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module_sf_sfclay.F @ 3094

Last change on this file since 3094 was 2759, checked in by aslmd, 2 years ago
adding unmodified code from WRFV3.0.1.1, expurged from useless data +1M size
File size: 45.1 KB

Line
1	!WRF:MODEL_LAYER:PHYSICS
2	!
3	MODULE module_sf_sfclay
4
5	REAL , PARAMETER :: VCONVC=1.
6	REAL , PARAMETER :: CZO=0.0185
7	REAL , PARAMETER :: OZO=1.59E-5
8
9	REAL, DIMENSION(0:1000 ),SAVE :: PSIMTB,PSIHTB
10
11	CONTAINS
12
13	!-------------------------------------------------------------------
14	SUBROUTINE SFCLAY(U3D,V3D,T3D,QV3D,P3D,dz8w, &
15	CP,G,ROVCP,R,XLV,PSFC,CHS,CHS2,CQS2,CPM, &
16	ZNT,UST,PBLH,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH, &
17	XLAND,HFX,QFX,LH,TSK,FLHC,FLQC,QGH,QSFC,RMOL, &
18	U10,V10,TH2,T2,Q2, &
19	GZ1OZ0,WSPD,BR,ISFFLX,DX, &
20	SVP1,SVP2,SVP3,SVPT0,EP1,EP2, &
21	KARMAN,EOMEG,STBOLT, &
22	P1000mb, &
23	ids,ide, jds,jde, kds,kde, &
24	ims,ime, jms,jme, kms,kme, &
25	its,ite, jts,jte, kts,kte, &
26	uratx,vratx,tratx, &
27	ustm,ck,cka,cd,cda,isftcflx )
28	!-------------------------------------------------------------------
29	IMPLICIT NONE
30	!-------------------------------------------------------------------
31	!-- U3D 3D u-velocity interpolated to theta points (m/s)
32	!-- V3D 3D v-velocity interpolated to theta points (m/s)
33	!-- T3D temperature (K)
34	!-- QV3D 3D water vapor mixing ratio (Kg/Kg)
35	!-- P3D 3D pressure (Pa)
36	!-- dz8w dz between full levels (m)
37	!-- CP heat capacity at constant pressure for dry air (J/kg/K)
38	!-- G acceleration due to gravity (m/s^2)
39	!-- ROVCP R/CP
40	!-- R gas constant for dry air (J/kg/K)
41	!-- XLV latent heat of vaporization for water (J/kg)
42	!-- PSFC surface pressure (Pa)
43	!-- ZNT roughness length (m)
44	!-- UST u* in similarity theory (m/s)
45	!-- USTM u* in similarity theory (m/s) without vconv correction
46	! used to couple with TKE scheme
47	!-- PBLH PBL height from previous time (m)
48	!-- MAVAIL surface moisture availability (between 0 and 1)
49	!-- ZOL z/L height over Monin-Obukhov length
50	!-- MOL T* (similarity theory) (K)
51	!-- REGIME flag indicating PBL regime (stable, unstable, etc.)
52	!-- PSIM similarity stability function for momentum
53	!-- PSIH similarity stability function for heat
54	!-- XLAND land mask (1 for land, 2 for water)
55	!-- HFX upward heat flux at the surface (W/m^2)
56	!-- QFX upward moisture flux at the surface (kg/m^2/s)
57	!-- LH net upward latent heat flux at surface (W/m^2)
58	!-- TSK surface temperature (K)
59	!-- FLHC exchange coefficient for heat (W/m^2/K)
60	!-- FLQC exchange coefficient for moisture (kg/m^2/s)
61	!-- CHS heat/moisture exchange coefficient for LSM (m/s)
62	!-- QGH lowest-level saturated mixing ratio
63	!-- QSFC ground saturated mixing ratio
64	!-- uratx ratio of surface U to U10
65	!-- vratx ratio of surface V to V10
66	!-- tratx ratio of surface T to TH2
67	!-- U10 diagnostic 10m u wind
68	!-- V10 diagnostic 10m v wind
69	!-- TH2 diagnostic 2m theta (K)
70	!-- T2 diagnostic 2m temperature (K)
71	!-- Q2 diagnostic 2m mixing ratio (kg/kg)
72	!-- GZ1OZ0 log(z/z0) where z0 is roughness length
73	!-- WSPD wind speed at lowest model level (m/s)
74	!-- BR bulk Richardson number in surface layer
75	!-- ISFFLX isfflx=1 for surface heat and moisture fluxes
76	!-- DX horizontal grid size (m)
77	!-- SVP1 constant for saturation vapor pressure (kPa)
78	!-- SVP2 constant for saturation vapor pressure (dimensionless)
79	!-- SVP3 constant for saturation vapor pressure (K)
80	!-- SVPT0 constant for saturation vapor pressure (K)
81	!-- EP1 constant for virtual temperature (R_v/R_d - 1) (dimensionless)
82	!-- EP2 constant for specific humidity calculation
83	! (R_d/R_v) (dimensionless)
84	!-- KARMAN Von Karman constant
85	!-- EOMEG angular velocity of earth's rotation (rad/s)
86	!-- STBOLT Stefan-Boltzmann constant (W/m^2/K^4)
87	!-- ck enthalpy exchange coeff at 10 meters
88	!-- cd momentum exchange coeff at 10 meters
89	!-- cka enthalpy exchange coeff at the lowest model level
90	!-- cda momentum exchange coeff at the lowest model level
91	!-- isftcflx =0, (Charnock and Carlson-Boland); =1, AHW Ck, Cd
92	!-- ids start index for i in domain
93	!-- ide end index for i in domain
94	!-- jds start index for j in domain
95	!-- jde end index for j in domain
96	!-- kds start index for k in domain
97	!-- kde end index for k in domain
98	!-- ims start index for i in memory
99	!-- ime end index for i in memory
100	!-- jms start index for j in memory
101	!-- jme end index for j in memory
102	!-- kms start index for k in memory
103	!-- kme end index for k in memory
104	!-- its start index for i in tile
105	!-- ite end index for i in tile
106	!-- jts start index for j in tile
107	!-- jte end index for j in tile
108	!-- kts start index for k in tile
109	!-- kte end index for k in tile
110	!-------------------------------------------------------------------
111	INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde, &
112	ims,ime, jms,jme, kms,kme, &
113	its,ite, jts,jte, kts,kte
114	!
