subroutine QSAT (POINTS, LAND_PTS, LAND_INDEX, EPSILON, ZERODEGC
     &,                QS, T, P)

#if defined O_mtlm
!----------------------------------------------------------------------
! CALCULATES A SATURATION MIXING RATIO GIVEN A TEMPERATURE AND PRESSURE
! USING SATURATION VAPOUR PRESSURES CALCULATED USING THE GOFF-GRATCH
! FORMULAE, ADOPTED BY THE WMO AS TAKEN FROM LANDOLT-BORNSTEIN, 1987
! NUMERICAL DATA AND FUNCTIONAL RELATIONSHIPS IN SCIENCE AND TECHNOLOGY.
! GROUP V/VOL 4B METEOROLOGY. PHYSICAL AND CHEMICAL PROPERTIES OF AIR,
! P35 VALUES IN THE LOOKUP TABLE ARE OVER WATER ABOVE 0 DEG C AND OVER
! ICE BELOW THIS TEMPERATURE

!**********************************************************************
! this file is based on code that may have had the following copyright:
! (c) CROWN COPYRIGHT 1997, U.K. METEOROLOGICAL OFFICE.

! Permission has been granted by the authors to the public to copy
! and use this software without charge, provided that this Notice and
! any statement of authorship are reproduced on all copies. Neither the
! Crown nor the U.K. Meteorological Office makes any warranty, express
! or implied, or assumes any liability or responsibility for the use of
! this software.
!**********************************************************************
!----------------------------------------------------------------------

      implicit none

!----------------------------------------------------------------------
! VECTOR LENGTHS AND LOOP COUNTERS
!----------------------------------------------------------------------
! POINTS     = IN Total number of land points.
! LAND_PTS   = IN Number of points on which TRIFFID may operate.
! LAND_INDEX = IN Indices of land points on which TRIFFID may operate.

      integer POINTS, LAND_PTS, LAND_INDEX(POINTS), I, L

!----------------------------------------------------------------------
! VARIABLES
!----------------------------------------------------------------------
! EPSILON  = IN Ratio of molecular weights of water and dry air.
! ZERODEGC = IN Zero Celsius (K).
! T        = IN TEMPERATURE (K)
! P        = IN PRESSURE (PA)
! QS       = OUT SATURATION MIXING RATIO AT TEMPERATURE T AND PRESSURE P
!            (KG/KG)
! OME      = WORK ONE MINUS EPSILON

      real EPSILON, ZERODEGC, T(POINTS), P(POINTS), QS(POINTS), OME

!----------------------------------------------------------------------
! VARIABLES WHICH ARE DEFINED LOCALLY
!----------------------------------------------------------------------
! TFS       = TEMPERATURE AT WHICH SEA WATER FREEZES
! T_LOW     = LOWEST TEMPERATURE FOR WHICH LOOK-UP TABLE OF SATURATION
!             WATER VAPOUR PRESSURE IS VALID (K)
! T_HIGH    = HIGHEST TEMPERATURE FOR WHICH LOOK-UP TABLE OF SATURATION
!             WATER VAPOUR PRESSURES IS VALID (K)
! DELTA_T   = TEMPERATURE INCREMENT OF THE LOOK-UP TABLE OF SATURATION
!             VAPOUR PRESSURES

      real TFS, T_LOW, T_HIGH, DELTA_T
      parameter (TFS=271.35, T_LOW=183.15, T_HIGH=338.15, DELTA_T=0.1)

! N = SIZE OF LOOK-UP TABLE OF SATURATION WATER VAPOUR PRESSURES

      integer N
      parameter (N=((T_HIGH-T_LOW+(DELTA_T*0.5))/DELTA_T)+1.0)

! ITABLE = WORK VARIABLES

      integer ITABLE

! ES     = TABLE OF SATURATION WATER VAPOUR PRESSURE (PA) - SET BY DATA
!          STATEMENT CALCULATED FROM THE GOFF-GRATCH FORMULAE AS TAKEN
!          FROM LANDOLT-BORNSTEIN, 1987 NUMERICAL DATA AND FUNCTIONAL
!          RELATIONSHIPS IN SCIENCE AND TECHNOLOGY. GROUP V/ VOL 4B
!          METEOROLOGY. PHYSICAL AND CHEMICAL PROPERTIES OF AIR, P35
! ATABLE = WORK VARIABLES
! FSUBW  = FACTOR THAT CONVERTS FROM SAT VAPOUR PRESSURE IN A PURE WATER
!          SYSTEM TO SAT VAPOUR PRESSURE IN AIR.

