1 | SUBROUTINE SWCLR & |
---|
2 | &( KIDIA , KFDIA , KLON , KLEV , KAER , KNU & |
---|
3 | &, PAER , PALBP , PDSIG , PRAYL , PSEC & |
---|
4 | &, PCGAZ , PPIZAZ, PRAY1 , PRAY2 , PREFZ , PRJ & |
---|
5 | &, PRK , PRMU0 , PTAUAZ, PTRA1 , PTRA2 , PTRCLR & |
---|
6 | &) |
---|
7 | |
---|
8 | !**** *SWCLR* - CLEAR-SKY COLUMN COMPUTATIONS |
---|
9 | |
---|
10 | ! PURPOSE. |
---|
11 | ! -------- |
---|
12 | ! COMPUTES THE REFLECTIVITY AND TRANSMISSIVITY IN CASE OF |
---|
13 | ! CLEAR-SKY COLUMN |
---|
14 | |
---|
15 | !** INTERFACE. |
---|
16 | ! ---------- |
---|
17 | |
---|
18 | ! *SWCLR* IS CALLED EITHER FROM *SW1S* |
---|
19 | ! OR FROM *SWNI* |
---|
20 | |
---|
21 | ! IMPLICIT ARGUMENTS : |
---|
22 | ! -------------------- |
---|
23 | |
---|
24 | ! ==== INPUTS === |
---|
25 | ! ==== OUTPUTS === |
---|
26 | |
---|
27 | ! METHOD. |
---|
28 | ! ------- |
---|
29 | |
---|
30 | |
---|
31 | ! EXTERNALS. |
---|
32 | ! ---------- |
---|
33 | |
---|
34 | ! NONE |
---|
35 | |
---|
36 | ! REFERENCE. |
---|
37 | ! ---------- |
---|
38 | |
---|
39 | ! SEE RADIATION'S PART OF THE ECMWF RESEARCH DEPARTMENT |
---|
40 | ! DOCUMENTATION, AND FOUQUART AND BONNEL (1980) |
---|
41 | |
---|
42 | ! AUTHOR. |
---|
43 | ! ------- |
---|
44 | ! JEAN-JACQUES MORCRETTE *ECMWF* |
---|
45 | |
---|
46 | ! MODIFICATIONS. |
---|
47 | ! -------------- |
---|
48 | ! ORIGINAL : 94-11-15 |
---|
49 | ! Modified : 96-03-19 JJM-PhD (loop 107 in absence of aerosols) |
---|
50 | ! JJMorcrette 990128 : sunshine duration |
---|
51 | ! JJMorcrette 990128 : sunshine duration |
---|
52 | ! 99-05-25 JJMorcrette Revised aerosols |
---|
53 | ! JJMorcrette 001218 : 6 spectral intervals |
---|
54 | |
---|
55 | ! ------------------------------------------------------------------ |
---|
56 | |
---|
57 | |
---|
58 | #include "tsmbkind.h" |
---|
59 | |
---|
60 | USE YOESW , ONLY : RTAUA ,RPIZA ,RCGA |
---|
61 | USE YOERAD , ONLY : NOVLP ,NSW |
---|
62 | USE YOERDI , ONLY : REPCLC |
---|
63 | USE YOERDU , ONLY : REPSCT |
---|
64 | |
---|
65 | |
---|
66 | IMPLICIT NONE |
---|
67 | |
---|
68 | |
---|
69 | ! DUMMY INTEGER SCALARS |
---|
70 | INTEGER_M :: KAER |
---|
71 | INTEGER_M :: KFDIA |
---|
72 | INTEGER_M :: KIDIA |
---|
73 | INTEGER_M :: KLEV |
---|
74 | INTEGER_M :: KLON |
---|
75 | INTEGER_M :: KNU |
---|
76 | |
---|
77 | |
---|
78 | |
---|
79 | ! ------------------------------------------------------------------ |
---|
80 | |
---|
81 | !* 0.1 ARGUMENTS |
---|
82 | ! --------- |
---|
83 | |
---|
84 | REAL_B :: PAER(KLON,6,KLEV), PALBP(KLON,NSW)& |
---|
85 | &, PDSIG(KLON,KLEV)& |
---|
86 | &, PRAYL(KLON)& |
---|
87 | &, PSEC(KLON) |
---|
