trunk/phylmd/FCTTRE.f

module FCTTRE

  ! From phylmd/FCTTRE.inc, version 1.2, 2004/06/22 11:45:32

  ! This module includes the thermodynamical functions for the cycle
  ! 39 ECMWF physics package. Consistent with "SUPHEC_M" basic
  ! physical constants, assuming the partial pressure of water vapour
  ! is given by a first order Taylor expansion of "Qs(T)" with respect
  ! to temperature, using constants in "yoethf_m".

  ! Probably from Buck, 1981, Journal of Applied Meteorology, volume
  ! 20, number 12, page 1527.

  implicit none

  LOGICAL, PARAMETER:: thermcep = .TRUE.

contains

  elemental REAL function FOEEW(T, DEL)

    use yoethf_m, only: R3LES, R3IES, R4LES, R4IES
    use SUPHEC_M, only: rtt

    REAL, intent(in):: T
    logical, intent(in):: DEL ! ice, else liquid

    !-----------------------

    FOEEW = exp(merge(R3IES / (T - R4IES), R3lES / (T - R4lES), del) &
         * (T - RTT))

  end function FOEEW

  !******************************************

  REAL function FOEDE(T, DEL, P5ARG, QS, PCOARG)

    use yoethf_m, only: R4LES, R4IES

    REAL, intent(in):: T
    logical, intent(in):: DEL ! ice, else liquid
    real, intent(in):: P5ARG, QS, PCOARG

    !-----------------------

    FOEDE = QS * PCOARG * P5ARG / (T - merge(R4IES, R4lES, del))**2

  end function FOEDE

  !******************************************

  elemental REAL function qsats(t)

    REAL, intent(in):: T

    !-----------------------

    qsats = 100. * 0.622 &
         * 10.**(2.07023 - 0.00320991 * t - 2484.896 / t + 3.56654 * LOG10(t))

  end function qsats

  !******************************************

  elemental REAL function qsatl(t)

    REAL, intent(in):: T

    !-----------------------

    qsatl = 100. * 0.622 * 10.**(23.8319 - 2948.964 / t &
         - 5.028 * LOG10(t) - 29810.16 * EXP(- 0.0699382 * t) &
         + 25.21935 * EXP(- 2999.924 / t))

  end function qsatl

  !******************************************

  REAL function dqsats(t, qs)

    use SUPHEC_M, only: RLVTT, rcpd

    REAL, intent(in):: T, qs

    !-----------------------

    dqsats = RLVTT / RCPD * qs * (3.56654/t &
         +2484.896*LOG(10.)/t**2 - 0.00320991*LOG(10.))

  end function dqsats

  !******************************************

  REAL function dqsatl(t, qs)

    use SUPHEC_M, only: RLVTT, rcpd

    REAL, intent(in):: T, qs

    !-----------------------

    dqsatl = RLVTT / RCPD * qs * LOG(10.) * (2948.964 / t**2 - 5.028 &
         / LOG(10.) / t + 25.21935 * 2999.924 / t**2 * EXP(- 2999.924 / t) &
         + 29810.16 * 0.0699382 * EXP(- 0.0699382 * t))

  end function dqsatl

end module FCTTRE
1	module FCTTRE
2
3	! From phylmd/FCTTRE.inc, version 1.2, 2004/06/22 11:45:32
4
5	! This module includes the thermodynamical functions for the cycle
6	! 39 ECMWF physics package. Consistent with "SUPHEC_M" basic
7	! physical constants, assuming the partial pressure of water vapour
8	! is given by a first order Taylor expansion of "Qs(T)" with respect
9	! to temperature, using constants in "yoethf_m".
10
11	! Probably from Buck, 1981, Journal of Applied Meteorology, volume
12	! 20, number 12, page 1527.
13
14	implicit none
15
16	LOGICAL, PARAMETER:: thermcep = .TRUE.
17
18	contains
19
20	elemental REAL function FOEEW(T, DEL)
21
22	use yoethf_m, only: R3LES, R3IES, R4LES, R4IES
23	use SUPHEC_M, only: rtt
24
25	REAL, intent(in):: T
26	logical, intent(in):: DEL ! ice, else liquid
27
28	!-----------------------
29
30	FOEEW = exp(merge(R3IES / (T - R4IES), R3lES / (T - R4lES), del) &
31	* (T - RTT))
32
33	end function FOEEW
34
35	!******************************************
36
37	REAL function FOEDE(T, DEL, P5ARG, QS, PCOARG)
38
39	use yoethf_m, only: R4LES, R4IES
40
41	REAL, intent(in):: T
42	logical, intent(in):: DEL ! ice, else liquid
43	real, intent(in):: P5ARG, QS, PCOARG
44
45	!-----------------------
46
47	FOEDE = QS * PCOARG * P5ARG / (T - merge(R4IES, R4lES, del))**2
48
49	end function FOEDE
50
51	!******************************************
52
53	elemental REAL function qsats(t)
54
55	REAL, intent(in):: T
56
57	!-----------------------
58
59	qsats = 100. * 0.622 &
60	* 10.*(2.07023 - 0.00320991 t - 2484.896 / t + 3.56654 * LOG10(t))
61
62	end function qsats
63
64	!******************************************
65
66	elemental REAL function qsatl(t)
67
68	REAL, intent(in):: T
69
70	!-----------------------
71
72	qsatl = 100. * 0.622 * 10.**(23.8319 - 2948.964 / t &
73	- 5.028 * LOG10(t) - 29810.16 * EXP(- 0.0699382 * t) &
74	+ 25.21935 * EXP(- 2999.924 / t))
75
76	end function qsatl
77
78	!******************************************
79
80	REAL function dqsats(t, qs)
81
82	use SUPHEC_M, only: RLVTT, rcpd
83
84	REAL, intent(in):: T, qs
85
86	!-----------------------
87
88	dqsats = RLVTT / RCPD * qs * (3.56654/t &
89	+2484.896LOG(10.)/t2 - 0.00320991LOG(10.))
90
91	end function dqsats
92
93	!******************************************
94
95	REAL function dqsatl(t, qs)
96
97	use SUPHEC_M, only: RLVTT, rcpd
98
99	REAL, intent(in):: T, qs
100
101	!-----------------------
102
103	dqsatl = RLVTT / RCPD * qs * LOG(10.) * (2948.964 / t**2 - 5.028 &
104	/ LOG(10.) / t + 25.21935 * 2999.924 / t*2 EXP(- 2999.924 / t) &
105	+ 29810.16 * 0.0699382 * EXP(- 0.0699382 * t))
106
107	end function dqsatl
108
109	end module FCTTRE