      real ES(N), ATABLE, FSUBW

!----------------------------------------------------------------------
! SATURATION WATER VAPOUR PRESSURE
! ABOVE 0 DEG C VALUES ARE OVER WATER
! BELOW 0 DEC C VALUES ARE OVER ICE
!----------------------------------------------------------------------

      DATA (ES(I),I=    1, 95) /
     *0.966483E-02,0.984279E-02,0.100240E-01,0.102082E-01,0.103957E-01,
     *0.105865E-01,0.107803E-01,0.109777E-01,0.111784E-01,0.113825E-01,
     *0.115902E-01,0.118016E-01,0.120164E-01,0.122348E-01,0.124572E-01,
     *0.126831E-01,0.129132E-01,0.131470E-01,0.133846E-01,0.136264E-01,
     *0.138724E-01,0.141225E-01,0.143771E-01,0.146356E-01,0.148985E-01,
     *0.151661E-01,0.154379E-01,0.157145E-01,0.159958E-01,0.162817E-01,
     *0.165725E-01,0.168680E-01,0.171684E-01,0.174742E-01,0.177847E-01,
     *0.181008E-01,0.184216E-01,0.187481E-01,0.190801E-01,0.194175E-01,
     *0.197608E-01,0.201094E-01,0.204637E-01,0.208242E-01,0.211906E-01,
     *0.215631E-01,0.219416E-01,0.223263E-01,0.227172E-01,0.231146E-01,
     *0.235188E-01,0.239296E-01,0.243465E-01,0.247708E-01,0.252019E-01,
     *0.256405E-01,0.260857E-01,0.265385E-01,0.269979E-01,0.274656E-01,
     *0.279405E-01,0.284232E-01,0.289142E-01,0.294124E-01,0.299192E-01,
     *0.304341E-01,0.309571E-01,0.314886E-01,0.320285E-01,0.325769E-01,
     *0.331348E-01,0.337014E-01,0.342771E-01,0.348618E-01,0.354557E-01,
     *0.360598E-01,0.366727E-01,0.372958E-01,0.379289E-01,0.385717E-01,
     *0.392248E-01,0.398889E-01,0.405633E-01,0.412474E-01,0.419430E-01,
     *0.426505E-01,0.433678E-01,0.440974E-01,0.448374E-01,0.455896E-01,
     *0.463545E-01,0.471303E-01,0.479191E-01,0.487190E-01,0.495322E-01/
      DATA (ES(I),I= 96,190) /
     *0.503591E-01,0.511977E-01,0.520490E-01,0.529145E-01,0.537931E-01,
     *0.546854E-01,0.555924E-01,0.565119E-01,0.574467E-01,0.583959E-01,
     *0.593592E-01,0.603387E-01,0.613316E-01,0.623409E-01,0.633655E-01,
     *0.644053E-01,0.654624E-01,0.665358E-01,0.676233E-01,0.687302E-01,
     *0.698524E-01,0.709929E-01,0.721490E-01,0.733238E-01,0.745180E-01,
     *0.757281E-01,0.769578E-01,0.782061E-01,0.794728E-01,0.807583E-01,
     *0.820647E-01,0.833905E-01,0.847358E-01,0.861028E-01,0.874882E-01,
     *0.888957E-01,0.903243E-01,0.917736E-01,0.932464E-01,0.947407E-01,
     *0.962571E-01,0.977955E-01,0.993584E-01,0.100942E+00,0.102551E+00,
     *0.104186E+00,0.105842E+00,0.107524E+00,0.109231E+00,0.110963E+00,
     *0.112722E+00,0.114506E+00,0.116317E+00,0.118153E+00,0.120019E+00,
     *0.121911E+00,0.123831E+00,0.125778E+00,0.127755E+00,0.129761E+00,
     *0.131796E+00,0.133863E+00,0.135956E+00,0.138082E+00,0.140241E+00,
     *0.142428E+00,0.144649E+00,0.146902E+00,0.149190E+00,0.151506E+00,
