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guez |
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SUBROUTINE LWC(KLIM,PCLDLD,PCLDLU,PEMIS,PFLUC, |
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R PBINT,PBSUIN,PCTS,PCNTRB, |
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S PFLUX) |
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use dimens_m |
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use dimphy |
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use raddim |
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use radepsi |
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use radopt |
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IMPLICIT none |
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C |
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C PURPOSE. |
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C -------- |
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C INTRODUCES CLOUD EFFECTS ON LONGWAVE FLUXES OR |
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C RADIANCES |
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C |
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C EXPLICIT ARGUMENTS : |
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C -------------------- |
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C ==== INPUTS === |
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C PBINT : (KDLON,0:KFLEV) ; HALF LEVEL PLANCK FUNCTION |
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C PBSUIN : (KDLON) ; SURFACE PLANCK FUNCTION |
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C PCLDLD : (KDLON,KFLEV) ; DOWNWARD EFFECTIVE CLOUD FRACTION |
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C PCLDLU : (KDLON,KFLEV) ; UPWARD EFFECTIVE CLOUD FRACTION |
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C PCNTRB : (KDLON,KFLEV+1,KFLEV+1); CLEAR-SKY ENERGY EXCHANGE |
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C PCTS : (KDLON,KFLEV) ; CLEAR-SKY LAYER COOLING-TO-SPACE |
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C PEMIS : (KDLON) ; SURFACE EMISSIVITY |
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C PFLUC |
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C ==== OUTPUTS === |
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C PFLUX(KDLON,2,KFLEV) ; RADIATIVE FLUXES : |
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C 1 ==> UPWARD FLUX TOTAL |
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C 2 ==> DOWNWARD FLUX TOTAL |
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C |
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C METHOD. |
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C ------- |
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C |
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C 1. INITIALIZES ALL FLUXES TO CLEAR-SKY VALUES |
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C 2. EFFECT OF ONE OVERCAST UNITY EMISSIVITY CLOUD LAYER |
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C 3. EFFECT OF SEMI-TRANSPARENT, PARTIAL OR MULTI-LAYERED |
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C CLOUDS |
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C |
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C REFERENCE. |
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C ---------- |
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C |
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C SEE RADIATION'S PART OF THE MODEL'S DOCUMENTATION AND |
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C ECMWF RESEARCH DEPARTMENT DOCUMENTATION OF THE IFS |
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C |
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C AUTHOR. |
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C ------- |
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C JEAN-JACQUES MORCRETTE *ECMWF* |
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C |
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C MODIFICATIONS. |
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C -------------- |
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C ORIGINAL : 89-07-14 |
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C Voigt lines (loop 231 to 233) - JJM & PhD - 01/96 |
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C----------------------------------------------------------------------- |
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C* ARGUMENTS: |
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INTEGER klim |
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REAL*8 PFLUC(KDLON,2,KFLEV+1) ! CLEAR-SKY RADIATIVE FLUXES |
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REAL*8 PBINT(KDLON,KFLEV+1) ! HALF LEVEL PLANCK FUNCTION |
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REAL*8 PBSUIN(KDLON) ! SURFACE PLANCK FUNCTION |
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REAL*8 PCNTRB(KDLON,KFLEV+1,KFLEV+1) !CLEAR-SKY ENERGY EXCHANGE |
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REAL*8 PCTS(KDLON,KFLEV) ! CLEAR-SKY LAYER COOLING-TO-SPACE |
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c |
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REAL*8 PCLDLD(KDLON,KFLEV) |
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REAL*8 PCLDLU(KDLON,KFLEV) |
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REAL*8 PEMIS(KDLON) |
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C |
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REAL*8 PFLUX(KDLON,2,KFLEV+1) |
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C----------------------------------------------------------------------- |
