Comparison Of Atmospheric Forcing In The Four Sub-arctic Seas€¦ · especially between winter and...
Transcript of Comparison Of Atmospheric Forcing In The Four Sub-arctic Seas€¦ · especially between winter and...
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Comparison Of Atmospheric Forcing In The Four Sub-arctic Seas
Muyin Wang1
James Overland2 and Nicholas Bond1
1 JISAO/PMEL, UW; 2 PMEL/NOAASeattle WA
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Variables From NCEP/NCAR Reanalysis
There are no observations directly affecting the variable, so it is derived solely from the model fields.
C
Although there observational data that directly affect the value of the variable, the model also has a very strong influence on the analysis value.
B
The variable is strongly influenced by observed data. It is the most reliable class.
A
(m/s)3Surface Wind MixingW/m2CNet L/S Wave Radiation FluxW/m2CLatent/ Sensible Heat Fluxm/sBWind (u,v) at 10mKg/KgBSpecific HumidityKBAir Temp at 2mhPaASea Level Pressure
UnitsClassVariable Name
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Seasonal SLP and 10m-Wind
Jan
Apr
Aug
Oct
N. Pacific N. Atlantic
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SLP Trend (1950-2004) hPa/dec
Bering -1.0Okhotsk -0.1Barents -0.8Labrador -0.6
Seasonal SLP at Selected Stations
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Seasonal Averaged Surface Wind Vector (at 10m)
Winter
Spring
Summer
Fall
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Winter
Spring
Summer
Autumn
Okhotsk Bering Labrador Barents
Climatology of Surface Air Temperature
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Monthly Surface Air Temperature (2m) Anomalies
Bering
Okhotsk
Barents
Labrador
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Bering
Bering
Bering
Bering
Okhotsk
Okhotsk
Okhotsk
Okhotsk
BarentsBarents
BarentsBarents
Labrador
Labrador
Labrador
Labrador
Winter
Spring
Summer
Autumn
Seasonal Mean Surface Air Temperature
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Climatology of Latent Heat Flux
Winter
Spring
Summer
Autumn
Okhotsk Bering Labrador Barents
W/m2
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Climatology of Sensible Heat Flux
Okhotsk Bering Labrador Barents
Winter
Spring
Summer
Autumn
W/m2
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Net Short Wave Radiation Flux (downward)
Okhotsk Bering Labrador Barents
Winter
Spring
Summer
Autumn
W/m2
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Seasonal Mean Net Long-Wave Radiation Flux (upward)
Okhotsk Bering Labrador Barents
Winter
Spring
Summer
Autumn
W/m2
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WINTERW
/m2
W/m
2
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SPRING
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Climatology of WIND MIXING
Okhotsk Bering Labrador Barents
Winter
Spring
Summer
Autumn
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SUMMARY
• No trend in the seasonal SLP (except winter) at all 4 sub-Arctic Seas. Downward trend in winter SLP at Bering, Labrador, and Barents seas ( except Sea of Okhotsk).
• Prominent interannual variability of the winds in Spring and Fall.
• Similar seasonal cycle of individual components of surface heat flux
• The decadal variations of Tair are similar among the seasons, especially between winter and spring. The interannual variations in winter tend to be anti-correlated between Labrador and Barents, and between Okhotsk and Bering.
• There is little coherence in the fluctuations between the Pacific (Bering) and Atlantic (Barents, Labrador) sector in the winter downward SLP trend.
• Winter wind variability is more pronounced in the Bering and Barents than in Okhotsk and Labrador.
• The Labrador Sea displays greater mean and variability in latent and sensible heat fluxes in winter.
• The decadal variations in summer and fall Tair are much different from winter and spring at Sea of Okhotsk. The anti-correlation of Tair is stronger in N. Atlantic sector than in N. Pacific sector.
Similarities Differences
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Larval Survival vs. Wind Mixing
Gulf of Alaska Walleye Pollock Recruitment
http://www.pmel.noaa.gov/~miletta/web/foci_p2.html
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Seasonal Mean Specific Humidity
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Bering
Bering
Bering
Bering
Okhotsk
Okhotsk
Okhotsk
Okhotsk
Barents
Barents
Barents
Barents
Labrador
Labrador
Labrador
Labrador
Standard DeviationsWinter Spring Summer Autumn
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Standard Deviations
Bering
Bering
Bering
Bering
Okhotsk
Okhotsk
Okhotsk
Okhotsk
Barents
Barents
Barents
Barents
Labrador
Labrador
Labrador
Labrador
Winter Summer AutumnSpring