| 1 | MODULE mocsy_wrapper |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE mocsy_wrapper *** |
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| 4 | !! TOP : MEDUSA |
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| 5 | !!====================================================================== |
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| 6 | !! History : |
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| 7 | !! - ! 2015-06 (A. Yool) added for UKESM project |
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| 8 | !! - ! 2017-04 (A. Yool) alter optK1K2 to 'w14' option |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_medusa && defined key_roam |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! MEDUSA carbonate chemistry |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! mocsy_wrapper |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | |
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| 17 | USE mocsy_mainmod |
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| 18 | USE mocsy_gasflux |
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| 19 | USE in_out_manager ! I/O manager |
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| 20 | |
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| 21 | USE yomhook, ONLY: lhook, dr_hook |
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| 22 | USE parkind1, ONLY: jprb, jpim |
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| 23 | |
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| 24 | IMPLICIT NONE |
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| 25 | PRIVATE |
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| 26 | |
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| 27 | PUBLIC mocsy_interface ! called in trc_bio_medusa |
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| 28 | PUBLIC mocsy_carbchem ! called in trc_bio_medusa |
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| 29 | |
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| 30 | !!* Substitution |
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| 31 | # include "domzgr_substitute.h90" |
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| 32 | !!---------------------------------------------------------------------- |
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| 33 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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| 34 | !! $Id$ |
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| 35 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 36 | !!---------------------------------------------------------------------- |
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| 37 | |
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| 38 | ! The following is a map of the subroutines contained within this module |
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| 39 | ! - mocsy_interface |
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| 40 | ! - CALLS mocsy_carbchem |
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| 41 | ! |
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| 42 | ! - mocsy_carbchem |
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| 43 | ! - CALLS vars |
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| 44 | ! - CALLS p80 |
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| 45 | ! - CALLS constants |
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| 46 | ! - CALLS rho |
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| 47 | ! - CALLS varsolver |
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| 48 | ! - CALLS [phsolvers routines] |
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| 49 | ! - CALLS varsolver (again) |
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| 50 | ! - CALLS x2pCO2atm |
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| 51 | ! - CALLS p2fCO2 |
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| 52 | ! - CALLS schmidt_co2 |
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| 53 | ! - CALLS surface_K0 |
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| 54 | |
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| 55 | CONTAINS |
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| 56 | |
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| 57 | !======================================================================= |
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| 58 | ! |
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| 59 | SUBROUTINE mocsy_interface( temp, sal, alk, dic, sil, phos, & |
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| 60 | Patm, depth, lat, kw660, xco2, N, & |
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| 61 | ph, pco2, fco2, co2, hco3, co3, OmegaA, & |
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| 62 | OmegaC, BetaD, rhoSW, p, tempis, & |
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| 63 | pco2atm, fco2atm, schmidtco2, kwco2, K0, & |
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| 64 | co2starair, co2flux, dpco2 ) |
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| 65 | ! |
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| 66 | !======================================================================= |
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| 67 | ! |
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| 68 | ! AXY (26/06/15): to preserve both MEDUSA's scalar variables and |
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| 69 | ! MOCSY's vector variables on code traceability |
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| 70 | ! grounds, this additional wrapper does a rather |
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| 71 | ! superfluous conversion between the two; in the |
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| 72 | ! fullness of time, this should be dispensed with |
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| 73 | ! and MOCSY used in its full vector form |
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| 74 | ! |
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| 75 | USE mocsy_singledouble |
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| 76 | USE yomhook, ONLY: lhook, dr_hook |
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| 77 | USE parkind1, ONLY: jprb, jpim |
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| 78 | |
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| 79 | IMPLICIT NONE |
