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module FCTTRE |
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|
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! From phylmd/FCTTRE.inc, version 1.2, 2004/06/22 11:45:32 |
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|
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! This module includes the thermodynamical functions for the cycle |
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! 39 ECMWF physics package. Consistent with "SUPHEC_M" basic |
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! physical constants, assuming the partial pressure of water vapour |
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! is given by a first order Taylor expansion of "Qs(T)" with respect |
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! to temperature, using constants in "yoethf_m". |
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|
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! Probably from Buck, 1981, Journal of Applied Meteorology, volume |
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! 20, number 12, page 1527. |
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|
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implicit none |
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|
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LOGICAL, PARAMETER:: thermcep = .TRUE. |
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|
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contains |
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|
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elemental REAL function FOEEW(T, ICE) |
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|
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use yoethf_m, only: R3LES, R3IES, R4LES, R4IES |
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use SUPHEC_M, only: rtt |
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|
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REAL, intent(in):: T |
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logical, intent(in):: ICE ! else liquid |
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|
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!----------------------- |
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|
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FOEEW = exp(merge(R3IES / (T - R4IES), R3lES / (T - R4lES), ice) & |
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* (T - RTT)) |
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|
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end function FOEEW |
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|
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!****************************************** |
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|
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REAL function FOEDE(T, ICE, P5ARG, QS, PCOARG) |
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|
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use yoethf_m, only: R4LES, R4IES |
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|
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REAL, intent(in):: T |
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logical, intent(in):: ICE ! else liquid |
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real, intent(in):: P5ARG, QS, PCOARG |
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|
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!----------------------- |
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|
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FOEDE = QS * PCOARG * P5ARG / (T - merge(R4IES, R4lES, ice))**2 |
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|
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end function FOEDE |
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|
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!****************************************** |
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|
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elemental REAL function qsats(t) |
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|
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REAL, intent(in):: T |
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|
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!----------------------- |
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|
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qsats = 100. * 0.622 & |
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* 10.**(2.07023 - 0.00320991 * t - 2484.896 / t + 3.56654 * LOG10(t)) |
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|
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end function qsats |
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|
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!****************************************** |
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|
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elemental REAL function qsatl(t) |
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|
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REAL, intent(in):: T |
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|
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!----------------------- |
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|
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qsatl = 100. * 0.622 * 10.**(23.8319 - 2948.964 / t & |
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- 5.028 * LOG10(t) - 29810.16 * EXP(- 0.0699382 * t) & |
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+ 25.21935 * EXP(- 2999.924 / t)) |
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|
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end function qsatl |
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|
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!****************************************** |
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|
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REAL function dqsats(t, qs) |
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|
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use SUPHEC_M, only: RLVTT, rcpd |
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|
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REAL, intent(in):: T, qs |
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|
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!----------------------- |
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|
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dqsats = RLVTT / RCPD * qs * (3.56654/t & |
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+2484.896*LOG(10.)/t**2 - 0.00320991*LOG(10.)) |
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|
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end function dqsats |
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|
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!****************************************** |
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|
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REAL function dqsatl(t, qs) |
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|
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use SUPHEC_M, only: RLVTT, rcpd |
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|
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REAL, intent(in):: T, qs |
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|
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!----------------------- |
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|
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dqsatl = RLVTT / RCPD * qs * LOG(10.) * (2948.964 / t**2 - 5.028 & |
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/ LOG(10.) / t + 25.21935 * 2999.924 / t**2 * EXP(- 2999.924 / t) & |
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+ 29810.16 * 0.0699382 * EXP(- 0.0699382 * t)) |
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|
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end function dqsatl |
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|
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end module FCTTRE |
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