Difference between revisions of "Jwtype"
From WikiROMS
Jump to navigationJump to search| Line 5: | Line 5: | ||
WTYPE values 1 through 5 correspond to Jerlov's classification of water types I, IA, IB, II and III, respectively. | WTYPE values 1 through 5 correspond to Jerlov's classification of water types I, IA, IB, II and III, respectively. | ||
The model for | The model for the downward flux of solar radiation is: | ||
<math>Q_{down}(z) = Q_{sw}( r \mbox{ } \exp(z/\mu_1) + (1-r) \mbox{ } \exp(z/\mu_2) ) </math> | <math>Q_{down}(z) = Q_{sw}( r \mbox{ } \exp(z/\mu_1) + (1-r) \mbox{ } \exp(z/\mu_2) ) </math> | ||
where ''Q_sw'' is the downward shortwave radiation at the sea surface. This parameterization is implemented in [[lmd_swfrac.F]] if called for. Downward shortwave data (or an analytical value) is required as input. | |||
The parameters of this simple optical model are described and set in [[mod_scalars.F]]: | The parameters of this simple optical model are described and set in [[mod_scalars.F]]: | ||
Revision as of 17:49, 10 May 2007
WTYPE
This parameter selects amongst a set of coefficients that define the double exponential profile for shortwave radiation absorption calculated by Paulson and Simpson's fit to the data of Jerlov (1976)
WTYPE values 1 through 5 correspond to Jerlov's classification of water types I, IA, IB, II and III, respectively.
The model for the downward flux of solar radiation is:
where Q_sw is the downward shortwave radiation at the sea surface. This parameterization is implemented in lmd_swfrac.F if called for. Downward shortwave data (or an analytical value) is required as input.
The parameters of this simple optical model are described and set in mod_scalars.F:
lmd_mu1 Reciprocal of the absorption coefficient for solar
wavelength band 1 as a function of the Jerlov
water type. Units are meters.
lmd_mu2 Reciprocal of the absorption coefficient for solar
wavelength band 2 as a function of the Jerlov
water type. Units are meters.
lmd_r1 Fraction of total radiance for wavelength band 1 as
a function of the Jerlov water type.
The values are:
Jerlov water type : I IA IB II III
WTYPE 1 2 3 4 5
lmd_mu1 0.35 , 0.6 , 1.0 , 1.5 , 1.4
lmd_mu2 23.0 , 20.0 , 17.0 , 14.0 , 7.9
lmd_r1 0.58 , 0.62 , 0.67 , 0.77 , 0.78