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| 80 | |
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| 81 | !> ====================================================================== |
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| 82 | ! VARIABLES |
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| 83 | !> ====================================================================== |
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| 84 | ! |
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| 85 | INTEGER, INTENT(in) :: N |
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| 86 | ! |
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| 87 | ! MEDUSA-side |
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| 88 | ! Input variables |
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| 89 | REAL(kind=wp), INTENT(in) :: temp, sal, alk, dic, sil, phos |
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| 90 | REAL(kind=wp), INTENT(in) :: Patm, depth, lat, kw660, xco2 |
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| 91 | ! |
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| 92 | ! Output variables |
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| 93 | REAL(kind=wp), INTENT(out) :: ph, pco2, fco2, co2, hco3, co3, OmegaA |
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| 94 | REAL(kind=wp), INTENT(out) :: OmegaC, BetaD, rhoSW, p, tempis |
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| 95 | REAL(kind=wp), INTENT(out) :: pco2atm, fco2atm, schmidtco2, kwco2, K0 |
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| 96 | REAL(kind=wp), INTENT(out) :: co2starair, co2flux, dpco2 |
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| 97 | ! |
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| 98 | ! MOCSY-side |
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| 99 | ! Input variables |
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| 100 | REAL(kind=wp), DIMENSION(N) :: mtemp, msal, malk, mdic, msil, mphos |
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| 101 | REAL(kind=wp), DIMENSION(N) :: mPatm, mdepth, mlat, mkw660, mxco2 |
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| 102 | ! |
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| 103 | ! Output variables |
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| 104 | REAL(kind=wp), DIMENSION(N) :: mph, mpco2, mfco2, mco2, mhco3, mco3, mOmegaA |
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| 105 | REAL(kind=wp), DIMENSION(N) :: mOmegaC, mBetaD, mrhoSW, mp, mtempis |
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| 106 | REAL(kind=wp), DIMENSION(N) :: mpco2atm, mfco2atm, mschmidtco2, mkwco2, mK0 |
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| 107 | REAL(kind=wp), DIMENSION(N) :: mco2starair, mco2flux, mdpco2 |
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| 108 | INTEGER(KIND=jpim), PARAMETER :: zhook_in = 0 |
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| 109 | INTEGER(KIND=jpim), PARAMETER :: zhook_out = 1 |
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| 110 | REAL(KIND=jprb) :: zhook_handle |
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| 111 | |
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| 112 | CHARACTER(LEN=*), PARAMETER :: RoutineName='MOCSY_INTERFACE' |
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| 113 | |
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| 114 | IF (lhook) CALL dr_hook(RoutineName,zhook_in,zhook_handle) |
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| 115 | |
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| 116 | ! |
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| 117 | !> ---------------------------------------------------------------------- |
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| 118 | ! Set MOCSY inputs to equal MEDUSA inputs (amend units here) |
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| 119 | !> ---------------------------------------------------------------------- |
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| 120 | ! |
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| 121 | mtemp(1) = temp ! degrees C |
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| 122 | msal(1) = sal ! PSU |
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| 123 | malk(1) = alk / 1000. ! meq / m3 -> eq / m3 |
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| 124 | mdic(1) = dic / 1000. ! mmol / m3 -> mol / m3 |
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| 125 | msil(1) = sil / 1000. ! mmol / m3 -> mol / m3 |
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| 126 | mphos(1) = phos / 1000. ! mmol / m3 -> mol / m3 |
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| 127 | mPatm(1) = Patm ! atm |
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| 128 | mdepth(1) = depth ! m |
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| 129 | mlat(1) = lat ! degrees N |
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| 130 | mkw660(1) = kw660 ! m / s |
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| 131 | mxco2(1) = xco2 ! ppm |
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| 132 | ! |
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| 133 | !> ---------------------------------------------------------------------- |
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| 134 | ! Call MOCSY |
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| 135 | !> ---------------------------------------------------------------------- |
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| 136 | ! |
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| 137 | CALL mocsy_carbchem( mtemp, msal, malk, mdic, msil, mphos, & ! inputs |
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| 138 | mPatm, mdepth, mlat, mkw660, mxco2, 1, & ! inputs |
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| 139 | mph, mpco2, mfco2, mco2, mhco3, mco3, mOmegaA, & ! outputs |
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| 140 | mOmegaC, mBetaD, mrhoSW, mp, mtempis, & ! outputs |
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| 141 | mpco2atm, mfco2atm, mschmidtco2, mkwco2, mK0, & ! outputs |
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| 142 | mco2starair, mco2flux, mdpco2 ) ! outputs |
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| 143 | ! |