115	INTEGER, INTENT(IN ) :: ISFFLX
116	REAL, INTENT(IN ) :: SVP1,SVP2,SVP3,SVPT0
117	REAL, INTENT(IN ) :: EP1,EP2,KARMAN,EOMEG,STBOLT
118	REAL, INTENT(IN ) :: P1000mb
119	!
120	REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , &
121	INTENT(IN ) :: dz8w
122
123	REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , &
124	INTENT(IN ) :: QV3D, &
125	P3D, &
126	T3D
127
128	REAL, DIMENSION( ims:ime, jms:jme ) , &
129	INTENT(IN ) :: MAVAIL, &
130	PBLH, &
131	XLAND, &
132	TSK
133	REAL, DIMENSION( ims:ime, jms:jme ) , &
134	INTENT(OUT ) :: U10, &
135	V10, &
136	TH2, &
137	T2, &
138	Q2, &
139	QSFC
140
141	!
142	REAL, DIMENSION( ims:ime, jms:jme ) , &
143	INTENT(INOUT) :: REGIME, &
144	HFX, &
145	QFX, &
146	LH, &
147	MOL,RMOL
148	!m the following 5 are change to memory size
149	!
150	REAL, DIMENSION( ims:ime, jms:jme ) , &
151	INTENT(INOUT) :: GZ1OZ0,WSPD,BR, &
152	PSIM,PSIH
153
154	REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , &
155	INTENT(IN ) :: U3D, &
156	V3D
157
158	REAL, DIMENSION( ims:ime, jms:jme ) , &
159	INTENT(IN ) :: PSFC
160
161	REAL, DIMENSION( ims:ime, jms:jme ) , &
162	INTENT(INOUT) :: ZNT, &
163	ZOL, &
164	UST, &
165	CPM, &
166	CHS2, &
167	CQS2, &
168	CHS
169
170	REAL, DIMENSION( ims:ime, jms:jme ) , &
171	INTENT(INOUT) :: FLHC,FLQC
172
173	REAL, DIMENSION( ims:ime, jms:jme ) , &
174	INTENT(INOUT) :: &
175	QGH
176
177
178
179	REAL, INTENT(IN ) :: CP,G,ROVCP,R,XLV,DX
180
181	REAL, OPTIONAL, DIMENSION( ims:ime, jms:jme ) , &
182	INTENT(OUT) :: uratx,vratx,tratx
183
184	REAL, OPTIONAL, DIMENSION( ims:ime, jms:jme ) , &
185	INTENT(OUT) :: ck,cka,cd,cda,ustm
186
187	INTEGER, OPTIONAL, INTENT(IN ) :: ISFTCFLX
188
189	! LOCAL VARS
190
191	REAL, DIMENSION( its:ite ) :: U1D, &
192	V1D, &
193	QV1D, &
194	P1D, &
195	T1D
196
197	REAL, DIMENSION( its:ite ) :: dz8w1d
198
199	INTEGER :: I,J
200
201	DO J=jts,jte
202	DO i=its,ite
203	dz8w1d(I) = dz8w(i,1,j)
204	ENDDO
205
206	DO i=its,ite
207	U1D(i) =U3D(i,1,j)
208	V1D(i) =V3D(i,1,j)
209	QV1D(i)=QV3D(i,1,j)
210	P1D(i) =P3D(i,1,j)
211	T1D(i) =T3D(i,1,j)
212	ENDDO
213
214	! Sending array starting locations of optional variables may cause
215	! troubles, so we explicitly change the call.
