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readwind_emos.f90

10.4.1_peseiGFS_025bugfixes+enhancementsdevrelease-10release-10.4.1scaling-bug

Last change on this file was 92fab65, checked in by Ignacio Pisso <ip@…>, 4 years ago
add SPDX-License-Identifier to all .f90 files
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1	! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt
2	! SPDX-License-Identifier: GPL-3.0-or-later
3
4	subroutine readwind(indj,n,uuh,vvh,wwh)
5
6	!**********************************************************************
7	! *
8	! TRAJECTORY MODEL SUBROUTINE READWIND *
9	! *
10	!**********************************************************************
11	! *
12	! AUTHOR: G. WOTAWA *
13	! DATE: 1997-08-05 *
14	! LAST UPDATE: 2000-10-17, Andreas Stohl *
15	! *
16	!**********************************************************************
17	! Changes, Bernd C. Krueger, Feb. 2001:
18	! Variables tth and qvh (on eta coordinates) in common block
19	!**********************************************************************
20	! *
21	! DESCRIPTION: *
22	! *
23	! READING OF ECMWF METEOROLOGICAL FIELDS FROM INPUT DATA FILES. THE *
24	! INPUT DATA FILES ARE EXPECTED TO BE AVAILABLE IN GRIB CODE *
25	! *
26	! INPUT: *
27	! indj indicates number of the wind field to be read in *
28	! n temporal index for meteorological fields (1 to 3)*
29	! *
30	! IMPORTANT VARIABLES FROM COMMON BLOCK: *
31	! *
32	! wfname File name of data to be read in *
33	! nx,ny,nuvz,nwz expected field dimensions *
34	! nlev_ec number of vertical levels ecmwf model *
35	! uu,vv,ww wind fields *
36	! tt,qv temperature and specific humidity *
37	! ps surface pressure *
38	! *
39	!**********************************************************************
40
41	use par_mod
42	use com_mod
43
44	implicit none
45
46	real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax)
47	real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax)
48	real :: wwh(0:nxmax-1,0:nymax-1,nwzmax)
49	integer :: indj,i,j,k,n,levdiff2,ifield,iumax,iwmax,lunit
50
51	! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING
52
53	! dimension of isec2 at least (22+n), where n is the number of parallels or
54	! meridians in a quasi-regular (reduced) Gaussian or lat/long grid
55
56	! dimension of zsec2 at least (10+nn), where nn is the number of vertical
57	! coordinate parameters
58
59	integer :: isec0(2),isec1(56),isec2(22+nxmax+nymax),isec3(2)
60	integer :: isec4(64),inbuff(jpack),ilen,ierr,iword
61	!integer iswap
62	real :: zsec2(60+2*nuvzmax),zsec3(2),zsec4(jpunp)
63	real :: xaux,yaux,xaux0,yaux0
64	real,parameter :: eps=1.e-4
65	real :: ewss(0:nxmax-1,0:nymax-1),nsss(0:nxmax-1,0:nymax-1)
66	real :: plev1,pmean,tv,fu,hlev1,ff10m,fflev1
67
68	character(len=1) :: yoper = 'D'
69	logical :: hflswitch,strswitch
70
71	hflswitch=.false.
72	strswitch=.false.
73	levdiff2=nlev_ec-nwz+1
74	iumax=0
75	iwmax=0
76
77	!
78	! OPENING OF DATA FILE (GRIB CODE)
79	!
80	5 call pbopen(lunit,path(3)(1:length(3))//wfname(indj),'r',ierr)
81	if(ierr.lt.0) goto 999
82
83	ifield=0
84	10 ifield=ifield+1
85	!
86	! GET NEXT FIELDS
87	!