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| 144 | !> ---------------------------------------------------------------------- |
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| 145 | ! Set MOCSY outputs to equal MEDUSA outputs (amend units here) |
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| 146 | !> ---------------------------------------------------------------------- |
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| 147 | ! |
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| 148 | ph = mph(1) ! standard units |
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| 149 | pco2 = mpco2(1) ! uatm |
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| 150 | fco2 = mfco2(1) ! uatm |
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| 151 | co2 = mco2(1) * 1000. ! mol / m3 -> mmol / m3 |
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| 152 | hco3 = mhco3(1) * 1000. ! mol / m3 -> mmol / m3 |
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| 153 | co3 = mco3(1) * 1000. ! mol / m3 -> mmol / m3 |
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| 154 | OmegaA = mOmegaA(1) ! dimensionless |
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| 155 | OmegaC = mOmegaC(1) ! dimensionless |
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| 156 | BetaD = mBetaD(1) ! dimensionless |
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| 157 | rhoSW = mrhoSW(1) ! kg / m3 |
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| 158 | p = mp(1) ! db |
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| 159 | tempis = mtempis(1) ! degrees C |
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| 160 | pco2atm = mpco2atm(1) ! uatm |
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| 161 | fco2atm = mfco2atm(1) ! uatm |
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| 162 | schmidtco2 = mschmidtco2(1) ! dimensionless |
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| 163 | kwco2 = mkwco2(1) ! m / s |
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| 164 | K0 = mK0(1) ! (mol/kg) / atm |
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| 165 | co2starair = mco2starair(1) * 1000. ! mol / m3 -> mmol / m3 |
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| 166 | co2flux = mco2flux(1) * 1000. ! mol / m2 / s -> mmol / m2 / s |
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| 167 | dpco2 = mdpco2(1) ! uatm |
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| 168 | |
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| 169 | IF (lhook) CALL dr_hook(RoutineName,zhook_out ,zhook_handle) |
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| 170 | RETURN |
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| 171 | |
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| 172 | IF (lhook) CALL dr_hook(RoutineName,zhook_out,zhook_handle) |
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| 173 | END SUBROUTINE |
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| 174 | |
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| 175 | !----------------------------------------------------------------------- |
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| 176 | |
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| 177 | !======================================================================= |
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| 178 | ! |
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| 179 | SUBROUTINE mocsy_carbchem( temp, sal, alk, dic, sil, phos, & |
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| 180 | Patm, depth, lat, kw660, xco2, N, & |
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| 181 | ph, pco2, fco2, co2, hco3, co3, OmegaA, & |
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| 182 | OmegaC, BetaD, rhoSW, p, tempis, & |
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| 183 | pco2atm, fco2atm, schmidtco2, kwco2, K0, & |
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| 184 | co2starair, co2flux, dpco2 ) |
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| 185 | ! |
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| 186 | !======================================================================= |
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| 187 | ! |
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| 188 | ! AXY (23/06/15): MOCSY introduced to MEDUSA to update carbonate |
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| 189 | ! chemistry for UKESM1 project |
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| 190 | ! |
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| 191 | ! Orr, J. C. and Epitalon, J.-M.: Improved routines to model the |
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| 192 | ! ocean carbonate system: mocsy 2.0, Geosci. Model Dev., 8, 485-499, |
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| 193 | ! doi:10.5194/gmd-8-485-2015, 2015. |
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| 194 | ! |
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| 195 | ! "mocsy is a Fortran 95 package designed to compute all ocean |
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| 196 | ! carbonate system variables from DIC and total Alk, particularly |
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| 197 | ! from models. It updates previous OCMIP code, avoids 3 common |
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| 198 | ! model approximations, and offers the best-practice constants as |
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| 199 | ! well as more recent options. Its results agree with those from |
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| 200 | ! CO2SYS-MATLAB within 0.005%." |
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| 201 | ! |
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| 202 | ! Where possible the code remains identical to that published by |
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| 203 | ! Orr & Epitalon (2015; henceforth OE15); some consolidation of |
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| 204 | ! MOCSY files has taken place, and the resulting package is |
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| 205 | ! comprised of four modules: |
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| 206 | ! |
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| 207 | ! 1. mocsy_wrapped.f90 |
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| 208 | ! - This module contains the interface between MEDUSA and the |