216
217	CALL SFCLAY1D(J,U1D,V1D,T1D,QV1D,P1D,dz8w1d, &
218	CP,G,ROVCP,R,XLV,PSFC(ims,j),CHS(ims,j),CHS2(ims,j),&
219	CQS2(ims,j),CPM(ims,j),PBLH(ims,j), RMOL(ims,j), &
220	ZNT(ims,j),UST(ims,j),MAVAIL(ims,j),ZOL(ims,j), &
221	MOL(ims,j),REGIME(ims,j),PSIM(ims,j),PSIH(ims,j), &
222	XLAND(ims,j),HFX(ims,j),QFX(ims,j),TSK(ims,j), &
223	U10(ims,j),V10(ims,j),TH2(ims,j),T2(ims,j), &
224	Q2(ims,j),FLHC(ims,j),FLQC(ims,j),QGH(ims,j), &
225	QSFC(ims,j),LH(ims,j), &
226	GZ1OZ0(ims,j),WSPD(ims,j),BR(ims,j),ISFFLX,DX, &
227	SVP1,SVP2,SVP3,SVPT0,EP1,EP2,KARMAN,EOMEG,STBOLT, &
228	P1000mb, &
229	ids,ide, jds,jde, kds,kde, &
230	ims,ime, jms,jme, kms,kme, &
231	its,ite, jts,jte, kts,kte &
232	#if ( EM_CORE == 1 )
233	,uratx(ims,j),vratx(ims,j),tratx(ims,j), &
234	isftcflx, &
235	USTM(ims,j),CK(ims,j),CKA(ims,j), &
236	CD(ims,j),CDA(ims,j) &
237	#endif
238	)
239	ENDDO
240
241
242	END SUBROUTINE SFCLAY
243
244
245	!-------------------------------------------------------------------
246	SUBROUTINE SFCLAY1D(J,UX,VX,T1D,QV1D,P1D,dz8w1d, &
247	CP,G,ROVCP,R,XLV,PSFCPA,CHS,CHS2,CQS2,CPM,PBLH,RMOL, &
248	ZNT,UST,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH, &
249	XLAND,HFX,QFX,TSK, &
250	U10,V10,TH2,T2,Q2,FLHC,FLQC,QGH, &
251	QSFC,LH,GZ1OZ0,WSPD,BR,ISFFLX,DX, &
252	SVP1,SVP2,SVP3,SVPT0,EP1,EP2, &
253	KARMAN,EOMEG,STBOLT, &
254	P1000mb, &
255	ids,ide, jds,jde, kds,kde, &
256	ims,ime, jms,jme, kms,kme, &
257	its,ite, jts,jte, kts,kte, &
258	uratx,vratx,tratx, &
259	isftcflx, &
260	ustm,ck,cka,cd,cda )
261	!-------------------------------------------------------------------
262	IMPLICIT NONE
263	!-------------------------------------------------------------------
264	REAL, PARAMETER :: XKA=2.4E-5
265	REAL, PARAMETER :: PRT=1.
266
267	INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde, &
268	ims,ime, jms,jme, kms,kme, &
269	its,ite, jts,jte, kts,kte, &
270	J
271	!
272	INTEGER, INTENT(IN ) :: ISFFLX
273	REAL, INTENT(IN ) :: SVP1,SVP2,SVP3,SVPT0
274	REAL, INTENT(IN ) :: EP1,EP2,KARMAN,EOMEG,STBOLT
275	REAL, INTENT(IN ) :: P1000mb
276
277	!
278	REAL, DIMENSION( ims:ime ) , &
279	INTENT(IN ) :: MAVAIL, &
280	PBLH, &
281	XLAND, &
282	TSK
283	!
284	REAL, DIMENSION( ims:ime ) , &
285	INTENT(IN ) :: PSFCPA
286
287	REAL, DIMENSION( ims:ime ) , &
288	INTENT(INOUT) :: REGIME, &
289	HFX, &
290	QFX, &
291	MOL,RMOL
292	!m the following 5 are changed to memory size---
293	!
294	REAL, DIMENSION( ims:ime ) , &
295	INTENT(INOUT) :: GZ1OZ0,WSPD,BR, &
296	PSIM,PSIH
297
298	REAL, DIMENSION( ims:ime ) , &
299	INTENT(INOUT) :: ZNT, &
300	ZOL, &
301	UST, &
302	CPM, &
303	CHS2, &
304	CQS2, &
305	CHS
306
307	REAL, DIMENSION( ims:ime ) , &
308	INTENT(INOUT) :: FLHC,FLQC
309
310	REAL, DIMENSION( ims:ime ) , &
311	INTENT(INOUT) :: &
312	QGH
313
314	REAL, DIMENSION( ims:ime ) , &
315	INTENT(OUT) :: U10,V10, &
316	TH2,T2,Q2,QSFC,LH
317
318
319	REAL, INTENT(IN ) :: CP,G,ROVCP,R,XLV,DX
320
321	! MODULE-LOCAL VARIABLES, DEFINED IN SUBROUTINE SFCLAY
322	REAL, DIMENSION( its:ite ), INTENT(IN ) :: dz8w1d
323
324	REAL, DIMENSION( its:ite ), INTENT(IN ) :: UX, &
325	VX, &
326	QV1D, &
327	P1D, &
328	T1D
329
330	REAL, OPTIONAL, DIMENSION( ims:ime ) , &
331	INTENT(OUT) :: uratx,vratx,tratx
332
333	REAL, OPTIONAL, DIMENSION( ims:ime ) , &
334	INTENT(OUT) :: ck,cka,cd,cda,ustm
335
336	INTEGER, OPTIONAL, INTENT(IN ) :: ISFTCFLX
337
338	! LOCAL VARS
339
340	REAL, DIMENSION( its:ite ) :: ZA, &
341	THVX,ZQKL, &
342	ZQKLP1, &
343	THX,QX, &
344	PSIH2, &
345	PSIM2, &
346	PSIH10, &
347	PSIM10, &
348	DENOMQ, &
349	WSPDI, &
350	GZ2OZ0, &
351	GZ10OZ0
352	!
