!OPTIONS XOPT(HSFUN) SUBROUTINE OLWTT (KIDIA,KFDIA,KLON, PGA,PGB,PUU, PTT) ! !**** *LWTT* - LONGWAVE TRANSMISSION FUNCTIONS ! ! PURPOSE. ! -------- ! THIS ROUTINE COMPUTES THE TRANSMISSION FUNCTIONS FOR ALL THE ! ABSORBERS (H2O, UNIFORMLY MIXED GASES, AND O3) IN ALL SIX SPECTRAL ! INTERVALS. ! !** INTERFACE. ! ---------- ! *LWTT* IS CALLED FROM *LWVN*, *LWVD*, *LWVB* ! ! ! EXPLICIT ARGUMENTS : ! -------------------- ! ==== INPUTS === ! KND : ; WEIGHTING INDEX ! PUU : (KLON,NUA) ; ABSORBER AMOUNTS ! ==== OUTPUTS === ! PTT : (KLON,NTRA) ; TRANSMISSION FUNCTIONS ! ! IMPLICIT ARGUMENTS : NONE ! -------------------- ! ! METHOD. ! ------- ! ! 1. TRANSMISSION FUNCTION BY H2O AND UNIFORMLY MIXED GASES ARE ! COMPUTED USING PADE APPROXIMANTS AND HORNER'S ALGORITHM. ! 2. TRANSMISSION BY O3 IS EVALUATED WITH MALKMUS'S BAND MODEL. ! 3. TRANSMISSION BY H2O CONTINUUM AND AEROSOLS FOLLOW AN ! A SIMPLE EXPONENTIAL DECREASE WITH ABSORBER AMOUNT. ! ! EXTERNALS. ! ---------- ! ! NONE ! ! REFERENCE. ! ---------- ! ! SEE RADIATION'S PART OF THE MODEL'S DOCUMENTATION AND ! ECMWF RESEARCH DEPARTMENT DOCUMENTATION OF THE IFS ! ! AUTHOR. ! ------- ! JEAN-JACQUES MORCRETTE *ECMWF* ! ! MODIFICATIONS. ! -------------- ! ORIGINAL : 88-12-15 ! !----------------------------------------------------------------------- ! IMPLICIT LOGICAL (L) ! !#include "yoelw.h" !#include "yoerad.h" !#include "yoerdu.h" #include "tsmbkind.h" USE YOEOLW , ONLY : NTRA ,NUA ,& & O1H , O2H ,RPIALF0 IMPLICIT NONE ! DUMMY INTEGER SCALARS INTEGER_M :: KFDIA INTEGER_M :: KIDIA INTEGER_M :: KLON ! ------------------------------------------------------------------ ! !* 0.1 ARGUMENTS ! --------- ! REAL_B :: PUU(KLON,NUA), PTT(KLON,NTRA) & & , PGA(KLON,8,2), PGB(KLON,8,2) ! ! ------------------------------------------------------------------ ! !* 0.2 LOCAL ARRAYS ! ------------ ! ! REAL ZXN(KLON,8),ZXD(KLON,8),ZZ(KLON,8) ! LOCAL INTEGER SCALARS INTEGER_M :: JA, JL ! LOCAL REAL SCALARS REAL_B :: ZA11, ZA12, ZAERCN, ZEU, ZEU10, ZEU11, ZEU12,& &ZEU13, ZODH41, ZODH42, ZODN21, ZODN22, ZPU, ZPU10, & &ZPU11, ZPU12, ZPU13, ZSQ1, ZSQ2, ZSQH41, & &ZSQH42, ZSQN21, ZSQN22, ZTO1, ZTO2, ZTTF11, & &ZTTF12, ZUU11, ZUU12, ZUXY, ZVXY, ZX, ZXCH4, & &ZXD, ZXN, ZXN2O, ZY, ZYCH4, ZYN2O, ZZ ! ------------------------------------------------------------------ !