-
Notifications
You must be signed in to change notification settings - Fork 0
/
interpol_rain_nests.f90
263 lines (223 loc) · 10.9 KB
/
interpol_rain_nests.f90
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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
!***********************************************************************
!* Copyright 2012,2013 *
!* Jerome Brioude, Delia Arnold, Andreas Stohl, Wayne Angevine, *
!* John Burkhart, Massimo Cassiani, Adam Dingwell, Richard C Easter, Sabine Eckhardt,*
!* Stephanie Evan, Jerome D Fast, Don Morton, Ignacio Pisso, *
!* Petra Seibert, Gerard Wotawa, Caroline Forster, Harald Sodemann, *
!* *
!* This file is part of FLEXPART WRF *
!* *
!* 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 interpol_rain_nests(yy1,yy2,yy3,iy1,iy2,nxmaxn,nymaxn,nzmax, &
maxnests,ngrid,nxn,nyn,memind,xt,yt,level,itime1,itime2,itime, &
yint1,yint2,yint3,intiy1,intiy2,icmv)
! i i i i i i
! i i i i i i i i i i i
! o o o
!****************************************************************************
! *
! Interpolation of meteorological fields on 2-d model layers for nested *
! grids. This routine is related to levlin3interpol.f for the mother domain*
! *
! In horizontal direction bilinear interpolation interpolation is used. *
! Temporally a linear interpolation is used. *
! Three fields are interpolated at the same time. *
! *
! This is a special version of levlininterpol to save CPU time. *
! *
! 1 first time *
! 2 second time *
! *
! *
! Author: A. Stohl *
! *
! 15 March 2000 *
! *
!****************************************************************************
! *
! Variables: *
! *
! dt1,dt2 time differences between fields and current position *
! dz1,dz2 z distance between levels and current position *
! height(nzmax) heights of the model levels *
! indexh help variable *
! indz the level closest to the current trajectory position *
! indzh help variable *
! itime current time *
! itime1 time of the first wind field *
! itime2 time of the second wind field *
! ix,jy x,y coordinates of lower left subgrid point *
! level level at which interpolation shall be done *
! memind(3) points to the places of the wind fields *
! nx,ny actual field dimensions in x,y and z direction *
! nxmax,nymax,nzmax maximum field dimensions in x,y and z direction *
! xt current x coordinate *
! yint the final interpolated value *
! yt current y coordinate *
! yy(0:nxmax,0:nymax,nzmax,3) meteorological field used for interpolation *
! zt current z coordinate *
! *
! Changed 10/22/2007 yy1,yy2 are accumulated rain (mm)
! convert them into hourly rain (mm/hr)
!****************************************************************************
implicit none
integer :: maxnests,ngrid
integer :: nxn(maxnests),nyn(maxnests),nxmaxn,nymaxn,nzmax,memind(2)
integer :: m,ix,jy,ixp,jyp,itime,itime1,itime2,level,indexh,i1,i2
integer :: ip1,ip2,ip3,ip4
integer :: intiy1,intiy2,ipsum,icmv
real :: yy1(0:nxmaxn-1,0:nymaxn-1,nzmax,2,maxnests)
real :: yy2(0:nxmaxn-1,0:nymaxn-1,nzmax,2,maxnests)
real :: yy3(0:nxmaxn-1,0:nymaxn-1,nzmax,2,maxnests)
integer :: iy1(0:nxmaxn-1,0:nymaxn-1,2,maxnests)
integer :: iy2(0:nxmaxn-1,0:nymaxn-1,2,maxnests)
real :: ddx,ddy,rddx,rddy,dt1,dt2,dt,y1(2),y2(2),y3(2),yi1(2),yi2(2)
real :: xt,yt,yint1,yint2,yint3,yint4,p1,p2,p3,p4
! If point at border of grid -> small displacement into grid
!***********************************************************
if (xt.ge.real(nxn(ngrid)-1)) xt=real(nxn(ngrid)-1)-0.00001
if (yt.ge.real(nyn(ngrid)-1)) yt=real(nyn(ngrid)-1)-0.00001
!**********************************************************************