88	call pbgrib(lunit,inbuff,jpack,ilen,ierr)
89	if(ierr.eq.-1) goto 50 ! EOF DETECTED
90	if(ierr.lt.-1) goto 888 ! ERROR DETECTED
91
92	ierr=1
93
94	! Check whether we are on a little endian or on a big endian computer
95	!********************************************************************
96
97	!if (inbuff(1).eq.1112101447) then ! little endian, swap bytes
98	! iswap=1+ilen/4
99	! call swap32(inbuff,iswap)
100	!else if (inbuff(1).ne.1196575042) then ! big endian
101	! stop 'subroutine gridcheck: corrupt GRIB data'
102	!endif
103
104
105	call gribex(isec0,isec1,isec2,zsec2,isec3,zsec3,isec4, &
106	zsec4,jpunp,inbuff,jpack,iword,yoper,ierr)
107	if (ierr.ne.0) goto 888 ! ERROR DETECTED
108
109	if(ifield.eq.1) then
110
111	! CHECK GRID SPECIFICATIONS
112
113	if(isec2(2).ne.nxfield) stop 'READWIND: NX NOT CONSISTENT'
114	if(isec2(3).ne.ny) stop 'READWIND: NY NOT CONSISTENT'
115	if(isec2(12)/2-1.ne.nlev_ec) &
116	stop 'READWIND: VERTICAL DISCRETIZATION NOT CONSISTENT'
117	xaux=real(isec2(5))/1000.+real(nxshift)*dx
118	yaux=real(isec2(7))/1000.
119	xaux0=xlon0
120	yaux0=ylat0
121	if(xaux.lt.0.) xaux=xaux+360.
122	if(yaux.lt.0.) yaux=yaux+360.
123	if(xaux0.lt.0.) xaux0=xaux0+360.
124	if(yaux0.lt.0.) yaux0=yaux0+360.
125	if(abs(xaux-xaux0).gt.eps) &
126	stop 'READWIND: LOWER LEFT LONGITUDE NOT CONSISTENT'
127	if(abs(yaux-yaux0).gt.eps) &
128	stop 'READWIND: LOWER LEFT LATITUDE NOT CONSISTENT'
129	endif
130
131	do j=0,nymin1
132	do i=0,nxfield-1
133	k=isec1(8)
134	if(isec1(6).eq.130) tth(i,j,nlev_ec-k+2,n)= &!! TEMPERATURE
135	zsec4(nxfield*(ny-j-1)+i+1)
136	if(isec1(6).eq.131) uuh(i,j,nlev_ec-k+2)= &!! U VELOCITY
137	zsec4(nxfield*(ny-j-1)+i+1)
138	if(isec1(6).eq.132) vvh(i,j,nlev_ec-k+2)= &!! V VELOCITY
139	zsec4(nxfield*(ny-j-1)+i+1)
140	if(isec1(6).eq.133) then !! SPEC. HUMIDITY
141	qvh(i,j,nlev_ec-k+2,n)=zsec4(nxfield*(ny-j-1)+i+1)
142	if (qvh(i,j,nlev_ec-k+2,n) .lt. 0.) &
143	qvh(i,j,nlev_ec-k+2,n) = 0.
144	! this is necessary because the gridded data may contain
145	! spurious negative values
146	endif
147	if(isec1(6).eq.134) ps(i,j,1,n)= &!! SURF. PRESS.
148	zsec4(nxfield*(ny-j-1)+i+1)
149
150	if(isec1(6).eq.135) wwh(i,j,nlev_ec-k+1)= &!! W VELOCITY
151	zsec4(nxfield*(ny-j-1)+i+1)
152	if(isec1(6).eq.141) sd(i,j,1,n)= &!! SNOW DEPTH
153	zsec4(nxfield*(ny-j-1)+i+1)
154	if(isec1(6).eq.151) msl(i,j,1,n)= &!! SEA LEVEL PRESS.
155	zsec4(nxfield*(ny-j-1)+i+1)
156	if(isec1(6).eq.164) tcc(i,j,1,n)= &!! CLOUD COVER
157	zsec4(nxfield*(ny-j-1)+i+1)
158	if(isec1(6).eq.165) u10(i,j,1,n)= &!! 10 M U VELOCITY
159	zsec4(nxfield*(ny-j-1)+i+1)
160	if(isec1(6).eq.166) v10(i,j,1,n)= &!! 10 M V VELOCITY
161	zsec4(nxfield*(ny-j-1)+i+1)
162	if(isec1(6).eq.167) tt2(i,j,1,n)= &!! 2 M TEMPERATURE
163	zsec4(nxfield*(ny-j-1)+i+1)
164	if(isec1(6).eq.168) td2(i,j,1,n)= &!! 2 M DEW POINT
165	zsec4(nxfield*(ny-j-1)+i+1)
166	if(isec1(6).eq.142) then !! LARGE SCALE PREC.