#!DIR$ VFUNCTION SQRTHF ! !* 1. HORNER'S ALGORITHM FOR H2O AND CO2 TRANSMISSION ! ----------------------------------------------- ! DO JA = 1 , 8 DO JL = KIDIA,KFDIA ZZ =SQRT(PUU(JL,JA)) ! ZXD(JL,1)=PGB( JL, 1,1) + ZZ(JL, 1)*(PGB( JL, 1,2) + ZZ(JL, 1)) ! ZXN(JL,1)=PGA( JL, 1,1) + ZZ(JL, 1)*(PGA( JL, 1,2) ) ! PTT(JL,1)=ZXN(JL,1)/ZXD(JL,1) ZXD =PGB( JL,JA,1) + ZZ *(PGB( JL,JA,2) + ZZ ) ZXN =PGA( JL,JA,1) + ZZ *(PGA( JL,JA,2) ) PTT(JL,JA)=ZXN /ZXD END DO END DO ! ! ------------------------------------------------------------------ ! !* 2. CONTINUUM, OZONE AND AEROSOL TRANSMISSION FUNCTIONS ! --------------------------------------------------- ! DO JL = KIDIA,KFDIA PTT(JL, 9) = PTT(JL, 8) ! !- CONTINUUM ABSORPTION: E- AND P-TYPE ! !- 13 350-500 cm-1 !- 10 500-800 cm-1 !- 11 800-970 + 1110-1250 cm-1 !- 12 970-1110 cm-1 ! ! IF (INWCONT.EQ.0) THEN !- original ECMWF 16r1 coefficients ZPU = 0.002 * PUU(JL,10) ZPU10 = 112. * ZPU ZPU11 = 6.25 * ZPU ZPU12 = 5.00 * ZPU ZPU13 = 80.0 * ZPU ZEU = PUU(JL,11) ZEU10 = 12. * ZEU ZEU11 = 6.25 * ZEU ZEU12 = 5.00 * ZEU ZEU13 = 80.0 * ZEU ! ELSE IF (INWCONT.EQ.1) THEN !- coefficients proposed by Giorgetta and Wild ! ZPU10 = 0.8109 * PUU(JL,10) ! ZPU11 = 0.0208 * PUU(JL,10) ! ZPU12 = 0.0106 * PUU(JL,10) ! ZPU13 = 12.331 * PUU(JL,10) ! ZEU10 = 47.7 * PUU(JL,11) ! ZEU11 = 8.31 * PUU(JL,11) ! ZEU12 = 5.87 * PUU(JL,11) ! ZEU13 = 209. * PUU(JL,11) ! ELSE IF (INWCONT.EQ.2) THEN !- coefficients adjusted from Clough CKD22 !c ZPU10 = 0.00488 * 81.63 * PUU(JL,10) !c ZPU11 = 0.00022 * 8.43 * PUU(JL,10) !c ZPU12 = 0.00001 * 5.08 * PUU(JL,10) !c ZPU13 = 0.03638 * 721.8 * PUU(JL,10) ! ZPU10 = 0.3981 * PUU(JL,10) ! ZPU10 = 0.18 * PUU(JL,10) ! ZPU11 = 0.00127 * PUU(JL,10) ! ZPU12 = 0.00071 * PUU(JL,10) ! ZPU13 = 26.26 * PUU(JL,10) ! !! ZEU10 = 81.63 * PUU(JL,11) ! ZEU10 = 18. * PUU(JL,11) ! ZEU11 = 8.43 * PUU(JL,11) ! ZEU12 = 5.08 * PUU(JL,11) ! ZEU13 = 721.8 * PUU(JL,11) ! END IF ! ! IF (LNOCONT) THEN ! ZPU10 = 0. ! ZPU11 = 0. ! ZPU12 = 0. ! ZPU13 = 0. ! ! ZEU10 = 0. ! ZEU11 = 0. ! ZEU12 = 0. ! ZEU13 = 0. ! END IF ! !