353	REAL, DIMENSION( its:ite ) :: &
354	RHOX,GOVRTH, &
355	TGDSA
356	!
357	REAL, DIMENSION( its:ite) :: SCR3,SCR4
358	REAL, DIMENSION( its:ite ) :: THGB, PSFC
359	!
360	INTEGER :: KL
361
362	INTEGER :: N,I,K,KK,L,NZOL,NK,NZOL2,NZOL10
363
364	REAL :: PL,THCON,TVCON,E1
365	REAL :: ZL,TSKV,DTHVDZ,DTHVM,VCONV,RZOL,RZOL2,RZOL10,ZOL2,ZOL10
366	REAL :: DTG,PSIX,DTTHX,PSIX10,PSIT,PSIT2,PSIQ,PSIQ2,PSIQ10
367	REAL :: FLUXC,VSGD,Z0Q
368	!-------------------------------------------------------------------
369	KL=kte
370
371	DO i=its,ite
372	! PSFC cb
373	PSFC(I)=PSFCPA(I)/1000.
374	ENDDO
375	!
376	!----CONVERT GROUND TEMPERATURE TO POTENTIAL TEMPERATURE:
377	!
378	DO 5 I=its,ite
379	TGDSA(I)=TSK(I)
380	! PSFC cb
381	! THGB(I)=TSK(I)(100./PSFC(I))*ROVCP
382	THGB(I)=TSK(I)(P1000mb/PSFCPA(I))*ROVCP
383	5 CONTINUE
384	!
385	!-----DECOUPLE FLUX-FORM VARIABLES TO GIVE U,V,T,THETA,THETA-VIR.,
386	! T-VIR., QV, AND QC AT CROSS POINTS AND AT KTAU-1.
387	!
388	! * NOTE *
389	! THE BOUNDARY WINDS MAY NOT BE ADEQUATELY AFFECTED BY FRICTION,
390	! SO USE ONLY INTERIOR VALUES OF UX AND VX TO CALCULATE
391	! TENDENCIES.
392	!
393	10 CONTINUE
394
395	! DO 24 I=its,ite
396	! UX(I)=U1D(I)
397	! VX(I)=V1D(I)
398	! 24 CONTINUE
399
400	26 CONTINUE
401
402	!.....SCR3(I,K) STORE TEMPERATURE,
403	! SCR4(I,K) STORE VIRTUAL TEMPERATURE.
404
405	DO 30 I=its,ite
406	! PL cb
407	PL=P1D(I)/1000.
408	SCR3(I)=T1D(I)
409	! THCON=(100./PL)**ROVCP
410	THCON=(P1000mb0.001/PL)*ROVCP
411	THX(I)=SCR3(I)*THCON
412	SCR4(I)=SCR3(I)
413	THVX(I)=THX(I)
414	QX(I)=0.
415	30 CONTINUE
416	!
417	DO I=its,ite
418	QGH(I)=0.
419	FLHC(I)=0.
420	FLQC(I)=0.
421	CPM(I)=CP
422	ENDDO
423	!
424	! IF(IDRY.EQ.1)GOTO 80
425	DO 50 I=its,ite
426	QX(I)=QV1D(I)
427	TVCON=(1.+EP1*QX(I))
428	THVX(I)=THX(I)*TVCON
429	SCR4(I)=SCR3(I)*TVCON
430	50 CONTINUE
431	!
432	DO 60 I=its,ite
433	E1=SVP1EXP(SVP2(TGDSA(I)-SVPT0)/(TGDSA(I)-SVP3))
434	QSFC(I)=EP2*E1/(PSFC(I)-E1)
435	! QGH CHANGED TO USE LOWEST-LEVEL AIR TEMP CONSISTENT WITH MYJSFC CHANGE
436	! Q2SAT = QGH IN LSM
437	E1=SVP1EXP(SVP2(T1D(I)-SVPT0)/(T1D(I)-SVP3))
438	PL=P1D(I)/1000.
439	QGH(I)=EP2*E1/(PL-E1)
440	CPM(I)=CP(1.+0.8QX(I))
441	60 CONTINUE
442	80 CONTINUE
443
444	!-----COMPUTE THE HEIGHT OF FULL- AND HALF-SIGMA LEVELS ABOVE GROUND
445	! LEVEL, AND THE LAYER THICKNESSES.
446
447	DO 90 I=its,ite
448	ZQKLP1(I)=0.
449	RHOX(I)=PSFC(I)1000./(RSCR4(I))
450	90 CONTINUE
451	!
452	DO 110 I=its,ite
453	ZQKL(I)=dz8w1d(I)+ZQKLP1(I)
454	110 CONTINUE
455	!
456	DO 120 I=its,ite
457	ZA(I)=0.5*(ZQKL(I)+ZQKLP1(I))
458	120 CONTINUE
459	!
460	DO 160 I=its,ite
461	GOVRTH(I)=G/THX(I)
462	160 CONTINUE
463
464	!-----CALCULATE BULK RICHARDSON NO. OF SURFACE LAYER, ACCORDING TO
465	! AKB(1976), EQ(12).