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| 209 | ! main MOCSY routines; it draws from (but is very different |
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| 210 | ! from) the test_mocsy.f90 routine provided by OE15 |
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| 211 | ! |
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| 212 | ! 2. mocsy_singledouble.f90 |
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| 213 | ! - This module contains only precision definitions; it is |
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| 214 | ! based on the singledouble.f90 routine provided by OE15 |
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| 215 | ! |
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| 216 | ! 3. mocsy_phsolvers.f90 |
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| 217 | ! - This module contains a suite of solvers derived from |
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| 218 | ! Munhoven (2013) and modified by OE15; it is based on the |
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| 219 | ! phsolver.f90 routine provided by OE15 |
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| 220 | ! |
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| 221 | ! 4. mocsy_gasflux.f90 |
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| 222 | ! - This module contains a series of subroutines used to |
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| 223 | ! calculate the air-sea flux of CO2; it consolidates four |
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| 224 | ! MOCSY routines with an OCMIP-2 Schmidt number routine |
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| 225 | ! updated with the new parameterisations of Wanninkhof (2014) |
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| 226 | ! |
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| 227 | ! 5. mocsy_mainmod.f90 |
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| 228 | ! - This module consolidates all of the remaining MOCSY |
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| 229 | ! functions and subroutines from OE15 into a single file |
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| 230 | ! for convenience |
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| 231 | ! |
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| 232 | ! NOTE: it is still possible to run PML's carbonate chemistry |
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| 233 | ! routine in MEDUSA; at present this remains the default, if |
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| 234 | ! less-preferred, routine (i.e. is used if key_mocsy is not |
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| 235 | ! present) |
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| 236 | ! |
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| 237 | !======================================================================= |
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| 238 | ! |
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| 239 | ! AXY (05/04/17): alter options to include optK1K2 = 'w14' |
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| 240 | ! |
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| 241 | ! In conversation with Jim Orr, Waters (2014) is now the |
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| 242 | ! preferred option for optK1K2 in the case of global scale |
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| 243 | ! simulations since this formulation works over broader ranges |
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| 244 | ! of temperature (0 < T < 50) and salinity (1 < S < 50). |
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| 245 | ! |
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| 246 | ! NOTE: *contrary* to the notice above, MEDUSA has now been |
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| 247 | ! revised to remove the PML carbonate chemistry routine as part |
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| 248 | ! of a wider code review. This routine is not anticipated to be |
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| 249 | ! used again, and has several out of date parameterisations |
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| 250 | ! relative to MOCSY. As a result, key_mocsy is no longer required. |
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| 251 | ! |
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| 252 | USE mocsy_singledouble |
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| 253 | USE yomhook, ONLY: lhook, dr_hook |
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| 254 | USE parkind1, ONLY: jprb, jpim |
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| 255 | |
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| 256 | IMPLICIT NONE |
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| 257 | |
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| 258 | !> ====================================================================== |
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| 259 | ! VARIABLES |
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| 260 | !> ====================================================================== |
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| 261 | ! |
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| 262 | ! Input variables |
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| 263 | REAL(kind=wp), INTENT(in), DIMENSION(N) :: temp, sal, alk, dic, sil, phos |
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| 264 | REAL(kind=wp), INTENT(in), DIMENSION(N) :: Patm, depth, lat, kw660, xco2 |
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| 265 | INTEGER, INTENT(in) :: N |
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| 266 | ! |
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| 267 | ! Output variables |
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| 268 | REAL(kind=wp), INTENT(out), DIMENSION(N) :: ph, pco2, fco2, co2, hco3, co3, OmegaA |
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| 269 | REAL(kind=wp), INTENT(out), DIMENSION(N) :: OmegaC, BetaD, rhoSW, p, tempis |
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| 270 | REAL(kind=wp), INTENT(out), DIMENSION(N) :: pco2atm, fco2atm, schmidtco2, kwco2, K0 |