88 | |
---|
89 | REAL_B ::& |
---|
90 | &PCGAZ(KLON,KLEV) & |
---|
91 | &, PPIZAZ(KLON,KLEV)& |
---|
92 | &, PRAY1(KLON,KLEV+1) , PRAY2(KLON,KLEV+1)& |
---|
93 | &, PREFZ(KLON,2,KLEV+1), PRJ(KLON,6,KLEV+1)& |
---|
94 | &, PRK(KLON,6,KLEV+1) , PRMU0(KLON,KLEV+1)& |
---|
95 | &, PTAUAZ(KLON,KLEV)& |
---|
96 | &, PTRA1(KLON,KLEV+1) , PTRA2(KLON,KLEV+1)& |
---|
97 | &, PTRCLR(KLON) |
---|
98 | |
---|
99 | ! ------------------------------------------------------------------ |
---|
100 | |
---|
101 | !* 0.2 LOCAL ARRAYS |
---|
102 | ! ------------ |
---|
103 | |
---|
104 | REAL_B :: ZC0I(KLON,KLEV+1)& |
---|
105 | &, ZCLE0(KLON,KLEV), ZCLEAR(KLON) & |
---|
106 | &, ZR21(KLON)& |
---|
107 | &, ZR23(KLON) , ZSS0(KLON) , ZSCAT(KLON)& |
---|
108 | &, ZTR(KLON,2,KLEV+1) |
---|
109 | |
---|
110 | ! LOCAL INTEGER SCALARS |
---|
111 | INTEGER_M :: IKL, JA, JAE, JAJ, JK, JKL, JKLP1, JKM1, JL, INU1 |
---|
112 | |
---|
113 | ! LOCAL REAL SCALARS |
---|
114 | REAL_B :: ZBMU0, ZBMU1, ZCORAE, ZDEN, ZDEN1, ZFACOA,& |
---|
115 | &ZFF, ZGAP, ZGAR, ZMU1, ZMUE, ZRATIO, ZRE11, & |
---|
116 | &ZTO, ZTRAY, ZWW |
---|
117 | |
---|
118 | |
---|
119 | ! ------------------------------------------------------------------ |
---|
120 | |
---|
121 | !* 1. OPTICAL PARAMETERS FOR AEROSOLS AND RAYLEIGH |
---|
122 | ! -------------------------------------------- |
---|
123 | |
---|
124 | |
---|
125 | DO JK = 1 , KLEV+1 |
---|
126 | DO JA = 1 , 6 |
---|
127 | DO JL = KIDIA,KFDIA |
---|
128 | PRJ(JL,JA,JK) = _ZERO_ |
---|
129 | PRK(JL,JA,JK) = _ZERO_ |
---|
130 | ENDDO |
---|
131 | ENDDO |
---|
132 | ENDDO |
---|
133 | |
---|
134 | ! ------ NB: 'PAER' AEROSOLS ARE ENTERED FROM TOP TO BOTTOM |
---|
135 | |
---|
136 | DO JK = 1 , KLEV |
---|
137 | IKL=KLEV+1-JK |
---|
138 | DO JL = KIDIA,KFDIA |
---|
139 | PCGAZ(JL,JK) = _ZERO_ |
---|
140 | PPIZAZ(JL,JK) = _ZERO_ |
---|
141 | PTAUAZ(JL,JK) = _ZERO_ |
---|
142 | ENDDO |
---|
143 | DO JAE=1,6 |
---|
144 | DO JL = KIDIA,KFDIA |
---|
145 | PTAUAZ(JL,JK)=PTAUAZ(JL,JK)+PAER(JL, JAE, IKL)*RTAUA(KNU,JAE) |
---|
146 | PPIZAZ(JL,JK)=PPIZAZ(JL,JK)+PAER(JL, JAE, IKL)& |
---|
147 | &* RTAUA(KNU,JAE)*RPIZA(KNU,JAE) |
---|
148 | PCGAZ(JL,JK) = PCGAZ(JL,JK) +PAER(JL, JAE, IKL)& |
---|
149 | &* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)*RCGA(KNU,JAE) |
---|
150 | ENDDO |
---|
151 | ENDDO |
---|
152 | |
---|
153 | DO JL = KIDIA,KFDIA |
---|
154 | IF (KAER /= 0) THEN |
---|
155 | PCGAZ(JL,JK)=PCGAZ(JL,JK)/PPIZAZ(JL,JK) |
---|
156 | PPIZAZ(JL,JK)=PPIZAZ(JL,JK)/PTAUAZ(JL,JK) |
---|
157 | ZTRAY = PRAYL(JL) * PDSIG(JL,JK) |
---|
158 | ZRATIO = ZTRAY / (ZTRAY + PTAUAZ(JL,JK)) |
---|
