source: LMDZ6/trunk/libf/phylmd/ecrad/ifsrrtm/rrtm_prepare_gases.F90 @ 5437

Last change on this file since 5437 was 4773, checked in by idelkadi, 13 months ago
  • Update of Ecrad in LMDZ The same organization of the Ecrad offline version is retained in order to facilitate the updating of Ecrad in LMDZ and the comparison between online and offline results. version 1.6.1 of Ecrad (​https://github.com/lguez/ecrad.git)
  • Implementation of the double call of Ecrad in LMDZ


File size: 8.7 KB
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1SUBROUTINE RRTM_PREPARE_GASES &
2 &( KIDIA, KFDIA, KLON, KLEV, &
3 &  PAPH , PAP , &
4 &  PTH  , PT  , &
5 &  PQ   , PCO2 , PCH4, PN2O  , PNO2, PC11, PC12, PC22, PCL4, POZN, &
6 &  PCOLDRY, PWBRODL, PWKL, PWX , &
7 &  PAVEL  , PTAVEL , PZ  , PTZ , KREFLECT) 
8
9!----compiled for Cray with -h nopattern----
10
11!     Prepare the units of the gas concentrations for the longwave
12!     RRTM gas absorption model.  This file is adapted from
13!     rrtm_ecrt_140gp_mcica.F90, written mainly by Jean-Jacques
14!     Morcrette.
15
16!- Original
17!     2015-07-15  Robin Hogan
18
19!- Modifications
20
21USE PARKIND1 , ONLY : JPIM, JPRB
22USE YOMHOOK  , ONLY : LHOOK, DR_HOOK, JPHOOK
23USE YOMCST   , ONLY : RG
24USE PARRRTM  , ONLY : JPXSEC, JPINPX 
25USE YOMDYNCORE,ONLY : RPLRG
26
27!------------------------------Arguments--------------------------------
28
29IMPLICIT NONE
30
31INTEGER(KIND=JPIM),INTENT(IN)    :: KLON! Number of atmospheres (longitudes)
32INTEGER(KIND=JPIM),INTENT(IN)    :: KLEV! Number of atmospheric layers
33INTEGER(KIND=JPIM),INTENT(IN)    :: KIDIA, KFDIA
34
35REAL(KIND=JPRB)   ,INTENT(IN)    :: PAPH(KLON,KLEV+1) ! Interface pressures (Pa)
36REAL(KIND=JPRB)   ,INTENT(IN)    :: PAP(KLON,KLEV) ! Layer pressures (Pa)
37REAL(KIND=JPRB)   ,INTENT(IN)    :: PTH(KLON,KLEV+1) ! Interface temperatures (K)
38REAL(KIND=JPRB)   ,INTENT(IN)    :: PT(KLON,KLEV) ! Layer temperature (K)
39REAL(KIND=JPRB)   ,INTENT(IN)    :: PQ(KLON,KLEV) ! H2O specific humidity (mmr)
40REAL(KIND=JPRB)   ,INTENT(IN)    :: PCO2(KLON,KLEV) ! CO2 mass mixing ratio
41REAL(KIND=JPRB)   ,INTENT(IN)    :: PCH4(KLON,KLEV) ! CH4 mass mixing ratio
42REAL(KIND=JPRB)   ,INTENT(IN)    :: PN2O(KLON,KLEV) ! N2O mass mixing ratio
43REAL(KIND=JPRB)   ,INTENT(IN)    :: PNO2(KLON,KLEV) ! NO2 mass mixing ratio
44REAL(KIND=JPRB)   ,INTENT(IN)    :: PC11(KLON,KLEV) ! CFC11 mass mixing ratio
45REAL(KIND=JPRB)   ,INTENT(IN)    :: PC12(KLON,KLEV) ! CFC12 mass mixing ratio
46REAL(KIND=JPRB)   ,INTENT(IN)    :: PC22(KLON,KLEV) ! CFC22 mass mixing ratio
47REAL(KIND=JPRB)   ,INTENT(IN)    :: PCL4(KLON,KLEV) ! CCL4  mass mixing ratio
48REAL(KIND=JPRB)   ,INTENT(IN)    :: POZN(KLON,KLEV) ! O3 mass mixing ratio
49
50REAL(KIND=JPRB)   ,INTENT(OUT)   :: PCOLDRY(KIDIA:KFDIA,KLEV)
51REAL(KIND=JPRB)   ,INTENT(OUT)   :: PWBRODL(KIDIA:KFDIA,KLEV) ! broadening gas column density (mol/cm2)
