocean

5. 1. Characterized by High AO Index In Arctic Ocean
SPA ↓
Figure 2. b Rates of change between 2005 and 2008 of DOT, SPA and
freshwater content.
Figure Arctic Ocean salinity anomaly and geostrophic velocity at
50–60m depth.
Canada
basin
Makarov
basin
Eurasian basin
Chukchi
borderland

6. DOT ↑ 2005 ~ 2008 Canada basin Canada basin Russian shelf break
2. Characterized by High AO Index In Arctic Ocean
SLP → DOT ↓
Convergence
Divergence
Secondary Flow
to upper halocline
Figure 4. b Schematic views of the idealized Arctic Ocean circulation patterns under low and high AO anomalies.
2. Characterized by High AO Index In Arctic Ocean
DOT ↑
Russian shelf break
2. Characterized by High AO Index In Arctic Ocean
Beaufort High ↓
2005 ~ 2008
Canada basin
Beaufort High ↑
Canada basin

7. Tendency of each AO pattern
Conclusion
Figure S13. e,f February-March ICESat DOT and resulting upper-ocean geostrophic velocities for (e) and (f)
Figure S2. a,b Mean and first EOF (the Arctic Oscillation) patterns of sea level pressure in 667 the Arctic.

8. Fresh water Pathway, Trans-Polar Drift High AO ↓ Increase
Conclusion
Fresh water Pathway, Trans-Polar Drift
High AO ↓
Increase
warm & salty N.Atlantic water
(Increase
Outflow in Labrador Sea)
↓ ↘
Deep thermohaline convection↑
Weakening the cold halocline layer
Sea Ice Melt ↑

9. Discussion

10. Themohaline Circulation
Discussion
All of Arctic Sea Ice melt ↓
Maybe
Themohaline convection is off
N.Atlantic water
Cannot move north
Themohaline Circulation
Switch
Turn On / Off
Controled by AO Index
Income More
warm & salty N.Atlantic water ↓
Make More
Deep thermohaline convection↑
Positive Feedback
Warm Phase
Cold Phase
Regime Shift
Boiler is out of order