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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
!**********************************************************************
! 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 outgrid_init_nest
!*****************************************************************************
! *
! This routine calculates, for each grid cell of the output nest, the *
! volume and the surface area. *
! *
! Author: A. Stohl *
! *
! 30 August 2004 *
! *
!*****************************************************************************
! *
! Variables: *
! *
! arean surface area of all output nest cells *
! volumen volumes of all output nest cells *
! *
!*****************************************************************************
use unc_mod
use outg_mod
use par_mod
use com_mod
implicit none
integer :: ix,jy,kz,ks,kp,nage,l,iix,jjy,ixp,jyp,i1,j1,j,ngrid
integer :: stat
real :: ylat,gridarea,ylatp,ylatm,hzone,cosfactm,cosfactp
real :: xlon,xl,yl,ddx,ddy,rddx,rddy,p1,p2,p3,p4,xtn,ytn,oroh
real,parameter :: eps=nxmax/3.e5
! gridunc,griduncn uncertainty of outputted concentrations
allocate(griduncn(0:numxgridn-1,0:numygridn-1,numzgrid,maxspec, &
maxpointspec_act,nclassunc,maxageclass),stat=stat)
if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc'
if (ldirect.gt.0) then
allocate(wetgriduncn(0:numxgridn-1,0:numygridn-1,maxspec, &
maxpointspec_act,nclassunc,maxageclass),stat=stat)
if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc'
allocate(drygriduncn(0:numxgridn-1,0:numygridn-1,maxspec, &
maxpointspec_act,nclassunc,maxageclass),stat=stat)
if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc'
endif
! Compute surface area and volume of each grid cell: area, volume;
! and the areas of the northward and eastward facing walls: areaeast, areanorth
!***********************************************************************
do jy=0,numygridn-1
ylat=outlat0n+(real(jy)+0.5)*dyoutn
ylatp=ylat+0.5*dyoutn
ylatm=ylat-0.5*dyoutn
if ((ylatm.lt.0).and.(ylatp.gt.0.)) then
hzone=dyoutn*r_earth*pi180
else
! Calculate area of grid cell with formula M=2*pi*R*h*dx/360,
! see Netz, Formeln der Mathematik, 5. Auflage (1983), p.90
!************************************************************
cosfactp=cos(ylatp*pi180)
cosfactm=cos(ylatm*pi180)
if (cosfactp.lt.cosfactm) then
hzone=sqrt(1-cosfactp**2)- &
sqrt(1-cosfactm**2)
hzone=hzone*r_earth
else
hzone=sqrt(1-cosfactm**2)- &
sqrt(1-cosfactp**2)
hzone=hzone*r_earth
endif
endif
! Surface are of a grid cell at a latitude ylat
!**********************************************
gridarea=2.*pi*r_earth*hzone*dxoutn/360.
do ix=0,numxgridn-1
arean(ix,jy)=gridarea
! Volume = area x box height
!***************************
volumen(ix,jy,1)=arean(ix,jy)*outheight(1)
do kz=2,numzgrid
volumen(ix,jy,kz)=arean(ix,jy)*(outheight(kz)-outheight(kz-1))
end do
end do
end do
!**************************************************************************
! Determine average height of model topography in nesteed output grid cells
!**************************************************************************
! Loop over all output grid cells
!********************************
do jjy=0,numygridn-1
do iix=0,numxgridn-1
oroh=0.
! Take 100 samples of the topography in every grid cell
!******************************************************
do j1=1,10
ylat=outlat0n+(real(jjy)+real(j1)/10.-0.05)*dyoutn
yl=(ylat-ylat0)/dy
do i1=1,10
xlon=outlon0n+(real(iix)+real(i1)/10.-0.05)*dxoutn
xl=(xlon-xlon0)/dx
! Determine the nest we are in
!*****************************
ngrid=0
do j=numbnests,1,-1
if ((xl.gt.xln(j)+eps).and.(xl.lt.xrn(j)-eps).and. &
(yl.gt.yln(j)+eps).and.(yl.lt.yrn(j)-eps)) then
ngrid=j
goto 43
endif
end do
43 continue
! Determine (nested) grid coordinates and auxiliary parameters used for interpolation
!*****************************************************************************
if (ngrid.gt.0) then
xtn=(xl-xln(ngrid))*xresoln(ngrid)
ytn=(yl-yln(ngrid))*yresoln(ngrid)
ix=int(xtn)
jy=int(ytn)
ddy=ytn-real(jy)
ddx=xtn-real(ix)
else
ix=int(xl)
jy=int(yl)
ddy=yl-real(jy)
ddx=xl-real(ix)
endif
ixp=ix+1
jyp=jy+1
rddx=1.-ddx
rddy=1.-ddy
p1=rddx*rddy
p2=ddx*rddy
p3=rddx*ddy
p4=ddx*ddy
if (ngrid.gt.0) then
oroh=oroh+p1*oron(ix ,jy ,ngrid) &
+ p2*oron(ixp,jy ,ngrid) &
+ p3*oron(ix ,jyp,ngrid) &
+ p4*oron(ixp,jyp,ngrid)
else
oroh=oroh+p1*oro(ix ,jy) &
+ p2*oro(ixp,jy) &
+ p3*oro(ix ,jyp) &
+ p4*oro(ixp,jyp)
endif
end do
end do
! Divide by the number of samples taken
!**************************************
orooutn(iix,jjy)=oroh/100.
end do
end do
!*******************************
! Initialization of output grids
!*******************************
do kp=1,maxpointspec_act
do ks=1,nspec
do nage=1,nageclass
do jy=0,numygridn-1
do ix=0,numxgridn-1
do l=1,nclassunc
! Deposition fields
if (ldirect.gt.0) then
wetgriduncn(ix,jy,ks,kp,l,nage)=0.
drygriduncn(ix,jy,ks,kp,l,nage)=0.
endif
! Concentration fields
do kz=1,numzgrid
griduncn(ix,jy,kz,ks,kp,l,nage)=0.
end do
end do
end do
end do
end do
end do
end do
end subroutine outgrid_init_nest
|