52REAL(KIND=JPRB)   ,INTENT(OUT)   :: PWKL(KIDIA:KFDIA,JPINPX,KLEV)
53REAL(KIND=JPRB)   ,INTENT(OUT)   :: PWX(KIDIA:KFDIA,JPXSEC,KLEV) ! Amount of trace gases
54REAL(KIND=JPRB)   ,INTENT(OUT)   :: PAVEL(KIDIA:KFDIA,KLEV)
55REAL(KIND=JPRB)   ,INTENT(OUT)   :: PTAVEL(KIDIA:KFDIA,KLEV)
56REAL(KIND=JPRB)   ,INTENT(OUT)   :: PZ(KIDIA:KFDIA,0:KLEV)
57REAL(KIND=JPRB)   ,INTENT(OUT)   :: PTZ(KIDIA:KFDIA,0:KLEV)
58INTEGER(KIND=JPIM),INTENT(OUT)   :: KREFLECT(KIDIA:KFDIA)
59
60!      real rch4                       ! CH4 mass mixing ratio
61!      real rn2o                       ! N2O mass mixing ratio
62!      real rcfc11                     ! CFC11 mass mixing ratio
63!      real rcfc12                     ! CFC12 mass mixing ratio
64!      real rcfc22                     ! CFC22 mass mixing ratio
65!      real rccl4                      ! CCl4  mass mixing ratio
66!- from PROFILE             
67!- from SURFACE             
68REAL(KIND=JPRB) :: ZAMD                  ! Effective molecular weight of dry air (g/mol)
69REAL(KIND=JPRB) :: ZAMW                  ! Molecular weight of water vapor (g/mol)
70REAL(KIND=JPRB) :: ZAMCO2                ! Molecular weight of carbon dioxide (g/mol)
71REAL(KIND=JPRB) :: ZAMO                  ! Molecular weight of ozone (g/mol)
72REAL(KIND=JPRB) :: ZAMCH4                ! Molecular weight of methane (g/mol)
73REAL(KIND=JPRB) :: ZAMN2O                ! Molecular weight of nitrous oxide (g/mol)
74REAL(KIND=JPRB) :: ZAMC11                ! Molecular weight of CFC11 (g/mol) - CFCL3
75REAL(KIND=JPRB) :: ZAMC12                ! Molecular weight of CFC12 (g/mol) - CF2CL2
76REAL(KIND=JPRB) :: ZAMC22                ! Molecular weight of CFC22 (g/mol) - CHF2CL
77REAL(KIND=JPRB) :: ZAMCL4                ! Molecular weight of CCl4  (g/mol) - CCL4
78REAL(KIND=JPRB) :: ZAVGDRO               ! Avogadro's number (molecules/mole)
79REAL(KIND=JPRB) :: ZGRAVIT               ! Gravitational acceleration (cm/s**2)
80
81REAL(KIND=JPRB) :: ZSUMMOL
82
83! Atomic weights for conversion from mass to volume mixing ratios; these
84!  are the same values used in ECRT to assure accurate conversion to vmr
85data ZAMD   /  28.970_JPRB    /
86data ZAMW   /  18.0154_JPRB   /
87data ZAMCO2 /  44.011_JPRB    /
88data ZAMO   /  47.9982_JPRB   /
89data ZAMCH4 /  16.043_JPRB    /
90data ZAMN2O /  44.013_JPRB    /
91data ZAMC11 / 137.3686_JPRB   /
92data ZAMC12 / 120.9140_JPRB   /
93data ZAMC22 /  86.4690_JPRB   /
94data ZAMCL4 / 153.8230_JPRB   /
95data ZAVGDRO/ 6.02214E23_JPRB /
96
97INTEGER(KIND=JPIM) :: IATM, JMOL, IXMAX, J1, J2, JK, JL
98INTEGER(KIND=JPIM) :: ITMOL, INXMOL
99
100REAL(KIND=JPRB) :: ZAMM
101
102REAL(KIND=JPHOOK) :: ZHOOK_HANDLE
103
104! ***
105
106! *** mji
107! Initialize all molecular amounts to zero here,
108! then pass ECRT amounts into RRTM arrays below.
