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module flxbase_m |
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|
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IMPLICIT none |
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|
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contains |
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SUBROUTINE flxbase(ptenh, pqenh, pgeoh, paph, ptu, pqu, plu, ldcum, kcbot, & |
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klab) |
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|
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! This routine calculates cloud base values (T and Q). |
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! Input are environmental values of T, q, p, Phi at half levels. |
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! It returns cloud base values and flags as follows: |
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! klab = 1 for subcloud levels |
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! klab = 2 for condensation level |
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|
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! Lift surface air dry-adiabatically to cloud base |
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! (non entraining plume, i. e. constant massflux) |
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|
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USE dimphy, ONLY: klev, klon |
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USE flxadjtq_m, ONLY: flxadjtq |
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USE suphec_m, ONLY: rcpd, retv |
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|
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REAL ptenh(klon, klev), pqenh(klon, klev) |
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REAL, intent(in):: pgeoh(klon, klev), paph(klon, klev+1) |
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REAL ptu(klon, klev), pqu(klon, klev), plu(klon, klev) |
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LOGICAL ldcum(klon) |
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INTEGER kcbot(klon), klab(klon, klev) |
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|
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! Local: |
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LOGICAL llflag(klon) |
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INTEGER i, k, icall, is |
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REAL zbuo, zqold(klon) |
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|
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!---------------------------------------------------------------------- |
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|
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! INITIALIZE VALUES AT LIFTING LEVEL |
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DO i = 1, klon |
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klab(i, klev) = 1 |
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kcbot(i) = klev-1 |
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ldcum(i) = .FALSE. |
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ENDDO |
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|
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! DO ASCENT IN SUBCLOUD LAYER, |
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! CHECK FOR EXISTENCE OF CONDENSATION LEVEL, |
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! ADJUST T, Q AND L ACCORDINGLY |
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! CHECK FOR BUOYANCY AND SET FLAGS |
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|
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DO k = klev-1, 2, -1 |
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is = 0 |
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DO i = 1, klon |
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IF (klab(i, k+1).EQ.1) is = is + 1 |
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llflag(i) = .FALSE. |
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IF (klab(i, k+1).EQ.1) llflag(i) = .TRUE. |
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ENDDO |
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|
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IF (is.EQ.0) cycle |
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|
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DO i = 1, klon |
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IF(llflag(i)) THEN |
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pqu(i, k) = pqu(i, k+1) |
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ptu(i, k) = ptu(i, k+1)+(pgeoh(i, k+1)-pgeoh(i, k))/RCPD |
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zbuo = ptu(i, k)*(1.+RETV*pqu(i, k))- & |
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ptenh(i, k)*(1.+RETV*pqenh(i, k))+0.5 |
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IF (zbuo.GT.0.) klab(i, k) = 1 |
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zqold(i) = pqu(i, k) |
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ENDIF |
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ENDDO |
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|
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icall = 1 |
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CALL flxadjtq(paph(:, k), ptu(1, k), pqu(1, k), llflag, icall) |
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|
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DO i = 1, klon |
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IF (llflag(i).AND.pqu(i, k).NE.zqold(i)) THEN |
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klab(i, k) = 2 |
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plu(i, k) = plu(i, k) + zqold(i)-pqu(i, k) |
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zbuo = ptu(i, k)*(1.+RETV*pqu(i, k))- & |
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ptenh(i, k)*(1.+RETV*pqenh(i, k))+0.5 |
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IF (zbuo.GT.0.) kcbot(i) = k |
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IF (zbuo.GT.0.) ldcum(i) = .TRUE. |
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ENDIF |
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ENDDO |
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end DO |
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|
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END SUBROUTINE flxbase |
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|
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end module flxbase_m |
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