     *0.153859E+00,0.156245E+00,0.158669E+00,0.161126E+00,0.163618E+00,
     *0.166145E+00,0.168711E+00,0.171313E+00,0.173951E+00,0.176626E+00,
     *0.179342E+00,0.182096E+00,0.184893E+00,0.187724E+00,0.190600E+00,
     *0.193518E+00,0.196473E+00,0.199474E+00,0.202516E+00,0.205604E+00,
     *0.208730E+00,0.211905E+00,0.215127E+00,0.218389E+00,0.221701E+00/
      DATA (ES(I),I=191,285) /
     *0.225063E+00,0.228466E+00,0.231920E+00,0.235421E+00,0.238976E+00,
     *0.242580E+00,0.246232E+00,0.249933E+00,0.253691E+00,0.257499E+00,
     *0.261359E+00,0.265278E+00,0.269249E+00,0.273274E+00,0.277358E+00,
     *0.281498E+00,0.285694E+00,0.289952E+00,0.294268E+00,0.298641E+00,
     *0.303078E+00,0.307577E+00,0.312135E+00,0.316753E+00,0.321440E+00,
     *0.326196E+00,0.331009E+00,0.335893E+00,0.340842E+00,0.345863E+00,
     *0.350951E+00,0.356106E+00,0.361337E+00,0.366636E+00,0.372006E+00,
     *0.377447E+00,0.382966E+00,0.388567E+00,0.394233E+00,0.399981E+00,
     *0.405806E+00,0.411714E+00,0.417699E+00,0.423772E+00,0.429914E+00,
     *0.436145E+00,0.442468E+00,0.448862E+00,0.455359E+00,0.461930E+00,
     *0.468596E+00,0.475348E+00,0.482186E+00,0.489124E+00,0.496160E+00,
     *0.503278E+00,0.510497E+00,0.517808E+00,0.525224E+00,0.532737E+00,
     *0.540355E+00,0.548059E+00,0.555886E+00,0.563797E+00,0.571825E+00,
     *0.579952E+00,0.588198E+00,0.596545E+00,0.605000E+00,0.613572E+00,
     *0.622255E+00,0.631059E+00,0.639962E+00,0.649003E+00,0.658144E+00,
     *0.667414E+00,0.676815E+00,0.686317E+00,0.695956E+00,0.705728E+00,
     *0.715622E+00,0.725641E+00,0.735799E+00,0.746082E+00,0.756495E+00,
     *0.767052E+00,0.777741E+00,0.788576E+00,0.799549E+00,0.810656E+00,
     *0.821914E+00,0.833314E+00,0.844854E+00,0.856555E+00,0.868415E+00/
      DATA (ES(I),I=286,380) /
     *0.880404E+00,0.892575E+00,0.904877E+00,0.917350E+00,0.929974E+00,
     *0.942771E+00,0.955724E+00,0.968837E+00,0.982127E+00,0.995600E+00,
     *0.100921E+01,0.102304E+01,0.103700E+01,0.105116E+01,0.106549E+01,
     *0.108002E+01,0.109471E+01,0.110962E+01,0.112469E+01,0.113995E+01,
     *0.115542E+01,0.117107E+01,0.118693E+01,0.120298E+01,0.121923E+01,
     *0.123569E+01,0.125234E+01,0.126923E+01,0.128631E+01,0.130362E+01,
     *0.132114E+01,0.133887E+01,0.135683E+01,0.137500E+01,0.139342E+01,
     *0.141205E+01,0.143091E+01,0.145000E+01,0.146933E+01,0.148892E+01,
     *0.150874E+01,0.152881E+01,0.154912E+01,0.156970E+01,0.159049E+01,
     *0.161159E+01,0.163293E+01,0.165452E+01,0.167640E+01,0.169852E+01,
     *0.172091E+01,0.174359E+01,0.176653E+01,0.178977E+01,0.181332E+01,
     *0.183709E+01,0.186119E+01,0.188559E+01,0.191028E+01,0.193524E+01,
     *0.196054E+01,0.198616E+01,0.201208E+01,0.203829E+01,0.206485E+01,
     *0.209170E+01,0.211885E+01,0.214637E+01,0.217424E+01,0.220242E+01,