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| 271 | REAL(kind=wp), INTENT(out), DIMENSION(N) :: co2starair, co2flux, dpco2 |
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| 272 | ! |
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| 273 | ! Local variables |
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| 274 | REAL(kind=wp), DIMENSION(N) :: depth0, co2star |
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| 275 | INTEGER :: i, totdat |
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| 276 | ! |
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| 277 | ! "vars" Input options |
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| 278 | CHARACTER(10) :: optCON, optT, optP, optB, optKf, optK1K2 |
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| 279 | INTEGER(KIND=jpim), PARAMETER :: zhook_in = 0 |
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| 280 | INTEGER(KIND=jpim), PARAMETER :: zhook_out = 1 |
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| 281 | REAL(KIND=jprb) :: zhook_handle |
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| 282 | |
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| 283 | CHARACTER(LEN=*), PARAMETER :: RoutineName='MOCSY_CARBCHEM' |
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| 284 | |
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| 285 | IF (lhook) CALL dr_hook(RoutineName,zhook_in,zhook_handle) |
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| 286 | |
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| 287 | ! |
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| 288 | ! initialise depth0 to 0 |
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| 289 | depth0 = 0.0 |
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| 290 | |
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| 291 | !> ====================================================================== |
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| 292 | ! CONFIGURE OPTIONS |
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| 293 | !> ====================================================================== |
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| 294 | !> OPTIONS: see complete documentation in 'vars' subroutine (in mocsy_mainmod.F90) |
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| 295 | !> AXY (05/04/17): optK1K2 switched from 'm10' to 'w14' |
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| 296 | !> Typical options for MODELS |
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| 297 | optCON = 'mol/m3' ! input concentrations are in MOL/M3 |
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| 298 | optT = 'Tpot' ! input temperature, variable 'temp', is POTENTIAL temp [°C] |
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| 299 | optP = 'm' ! input variable 'depth' is in METERS |
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| 300 | optB = 'l10' ! Lee et al. (2010) formulation for total boron |
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| 301 | optK1K2 = 'w14' ! Lueker et al. (2000) formulations for K1 & K2 (best practices) |
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| 302 | optKf = 'dg' ! Dickson & Riley (1979) formulation for Kf (recommended by Dickson & Goyet, 1994) |
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| 303 | !> optK1K2 = 'l' ! Lueker et al. (2000) formulations for K1 & K2 (best practices) |
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| 304 | !> optKf = 'dg' ! Dickson & Riley (1979) formulation for Kf (recommended by Dickson & Goyet, 1994) |
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| 305 | |
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| 306 | !> ====================================================================== |
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| 307 | ! CARBONATE CHEMISTRY CALCULATIONS |
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| 308 | !> ====================================================================== |
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| 309 | !> Call mocsy's main subroutine to compute carbonate system variables: |
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| 310 | !> pH, pCO2, fCO2, CO2*, HCO3- and CO32-, OmegaA, OmegaC, R |
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| 311 | !> FROM temperature, salinity, total alkalinity, dissolved inorganic |
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| 312 | !> carbon, silica, phosphate, depth (or pressure) (1-D arrays) |
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| 313 | call vars(ph, pco2, fco2, co2, hco3, co3, OmegaA, OmegaC, BetaD, rhoSW, p, tempis, & ! OUTPUT |
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| 314 | temp, sal, alk, dic, sil, phos, Patm, depth, lat, N, & ! INPUT |
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| 315 | optCON, optT, optP) |
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| 316 | ! optCON, optT, optP, optB, optK1K2, optKf) ! INPUT OPTIONS |
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| 317 | |
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| 318 | !> ====================================================================== |
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| 319 | ! GAS EXCHANGE CALCULATIONS |
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| 320 | !> ====================================================================== |
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| 321 | !> |
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| 322 | !> Only calculate gas exchange fields if depth = 0 |
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| 323 | if (depth(1) .eq. 0.0) then |
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| 324 | ! |
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| 325 | ! Compute pCO2atm [uatm] from xCO2 [ppm], atmospheric pressure [atm], & vapor pressure of seawater |
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| 326 | ! pCO2atm = (Patm - pH20(i)) * xCO2, where pH20 is the vapor pressure of seawater [atm] |
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| 327 | CALL x2pCO2atm(xco2, temp, sal, Patm, N, & ! INPUT |
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| 328 | pco2atm) ! OUTPUT |
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| 329 | |
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| 330 | ! Compute fCO2atm [uatm] from pCO2atm [uatm] & fugacity coefficient [unitless] |