466
467	DO 260 I=its,ite
468	GZ1OZ0(I)=ALOG(ZA(I)/ZNT(I))
469	GZ2OZ0(I)=ALOG(2./ZNT(I))
470	GZ10OZ0(I)=ALOG(10./ZNT(I))
471	IF((XLAND(I)-1.5).GE.0)THEN
472	ZL=ZNT(I)
473	ELSE
474	ZL=0.01
475	ENDIF
476	WSPD(I)=SQRT(UX(I)UX(I)+VX(I)VX(I))
477
478	TSKV=THGB(I)(1.+EP1QSFC(I)*MAVAIL(I))
479	DTHVDZ=(THVX(I)-TSKV)
480	! Convective velocity scale Vc and subgrid-scale velocity Vsg
481	! following Beljaars (1995, QJRMS) and Mahrt and Sun (1995, MWR)
482	! ... HONG Aug. 2001
483	!
484	! VCONV = 0.25sqrt(g/tskvpblh(i)*dthvm)
485	! Use Beljaars over land, old MM5 (Wyngaard) formula over water
486	if (xland(i).lt.1.5) then
487	fluxc = max(hfx(i)/rhox(i)/cp &
488	+ ep1tskvqfx(i)/rhox(i),0.)
489	VCONV = vconvc(g/tgdsa(i)pblh(i)fluxc)*.33
490	else
491	IF(-DTHVDZ.GE.0)THEN
492	DTHVM=-DTHVDZ
493	ELSE
494	DTHVM=0.
495	ENDIF
496	VCONV = 2.*SQRT(DTHVM)
497	endif
498	! Mahrt and Sun low-res correction
499	VSGD = 0.32 * (max(dx/5000.-1.,0.))**.33
500	WSPD(I)=SQRT(WSPD(I)WSPD(I)+VCONVVCONV+vsgd*vsgd)
501	WSPD(I)=AMAX1(WSPD(I),0.1)
502	BR(I)=GOVRTH(I)ZA(I)DTHVDZ/(WSPD(I)*WSPD(I))
503	! IF PREVIOUSLY UNSTABLE, DO NOT LET INTO REGIMES 1 AND 2
504	IF(MOL(I).LT.0.)BR(I)=AMIN1(BR(I),0.0)
505	!jdf
506	RMOL(I)=-GOVRTH(I)DTHVDZZA(I)*KARMAN
507	!jdf
508
509	260 CONTINUE
510
511	!
512	!-----DIAGNOSE BASIC PARAMETERS FOR THE APPROPRIATED STABILITY CLASS:
513	!
514	!
515	! THE STABILITY CLASSES ARE DETERMINED BY BR (BULK RICHARDSON NO.)
516	! AND HOL (HEIGHT OF PBL/MONIN-OBUKHOV LENGTH).
517	!
518	! CRITERIA FOR THE CLASSES ARE AS FOLLOWS:
519	!
520	! 1. BR .GE. 0.2;
521	! REPRESENTS NIGHTTIME STABLE CONDITIONS (REGIME=1),
522	!
523	! 2. BR .LT. 0.2 .AND. BR .GT. 0.0;
524	! REPRESENTS DAMPED MECHANICAL TURBULENT CONDITIONS
525	! (REGIME=2),
526	!
527	! 3. BR .EQ. 0.0
528	! REPRESENTS FORCED CONVECTION CONDITIONS (REGIME=3),
529	!
530	! 4. BR .LT. 0.0
531	! REPRESENTS FREE CONVECTION CONDITIONS (REGIME=4).
532	!
533	!CCCCC
534
535	DO 320 I=its,ite
536	!CCCCC
537	!CC REMOVE REGIME 3 DEPENDENCE ON PBL HEIGHT
538	!CC IF(BR(I).LT.0..AND.HOL(I,J).GT.1.5)GOTO 310
539	IF(BR(I).LT.0.)GOTO 310
540	!
541	!-----CLASS 1; STABLE (NIGHTTIME) CONDITIONS:
542	!
543	IF(BR(I).LT.0.2)GOTO 270
544	REGIME(I)=1.
545	PSIM(I)=-10.*GZ1OZ0(I)
546	! LOWER LIMIT ON PSI IN STABLE CONDITIONS
547	PSIM(I)=AMAX1(PSIM(I),-10.)
548	PSIH(I)=PSIM(I)
549	PSIM10(I)=10./ZA(I)*PSIM(I)
550	PSIM10(I)=AMAX1(PSIM10(I),-10.)
551	PSIH10(I)=PSIM10(I)
552	PSIM2(I)=2./ZA(I)*PSIM(I)
553	PSIM2(I)=AMAX1(PSIM2(I),-10.)
554	PSIH2(I)=PSIM2(I)
555
556	! 1.0 over Monin-Obukhov length
557	IF(UST(I).LT.0.01)THEN
558	RMOL(I)=BR(I)*GZ1OZ0(I) !ZA/L
559	ELSE
560	RMOL(I)=KARMANGOVRTH(I)ZA(I)MOL(I)/(UST(I)UST(I)) !ZA/L
561	ENDIF
562	RMOL(I)=AMIN1(RMOL(I),9.999) ! ZA/L
563	RMOL(I) = RMOL(I)/ZA(I) !1.0/L
564
565	GOTO 320
566	!
567	!-----CLASS 2; DAMPED MECHANICAL TURBULENCE:
568	!
