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Last change
on this file since 3957 was
3844,
checked in by tbertrand, 5 months ago
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|
Pluto PCM
CO cycle now possible with the option no_n2frost (CO condensation and sublimation is limited to within the N2 ice deposits only).
NLTE factor 0.33 on the cooling rates now removed in callcorrk.
TB
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File size:
874 bytes
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| Line | |
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| 1 | subroutine cosat(nsize,t,p,qsat,qsurf_n2) |
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| 2 | |
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| 3 | IMPLICIT NONE |
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| 4 | |
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| 5 | !======================================================================= |
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| 6 | ! |
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| 7 | ! CO mass mixing ratio at saturation (kg/kg) for a given pressure (Pa) |
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| 8 | ! and Temperature (K) array |
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| 9 | ! |
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| 10 | !======================================================================= |
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| 11 | |
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| 12 | |
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| 13 | ! INPUT |
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| 14 | integer nsize |
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| 15 | real t(nsize) , p(nsize) |
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| 16 | ! OUTPUT |
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| 17 | real qsat(nsize),qsurf_n2(nsize) |
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| 18 | INTEGER i |
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| 19 | |
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| 20 | |
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| 21 | do i=1,nsize |
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| 22 | |
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| 23 | ! from Fray and schmitt fit by formulation L = 2.74e5 J/kg |
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| 24 | qsat(i)=0.1537*exp((28*274./8.314)*(1/68.1-1/t(i)))*100000*28.0/(28.0*p(i)) |
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| 25 | |
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| 26 | ! Raoult law if mixte in N2 ice : assume 0.3% CO in N2 |
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| 27 | if ((qsurf_n2(i).gt.0.001)) then |
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| 28 | qsat(i)=qsat(i)*0.3/100. |
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| 29 | endif |
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| 30 | |
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| 31 | ! security : |
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| 32 | qsat(i)=min(qsat(i),0.99) |
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| 33 | enddo |
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| 34 | |
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| 35 | return |
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| 36 | end subroutine cosat |
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| 37 | |
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