     *0.223092E+01,0.225979E+01,0.228899E+01,0.231855E+01,0.234845E+01,
     *0.237874E+01,0.240937E+01,0.244040E+01,0.247176E+01,0.250349E+01,
     *0.253560E+01,0.256814E+01,0.260099E+01,0.263431E+01,0.266800E+01,
     *0.270207E+01,0.273656E+01,0.277145E+01,0.280671E+01,0.284248E+01,
     *0.287859E+01,0.291516E+01,0.295219E+01,0.298962E+01,0.302746E+01/
      DATA (ES(I),I=381,475) /
     *0.306579E+01,0.310454E+01,0.314377E+01,0.318351E+01,0.322360E+01,
     *0.326427E+01,0.330538E+01,0.334694E+01,0.338894E+01,0.343155E+01,
     *0.347456E+01,0.351809E+01,0.356216E+01,0.360673E+01,0.365184E+01,
     *0.369744E+01,0.374352E+01,0.379018E+01,0.383743E+01,0.388518E+01,
     *0.393344E+01,0.398230E+01,0.403177E+01,0.408175E+01,0.413229E+01,
     *0.418343E+01,0.423514E+01,0.428746E+01,0.434034E+01,0.439389E+01,
     *0.444808E+01,0.450276E+01,0.455820E+01,0.461423E+01,0.467084E+01,
     *0.472816E+01,0.478607E+01,0.484468E+01,0.490393E+01,0.496389E+01,
     *0.502446E+01,0.508580E+01,0.514776E+01,0.521047E+01,0.527385E+01,
     *0.533798E+01,0.540279E+01,0.546838E+01,0.553466E+01,0.560173E+01,
     *0.566949E+01,0.573807E+01,0.580750E+01,0.587749E+01,0.594846E+01,
     *0.602017E+01,0.609260E+01,0.616591E+01,0.623995E+01,0.631490E+01,
     *0.639061E+01,0.646723E+01,0.654477E+01,0.662293E+01,0.670220E+01,
     *0.678227E+01,0.686313E+01,0.694495E+01,0.702777E+01,0.711142E+01,
     *0.719592E+01,0.728140E+01,0.736790E+01,0.745527E+01,0.754352E+01,
     *0.763298E+01,0.772316E+01,0.781442E+01,0.790676E+01,0.800001E+01,
     *0.809435E+01,0.818967E+01,0.828606E+01,0.838343E+01,0.848194E+01,
     *0.858144E+01,0.868207E+01,0.878392E+01,0.888673E+01,0.899060E+01,
     *0.909567E+01,0.920172E+01,0.930909E+01,0.941765E+01,0.952730E+01/
      DATA (ES(I),I=476,570) /
     *0.963821E+01,0.975022E+01,0.986352E+01,0.997793E+01,0.100937E+02,
     *0.102105E+02,0.103287E+02,0.104481E+02,0.105688E+02,0.106909E+02,
     *0.108143E+02,0.109387E+02,0.110647E+02,0.111921E+02,0.113207E+02,
     *0.114508E+02,0.115821E+02,0.117149E+02,0.118490E+02,0.119847E+02,
     *0.121216E+02,0.122601E+02,0.124002E+02,0.125416E+02,0.126846E+02,
     *0.128290E+02,0.129747E+02,0.131224E+02,0.132712E+02,0.134220E+02,
     *0.135742E+02,0.137278E+02,0.138831E+02,0.140403E+02,0.141989E+02,
     *0.143589E+02,0.145211E+02,0.146845E+02,0.148501E+02,0.150172E+02,
     *0.151858E+02,0.153564E+02,0.155288E+02,0.157029E+02,0.158786E+02,
     *0.160562E+02,0.162358E+02,0.164174E+02,0.166004E+02,0.167858E+02,
     *0.169728E+02,0.171620E+02,0.173528E+02,0.175455E+02,0.177406E+02,
     *0.179372E+02,0.181363E+02,0.183372E+02,0.185400E+02,0.187453E+02,
     *0.189523E+02,0.191613E+02,0.193728E+02,0.195866E+02,0.198024E+02,