569	270 IF(BR(I).EQ.0.0)GOTO 280
570	REGIME(I)=2.
571	PSIM(I)=-5.0BR(I)GZ1OZ0(I)/(1.1-5.0*BR(I))
572	! LOWER LIMIT ON PSI IN STABLE CONDITIONS
573	PSIM(I)=AMAX1(PSIM(I),-10.)
574	!.....AKB(1976), EQ(16).
575	PSIH(I)=PSIM(I)
576	PSIM10(I)=10./ZA(I)*PSIM(I)
577	PSIM10(I)=AMAX1(PSIM10(I),-10.)
578	PSIH10(I)=PSIM10(I)
579	PSIM2(I)=2./ZA(I)*PSIM(I)
580	PSIM2(I)=AMAX1(PSIM2(I),-10.)
581	PSIH2(I)=PSIM2(I)
582
583	! Linear form: PSIM = -0.5*ZA/L; e.g, see eqn 16 of
584	! Blackadar, Modeling the nocturnal boundary layer, Preprints,
585	! Third Symposium on Atmospheric Turbulence Diffusion and Air Quality,
586	! Raleigh, NC, 1976
587	ZOL(I) = BR(I)GZ1OZ0(I)/(1.00001-5.0BR(I))
588
589	if ( ZOL(I) .GT. 0.5 ) then ! linear form ok
590	! Holtslag and de Bruin, J. App. Meteor 27, 689-704, 1988;
591	! see also, Launiainen, Boundary-Layer Meteor 76,165-179, 1995
592	! Eqn (8) of Launiainen, 1995
593	ZOL(I) = ( 1.89GZ1OZ0(I) + 44.2 ) BR(I)*BR(I) &
594	+ ( 1.18GZ1OZ0(I) - 1.37 ) BR(I)
595	ZOL(I)=AMIN1(ZOL(I),9.999)
596	end if
597
598	! 1.0 over Monin-Obukhov length
599	RMOL(I)= ZOL(I)/ZA(I)
600
601	GOTO 320
602	!
603	!-----CLASS 3; FORCED CONVECTION:
604	!
605	280 REGIME(I)=3.
606	PSIM(I)=0.0
607	PSIH(I)=PSIM(I)
608	PSIM10(I)=0.
609	PSIH10(I)=PSIM10(I)
610	PSIM2(I)=0.
611	PSIH2(I)=PSIM2(I)
612
613
614	IF(UST(I).LT.0.01)THEN
615	ZOL(I)=BR(I)*GZ1OZ0(I)
616	ELSE
617	ZOL(I)=KARMANGOVRTH(I)ZA(I)MOL(I)/(UST(I)UST(I))
618	ENDIF
619
620	RMOL(I) = ZOL(I)/ZA(I)
621
622	GOTO 320
623	!
624	!-----CLASS 4; FREE CONVECTION:
625	!
626	310 CONTINUE
627	REGIME(I)=4.
628	IF(UST(I).LT.0.01)THEN
629	ZOL(I)=BR(I)*GZ1OZ0(I)
630	ELSE
631	ZOL(I)=KARMANGOVRTH(I)ZA(I)MOL(I)/(UST(I)UST(I))
632	ENDIF
633	ZOL10=10./ZA(I)*ZOL(I)
634	ZOL2=2./ZA(I)*ZOL(I)
635	ZOL(I)=AMIN1(ZOL(I),0.)
636	ZOL(I)=AMAX1(ZOL(I),-9.9999)
637	ZOL10=AMIN1(ZOL10,0.)
638	ZOL10=AMAX1(ZOL10,-9.9999)
639	ZOL2=AMIN1(ZOL2,0.)
640	ZOL2=AMAX1(ZOL2,-9.9999)
641	NZOL=INT(-ZOL(I)*100.)
642	RZOL=-ZOL(I)*100.-NZOL
643	NZOL10=INT(-ZOL10*100.)
644	RZOL10=-ZOL10*100.-NZOL10
645	NZOL2=INT(-ZOL2*100.)
646	RZOL2=-ZOL2*100.-NZOL2
647	PSIM(I)=PSIMTB(NZOL)+RZOL*(PSIMTB(NZOL+1)-PSIMTB(NZOL))
648	PSIH(I)=PSIHTB(NZOL)+RZOL*(PSIHTB(NZOL+1)-PSIHTB(NZOL))
649	PSIM10(I)=PSIMTB(NZOL10)+RZOL10*(PSIMTB(NZOL10+1)-PSIMTB(NZOL10))
650	PSIH10(I)=PSIHTB(NZOL10)+RZOL10*(PSIHTB(NZOL10+1)-PSIHTB(NZOL10))
651	PSIM2(I)=PSIMTB(NZOL2)+RZOL2*(PSIMTB(NZOL2+1)-PSIMTB(NZOL2))
652	PSIH2(I)=PSIHTB(NZOL2)+RZOL2*(PSIHTB(NZOL2+1)-PSIHTB(NZOL2))
653
654	!---LIMIT PSIH AND PSIM IN THE CASE OF THIN LAYERS AND HIGH ROUGHNESS
655	!--- THIS PREVENTS DENOMINATOR IN FLUXES FROM GETTING TOO SMALL
656	! PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I))
657	! PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I))
658	PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I))
659	PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I))
660	PSIH2(I)=AMIN1(PSIH2(I),0.9*GZ2OZ0(I))
661	PSIM10(I)=AMIN1(PSIM10(I),0.9*GZ10OZ0(I))
662	! AHW: mods to compute ck, cd
663	PSIH10(I)=AMIN1(PSIH10(I),0.9*GZ10OZ0(I))
664
665	RMOL(I) = ZOL(I)/ZA(I)
666
667	320 CONTINUE
668	!
