Sources/phylmd/FCTTRE.f

module FCTTRE

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

  ! This COMDECK includes the thermodynamical functions for the cycle
  ! 39 ECMWF Physics package. Consistent with SUPHEC_M basic physics
  ! 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, 20, 1527.

  implicit none

  LOGICAL, PARAMETER:: thermcep= .TRUE.

contains

  REAL function FOEEW(T, DEL)

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

    REAL, intent(in):: T, DEL

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

    FOEEW = EXP((R3LES * (1. - DEL) + R3IES * DEL) * (T - RTT) &
         / (T - (R4LES * (1. - DEL) + R4IES * DEL)))

  end function FOEEW

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

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

    use yoethf_m, only: R4LES, R4IES

    REAL, intent(in):: T, DEL
    real, intent(in):: P5ARG, QS, PCOARG

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

    FOEDE = QS*PCOARG*P5ARG / (T-(R4LES*(1.-DEL)+R4IES*DEL))**2

  end function FOEDE

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

  REAL function qsats(t)

    REAL, intent(in):: T

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

    qsats = 100.0 * 0.622 &
         * 10.**(2.07023 - 0.00320991 * t - 2484.896 / t + 3.56654 * LOG10(t))

  end function qsats

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

  REAL function qsatl(t)

    REAL, intent(in):: T

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

    qsatl = 100.0 * 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 COMDECK includes the thermodynamical functions for the cycle
6	! 39 ECMWF Physics package. Consistent with SUPHEC_M basic physics
7	! constants, assuming the partial pressure of water vapour is given
8	! by a first order Taylor expansion of Qs(T) with respect to
9	! temperature, using constants in yoethf_m.
10	! Probably from Buck, 1981, Journal of Applied Meteorology, 20, 1527.
11
12	implicit none
13
14	LOGICAL, PARAMETER:: thermcep= .TRUE.
15
16	contains
17
18	REAL function FOEEW(T, DEL)
19
20	use yoethf_m, only: R3LES, R3IES, R4LES, R4IES
21	use SUPHEC_M, only: rtt
22
23	REAL, intent(in):: T, DEL
24
25	!-----------------------
26
27	FOEEW = EXP((R3LES * (1. - DEL) + R3IES * DEL) * (T - RTT) &
28	/ (T - (R4LES * (1. - DEL) + R4IES * DEL)))
29
30	end function FOEEW
31
32	!******************************************
33
34	REAL function FOEDE(T, DEL, P5ARG, QS, PCOARG)
35
36	use yoethf_m, only: R4LES, R4IES
37
38	REAL, intent(in):: T, DEL
39	real, intent(in):: P5ARG, QS, PCOARG
40
41	!-----------------------
42
43	FOEDE = QSPCOARGP5ARG / (T-(R4LES(1.-DEL)+R4IESDEL))**2
44
45	end function FOEDE
46
47	!******************************************
48
49	REAL function qsats(t)
50
51	REAL, intent(in):: T
52
53	!-----------------------
54
55	qsats = 100.0 * 0.622 &
56	* 10.*(2.07023 - 0.00320991 t - 2484.896 / t + 3.56654 * LOG10(t))
57
58	end function qsats
59
60	!******************************************
61
62	REAL function qsatl(t)
63
64	REAL, intent(in):: T
65
66	!-----------------------
67
68	qsatl = 100.0 * 0.622 * 10.**(23.8319 - 2948.964 / t &
69	- 5.028 * LOG10(t) - 29810.16 * EXP(- 0.0699382 * t) &
70	+ 25.21935 * EXP(- 2999.924 / t))
71
72	end function qsatl
73
74	!******************************************
75
76	REAL function dqsats(t, qs)
77
78	use SUPHEC_M, only: RLVTT, rcpd
79
80	REAL, intent(in):: T, qs
81
82	!-----------------------
83
84	dqsats = RLVTT / RCPD * qs * (3.56654/t &
85	+2484.896LOG(10.)/t2 - 0.00320991LOG(10.))
86
87	end function dqsats
88
89	!******************************************
90
91	REAL function dqsatl(t, qs)
92
93	use SUPHEC_M, only: RLVTT, rcpd
94
95	REAL, intent(in):: T, qs
96
97	!-----------------------
98
99	dqsatl = RLVTT / RCPD * qs * LOG(10.) &
100	* (2948.964/t**2-5.028/LOG(10.)/t &
101	+25.219352999.924/t2EXP(-2999.924/t) &
102	+29810.160.0699382EXP(-0.0699382*t))
103
104	end function dqsatl
105
106	end module FCTTRE