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| 331 | ! fCO2atm = pCO2atm * fugcoeff, where fugcoeff= exp(Patm*(B + 2.0*xc2*Del)/(R*tk) ) |
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| 332 | CALL p2fCO2(pco2atm, temp, Patm, depth0, N, & ! INPUT |
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| 333 | fco2atm) ! OUTPUT |
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| 334 | |
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| 335 | ! Compute Schmidt number for CO2 from potential temperature |
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| 336 | CALL schmidt_co2(temp, N, & ! INPUT |
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| 337 | schmidtco2) ! OUTPUT |
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| 338 | |
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| 339 | ! Compute transfer velocity for CO2 in m/s (see equation [4] in OCMIP2 design document & OCMIP2 Abiotic HOWTO) |
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| 340 | kwco2 = kw660 * (660./schmidtco2)**0.5 |
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| 341 | |
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| 342 | ! Surface K0 [(mol/kg) / atm] at T, S of surface water |
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| 343 | CALL surface_K0(temp, sal, N, & ! INPUT |
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| 344 | K0) ! OUTPUT |
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| 345 | |
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| 346 | ! "Atmospheric" [CO2*], air-sea CO2 flux, sfc DIC rate of change, & Delta pCO2 |
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| 347 | ! all "lifted" from the gasx.f90 function of MOCSY |
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| 348 | co2starair = K0 * fco2atm * 1.0e-6_wp * rhoSW ! Equil. [CO2*] for atm CO2 at Patm & sfc-water T,S [mol/m3] |
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| 349 | co2star = co2 ! Oceanic [CO2*] in [mol/m3] from vars.f90 |
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| 350 | co2flux = kwco2 * (co2starair - co2star) ! Air-sea CO2 flux [mol/(m2 * s)] |
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| 351 | ! co2ex = co2flux / dz1 ! Change in sfc DIC due to gas exchange [mol/[m3 * s)] |
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| 352 | dpco2 = pco2 - pco2atm ! Delta pCO2 (oceanic - atmospheric pCO2) [uatm] |
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| 353 | ! |
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| 354 | endif |
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| 355 | |
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| 356 | IF (lhook) CALL dr_hook(RoutineName,zhook_out ,zhook_handle) |
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| 357 | RETURN |
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| 358 | |
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| 359 | IF (lhook) CALL dr_hook(RoutineName,zhook_out,zhook_handle) |
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| 360 | END SUBROUTINE |
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| 361 | |
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| 362 | !----------------------------------------------------------------------- |
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| 363 | |
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| 364 | !======================================================================= |
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| 365 | !======================================================================= |
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| 366 | !======================================================================= |
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| 367 | |
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| 368 | # else |
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| 369 | !!====================================================================== |
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| 370 | !! Dummy module : No MOCSY carbonate chemistry |
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| 371 | !!====================================================================== |
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| 372 | |
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| 373 | CONTAINS |
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| 374 | |
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| 375 | SUBROUTINE mocsy_interface( kt ) ! Empty routine |
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| 376 | |
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| 377 | INTEGER, INTENT( in ) :: kt |
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| 378 | INTEGER(KIND=jpim), PARAMETER :: zhook_in = 0 |
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| 379 | INTEGER(KIND=jpim), PARAMETER :: zhook_out = 1 |
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| 380 | REAL(KIND=jprb) :: zhook_handle |
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| 381 | |
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| 382 | CHARACTER(LEN=*), PARAMETER :: RoutineName='MOCSY_INTERFACE' |
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| 383 | |
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| 384 | IF (lhook) CALL dr_hook(RoutineName,zhook_in,zhook_handle) |
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| 385 | |
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| 386 | |
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| 387 | WRITE(*,*) 'mocsy_interface: You should not have seen this print! error?', kt |
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| 388 | |
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| 389 | IF (lhook) CALL dr_hook(RoutineName,zhook_out,zhook_handle) |
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| 390 | END SUBROUTINE mocsy_interface |
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| 391 | #endif |
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| 392 | |
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| 393 | !!====================================================================== |
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| 394 | |
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| 395 | END MODULE mocsy_wrapper |
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