1 | !********************************************************************** |
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2 | ! Copyright 2016 * |
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3 | ! Andreas Stohl, Massimo Cassiani, Petra Seibert, A. Frank, * |
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4 | ! Gerhard Wotawa, Caroline Forster, Sabine Eckhardt, John Burkhart, * |
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5 | ! Harald Sodemann, Ignacio Pisso * |
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6 | ! * |
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7 | ! This file is part of FLEXPART-NorESM * |
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8 | ! * |
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9 | ! FLEXPART-NorESM is free software: you can redistribute it * |
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10 | ! and/or modify * |
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11 | ! it under the terms of the GNU General Public License as published by* |
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12 | ! the Free Software Foundation, either version 3 of the License, or * |
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13 | ! (at your option) any later version. * |
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14 | ! * |
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15 | ! FLEXPART-NorESM is distributed in the hope that it will be useful, * |
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16 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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17 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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18 | ! GNU General Public License for more details. * |
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19 | ! * |
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20 | ! You should have received a copy of the GNU General Public License * |
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21 | ! along with FLEXPART-NorESM. * |
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22 | ! If not, see <http://www.gnu.org/licenses/>. * |
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23 | !********************************************************************** |
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24 | |
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25 | |
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26 | subroutine transform_omega_etadot(uuh,vvh,wwh,n) |
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27 | !i i i/o i |
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28 | |
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29 | !* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
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30 | !* * |
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31 | !* calculate eta_dot*dp_eta = wwh-dp_dt-u*dp_dx-v*dp_dy on costant eta levels * |
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32 | !* put eta_dot*dp_eta in wwh * |
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33 | !* here we use ps to obatin p, * |
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34 | !* other variables used and in common block are: * |
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35 | !* ps(ix,jy,1,n),akz(kz),bkz(kz),ps_tplus1_and_min1(ix,jy,indj-1 or indj+1) * |
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36 | !* if methodw is not 1 routne is not used * |
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37 | !* * |
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38 | !* * |
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39 | !* Author: * |
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40 | !* M. Cassiani 2016 * |
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41 | !* * |
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42 | !* * |
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43 | !* * |
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44 | !* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
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45 | |
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46 | use par_mod |
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47 | use com_mod |
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48 | |
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49 | implicit none |
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50 | |
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51 | integer :: ix,jy,kz,n,ixp,ixm,deltat |
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52 | real(kind=4) :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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53 | real(kind=4) :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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54 | real(kind=4) :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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55 | real(kind=4) :: pressure(0:nxmax-1,0:nymax-1,nwzmax) |
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56 | real(kind=4) :: dpressuredt(0:nxmax-1,0:nymax-1,nwzmax) |
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57 | real(kind=4) :: etadotdpdeta(0:nxmax-1,0:nymax-1,nwzmax) !not necessary but introduced for clarity eventually we coul rewrite wwh |
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58 | real(kind=4) :: oneoverdxinm(0:nymax-1) |
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59 | real(kind=4) :: oneoverdyinm,dpdx,dpdy |
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60 | |
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61 | |
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62 | |
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63 | do jy=1,ny-2 |
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64 | oneoverdxinm(jy)=dxconst/cos((real(jy)*dy+ylat0)*pi180) |
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65 | end do |
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66 | oneoverdyinm=dyconst |
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67 | |
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68 | |
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69 | |
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70 | do jy=0,nymin1 |
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71 | do ix=0, nxfield-1 |
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72 | do kz=2,nuvz !here nuvz is 27 (top of the domain) we skyp level one (extra kayer at the ground) |
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73 | pressure(ix,jy,kz)=akz(kz)+bkz(kz)*ps(ix,jy,1,n) |
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74 | dpressuredt(ix,jy,kz)=bkz(kz)*(ps_tplus1_and_min1(ix,jy,2)-ps_tplus1_and_min1(ix,jy,1)) !ps_tplus1_and_min1 is already divided for the time interval |
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75 | end do |
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76 | end do |
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77 | end do |
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78 | |
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79 | |
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80 | do jy=1,nymin1-1 !skip the poles |
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81 | do ix=0, nxfield-1 |
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82 | ixp=ix+1 |
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83 | ixm=ix-1 |
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84 | if (ixm.eq.-1) ixm=nxfield-1 !special treatment for 0 and nxfield-1, |
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85 | if (ixp.eq.nxfield) ixp=0 !special treatment for 0 and nxfield-1, |
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86 | do kz=2,nuvz !here nuvz is 27 (top of the domain) we skip level one (extra layer at the ground) |
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87 | dpdx=(pressure(ixp,jy,kz)-pressure(ixm,jy,kz))*oneoverdxinm(jy)*0.5 !ix increase eastward i.e. in the direction positive u (positive towards the east) |
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88 | dpdy=(pressure(ix,jy+1,kz)-pressure(ix,jy-1,kz))*oneoverdyinm*0.5 !jy incrrease northward i.e. in the direction positive v (positivwe towards the north) |
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89 | etadotdpdeta(ix,jy,kz)=wwh(ix,jy,kz)-dpressuredt(ix,jy,kz)-uuh(ix,jy,kz)*dpdx-vvh(ix,jy,kz)*dpdy |
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90 | ixp=ixp |
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91 | end do |
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92 | end do |
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93 | end do |
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94 | |
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95 | do jy=1,nymin1-1 !skip the poles |
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96 | do ix=0, nxfield-1 !special treatment for 0 and nxfield-1, |
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97 | do kz=2,nuvz !here nuvz is 27 (top of the domain) we skip level one (extra layer at the ground) |
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98 | wwh(ix,jy,kz)=etadotdpdeta(ix,jy,kz) |
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99 | end do |
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100 | end do |
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101 | end do |
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102 | |
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103 | wwh(:,0,:)=0. |
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104 | wwh(:,nymin1,:)=0. |
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105 | |
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106 | do ix=0, nxfield-1 ! |
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107 | do kz=2,nuvz !here nuvz is 27 (top of the domain) we skip level one (extra layer at the ground) |
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108 | wwh(ix,0,kz)=wwh(ix,0,kz)+etadotdpdeta(ix,1,kz)/nxfield !set to averaged value of next circle |
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109 | wwh(ix,nymin1,kz)= wwh(ix,nymin1,kz)+etadotdpdeta(ix,nymin1-1,kz)/nxfield !set to averaged value of previous circle |
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110 | end do |
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111 | end do |
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112 | |
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113 | |
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114 | |
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115 | return |
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116 | end |
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