     *0.200200E+02,0.202401E+02,0.204626E+02,0.206871E+02,0.209140E+02,
     *0.211430E+02,0.213744E+02,0.216085E+02,0.218446E+02,0.220828E+02,
     *0.223241E+02,0.225671E+02,0.228132E+02,0.230615E+02,0.233120E+02,
     *0.235651E+02,0.238211E+02,0.240794E+02,0.243404E+02,0.246042E+02,
     *0.248704E+02,0.251390E+02,0.254109E+02,0.256847E+02,0.259620E+02,
     *0.262418E+02,0.265240E+02,0.268092E+02,0.270975E+02,0.273883E+02/
      DATA (ES(I),I=571,665) /
     *0.276822E+02,0.279792E+02,0.282789E+02,0.285812E+02,0.288867E+02,
     *0.291954E+02,0.295075E+02,0.298222E+02,0.301398E+02,0.304606E+02,
     *0.307848E+02,0.311119E+02,0.314424E+02,0.317763E+02,0.321133E+02,
     *0.324536E+02,0.327971E+02,0.331440E+02,0.334940E+02,0.338475E+02,
     *0.342050E+02,0.345654E+02,0.349295E+02,0.352975E+02,0.356687E+02,
     *0.360430E+02,0.364221E+02,0.368042E+02,0.371896E+02,0.375790E+02,
     *0.379725E+02,0.383692E+02,0.387702E+02,0.391744E+02,0.395839E+02,
     *0.399958E+02,0.404118E+02,0.408325E+02,0.412574E+02,0.416858E+02,
     *0.421188E+02,0.425551E+02,0.429962E+02,0.434407E+02,0.438910E+02,
     *0.443439E+02,0.448024E+02,0.452648E+02,0.457308E+02,0.462018E+02,
     *0.466775E+02,0.471582E+02,0.476428E+02,0.481313E+02,0.486249E+02,
     *0.491235E+02,0.496272E+02,0.501349E+02,0.506479E+02,0.511652E+02,
     *0.516876E+02,0.522142E+02,0.527474E+02,0.532836E+02,0.538266E+02,
     *0.543737E+02,0.549254E+02,0.554839E+02,0.560456E+02,0.566142E+02,
     *0.571872E+02,0.577662E+02,0.583498E+02,0.589392E+02,0.595347E+02,
     *0.601346E+02,0.607410E+02,0.613519E+02,0.619689E+02,0.625922E+02,
     *0.632204E+02,0.638550E+02,0.644959E+02,0.651418E+02,0.657942E+02,
     *0.664516E+02,0.671158E+02,0.677864E+02,0.684624E+02,0.691451E+02,
     *0.698345E+02,0.705293E+02,0.712312E+02,0.719398E+02,0.726542E+02/
      DATA (ES(I),I=666,760) /
     *0.733754E+02,0.741022E+02,0.748363E+02,0.755777E+02,0.763247E+02,
     *0.770791E+02,0.778394E+02,0.786088E+02,0.793824E+02,0.801653E+02,
     *0.809542E+02,0.817509E+02,0.825536E+02,0.833643E+02,0.841828E+02,
     *0.850076E+02,0.858405E+02,0.866797E+02,0.875289E+02,0.883827E+02,
     *0.892467E+02,0.901172E+02,0.909962E+02,0.918818E+02,0.927760E+02,
     *0.936790E+02,0.945887E+02,0.955071E+02,0.964346E+02,0.973689E+02,
     *0.983123E+02,0.992648E+02,0.100224E+03,0.101193E+03,0.102169E+03,
     *0.103155E+03,0.104150E+03,0.105152E+03,0.106164E+03,0.107186E+03,
     *0.108217E+03,0.109256E+03,0.110303E+03,0.111362E+03,0.112429E+03,
     *0.113503E+03,0.114588E+03,0.115684E+03,0.116789E+03,0.117903E+03,
     *0.119028E+03,0.120160E+03,0.121306E+03,0.122460E+03,0.123623E+03,
     *0.124796E+03,0.125981E+03,0.127174E+03,0.128381E+03,0.129594E+03,