109
110!      DATA ZWKL /MAXPRDW*0.0/
111!      DATA ZWX  /MAXPROD*0.0/
112!      DATA KREFLECT /0/
113
114! Activate cross section molecules:
115!     NXMOL     - number of cross-sections input by user
116!     IXINDX(I) - index of cross-section molecule corresponding to Ith
117!                 cross-section specified by user
118!                 = 0 -- not allowed in RRTM
119!                 = 1 -- CCL4
120!                 = 2 -- CFC11
121!                 = 3 -- CFC12
122!                 = 4 -- CFC22
123!      DATA KXMOL  /2/
124!      DATA KXINDX /0,2,3,0,31*0/
125
126!      IREFLECT=KREFLECT
127!      NXMOL=KXMOL
128
129IF (LHOOK) CALL DR_HOOK('RRTM_PREPARE_GASES',0,ZHOOK_HANDLE)
130
131ZGRAVIT=(RG/RPLRG)*1.E2_JPRB
132
133DO JL = KIDIA, KFDIA
134  KREFLECT(JL)=0
135  INXMOL=2
136ENDDO
137
138!DO J1=1,35
139! IXINDX(J1)=0
140DO J2=1,KLEV
141  DO J1=1,35
142    DO JL = KIDIA, KFDIA
143      PWKL(JL,J1,J2)=0.0_JPRB
144    ENDDO
145  ENDDO
146ENDDO
147!IXINDX(2)=2
148!IXINDX(3)=3
149
150!     Set parameters needed for RRTM execution:
151IATM    = 0
152!      IXSECT  = 1
153!      NUMANGS = 0
154!      IOUT    = -1
155IXMAX   = 4
156
157DO JL = KIDIA, KFDIA
158!     Install ECRT arrays into RRTM arrays for pressure, temperature,
159!     and molecular amounts.  Pressures are converted from Pascals
160!     (ECRT) to mb (RRTM).  H2O, CO2, O3 and trace gas amounts are
161!     converted from mass mixing ratio to volume mixing ratio.  CO2
162!     converted with same dry air and CO2 molecular weights used in
163!     ECRT to assure correct conversion back to the proper CO2 vmr.
164!     The dry air column COLDRY (in molec/cm2) is calculated from
165!     the level pressures PZ (in mb) based on the hydrostatic equation
166!     and includes a correction to account for H2O in the layer.  The
167!     molecular weight of moist air (amm) is calculated for each layer.