669	!-----COMPUTE THE FRICTIONAL VELOCITY:
670	! ZA(1982) EQS(2.60),(2.61).
671	!
672	DO 330 I=its,ite
673	DTG=THX(I)-THGB(I)
674	PSIX=GZ1OZ0(I)-PSIM(I)
675	PSIX10=GZ10OZ0(I)-PSIM10(I)
676	! LOWER LIMIT ADDED TO PREVENT LARGE FLHC IN SOIL MODEL
677	! ACTIVATES IN UNSTABLE CONDITIONS WITH THIN LAYERS OR HIGH Z0
678	PSIT=AMAX1(GZ1OZ0(I)-PSIH(I),2.)
679
680	IF((XLAND(I)-1.5).GE.0)THEN
681	ZL=ZNT(I)
682	ELSE
683	ZL=0.01
684	ENDIF
685	PSIQ=ALOG(KARMANUST(I)ZA(I)/XKA+ZA(I)/ZL)-PSIH(I)
686	PSIT2=GZ2OZ0(I)-PSIH2(I)
687	PSIQ2=ALOG(KARMANUST(I)2./XKA+2./ZL)-PSIH2(I)
688	! AHW: mods to compute ck, cd
689	PSIQ10=ALOG(KARMANUST(I)10./XKA+10./ZL)-PSIH10(I)
690	IF ( PRESENT(ISFTCFLX) ) THEN
691	IF ( ISFTCFLX.EQ.1 .AND. (XLAND(I)-1.5).GE.0. ) THEN
692	Z0Q = 1.e-4 + 1.e-3(MAX(0.,UST(I)-1.))*2
693	! Z0Q = 0.621.5E-5/UST(I) + 1.E-3(MAX(0.,UST(I)-1.))**2
694	PSIQ=ALOG(ZA(I)/Z0Q)-PSIH(I)
695	PSIT=PSIQ
696	PSIQ2=ALOG(2./Z0Q)-PSIH2(I)
697	PSIQ10=ALOG(10./Z0Q)-PSIH10(I)
698	PSIT2=PSIQ2
699	ENDIF
700	ENDIF
701	IF(PRESENT(ck) .and. PRESENT(cd) .and. PRESENT(cka) .and. PRESENT(cda)) THEN
702	Ck(I)=(karman/psix10)*(karman/psiq10)
703	Cd(I)=(karman/psix10)*(karman/psix10)
704	Cka(I)=(karman/psix)*(karman/psiq)
705	Cda(I)=(karman/psix)*(karman/psix)
706	ENDIF
707	! TO PREVENT OSCILLATIONS AVERAGE WITH OLD VALUE
708	UST(I)=0.5UST(I)+0.5KARMAN*WSPD(I)/PSIX
709	! TKE coupling: compute ust without vconv for use in tke scheme
710	WSPDI(I)=SQRT(UX(I)UX(I)+VX(I)VX(I))
711	IF ( PRESENT(USTM) ) THEN
712	USTM(I)=0.5USTM(I)+0.5KARMAN*WSPDI(I)/PSIX
713	ENDIF
714	U10(I)=UX(I)*PSIX10/PSIX
715	V10(I)=VX(I)*PSIX10/PSIX
716	TH2(I)=THGB(I)+DTG*PSIT2/PSIT
717	Q2(I)=QSFC(I)+(QX(I)-QSFC(I))*PSIQ2/PSIQ
718	! T2(I) = TH2(I)(PSFC(I)/100.)*ROVCP
719	T2(I) = TH2(I)(PSFCPA(I)/P1000mb)*ROVCP
720	! LATER Q2 WILL BE OVERWRITTEN FOR LAND POINTS IN SURFCE
721	! QA2(I,J) = Q2(I)
722	! UA10(I,J) = U10(I)
723	! VA10(I,J) = V10(I)
724	! write(,1002)UST(I),KARMANWSPD(I),PSIX,KARMAN*WSPD(I)/PSIX
725	!
726	IF(PRESENT(uratx) .and. PRESENT(vratx) .and. PRESENT(tratx))THEN
727	IF(ABS(U10(I)) .GT. 1.E-10) THEN
728	uratx(I) = UX(I)/U10(I)
729	ELSE
730	uratx(I) = 1.2
731	END IF
732	IF(ABS(V10(I)) .GT. 1.E-10) THEN
733	vratx(I) = VX(I)/V10(I)
734	ELSE
735	vratx(I) = 1.2
736	END IF
737	tratx(I) = THX(I)/TH2(I)
738	ENDIF
739
740	IF((XLAND(I)-1.5).LT.0.)THEN
741	UST(I)=AMAX1(UST(I),0.1)
742	ENDIF
743	MOL(I)=KARMAN*DTG/PSIT/PRT
744	DENOMQ(I)=PSIQ
745	330 CONTINUE
746	!
747	335 CONTINUE
748
749	!-----COMPUTE THE SURFACE SENSIBLE AND LATENT HEAT FLUXES:
750
751	DO i=its,ite
752	QFX(i)=0.
753	HFX(i)=0.
754	ENDDO
755
756	IF (ISFFLX.EQ.0) GOTO 410
757
758	!-----OVER WATER, ALTER ROUGHNESS LENGTH (ZNT) ACCORDING TO WIND (UST).