167	lsprec(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1)
168	if (lsprec(i,j,1,n).lt.0.) lsprec(i,j,1,n)=0.
169	endif
170	if(isec1(6).eq.143) then !! CONVECTIVE PREC.
171	convprec(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1)
172	if (convprec(i,j,1,n).lt.0.) convprec(i,j,1,n)=0.
173	endif
174	if(isec1(6).eq.146) sshf(i,j,1,n)= &!! SENS. HEAT FLUX
175	zsec4(nxfield*(ny-j-1)+i+1)
176	if((isec1(6).eq.146).and.(zsec4(nxfield*(ny-j-1)+i+1).ne.0.)) &
177	hflswitch=.true. ! Heat flux available
178	if(isec1(6).eq.176) then !! SOLAR RADIATION
179	ssr(i,j,1,n)=zsec4(nxfield*(ny-j-1)+i+1)
180	if (ssr(i,j,1,n).lt.0.) ssr(i,j,1,n)=0.
181	endif
182	if(isec1(6).eq.180) ewss(i,j)= &!! EW SURFACE STRESS
183	zsec4(nxfield*(ny-j-1)+i+1)
184	if(isec1(6).eq.181) nsss(i,j)= &!! NS SURFACE STRESS
185	zsec4(nxfield*(ny-j-1)+i+1)
186	if(((isec1(6).eq.180).or.(isec1(6).eq.181)).and. &
187	(zsec4(nxfield*(ny-j-1)+i+1).ne.0.)) strswitch=.true. ! stress available
188	if(isec1(6).eq.129) oro(i,j)= &!! ECMWF OROGRAPHY
189	zsec4(nxfield*(ny-j-1)+i+1)/ga
190	if(isec1(6).eq.160) excessoro(i,j)= &!! STANDARD DEVIATION OF OROGRAPHY
191	zsec4(nxfield*(ny-j-1)+i+1)
192	if(isec1(6).eq.172) lsm(i,j)= &!! ECMWF LAND SEA MASK
193	zsec4(nxfield*(ny-j-1)+i+1)
194	if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1)
195	if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1)
196	end do
197	end do
198
199	goto 10 !! READ NEXT LEVEL OR PARAMETER
200	!
201	! CLOSING OF INPUT DATA FILE
202	!
203	50 call pbclose(lunit,ierr) !! FINNISHED READING / CLOSING GRIB FILE
204
205	if(levdiff2.eq.0) then
206	iwmax=nlev_ec+1
207	do i=0,nxmin1
208	do j=0,nymin1
209	wwh(i,j,nlev_ec+1)=0.
