1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
!**********************************************************************
! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 *
! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, *
! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann *
! *
! This file is part of FLEXPART. *
! *
! FLEXPART is free software: you can redistribute it and/or modify *
! it under the terms of the GNU General Public License as published by*
! the Free Software Foundation, either version 3 of the License, or *
! (at your option) any later version. *
! *
! FLEXPART is distributed in the hope that it will be useful, *
! but WITHOUT ANY WARRANTY; without even the implied warranty of *
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
! GNU General Public License for more details. *
! *
! You should have received a copy of the GNU General Public License *
! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. *
!**********************************************************************
subroutine initial_cond_calc(itime,i)
! i i
!*****************************************************************************
! *
! Calculation of the sensitivity to initial conditions for BW runs *
! *
! Author: A. Stohl *
! *
! 15 January 2010 *
! *
!*****************************************************************************
use unc_mod
use outg_mod
use par_mod
use com_mod
implicit none
integer :: itime,i,ix,jy,ixp,jyp,kz,ks
integer :: il,ind,indz,indzp,nrelpointer
real :: rddx,rddy,p1,p2,p3,p4,dz1,dz2,dz
real :: ddx,ddy
real :: rhoprof(2),rhoi,xl,yl,wx,wy,w
! For forward simulations, make a loop over the number of species;
! for backward simulations, make an additional loop over the release points
!**************************************************************************
if (itra1(i).ne.itime) return
! Depending on output option, calculate air density or set it to 1
! linit_cond: 1=mass unit, 2=mass mixing ratio unit
!*****************************************************************
if (linit_cond.eq.1) then ! mass unit
ix=int(xtra1(i))
jy=int(ytra1(i))
ixp=ix+1
jyp=jy+1
ddx=xtra1(i)-real(ix)
ddy=ytra1(i)-real(jy)
rddx=1.-ddx
rddy=1.-ddy
p1=rddx*rddy
p2=ddx*rddy
p3=rddx*ddy
p4=ddx*ddy
do il=2,nz
if (height(il).gt.ztra1(i)) then
indz=il-1
indzp=il
goto 6
endif
end do
6 continue
dz1=ztra1(i)-height(indz)
dz2=height(indzp)-ztra1(i)
dz=1./(dz1+dz2)
! Take density from 2nd wind field in memory (accurate enough, no time interpolation needed)
!*****************************************************************************
do ind=indz,indzp
rhoprof(ind-indz+1)=p1*rho(ix ,jy ,ind,2) &
+p2*rho(ixp,jy ,ind,2) &
+p3*rho(ix ,jyp,ind,2) &
+p4*rho(ixp,jyp,ind,2)
end do
rhoi=(dz1*rhoprof(2)+dz2*rhoprof(1))*dz
elseif (linit_cond.eq.2) then ! mass mixing ratio unit
rhoi=1.
endif
!****************************************************************************
! 1. Evaluate grid concentrations using a uniform kernel of bandwidths dx, dy
!****************************************************************************
! For backward simulations, look from which release point the particle comes from
! For domain-filling trajectory option, npoint contains a consecutive particle
! number, not the release point information. Therefore, nrelpointer is set to 1
! for the domain-filling option.
!*****************************************************************************
if ((ioutputforeachrelease.eq.0).or.(mdomainfill.eq.1)) then
nrelpointer=1
else
nrelpointer=npoint(i)
endif
do kz=1,numzgrid ! determine height of cell
if (outheight(kz).gt.ztra1(i)) goto 21
end do
21 continue
if (kz.le.numzgrid) then ! inside output domain
xl=(xtra1(i)*dx+xoutshift)/dxout
yl=(ytra1(i)*dy+youtshift)/dyout
ix=int(xl)
if (xl.lt.0.) ix=ix-1
jy=int(yl)
if (yl.lt.0.) jy=jy-1
! If a particle is close to the domain boundary, do not use the kernel either
!****************************************************************************
if ((xl.lt.0.5).or.(yl.lt.0.5).or. &
(xl.gt.real(numxgrid-1)-0.5).or. &
(yl.gt.real(numygrid-1)-0.5)) then ! no kernel, direct attribution to grid cell
if ((ix.ge.0).and.(jy.ge.0).and.(ix.le.numxgrid-1).and. &
(jy.le.numygrid-1)) then
do ks=1,nspec
init_cond(ix,jy,kz,ks,nrelpointer)= &
init_cond(ix,jy,kz,ks,nrelpointer)+ &
xmass1(i,ks)/rhoi
end do
endif
else ! attribution via uniform kernel
ddx=xl-real(ix) ! distance to left cell border
ddy=yl-real(jy) ! distance to lower cell border
if (ddx.gt.0.5) then
ixp=ix+1
wx=1.5-ddx
else
ixp=ix-1
wx=0.5+ddx
endif
if (ddy.gt.0.5) then
jyp=jy+1
wy=1.5-ddy
else
jyp=jy-1
wy=0.5+ddy
endif
! Determine mass fractions for four grid points
!**********************************************
if ((ix.ge.0).and.(ix.le.numxgrid-1)) then
if ((jy.ge.0).and.(jy.le.numygrid-1)) then
w=wx*wy
do ks=1,nspec
init_cond(ix,jy,kz,ks,nrelpointer)= &
init_cond(ix,jy,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w
end do
endif
if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then
w=wx*(1.-wy)
do ks=1,nspec
init_cond(ix,jyp,kz,ks,nrelpointer)= &
init_cond(ix,jyp,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w
end do
endif
endif
if ((ixp.ge.0).and.(ixp.le.numxgrid-1)) then
if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then
w=(1.-wx)*(1.-wy)
do ks=1,nspec
init_cond(ixp,jyp,kz,ks,nrelpointer)= &
init_cond(ixp,jyp,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w
end do
endif
if ((jy.ge.0).and.(jy.le.numygrid-1)) then
w=(1.-wx)*wy
do ks=1,nspec
init_cond(ixp,jy,kz,ks,nrelpointer)= &
init_cond(ixp,jy,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w
end do
endif
endif
endif
endif
end subroutine initial_cond_calc
|