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C* LOCAL VARIABLES: |
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INTEGER IMX(KDLON), IMXP(KDLON) |
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C |
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REAL*8 ZCLEAR(KDLON),ZCLOUD(KDLON),ZDNF(KDLON,KFLEV+1,KFLEV+1) |
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S , ZFD(KDLON), ZFN10(KDLON), ZFU(KDLON) |
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S , ZUPF(KDLON,KFLEV+1,KFLEV+1) |
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REAL*8 ZCLM(KDLON,KFLEV+1,KFLEV+1) |
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C |
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INTEGER jk, jl, imaxc, imx1, imx2, jkj, jkp1, jkm1 |
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INTEGER jk1, jk2, jkc, jkcp1, jcloud |
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INTEGER imxm1, imxp1 |
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REAL*8 zcfrac |
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C ------------------------------------------------------------------ |
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C |
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C* 1. INITIALIZATION |
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C -------------- |
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C |
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100 CONTINUE |
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C |
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IMAXC = 0 |
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C |
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DO 101 JL = 1, KDLON |
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IMX(JL)=0 |
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IMXP(JL)=0 |
93 |
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ZCLOUD(JL) = 0. |
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101 CONTINUE |
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C |
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C* 1.1 SEARCH THE LAYER INDEX OF THE HIGHEST CLOUD |
97 |
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C ------------------------------------------- |
98 |
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C |
99 |
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110 CONTINUE |
100 |
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C |
101 |
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DO 112 JK = 1 , KFLEV |
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DO 111 JL = 1, KDLON |
103 |
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IMX1=IMX(JL) |
104 |
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IMX2=JK |
105 |
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IF (PCLDLU(JL,JK).GT.ZEPSC) THEN |
106 |
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IMXP(JL)=IMX2 |
107 |
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ELSE |
108 |
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IMXP(JL)=IMX1 |
109 |
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END IF |
110 |
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IMAXC=MAX(IMXP(JL),IMAXC) |
111 |
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IMX(JL)=IMXP(JL) |
112 |
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111 CONTINUE |
113 |
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112 CONTINUE |
114 |
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CGM******* |
115 |
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IMAXC=KFLEV |
116 |
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CGM******* |
117 |
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C |
118 |
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DO 114 JK = 1 , KFLEV+1 |
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DO 113 JL = 1, KDLON |
120 |
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PFLUX(JL,1,JK) = PFLUC(JL,1,JK) |
121 |
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PFLUX(JL,2,JK) = PFLUC(JL,2,JK) |
122 |
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113 CONTINUE |
123 |
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114 CONTINUE |
124 |
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C |
125 |
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C ------------------------------------------------------------------ |
126 |
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C |
127 |
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C* 2. EFFECT OF CLOUDINESS ON LONGWAVE FLUXES |
128 |
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C --------------------------------------- |
129 |
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C |
130 |
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IF (IMAXC.GT.0) THEN |
131 |
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C |
132 |
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IMXP1 = IMAXC + 1 |
133 |
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IMXM1 = IMAXC - 1 |
134 |
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C |
135 |
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C* 2.0 INITIALIZE TO CLEAR-SKY FLUXES |
136 |
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C ------------------------------ |
137 |
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C |
138 |
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200 CONTINUE |
139 |
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C |
140 |
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DO 203 JK1=1,KFLEV+1 |