     *0.130822E+03,0.132058E+03,0.133306E+03,0.134563E+03,0.135828E+03,
     *0.137109E+03,0.138402E+03,0.139700E+03,0.141017E+03,0.142338E+03,
     *0.143676E+03,0.145025E+03,0.146382E+03,0.147753E+03,0.149133E+03,
     *0.150529E+03,0.151935E+03,0.153351E+03,0.154783E+03,0.156222E+03,
     *0.157678E+03,0.159148E+03,0.160624E+03,0.162117E+03,0.163621E+03,
     *0.165142E+03,0.166674E+03,0.168212E+03,0.169772E+03,0.171340E+03,
     *0.172921E+03,0.174522E+03,0.176129E+03,0.177755E+03,0.179388E+03/
      DATA (ES(I),I=761,855) /
     *0.181040E+03,0.182707E+03,0.184382E+03,0.186076E+03,0.187782E+03,
     *0.189503E+03,0.191240E+03,0.192989E+03,0.194758E+03,0.196535E+03,
     *0.198332E+03,0.200141E+03,0.201963E+03,0.203805E+03,0.205656E+03,
     *0.207532E+03,0.209416E+03,0.211317E+03,0.213236E+03,0.215167E+03,
     *0.217121E+03,0.219087E+03,0.221067E+03,0.223064E+03,0.225080E+03,
     *0.227113E+03,0.229160E+03,0.231221E+03,0.233305E+03,0.235403E+03,
     *0.237520E+03,0.239655E+03,0.241805E+03,0.243979E+03,0.246163E+03,
     *0.248365E+03,0.250593E+03,0.252830E+03,0.255093E+03,0.257364E+03,
     *0.259667E+03,0.261979E+03,0.264312E+03,0.266666E+03,0.269034E+03,
     *0.271430E+03,0.273841E+03,0.276268E+03,0.278722E+03,0.281185E+03,
     *0.283677E+03,0.286190E+03,0.288714E+03,0.291266E+03,0.293834E+03,
     *0.296431E+03,0.299045E+03,0.301676E+03,0.304329E+03,0.307006E+03,
     *0.309706E+03,0.312423E+03,0.315165E+03,0.317930E+03,0.320705E+03,
     *0.323519E+03,0.326350E+03,0.329199E+03,0.332073E+03,0.334973E+03,
     *0.337897E+03,0.340839E+03,0.343800E+03,0.346794E+03,0.349806E+03,
     *0.352845E+03,0.355918E+03,0.358994E+03,0.362112E+03,0.365242E+03,
     *0.368407E+03,0.371599E+03,0.374802E+03,0.378042E+03,0.381293E+03,
     *0.384588E+03,0.387904E+03,0.391239E+03,0.394604E+03,0.397988E+03,
     *0.401411E+03,0.404862E+03,0.408326E+03,0.411829E+03,0.415352E+03/
      DATA (ES(I),I=856,950) /
     *0.418906E+03,0.422490E+03,0.426095E+03,0.429740E+03,0.433398E+03,
     *0.437097E+03,0.440827E+03,0.444570E+03,0.448354E+03,0.452160E+03,
     *0.455999E+03,0.459870E+03,0.463765E+03,0.467702E+03,0.471652E+03,
     *0.475646E+03,0.479674E+03,0.483715E+03,0.487811E+03,0.491911E+03,
     *0.496065E+03,0.500244E+03,0.504448E+03,0.508698E+03,0.512961E+03,
     *0.517282E+03,0.521617E+03,0.525989E+03,0.530397E+03,0.534831E+03,
     *0.539313E+03,0.543821E+03,0.548355E+03,0.552938E+03,0.557549E+03,
     *0.562197E+03,0.566884E+03,0.571598E+03,0.576351E+03,0.581131E+03,
     *0.585963E+03,0.590835E+03,0.595722E+03,0.600663E+03,0.605631E+03,
     *0.610641E+03,0.615151E+03,0.619625E+03,0.624140E+03,0.628671E+03,
     *0.633243E+03,0.637845E+03,0.642465E+03,0.647126E+03,0.651806E+03,
     *0.656527E+03,0.661279E+03,0.666049E+03,0.670861E+03,0.675692E+03,