210	end do
211	end do
212	endif
213
214
215	! For global fields, assign the leftmost data column also to the rightmost
216	! data column; if required, shift whole grid by nxshift grid points
217	!*************************************************************************
218
219	if (xglobal) then
220	call shift_field_0(ewss,nxfield,ny)
221	call shift_field_0(nsss,nxfield,ny)
222	call shift_field_0(oro,nxfield,ny)
223	call shift_field_0(excessoro,nxfield,ny)
224	call shift_field_0(lsm,nxfield,ny)
225	call shift_field(ps,nxfield,ny,1,1,2,n)
226	call shift_field(sd,nxfield,ny,1,1,2,n)
227	call shift_field(msl,nxfield,ny,1,1,2,n)
228	call shift_field(tcc,nxfield,ny,1,1,2,n)
229	call shift_field(u10,nxfield,ny,1,1,2,n)
230	call shift_field(v10,nxfield,ny,1,1,2,n)
231	call shift_field(tt2,nxfield,ny,1,1,2,n)
232	call shift_field(td2,nxfield,ny,1,1,2,n)
233	call shift_field(lsprec,nxfield,ny,1,1,2,n)
234	call shift_field(convprec,nxfield,ny,1,1,2,n)
235	call shift_field(sshf,nxfield,ny,1,1,2,n)
236	call shift_field(ssr,nxfield,ny,1,1,2,n)
237	call shift_field(tth,nxfield,ny,nuvzmax,nuvz,2,n)
238	call shift_field(qvh,nxfield,ny,nuvzmax,nuvz,2,n)
239	call shift_field(uuh,nxfield,ny,nuvzmax,nuvz,1,1)
240	call shift_field(vvh,nxfield,ny,nuvzmax,nuvz,1,1)
241	call shift_field(wwh,nxfield,ny,nwzmax,nwz,1,1)
242	endif
243
244	do i=0,nxmin1
245	do j=0,nymin1
246	surfstr(i,j,1,n)=sqrt(ewss(i,j)2+nsss(i,j)2)
247	end do
248	end do
249
250	if ((.not.hflswitch).or.(.not.strswitch)) then
251	write(,) 'WARNING: No flux data contained in GRIB file ', &
252	wfname(indj)
253
254	! CALCULATE USTAR AND SSHF USING THE PROFILE METHOD
255	! As ECMWF has increased the model resolution, such that now the first model
256	! level is at about 10 m (where 10-m wind is given), use the 2nd ECMWF level
257	! (3rd model level in FLEXPART) for the profile method
258	!***************************************************************************
259
260	do i=0,nxmin1
261	do j=0,nymin1
262	plev1=akz(3)+bkz(3)*ps(i,j,1,n)
263	pmean=0.5*(ps(i,j,1,n)+plev1)
264	tv=tth(i,j,3,n)(1.+0.61qvh(i,j,3,n))
265	fu=-r_air*tv/ga/pmean
266	hlev1=fu*(plev1-ps(i,j,1,n)) ! HEIGTH OF FIRST MODEL LAYER
267	ff10m= sqrt(u10(i,j,1,n)2+v10(i,j,1,n)2)
268	fflev1=sqrt(uuh(i,j,3)2+vvh(i,j,3)2)
269	call pbl_profile(ps(i,j,1,n),td2(i,j,1,n),hlev1, &
270	tt2(i,j,1,n),tth(i,j,3,n),ff10m,fflev1, &
271	surfstr(i,j,1,n),sshf(i,j,1,n))
272	if(sshf(i,j,1,n).gt.200.) sshf(i,j,1,n)=200.
273	if(sshf(i,j,1,n).lt.-400.) sshf(i,j,1,n)=-400.
274	end do
275	end do
276	endif
277
278
279	! Assign 10 m wind to model level at eta=1.0 to have one additional model
280	! level at the ground
281	! Specific humidity is taken the same as at one level above
282	! Temperature is taken as 2 m temperature
283	!**************************************************************************
284
285	do i=0,nxmin1
286	do j=0,nymin1
287	uuh(i,j,1)=u10(i,j,1,n)
288	vvh(i,j,1)=v10(i,j,1,n)
289	qvh(i,j,1,n)=qvh(i,j,2,n)
290	tth(i,j,1,n)=tt2(i,j,1,n)
291	end do
292	end do
293
294	if(iumax.ne.nuvz-1) stop 'READWIND: NUVZ NOT CONSISTENT'
295	if(iwmax.ne.nwz) stop 'READWIND: NWZ NOT CONSISTENT'
296
297	return
298	888 write(,) ' #### FLEXPART MODEL ERROR! WINDFIELD #### '
299	write(,) ' #### ',wfname(indj),' #### '
300	write(,) ' #### IS NOT GRIB FORMAT !!! #### '
301	stop 'Execution terminated'
302	999 write(,) ' #### FLEXPART MODEL ERROR! WINDFIELD #### '
303	write(,) ' #### ',wfname(indj),' #### '
304	write(,) ' #### CANNOT BE OPENED !!! #### '
305	stop 'Execution terminated'
306
307	end subroutine readwind

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