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Forcing Data - Notation

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Description Notation Value Units Comment
Air density 1.3 kg m-3  
Snow density 300.0 kg m-3  
Ice density 900.0 kg m-3  
Ocean density 1025.0 kg m-3  
Coriolis parameter f   s-1 Function of latitude only
Sea level air pressure pa   Pa
Geostrophic wind   m s-1
Surface wind   m s-1
Sea-ice velocity   m s-1
Ocean surface velocity   m s-1
Surface stress air-ocean   Pa  
Drag coefficient air-ocean Dao (1.10 + 0.04 Ws) x  10-3   Dependent on surface wind speed
Surface stress air-ice   Pa  
Drag coefficient air-ice Dai (1.10 + 0.04 Ws) x  10-3   Dependent on surface wind speed
Surface stress ice-ocean   Pa  
Drag coefficient ice-ocean Dio 5.50 x 10-3    
Air temperature Ta   °C
Surface temperature ice (snow) Tis   °C
Melting point ice (snow) surface Tmis 0.0 °C
Surface temperature ocean Tos   °C
Freezing point temperature ocean surface Tfos   °C
Surface salinity ocean Sos   psu
Ice salinity Si 4 psu
Surface salinity restoring time 180 days
Coefficient of salinity-dependent freezing point mf -0.0575 °C/psu  
Relative humidity rh 0.9   Regional models only
Vapor pressure in air ea   Pa
Saturation vapor pressure over ocean surface eos   Pa
Saturation vapor pressure over ice (snow) surface eis   Pa
Specific humidity in air qa   kg kg-1
Specific humidity at ocean surface qos   kg kg-1
Specific humidity at ice (snow) surface qis   kg kg-1
Evaporation over ocean surface Eos   m s-1 Evaluated at ocean equivalent density
Sublimation over ice (snow) surface Eis   m s-1 Evaluated at ocean equivalent density
Precipitation P   m s-1 Evaluated at ocean equivalent density
Cloud cover fraction cf [0..1]    
Steffan-Boltzmann constant 5.67 x 10-8 W m-2 K-4
Specific heat of air cpa 1004 J kg-1 K-1
Specific heat of ice (snow) cpi 2090 J kg-1 K-1
Specific heat of ocean cpo 4190 J kg-1 K-1
Latent heat of fusion Lf 0.334 x 106 J kg-1
Latent heat of vaporization Lv 2.501 x 106 J kg-1
Latent heat of sublimation Ls 2.835 x 106 J kg-1
Exchange coefficient of sensible heat Csh 1.20 x 10-3  
Exchange coefficient of latent heat Clh 1.50 x 10-3  
Albedo of ice 0.60    
Albedo of melting ice 0.50    
Albedo of snow 0.80    
Albedo of melting snow 0.70    
Albedo of ocean 0.10    
Emissivity of snow 0.99    
Emissivity of ice 0.97    
Emissivity of ocean 0.97    
Solar constant 1353 W m-2  
Sensible heat flux   W m-2
Latent heat flux   W m-2
Shortwave radiation   W m-2
Longwave radiation   W m-2
Day of Year     [1..365]
Hour of Day     [0..23]
Solar Zenith Angle    
Hour Angle    

Last updated: March 5, 2010

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