     *0.680566E+03,0.685471E+03,0.690396E+03,0.695363E+03,0.700350E+03,
     *0.705381E+03,0.710444E+03,0.715527E+03,0.720654E+03,0.725801E+03,
     *0.730994E+03,0.736219E+03,0.741465E+03,0.746756E+03,0.752068E+03,
     *0.757426E+03,0.762819E+03,0.768231E+03,0.773692E+03,0.779172E+03,
     *0.784701E+03,0.790265E+03,0.795849E+03,0.801483E+03,0.807137E+03,
     *0.812842E+03,0.818582E+03,0.824343E+03,0.830153E+03,0.835987E+03,
     *0.841871E+03,0.847791E+03,0.853733E+03,0.859727E+03,0.865743E+03/
      DATA (ES(I),I=951,1045) /
     *0.871812E+03,0.877918E+03,0.884046E+03,0.890228E+03,0.896433E+03,
     *0.902690E+03,0.908987E+03,0.915307E+03,0.921681E+03,0.928078E+03,
     *0.934531E+03,0.941023E+03,0.947539E+03,0.954112E+03,0.960708E+03,
     *0.967361E+03,0.974053E+03,0.980771E+03,0.987545E+03,0.994345E+03,
     *0.100120E+04,0.100810E+04,0.101502E+04,0.102201E+04,0.102902E+04,
     *0.103608E+04,0.104320E+04,0.105033E+04,0.105753E+04,0.106475E+04,
     *0.107204E+04,0.107936E+04,0.108672E+04,0.109414E+04,0.110158E+04,
     *0.110908E+04,0.111663E+04,0.112421E+04,0.113185E+04,0.113952E+04,
     *0.114725E+04,0.115503E+04,0.116284E+04,0.117071E+04,0.117861E+04,
     *0.118658E+04,0.119459E+04,0.120264E+04,0.121074E+04,0.121888E+04,
     *0.122709E+04,0.123534E+04,0.124362E+04,0.125198E+04,0.126036E+04,
     *0.126881E+04,0.127731E+04,0.128584E+04,0.129444E+04,0.130307E+04,
     *0.131177E+04,0.132053E+04,0.132931E+04,0.133817E+04,0.134705E+04,
     *0.135602E+04,0.136503E+04,0.137407E+04,0.138319E+04,0.139234E+04,
     *0.140156E+04,0.141084E+04,0.142015E+04,0.142954E+04,0.143896E+04,
     *0.144845E+04,0.145800E+04,0.146759E+04,0.147725E+04,0.148694E+04,
     *0.149672E+04,0.150655E+04,0.151641E+04,0.152635E+04,0.153633E+04,
     *0.154639E+04,0.155650E+04,0.156665E+04,0.157688E+04,0.158715E+04,
     *0.159750E+04,0.160791E+04,0.161836E+04,0.162888E+04,0.163945E+04/
      DATA (ES(I),I=1046,1140) /
     *0.165010E+04,0.166081E+04,0.167155E+04,0.168238E+04,0.169325E+04,
     *0.170420E+04,0.171522E+04,0.172627E+04,0.173741E+04,0.174859E+04,
     *0.175986E+04,0.177119E+04,0.178256E+04,0.179402E+04,0.180552E+04,
     *0.181711E+04,0.182877E+04,0.184046E+04,0.185224E+04,0.186407E+04,
     *0.187599E+04,0.188797E+04,0.190000E+04,0.191212E+04,0.192428E+04,
     *0.193653E+04,0.194886E+04,0.196122E+04,0.197368E+04,0.198618E+04,
     *0.199878E+04,0.201145E+04,0.202416E+04,0.203698E+04,0.204983E+04,
     *0.206278E+04,0.207580E+04,0.208887E+04,0.210204E+04,0.211525E+04,
     *0.212856E+04,0.214195E+04,0.215538E+04,0.216892E+04,0.218249E+04,
     *0.219618E+04,0.220994E+04,0.222375E+04,0.223766E+04,0.225161E+04,
     *0.226567E+04,0.227981E+04,0.229399E+04,0.230829E+04,0.232263E+04,