159 | ZGAR = PCGAZ(JL,JK) |
---|
160 | ZFF = ZGAR * ZGAR |
---|
161 | PTAUAZ(JL,JK)=ZTRAY+PTAUAZ(JL,JK)*(_ONE_-PPIZAZ(JL,JK)*ZFF) |
---|
162 | PCGAZ(JL,JK) = ZGAR * (_ONE_ - ZRATIO) / (_ONE_ + ZGAR) |
---|
163 | PPIZAZ(JL,JK) =ZRATIO+(_ONE_-ZRATIO)*PPIZAZ(JL,JK)*(_ONE_-ZFF)& |
---|
164 | &/ (_ONE_ - PPIZAZ(JL,JK) * ZFF) |
---|
165 | ELSE |
---|
166 | ZTRAY = PRAYL(JL) * PDSIG(JL,JK) |
---|
167 | PTAUAZ(JL,JK) = ZTRAY |
---|
168 | PCGAZ(JL,JK) = _ZERO_ |
---|
169 | PPIZAZ(JL,JK) = _ONE_-REPSCT |
---|
170 | ENDIF |
---|
171 | ENDDO |
---|
172 | ENDDO |
---|
173 | |
---|
174 | ! ------------------------------------------------------------------ |
---|
175 | |
---|
176 | !* 2. TOTAL EFFECTIVE CLOUDINESS ABOVE A GIVEN LEVEL |
---|
177 | ! ---------------------------------------------- |
---|
178 | |
---|
179 | |
---|
180 | DO JL = KIDIA,KFDIA |
---|
181 | ZR23(JL) = _ZERO_ |
---|
182 | ZC0I(JL,KLEV+1) = _ZERO_ |
---|
183 | ZCLEAR(JL) = _ONE_ |
---|
184 | ZSCAT(JL) = _ZERO_ |
---|
185 | ENDDO |
---|
186 | |
---|
187 | JK = 1 |
---|
188 | JKL = KLEV+1 - JK |
---|
189 | JKLP1 = JKL + 1 |
---|
190 | DO JL = KIDIA,KFDIA |
---|
191 | ZFACOA = _ONE_ - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) |
---|
192 | ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) |
---|
193 | ZR21(JL) = EXP(-ZCORAE ) |
---|
194 | ZSS0(JL) = _ONE_-ZR21(JL) |
---|
195 | ZCLE0(JL,JKL) = ZSS0(JL) |
---|
196 | |
---|
197 | IF (NOVLP == 1 .OR. NOVLP == 4) THEN |
---|
198 | !* maximum-random |
---|
199 | ZCLEAR(JL) = ZCLEAR(JL)& |
---|
200 | &*(_ONE_-MAX(ZSS0(JL),ZSCAT(JL)))& |
---|
201 | &/(_ONE_-MIN(ZSCAT(JL),_ONE_-REPCLC)) |
---|
202 | ZC0I(JL,JKL) = _ONE_ - ZCLEAR(JL) |
---|
203 | ZSCAT(JL) = ZSS0(JL) |
---|
204 | ELSEIF (NOVLP == 2) THEN |
---|
205 | !* maximum |
---|
206 | ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) ) |
---|
207 | ZC0I(JL,JKL) = ZSCAT(JL) |
---|
208 | ELSEIF (NOVLP == 3) THEN |
---|
209 | !* random |
---|
210 | ZCLEAR(JL)=ZCLEAR(JL)*(_ONE_-ZSS0(JL)) |
---|
211 | ZSCAT(JL) = _ONE_ - ZCLEAR(JL) |
---|
212 | ZC0I(JL,JKL) = ZSCAT(JL) |
---|
213 | ENDIF |
---|
214 | ENDDO |
---|
215 | |
---|
216 | DO JK = 2 , KLEV |
---|
217 | JKL = KLEV+1 - JK |
---|
218 | JKLP1 = JKL + 1 |
---|
219 | DO JL = KIDIA,KFDIA |
---|
220 | ZFACOA = _ONE_ - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) |
---|
221 | ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) |
---|
222 | ZR21(JL) = EXP(-ZCORAE ) |
---|
223 | ZSS0(JL) = _ONE_-ZR21(JL) |
---|
224 | ZCLE0(JL,JKL) = ZSS0(JL) |
---|
225 | |
---|
226 | IF (NOVLP == 1 .OR. NOVLP == 4) THEN |
---|
227 | !* maximum-random |
---|
228 | ZCLEAR(JL) = ZCLEAR(JL)& |
