|
Last change
on this file since 3504 was
3184,
checked in by afalco, 10 months ago
|
|
Pluto PCM:
Added LMDZ.PLUTO, a copy of the generic model,
cleaned from some unnecessary modules (water, ...)
AF
|
|
File size:
1.6 KB
|
| Line | |
|---|
| 1 | subroutine albedo_snow_calc(lambda,albedo,A_sw) |
|---|
| 2 | |
|---|
| 3 | real lambda_sw |
|---|
| 4 | real lambda_lw |
|---|
| 5 | real A_sw |
|---|
| 6 | real A_lw |
|---|
| 7 | real albedo |
|---|
| 8 | real lambda |
|---|
| 9 | |
|---|
| 10 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
|---|
| 11 | !!!!! Routine written by Martin TURBET (July 2015) |
|---|
| 12 | !!!!! |
|---|
| 13 | !!!!! Albedo expression derived from Yoshi et al. and Warren et al. articles. |
|---|
| 14 | !!!!! |
|---|
| 15 | !! |
|---|
| 16 | !! Short Wave Snow Albedo 'A_sw' (at 0.5 microns) must be chosen in callphys.def file. |
|---|
| 17 | !! |
|---|
| 18 | !!!!! |
|---|
| 19 | !!!!! |
|---|
| 20 | !! Some Calibration Informations : |
|---|
| 21 | !!!!! |
|---|
| 22 | !!!!! |
|---|
| 23 | !! |
|---|
| 24 | !! 1. For Pure Snow, A_sw (at 0.5 microns) should be equal to ~0.95 |
|---|
| 25 | !! -> This gives an equivalent integrated snow albedo of ~0.73 for the Sun. |
|---|
| 26 | !! |
|---|
| 27 | !! 2. For Dusty Snow, A_sw (at 0.5 microns) should be equal to ~0.50. |
|---|
| 28 | !! -> This gives an equivalent integrated snow albedo of ~0.39 for the Sun. |
|---|
| 29 | !! |
|---|
| 30 | !! 3. For 'Realistic' Snow, A_sw (at 0.5 microns) should be equal to ~0.645. |
|---|
| 31 | !! -> This gives an equivalent integrated snow albedo of ~0.50 for the Sun. |
|---|
| 32 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
|---|
| 33 | |
|---|
| 34 | A_lw=5.0D-2 |
|---|
| 35 | lambda_sw=9.0D-1 |
|---|
| 36 | lambda_lw=1.4 |
|---|
| 37 | |
|---|
| 38 | if (lambda .le. lambda_sw) then |
|---|
| 39 | albedo=A_sw |
|---|
| 40 | else if (lambda .ge. lambda_lw) then |
|---|
| 41 | albedo=A_lw |
|---|
| 42 | else if ( (lambda .gt. lambda_sw) .and. & |
|---|
| 43 | (lambda .lt. lambda_lw) ) then |
|---|
| 44 | albedo=A_sw-(lambda-lambda_sw)*(A_sw-A_lw) & |
|---|
| 45 | /(lambda_lw-lambda_sw) |
|---|
| 46 | end if |
|---|
| 47 | |
|---|
| 48 | return |
|---|
| 49 | end |
|---|
Note: See
TracBrowser
for help on using the repository browser.