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DO 202 JK2=1,KFLEV+1 |
142 |
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DO 201 JL = 1, KDLON |
143 |
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ZUPF(JL,JK2,JK1)=PFLUC(JL,1,JK1) |
144 |
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ZDNF(JL,JK2,JK1)=PFLUC(JL,2,JK1) |
145 |
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201 CONTINUE |
146 |
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202 CONTINUE |
147 |
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203 CONTINUE |
148 |
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C |
149 |
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C* 2.1 FLUXES FOR ONE OVERCAST UNITY EMISSIVITY CLOUD |
150 |
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C ---------------------------------------------- |
151 |
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C |
152 |
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210 CONTINUE |
153 |
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C |
154 |
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DO 213 JKC = 1 , IMAXC |
155 |
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JCLOUD=JKC |
156 |
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JKCP1=JCLOUD+1 |
157 |
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C |
158 |
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C* 2.1.1 ABOVE THE CLOUD |
159 |
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C --------------- |
160 |
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C |
161 |
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2110 CONTINUE |
162 |
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C |
163 |
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DO 2115 JK=JKCP1,KFLEV+1 |
164 |
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JKM1=JK-1 |
165 |
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DO 2111 JL = 1, KDLON |
166 |
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ZFU(JL)=0. |
167 |
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2111 CONTINUE |
168 |
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IF (JK .GT. JKCP1) THEN |
169 |
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DO 2113 JKJ=JKCP1,JKM1 |
170 |
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DO 2112 JL = 1, KDLON |
171 |
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ZFU(JL) = ZFU(JL) + PCNTRB(JL,JK,JKJ) |
172 |
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2112 CONTINUE |
173 |
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2113 CONTINUE |
174 |
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END IF |
175 |
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C |
176 |
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DO 2114 JL = 1, KDLON |
177 |
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ZUPF(JL,JKCP1,JK)=PBINT(JL,JK)-ZFU(JL) |
178 |
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2114 CONTINUE |
179 |
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2115 CONTINUE |
180 |
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C |
181 |
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C* 2.1.2 BELOW THE CLOUD |
182 |
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C --------------- |
183 |
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C |
184 |
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2120 CONTINUE |
185 |
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C |
186 |
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DO 2125 JK=1,JCLOUD |
187 |
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JKP1=JK+1 |
188 |
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DO 2121 JL = 1, KDLON |
189 |
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ZFD(JL)=0. |
190 |
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2121 CONTINUE |
191 |
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C |
192 |
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IF (JK .LT. JCLOUD) THEN |
193 |
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DO 2123 JKJ=JKP1,JCLOUD |
194 |
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DO 2122 JL = 1, KDLON |
195 |
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ZFD(JL) = ZFD(JL) + PCNTRB(JL,JK,JKJ) |
196 |
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2122 CONTINUE |
197 |
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2123 CONTINUE |
198 |
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END IF |
199 |
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DO 2124 JL = 1, KDLON |
200 |
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ZDNF(JL,JKCP1,JK)=-PBINT(JL,JK)-ZFD(JL) |
201 |
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2124 CONTINUE |
202 |
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2125 CONTINUE |
203 |
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C |
204 |
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213 CONTINUE |
205 |
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C |
206 |
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C |
207 |
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C* 2.2 CLOUD COVER MATRIX |
208 |
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C ------------------ |
209 |
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C |
210 |
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C* ZCLM(JK1,JK2) IS THE OBSCURATION FACTOR BY CLOUD LAYERS BETWEEN |
211 |
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C HALF-LEVELS JK1 AND JK2 AS SEEN FROM JK1 |
212 |
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C |
213 |