---|
229 | &*(_ONE_-MAX(ZSS0(JL),ZSCAT(JL)))& |
---|
230 | &/(_ONE_-MIN(ZSCAT(JL),_ONE_-REPCLC)) |
---|
231 | ZC0I(JL,JKL) = _ONE_ - ZCLEAR(JL) |
---|
232 | ZSCAT(JL) = ZSS0(JL) |
---|
233 | ELSEIF (NOVLP == 2) THEN |
---|
234 | !* maximum |
---|
235 | ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) ) |
---|
236 | ZC0I(JL,JKL) = ZSCAT(JL) |
---|
237 | ELSEIF (NOVLP == 3) THEN |
---|
238 | !* random |
---|
239 | ZCLEAR(JL)=ZCLEAR(JL)*(_ONE_-ZSS0(JL)) |
---|
240 | ZSCAT(JL) = _ONE_ - ZCLEAR(JL) |
---|
241 | ZC0I(JL,JKL) = ZSCAT(JL) |
---|
242 | ENDIF |
---|
243 | ENDDO |
---|
244 | ENDDO |
---|
245 | |
---|
246 | ! ------------------------------------------------------------------ |
---|
247 | |
---|
248 | !* 3. REFLECTIVITY/TRANSMISSIVITY FOR PURE SCATTERING |
---|
249 | ! ----------------------------------------------- |
---|
250 | |
---|
251 | |
---|
252 | DO JL = KIDIA,KFDIA |
---|
253 | PRAY1(JL,KLEV+1) = _ZERO_ |
---|
254 | PRAY2(JL,KLEV+1) = _ZERO_ |
---|
255 | PREFZ(JL,2,1) = PALBP(JL,KNU) |
---|
256 | PREFZ(JL,1,1) = PALBP(JL,KNU) |
---|
257 | PTRA1(JL,KLEV+1) = _ONE_ |
---|
258 | PTRA2(JL,KLEV+1) = _ONE_ |
---|
259 | ENDDO |
---|
260 | |
---|
261 | DO JK = 2 , KLEV+1 |
---|
262 | JKM1 = JK-1 |
---|
263 | DO JL = KIDIA,KFDIA |
---|
264 | |
---|
265 | |
---|
266 | ! ------------------------------------------------------------------ |
---|
267 | |
---|
268 | !* 3.1 EQUIVALENT ZENITH ANGLE |
---|
269 | ! ----------------------- |
---|
270 | |
---|
271 | |
---|
272 | ZMUE = (_ONE_-ZC0I(JL,JK)) * PSEC(JL)+ ZC0I(JL,JK) * 1.66_JPRB |
---|
273 | PRMU0(JL,JK) = _ONE_/ZMUE |
---|
274 | |
---|
275 | |
---|
276 | ! ------------------------------------------------------------------ |
---|
277 | |
---|
278 | !* 3.2 REFLECT./TRANSMISSIVITY DUE TO RAYLEIGH AND AEROSOLS |
---|
279 | ! ---------------------------------------------------- |
---|
280 | |
---|
281 | |
---|
282 | ZGAP = PCGAZ(JL,JKM1) |
---|
283 | ZBMU0 = _HALF_ - 0.75_JPRB * ZGAP / ZMUE |
---|
284 | ZWW = PPIZAZ(JL,JKM1) |
---|
285 | ZTO = PTAUAZ(JL,JKM1) |
---|
286 | ZDEN = _ONE_ + (_ONE_ - ZWW + ZBMU0 * ZWW) * ZTO * ZMUE & |
---|
287 | &+ (1-ZWW) * (_ONE_ - ZWW +_TWO_*ZBMU0*ZWW)*ZTO*ZTO*ZMUE*ZMUE |
---|
288 | PRAY1(JL,JKM1) = ZBMU0 * ZWW * ZTO * ZMUE / ZDEN |
---|
289 | PTRA1(JL,JKM1) = _ONE_ / ZDEN |
---|
290 | |
---|
291 | ZMU1 = _HALF_ |
---|
292 | ZBMU1 = _HALF_ - 0.75_JPRB * ZGAP * ZMU1 |
---|
293 | ZDEN1= _ONE_ + (_ONE_ - ZWW + ZBMU1 * ZWW) * ZTO / ZMU1 & |
---|
294 | &+ (1-ZWW) * (_ONE_ - ZWW +_TWO_*ZBMU1*ZWW)*ZTO*ZTO/ZMU1/ZMU1 |
---|
295 | PRAY2(JL,JKM1) = ZBMU1 * ZWW * ZTO / ZMU1 / ZDEN1 |
---|