! 1.) Bilinear horizontal interpolation
! This has to be done separately for 2 fields (Temporal)
!*******************************************************
! Determine the lower left corner and its distance to the current position
!*************************************************************************
ix=int(xt)
jy=int(yt)
ixp=ix+1
jyp=jy+1
ddx=xt-real(ix)
ddy=yt-real(jy)
rddx=1.-ddx
rddy=1.-ddy
p1=rddx*rddy
p2=ddx*rddy
p3=rddx*ddy
p4=ddx*ddy
! Loop over 2 time steps
!***********************
! y1 and y2 are accumulated rain, need change to hourly rain
i1=memind(1)
i2=memind(2)
! time interval between two fields, second to hour
dt=real(itime2-itime1)/3600.0
yint1=p1*(yy1(ix ,jy ,level,i2,ngrid)- &
yy1(ix ,jy ,level,i1,ngrid)) &
+ p2*(yy1(ixp,jy ,level,i2,ngrid)- &
yy1(ixp,jy ,level,i1,ngrid)) &
+ p3*(yy1(ix ,jyp,level,i2,ngrid)- &
yy1(ix ,jyp,level,i1,ngrid)) &
+ p4*(yy1(ixp,jyp,level,i2,ngrid)- &
yy1(ixp,jyp,level,i1,ngrid))
yint1=yint1/dt
yint2=p1*(yy2(ix ,jy ,level,i2,ngrid)- &
yy2(ix ,jy ,level,i1,ngrid)) &
+ p2*(yy2(ixp,jy ,level,i2,ngrid)- &
yy2(ixp,jy ,level,i1,ngrid)) &
+ p3*(yy2(ix ,jyp,level,i2,ngrid)- &
yy2(ix ,jyp,level,i1,ngrid)) &
+ p4*(yy2(ixp,jyp,level,i2,ngrid)- &
yy2(ixp,jyp,level,i1,ngrid))
yint2=yint2/dt
! Y3 is cloud fraction in an hour
do m=1,2
indexh=memind(m)
y3(m)=p1*yy3(ix ,jy ,level,indexh,ngrid) &
+ p2*yy3(ixp,jy ,level,indexh,ngrid) &
+ p3*yy3(ix ,jyp,level,indexh,ngrid) &
+ p4*yy3(ixp,jyp,level,indexh,ngrid)
enddo
! CDA new clouds
do m=1,2
indexh=memind(m)
ip1=1
ip2=1
ip3=1
ip4=1
if (iy1(ix ,jy ,indexh,ngrid) .eq. icmv) ip1=0
if (iy1(ixp,jy ,indexh,ngrid) .eq. icmv) ip2=0
if (iy1(ix ,jyp,indexh,ngrid) .eq. icmv) ip3=0
if (iy1(ixp,jyp,indexh,ngrid) .eq. icmv) ip4=0
ipsum= ip1+ip2+ip3+ip4
if (ipsum .eq. 0) then
yi1(m)=icmv
else
yi1(m)=(ip1*p1*iy1(ix ,jy ,indexh,ngrid) &
+ ip2*p2*iy1(ixp,jy ,indexh,ngrid) &
+ ip3*p3*iy1(ix ,jyp,indexh,ngrid) &
+ ip4*p4*iy1(ixp,jyp,indexh,ngrid))/ipsum
endif
ip1=1
ip2=1
ip3=1
ip4=1
if (iy2(ix ,jy ,indexh,ngrid) .eq. icmv) ip1=0
if (iy2(ixp,jy ,indexh,ngrid) .eq. icmv) ip2=0
if (iy2(ix ,jyp,indexh,ngrid) .eq. icmv) ip3=0
if (iy2(ixp,jyp,indexh,ngrid) .eq. icmv) ip4=0
ipsum= ip1+ip2+ip3+ip4
if (ipsum .eq. 0) then
yi2(m)=icmv
else
yi2(m)=(ip1*p1*iy2(ix ,jy ,indexh,ngrid) &
+ ip2*p2*iy2(ixp,jy ,indexh,ngrid) &
+ ip3*p3*iy2(ix ,jyp,indexh,ngrid) &
+ ip4*p4*iy2(ixp,jyp,indexh,ngrid))/ipsum
endif
ip1=1
ip2=1
ip3=1
ip4=1
if (iy2(ix ,jy ,indexh,ngrid) .eq. icmv) ip1=0
if (iy2(ixp,jy ,indexh,ngrid) .eq. icmv) ip2=0
if (iy2(ix ,jyp,indexh,ngrid) .eq. icmv) ip3=0
if (iy2(ixp,jyp,indexh,ngrid) .eq. icmv) ip4=0
ipsum= ip1+ip2+ip3+ip4
if (ipsum .eq. 0) then
yi2(m)=icmv
else
yi2(m)=(ip1*p1*iy2(ix ,jy ,indexh,ngrid) &
+ ip2*p2*iy2(ixp,jy ,indexh,ngrid) &
+ ip3*p3*iy2(ix ,jyp,indexh,ngrid) &
+ ip4*p4*iy2(ixp,jyp,indexh,ngrid))/ipsum
endif
enddo
!CPS end clouds
10 continue
!************************************
! 2.) Temporal interpolation (linear)
!************************************
dt1=real(itime-itime1)
dt2=real(itime2-itime)
dt=dt1+dt2
! yint1=(y1(1)*dt2+y1(2)*dt1)/dt
! yint2=(y2(1)*dt2+y2(2)*dt1)/dt
yint3=(y3(1)*dt2+y3(2)*dt1)/dt
!CPS clouds:
intiy1=(yi1(1)*dt2 + yi1(2)*dt1)/dt
if (yi1(1) .eq. float(icmv)) intiy1=yi1(2)
if (yi1(2) .eq. float(icmv)) intiy1=yi1(1)
intiy2=(yi2(1)*dt2 + yi2(2)*dt1)/dt
if (yi2(1) .eq. float(icmv)) intiy2=yi2(2)
if (yi2(2) .eq. float(icmv)) intiy2=yi2(1)
if (intiy1 .ne. icmv .and. intiy2 .ne. icmv) then
intiy2 = intiy1 + intiy2 ! convert cloud thickness to cloud top
else
intiy1=icmv
intiy2=icmv
endif
!CPS end clouds
end subroutine interpol_rain_nests