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220 CONTINUE |
214 |
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C |
215 |
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DO 223 JK1 = 1 , KFLEV+1 |
216 |
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DO 222 JK2 = 1 , KFLEV+1 |
217 |
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DO 221 JL = 1, KDLON |
218 |
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ZCLM(JL,JK1,JK2) = 0. |
219 |
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221 CONTINUE |
220 |
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222 CONTINUE |
221 |
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223 CONTINUE |
222 |
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C |
223 |
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C |
224 |
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C |
225 |
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C* 2.4 CLOUD COVER BELOW THE LEVEL OF CALCULATION |
226 |
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C ------------------------------------------ |
227 |
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C |
228 |
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240 CONTINUE |
229 |
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C |
230 |
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DO 244 JK1 = 2 , KFLEV+1 |
231 |
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DO 241 JL = 1, KDLON |
232 |
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ZCLEAR(JL)=1. |
233 |
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ZCLOUD(JL)=0. |
234 |
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241 CONTINUE |
235 |
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DO 243 JK = JK1 - 1 , 1 , -1 |
236 |
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DO 242 JL = 1, KDLON |
237 |
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IF (NOVLP.EQ.1) THEN |
238 |
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c* maximum-random |
239 |
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ZCLEAR(JL)=ZCLEAR(JL)*(1.0-MAX(PCLDLU(JL,JK),ZCLOUD(JL))) |
240 |
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* /(1.0-MIN(ZCLOUD(JL),1.-ZEPSEC)) |
241 |
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ZCLM(JL,JK1,JK) = 1.0 - ZCLEAR(JL) |
242 |
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ZCLOUD(JL) = PCLDLU(JL,JK) |
243 |
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ELSE IF (NOVLP.EQ.2) THEN |
244 |
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c* maximum |
245 |
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ZCLOUD(JL) = MAX(ZCLOUD(JL) , PCLDLU(JL,JK)) |
246 |
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ZCLM(JL,JK1,JK) = ZCLOUD(JL) |
247 |
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ELSE IF (NOVLP.EQ.3) THEN |
248 |
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c* random |
249 |
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ZCLEAR(JL) = ZCLEAR(JL)*(1.0 - PCLDLU(JL,JK)) |
250 |
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ZCLOUD(JL) = 1.0 - ZCLEAR(JL) |
251 |
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ZCLM(JL,JK1,JK) = ZCLOUD(JL) |
252 |
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END IF |
253 |
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242 CONTINUE |
254 |
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243 CONTINUE |
255 |
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244 CONTINUE |
256 |
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C |
257 |
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C |
258 |
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C* 2.5 CLOUD COVER ABOVE THE LEVEL OF CALCULATION |
259 |
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C ------------------------------------------ |
260 |
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C |
261 |
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250 CONTINUE |
262 |
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C |
263 |
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DO 254 JK1 = 1 , KFLEV |
264 |
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DO 251 JL = 1, KDLON |
265 |
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ZCLEAR(JL)=1. |
266 |
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ZCLOUD(JL)=0. |
267 |
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251 CONTINUE |
268 |
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DO 253 JK = JK1 , KFLEV |
269 |
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DO 252 JL = 1, KDLON |
270 |
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IF (NOVLP.EQ.1) THEN |
271 |
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c* maximum-random |
272 |
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ZCLEAR(JL)=ZCLEAR(JL)*(1.0-MAX(PCLDLD(JL,JK),ZCLOUD(JL))) |
273 |
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* /(1.0-MIN(ZCLOUD(JL),1.-ZEPSEC)) |
274 |
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ZCLM(JL,JK1,JK) = 1.0 - ZCLEAR(JL) |
275 |
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ZCLOUD(JL) = PCLDLD(JL,JK) |
276 |
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ELSE IF (NOVLP.EQ.2) THEN |
277 |
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c* maximum |
278 |
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ZCLOUD(JL) = MAX(ZCLOUD(JL) , PCLDLD(JL,JK)) |
279 |
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ZCLM(JL,JK1,JK) = ZCLOUD(JL) |
280 |
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ELSE IF (NOVLP.EQ.3) THEN |
281 |