759
760	DO 360 I=its,ite
761	IF((XLAND(I)-1.5).GE.0)THEN
762	ZNT(I)=CZOUST(I)UST(I)/G+OZO
763	! AHW: change roughness length, and hence the drag coefficients Ck and Cd
764	IF ( PRESENT(ISFTCFLX) ) THEN
765	IF ( ISFTCFLX.EQ.1 ) THEN
766	ZNT(I)=10.exp(-9.UST(I)**(-.3333))
767	ZNT(I)=MIN(ZNT(I),2.85e-3)
768	ZNT(I)=ZNT(I) + 0.11*1.5E-5/AMAX1(UST(I),0.01)
769	! ZNT(I)=MAX(ZNT(I),1.27e-7)
770	ENDIF
771	ENDIF
772	ZL = ZNT(I)
773	ELSE
774	ZL = 0.01
775	ENDIF
776	FLQC(I)=RHOX(I)MAVAIL(I)UST(I)*KARMAN/DENOMQ(I)
777	! FLQC(I)=RHOX(I)MAVAIL(I)UST(I)*KARMAN/( &
778	! ALOG(KARMANUST(I)ZA(I)/XKA+ZA(I)/ZL)-PSIH(I))
779	DTTHX=ABS(THX(I)-THGB(I))
780	IF(DTTHX.GT.1.E-5)THEN
781	FLHC(I)=CPM(I)RHOX(I)UST(I)*MOL(I)/(THX(I)-THGB(I))
782	! write(*,1001)FLHC(I),CPM(I),RHOX(I),UST(I),MOL(I),THX(I),THGB(I),I
783	1001 format(f8.5,2x,f12.7,2x,f12.10,2x,f12.10,2x,f13.10,2x,f12.8,f12.8,2x,i3)
784	ELSE
785	FLHC(I)=0.
786	ENDIF
787	360 CONTINUE
788
789	!
790	!-----COMPUTE SURFACE MOIST FLUX:
791	!
792	! IF(IDRY.EQ.1)GOTO 390
793	!
794	DO 370 I=its,ite
795	QFX(I)=FLQC(I)*(QSFC(I)-QX(I))
796	QFX(I)=AMAX1(QFX(I),0.)
797	LH(I)=XLV*QFX(I)
798	370 CONTINUE
799
800	!-----COMPUTE SURFACE HEAT FLUX:
801	!
802	390 CONTINUE
803	DO 400 I=its,ite
804	IF(XLAND(I)-1.5.GT.0.)THEN
805	HFX(I)=FLHC(I)*(THGB(I)-THX(I))
806	ELSEIF(XLAND(I)-1.5.LT.0.)THEN
807	HFX(I)=FLHC(I)*(THGB(I)-THX(I))
808	HFX(I)=AMAX1(HFX(I),-250.)
809	ENDIF
810	400 CONTINUE
811
812	DO I=its,ite
813	IF((XLAND(I)-1.5).GE.0)THEN
814	ZL=ZNT(I)
815	ELSE
816	ZL=0.01
817	ENDIF
818	CHS(I)=UST(I)KARMAN/(ALOG(KARMANUST(I)*ZA(I) &
819	/XKA+ZA(I)/ZL)-PSIH(I))
820	! GZ2OZ0(I)=ALOG(2./ZNT(I))
821	! PSIM2(I)=-10.*GZ2OZ0(I)
822	! PSIM2(I)=AMAX1(PSIM2(I),-10.)
823	! PSIH2(I)=PSIM2(I)
824	CQS2(I)=UST(I)KARMAN/(ALOG(KARMANUST(I)*2.0 &
825	/XKA+2.0/ZL)-PSIH2(I))
826	CHS2(I)=UST(I)*KARMAN/(GZ2OZ0(I)-PSIH2(I))
827	ENDDO
828
829	410 CONTINUE
830	!jdf
831	! DO I=its,ite
832	! IF(UST(I).GE.0.1) THEN
833	! RMOL(I)=RMOL(I)(-FLHC(I))/(UST(I)UST(I)*UST(I))
834	! ELSE
835	! RMOL(I)=RMOL(I)(-FLHC(I))/(0.10.1*0.1)
836	! ENDIF
837	! ENDDO
838	!jdf
839
840	!
841	END SUBROUTINE SFCLAY1D
842
843	!====================================================================
844	SUBROUTINE sfclayinit( allowed_to_read )
845
846	LOGICAL , INTENT(IN) :: allowed_to_read
847	INTEGER :: N
848	REAL :: ZOLN,X,Y
849
850	DO N=0,1000
851	ZOLN=-FLOAT(N)*0.01
852	X=(1-16.ZOLN)*0.25
853	PSIMTB(N)=2ALOG(0.5(1+X))+ALOG(0.5(1+XX))- &
854	2.ATAN(X)+2.ATAN(1.)
855	Y=(1-16ZOLN)*0.5
856	PSIHTB(N)=2ALOG(0.5(1+Y))
857	ENDDO
858
859	END SUBROUTINE sfclayinit
860
861	!-------------------------------------------------------------------
862
863	END MODULE module_sf_sfclay

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