- OZONE ABSORPTION ! ZX = PUU(JL,12) ZY = PUU(JL,13) ZUXY = 4. * ZX * ZX / (RPIALF0 * ZY) ZSQ1 = SQRT(1. + O1H * ZUXY ) - 1. ZSQ2 = SQRT(1. + O2H * ZUXY ) - 1. ZVXY = RPIALF0 * ZY / (2. * ZX) ZAERCN = PUU(JL,17) + ZEU12 + ZPU12 ZTO1 = EXP( - ZVXY * ZSQ1 - ZAERCN ) ZTO2 = EXP( - ZVXY * ZSQ2 - ZAERCN ) ! IF (LNOOZON) THEN ! ZTO1 = EXP( - ZAERCN ) ! ZTO2 = EXP( - ZAERCN ) ! END IF ! !-- TRACE GASES (CH4, N2O, CFC-11, CFC-12) ! !* CH4 IN INTERVAL 800-970 + 1110-1250 CM-1 ! ZXCH4 = PUU(JL,19) ZYCH4 = PUU(JL,20) ZUXY = 4. * ZXCH4*ZXCH4/(0.103*ZYCH4) ZSQH41 = SQRT(1. + 33.7 * ZUXY) - 1. ZVXY = 0.103 * ZYCH4 / (2. * ZXCH4) ZODH41 = ZVXY * ZSQH41 ! !* N2O IN INTERVAL 800-970 + 1110-1250 CM-1 ! ZXN2O = PUU(JL,21) ZYN2O = PUU(JL,22) ZUXY = 4. * ZXN2O*ZXN2O/(0.416*ZYN2O) ZSQN21 = SQRT(1. + 21.3 * ZUXY) - 1. ZVXY = 0.416 * ZYN2O / (2. * ZXN2O) ZODN21 = ZVXY * ZSQN21 ! !* CH4 IN INTERVAL 1250-1450 + 1880-2820 CM-1 ! ZUXY = 4. * ZXCH4*ZXCH4/(0.113*ZYCH4) ZSQH42 = SQRT(1. + 400. * ZUXY) - 1. ZVXY = 0.113 * ZYCH4 / (2. * ZXCH4) ZODH42 = ZVXY * ZSQH42 ! !* N2O IN INTERVAL 1250-1450 + 1880-2820 CM-1 ! ZUXY = 4. * ZXN2O*ZXN2O/(0.197*ZYN2O) ZSQN22 = SQRT(1. + 2000. * ZUXY) - 1. ZVXY = 0.197 * ZYN2O / (2. * ZXN2O) ZODN22 = ZVXY * ZSQN22 ! !* CFC-11 IN INTERVAL 800-970 + 1110-1250 CM-1 ! ZA11 = 2. * PUU(JL,23) * 4.404E+05 ZTTF11 = 1. - ZA11 * 0.003225 ! !* CFC-12 IN INTERVAL 800-970 + 1110-1250 CM-1 ! ZA12 = 2. * PUU(JL,24) * 6.7435E+05 ZTTF12 = 1. - ZA12 * 0.003225 ! ! IF (LNOUMG) THEN ! PTT(JL,7) = 1. ! PTT(JL,8) = 1. ! PTT(JL,9) = 1. ! ZODH41 = 0. ! ZODH42 = 0. ! ZODN21 = 0. ! ZODN22 = 0. ! ZTTF11 = 1. ! ZTTF12 = 1. ! END IF ZUU11 = - PUU(JL,15) - ZEU10 - ZPU10 ZUU12 = - PUU(JL,16) - ZEU11 - ZPU11 - ZODH41 - ZODN21 PTT(JL,10) = EXP( - PUU(JL,14) ) PTT(JL,11) = EXP( ZUU11 ) PTT(JL,12) = EXP( ZUU12 ) * ZTTF11 * ZTTF12 PTT(JL,13) = 0.7554 * ZTO1 + 0.2446 * ZTO2 PTT(JL,14) = PTT(JL,10) * EXP( - ZEU13 - ZPU13 ) PTT(JL,15) = EXP ( - PUU(JL,14) - ZODH42 - ZODN22 ) END DO ! RETURN END SUBROUTINE OLWTT