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c* random |
282 |
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ZCLEAR(JL) = ZCLEAR(JL)*(1.0 - PCLDLD(JL,JK)) |
283 |
|
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ZCLOUD(JL) = 1.0 - ZCLEAR(JL) |
284 |
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ZCLM(JL,JK1,JK) = ZCLOUD(JL) |
285 |
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END IF |
286 |
|
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252 CONTINUE |
287 |
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253 CONTINUE |
288 |
|
|
254 CONTINUE |
289 |
|
|
C |
290 |
|
|
C |
291 |
|
|
C |
292 |
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C* 3. FLUXES FOR PARTIAL/MULTIPLE LAYERED CLOUDINESS |
293 |
|
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C ---------------------------------------------- |
294 |
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|
C |
295 |
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300 CONTINUE |
296 |
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C |
297 |
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C* 3.1 DOWNWARD FLUXES |
298 |
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C --------------- |
299 |
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C |
300 |
|
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310 CONTINUE |
301 |
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C |
302 |
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DO 311 JL = 1, KDLON |
303 |
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PFLUX(JL,2,KFLEV+1) = 0. |
304 |
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311 CONTINUE |
305 |
|
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C |
306 |
|
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DO 317 JK1 = KFLEV , 1 , -1 |
307 |
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C |
308 |
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C* CONTRIBUTION FROM CLEAR-SKY FRACTION |
309 |
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|
C |
310 |
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DO 312 JL = 1, KDLON |
311 |
|
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ZFD (JL) = (1. - ZCLM(JL,JK1,KFLEV)) * ZDNF(JL,1,JK1) |
312 |
|
|
312 CONTINUE |
313 |
|
|
C |
314 |
|
|
C* CONTRIBUTION FROM ADJACENT CLOUD |
315 |
|
|
C |
316 |
|
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DO 313 JL = 1, KDLON |
317 |
|
|
ZFD(JL) = ZFD(JL) + ZCLM(JL,JK1,JK1) * ZDNF(JL,JK1+1,JK1) |
318 |
|
|
313 CONTINUE |
319 |
|
|
C |
320 |
|
|
C* CONTRIBUTION FROM OTHER CLOUDY FRACTIONS |
321 |
|
|
C |
322 |
|
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DO 315 JK = KFLEV-1 , JK1 , -1 |
323 |
|
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DO 314 JL = 1, KDLON |
324 |
|
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ZCFRAC = ZCLM(JL,JK1,JK+1) - ZCLM(JL,JK1,JK) |
325 |
|
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ZFD(JL) = ZFD(JL) + ZCFRAC * ZDNF(JL,JK+2,JK1) |
326 |
|
|
314 CONTINUE |
327 |
|
|
315 CONTINUE |
328 |
|
|
C |
329 |
|
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DO 316 JL = 1, KDLON |
330 |
|
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PFLUX(JL,2,JK1) = ZFD (JL) |
331 |
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316 CONTINUE |
332 |
|
|
C |
333 |
|
|
317 CONTINUE |
334 |
|
|
C |
335 |
|
|
C |
336 |
|
|
C |
337 |
|
|
C |
338 |
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C* 3.2 UPWARD FLUX AT THE SURFACE |
339 |
|
|
C -------------------------- |
340 |
|
|
C |
341 |
|
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320 CONTINUE |
342 |
|
|
C |
343 |
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DO 321 JL = 1, KDLON |
344 |
|
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PFLUX(JL,1,1) = PEMIS(JL)*PBSUIN(JL)-(1.-PEMIS(JL))*PFLUX(JL,2,1) |
345 |
|
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321 CONTINUE |
346 |
|
|
C |
347 |
|
|
C |
348 |
|
|
C |
349 |
|
|
C* 3.3 UPWARD FLUXES |
350 |
|
|
C ------------- |
351 |
|
|
C |
352 |
|
|
330 CONTINUE |
353 |
|
|
C |
354 |
|
|
DO 337 JK1 = 2 , KFLEV+1 |
355 |
|
|
C |
356 |
|
|
C* CONTRIBUTION FROM CLEAR-SKY FRACTION |
357 |
|
|
C |
358 |
|
|
DO 332 JL = 1, KDLON |
359 |
|
|
ZFU (JL) = (1. - ZCLM(JL,JK1,1)) * ZUPF(JL,1,JK1) |
360 |
|
|
332 CONTINUE |
361 |
|
|
C |
362 |
|
|
C* CONTRIBUTION FROM ADJACENT CLOUD |
363 |
|
|
C |
364 |
|
|
DO 333 JL = 1, KDLON |
365 |
|
|
ZFU(JL) = ZFU(JL) + ZCLM(JL,JK1,JK1-1) * ZUPF(JL,JK1,JK1) |
366 |
|
|
333 CONTINUE |
367 |
|
|
C |
368 |
|
|
C* CONTRIBUTION FROM OTHER CLOUDY FRACTIONS |
369 |
|
|
C |
370 |
|
|
DO 335 JK = 2 , JK1-1 |
371 |
|
|
DO 334 JL = 1, KDLON |
372 |
|
|
ZCFRAC = ZCLM(JL,JK1,JK-1) - ZCLM(JL,JK1,JK) |
373 |
|
|
ZFU(JL) = ZFU(JL) + ZCFRAC * ZUPF(JL,JK ,JK1) |
374 |
|
|
334 CONTINUE |
375 |
|
|
335 CONTINUE |
376 |
|
|
C |
377 |
|
|
DO 336 JL = 1, KDLON |
378 |
|
|
PFLUX(JL,1,JK1) = ZFU (JL) |
379 |
|
|
336 CONTINUE |
380 |
|
|
C |
381 |
|
|
337 CONTINUE |
382 |
|
|
C |
383 |
|
|
C |
384 |
|
|
END IF |
385 |
|
|
C |
386 |
|
|
C |
387 |
|
|
C* 2.3 END OF CLOUD EFFECT COMPUTATIONS |
388 |
|
|
C |
389 |
|
|
230 CONTINUE |
390 |
|
|
C |
391 |
|
|
IF (.NOT.LEVOIGT) THEN |
392 |
|
|
DO 231 JL = 1, KDLON |
393 |
|
|
ZFN10(JL) = PFLUX(JL,1,KLIM) + PFLUX(JL,2,KLIM) |
394 |
|
|
231 CONTINUE |
395 |
|
|
DO 233 JK = KLIM+1 , KFLEV+1 |
396 |
|
|
DO 232 JL = 1, KDLON |
397 |
|
|
ZFN10(JL) = ZFN10(JL) + PCTS(JL,JK-1) |
398 |
|
|
PFLUX(JL,1,JK) = ZFN10(JL) |
399 |
|
|
PFLUX(JL,2,JK) = 0.0 |
400 |
|
|
232 CONTINUE |
401 |
|
|
233 CONTINUE |
402 |
|
|
ENDIF |
403 |
|
|
C |
404 |
|
|
RETURN |
405 |
|
|
END |