168!     Note: RRTM levels count from bottom to top, while the ECRT input
169!     variables count from the top down and must be reversed
170  ITMOL = 7
171  PZ(JL,0) = PAPH(JL,KLEV+1)/100._JPRB
172  PTZ(JL,0) = PTH(JL,KLEV+1)
173ENDDO
174
175  DO JK = 1, KLEV
176    DO JL = KIDIA, KFDIA
177    PAVEL(JL,JK) = PAP(JL,KLEV-JK+1)/100._JPRB
178    PTAVEL(JL,JK) = PT(JL,KLEV-JK+1)
179    PZ(JL,JK) = PAPH(JL,KLEV-JK+1)/100._JPRB
180    PTZ(JL,JK) = PTH(JL,KLEV-JK+1)
181    ! RRTMG cannot cope with zero or negative water vapour
182    PWKL(JL,1,JK) = MAX(PQ(JL,KLEV-JK+1),1.0E-15)*ZAMD/ZAMW
183    PWKL(JL,2,JK) = PCO2(JL,KLEV-JK+1)*ZAMD/ZAMCO2
184    PWKL(JL,3,JK) = POZN(JL,KLEV-JK+1)*ZAMD/ZAMO
185    PWKL(JL,4,JK) = PN2O(JL,KLEV-JK+1)*ZAMD/ZAMN2O
186    PWKL(JL,6,JK) = PCH4(JL,KLEV-JK+1)*ZAMD/ZAMCH4
187    PWKL(JL,7,JK) = 0.209488_JPRB
188    ZAMM = (1.0_JPRB-PWKL(JL,1,JK))*ZAMD + PWKL(JL,1,JK)*ZAMW
189    PCOLDRY(JL,JK) = (PZ(JL,JK-1)-PZ(JL,JK))*1.E3_JPRB*ZAVGDRO/(ZGRAVIT*ZAMM*(1.0_JPRB+PWKL(JL,1,JK)))
190  ENDDO
191  ENDDO
192
193  DO J2=1,KLEV
194    DO J1=1,JPXSEC
195      DO JL = KIDIA, KFDIA
196        PWX(JL,J1,J2)=0.0_JPRB
197      ENDDO
198    ENDDO
199  ENDDO
200
201  DO JK = 1, KLEV
202DO JL = KIDIA, KFDIA
203!- Set cross section molecule amounts from ECRT; convert to vmr
204    PWX(JL,1,JK) = PCL4(JL,KLEV-JK+1) * ZAMD/ZAMCL4
205    PWX(JL,2,JK) = PC11(JL,KLEV-JK+1) * ZAMD/ZAMC11
206    PWX(JL,3,JK) = PC12(JL,KLEV-JK+1) * ZAMD/ZAMC12
207    PWX(JL,4,JK) = PC22(JL,KLEV-JK+1) * ZAMD/ZAMC22
208    PWX(JL,1,JK) = PCOLDRY(JL,JK) * PWX(JL,1,JK) * 1.E-20_JPRB
209    PWX(JL,2,JK) = PCOLDRY(JL,JK) * PWX(JL,2,JK) * 1.E-20_JPRB
210    PWX(JL,3,JK) = PCOLDRY(JL,JK) * PWX(JL,3,JK) * 1.E-20_JPRB
211    PWX(JL,4,JK) = PCOLDRY(JL,JK) * PWX(JL,4,JK) * 1.E-20_JPRB
212
213!- Here, all molecules in WKL and WX are in volume mixing ratio; convert to
214!  molec/cm2 based on COLDRY for use in RRTM
215
216!CDIR UNROLL=6
217ZSUMMOL = 0.0_JPRB
218!AB broadening gases
219    DO JMOL = 2, ITMOL
220      ZSUMMOL = ZSUMMOL + PWKL(JL,JMOL,JK)
221    ENDDO
222    PWBRODL(JL,JK) = PCOLDRY(JL,JK) * (1._JPRB - ZSUMMOL)
223    DO JMOL = 1, ITMOL
224      PWKL(JL,JMOL,JK) = PCOLDRY(JL,JK) * PWKL(JL,JMOL,JK)
225    ENDDO   
226  ENDDO
227ENDDO
228
229!     ------------------------------------------------------------------
230IF (LHOOK) CALL DR_HOOK('RRTM_PREPARE_GASES',1,ZHOOK_HANDLE)
231
232END SUBROUTINE RRTM_PREPARE_GASES
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