Last change
on this file since 20 was
19,
checked in by ymipsl, 12 years ago
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Simplify the management of the module.
YM
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File size:
1.3 KB
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1 | MODULE disvert_ncar_mod |
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2 | USE icosa |
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3 | |
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4 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: ap(:) |
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5 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: bp(:) |
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6 | REAL(rstd), SAVE, ALLOCATABLE,TARGET :: presnivs(:) |
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7 | |
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8 | CONTAINS |
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9 | !========================================================================= |
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10 | |
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11 | SUBROUTINE init_disvert |
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12 | USE icosa |
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13 | IMPLICIT NONE |
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14 | |
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15 | ALLOCATE(ap(llm+1)) |
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16 | ALLOCATE(bp(llm+1)) |
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17 | ALLOCATE(presnivs(llm)) |
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18 | |
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19 | CALL disvert(ap,bp,presnivs) |
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20 | |
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21 | END SUBROUTINE init_disvert |
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22 | |
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23 | |
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24 | SUBROUTINE disvert(ap,bp,presnivs) |
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25 | USE icosa |
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26 | IMPLICIT NONE |
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27 | REAL(rstd),INTENT(OUT) :: ap(:) |
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28 | REAL(rstd),INTENT(OUT) :: bp(:) |
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29 | REAL(rstd),INTENT(OUT) :: presnivs(:) |
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30 | |
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31 | REAL(rstd) :: sig(llm+1) |
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32 | REAL(rstd) :: sigtop |
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33 | REAL(rstd),PARAMETER:: p0=100000.0 |
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34 | INTEGER :: l,cindx |
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35 | REAL(rstd) :: hdz, ehdz |
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36 | |
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37 | |
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38 | hdz = 400.*g/(300.*287.) |
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39 | ehdz = exp(-hdz) |
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40 | |
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41 | do l = 1,llm+1 |
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42 | sig(l) = ehdz**(l-1) |
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43 | end do |
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44 | |
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45 | sigtop = sig(llm+1) |
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46 | cindx = 1 |
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47 | |
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48 | bp(llm+1) = 0. |
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49 | DO l = 1, llm |
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50 | bp(l) = (sig(l) - sigtop)/(1 - sigtop) |
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51 | bp(l) = bp(l)**cindx |
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52 | ap(l) = p0 * ( sig(l) - bp(l) ) |
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53 | ENDDO |
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54 | bp(1)=1. |
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55 | ap(1)=0. |
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56 | ap(llm+1) = p0 * ( sig(llm+1) - bp(llm+1) ) |
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57 | |
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58 | DO l = 1, llm |
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59 | presnivs(l) = 0.5 *( ap(l)+bp(l)*p0 + ap(l+1)+bp(l+1)*p0 ) |
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60 | ENDDO |
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61 | |
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62 | END SUBROUTINE disvert |
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63 | |
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64 | END MODULE disvert_ncar_mod |
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