296 | PTRA2(JL,JKM1) = _ONE_ / ZDEN1 |
---|
297 | |
---|
298 | |
---|
299 | |
---|
300 | PREFZ(JL,1,JK) = (PRAY1(JL,JKM1)& |
---|
301 | &+ PREFZ(JL,1,JKM1) * PTRA1(JL,JKM1)& |
---|
302 | &* PTRA2(JL,JKM1)& |
---|
303 | &/ (_ONE_-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
---|
304 | |
---|
305 | ZTR(JL,1,JKM1) = (PTRA1(JL,JKM1)& |
---|
306 | &/ (_ONE_-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
---|
307 | |
---|
308 | PREFZ(JL,2,JK) = (PRAY1(JL,JKM1)& |
---|
309 | &+ PREFZ(JL,2,JKM1) * PTRA1(JL,JKM1)& |
---|
310 | &* PTRA2(JL,JKM1) ) |
---|
311 | |
---|
312 | ZTR(JL,2,JKM1) = PTRA1(JL,JKM1) |
---|
313 | |
---|
314 | ENDDO |
---|
315 | ENDDO |
---|
316 | DO JL = KIDIA,KFDIA |
---|
317 | ZMUE = (_ONE_-ZC0I(JL,1))*PSEC(JL)+ZC0I(JL,1)*1.66_JPRB |
---|
318 | PRMU0(JL,1)=_ONE_/ZMUE |
---|
319 | PTRCLR(JL)=_ONE_-ZC0I(JL,1) |
---|
320 | ENDDO |
---|
321 | |
---|
322 | |
---|
323 | ! ------------------------------------------------------------------ |
---|
324 | |
---|
325 | !* 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL |
---|
326 | ! ------------------------------------------------- |
---|
327 | |
---|
328 | IF (NSW <= 4) THEN |
---|
329 | INU1=1 |
---|
330 | ELSE IF (NSW == 6) THEN |
---|
331 | INU1=3 |
---|
332 | END IF |
---|
333 | |
---|
334 | IF (KNU <= INU1) THEN |
---|
335 | JAJ = 2 |
---|
336 | DO JL = KIDIA,KFDIA |
---|
337 | PRJ(JL,JAJ,KLEV+1) = _ONE_ |
---|
338 | PRK(JL,JAJ,KLEV+1) = PREFZ(JL, 1,KLEV+1) |
---|
339 | ENDDO |
---|
340 | |
---|
341 | DO JK = 1 , KLEV |
---|
342 | JKL = KLEV+1 - JK |
---|
343 | JKLP1 = JKL + 1 |
---|
344 | DO JL = KIDIA,KFDIA |
---|
345 | ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL, 1,JKL) |
---|
346 | PRJ(JL,JAJ,JKL) = ZRE11 |
---|
347 | PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL, 1,JKL) |
---|
348 | ENDDO |
---|
349 | ENDDO |
---|
350 | |
---|
351 | ELSE |
---|
352 | |
---|
353 | DO JAJ = 1 , 2 |
---|
354 | DO JL = KIDIA,KFDIA |
---|
355 | PRJ(JL,JAJ,KLEV+1) = _ONE_ |
---|
356 | PRK(JL,JAJ,KLEV+1) = PREFZ(JL,JAJ,KLEV+1) |
---|
357 | ENDDO |
---|
358 | |
---|
359 | DO JK = 1 , KLEV |
---|
360 | JKL = KLEV+1 - JK |
---|
361 | JKLP1 = JKL + 1 |
---|
362 | DO JL = KIDIA,KFDIA |
---|
363 | ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL,JAJ,JKL) |
---|
364 | PRJ(JL,JAJ,JKL) = ZRE11 |
---|
365 | PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL,JAJ,JKL) |
---|
366 | ENDDO |
---|
367 | ENDDO |
---|
368 | ENDDO |
---|
369 | |
---|
370 | ENDIF |
---|
371 | |
---|
372 | ! ------------------------------------------------------------------ |
---|
373 | |
---|
374 | RETURN |
---|
375 | END SUBROUTINE SWCLR |
---|