     *0.233708E+04,0.235161E+04,0.236618E+04,0.238087E+04,0.239560E+04,
     *0.241044E+04,0.242538E+04,0.244035E+04,0.245544E+04,0.247057E+04,
     *0.248583E+04,0.250116E+04,0.251654E+04,0.253204E+04,0.254759E+04,
     *0.256325E+04,0.257901E+04,0.259480E+04,0.261073E+04,0.262670E+04,
     *0.264279E+04,0.265896E+04,0.267519E+04,0.269154E+04,0.270794E+04,
     *0.272447E+04,0.274108E+04,0.275774E+04,0.277453E+04,0.279137E+04,
     *0.280834E+04,0.282540E+04,0.284251E+04,0.285975E+04,0.287704E+04,
     *0.289446E+04,0.291198E+04,0.292954E+04,0.294725E+04,0.296499E+04/
      DATA (ES(I),I=1141,1235) /
     *0.298288E+04,0.300087E+04,0.301890E+04,0.303707E+04,0.305529E+04,
     *0.307365E+04,0.309211E+04,0.311062E+04,0.312927E+04,0.314798E+04,
     *0.316682E+04,0.318577E+04,0.320477E+04,0.322391E+04,0.324310E+04,
     *0.326245E+04,0.328189E+04,0.330138E+04,0.332103E+04,0.334073E+04,
     *0.336058E+04,0.338053E+04,0.340054E+04,0.342069E+04,0.344090E+04,
     *0.346127E+04,0.348174E+04,0.350227E+04,0.352295E+04,0.354369E+04,
     *0.356458E+04,0.358559E+04,0.360664E+04,0.362787E+04,0.364914E+04,
     *0.367058E+04,0.369212E+04,0.371373E+04,0.373548E+04,0.375731E+04,
     *0.377929E+04,0.380139E+04,0.382355E+04,0.384588E+04,0.386826E+04,
     *0.389081E+04,0.391348E+04,0.393620E+04,0.395910E+04,0.398205E+04,
     *0.400518E+04,0.402843E+04,0.405173E+04,0.407520E+04,0.409875E+04,
     *0.412246E+04,0.414630E+04,0.417019E+04,0.419427E+04,0.421840E+04,
     *0.424272E+04,0.426715E+04,0.429165E+04,0.431634E+04,0.434108E+04,
     *0.436602E+04,0.439107E+04,0.441618E+04,0.444149E+04,0.446685E+04,
     *0.449241E+04,0.451810E+04,0.454385E+04,0.456977E+04,0.459578E+04,
     *0.462197E+04,0.464830E+04,0.467468E+04,0.470127E+04,0.472792E+04,
     *0.475477E+04,0.478175E+04,0.480880E+04,0.483605E+04,0.486336E+04,
     *0.489087E+04,0.491853E+04,0.494623E+04,0.497415E+04,0.500215E+04,
     *0.503034E+04,0.505867E+04,0.508707E+04,0.511568E+04,0.514436E+04/
      DATA (ES(I),I=1236,1330) /
     *0.517325E+04,0.520227E+04,0.523137E+04,0.526068E+04,0.529005E+04,
     *0.531965E+04,0.534939E+04,0.537921E+04,0.540923E+04,0.543932E+04,
     *0.546965E+04,0.550011E+04,0.553064E+04,0.556139E+04,0.559223E+04,
     *0.562329E+04,0.565449E+04,0.568577E+04,0.571727E+04,0.574884E+04,
     *0.578064E+04,0.581261E+04,0.584464E+04,0.587692E+04,0.590924E+04,
     *0.594182E+04,0.597455E+04,0.600736E+04,0.604039E+04,0.607350E+04,
     *0.610685E+04,0.614036E+04,0.617394E+04,0.620777E+04,0.624169E+04,
     *0.627584E+04,0.631014E+04,0.634454E+04,0.637918E+04,0.641390E+04,
     *0.644887E+04,0.648400E+04,0.651919E+04,0.655467E+04,0.659021E+04,
     *0.662599E+04,0.666197E+04,0.669800E+04,0.673429E+04,0.677069E+04,
     *0.680735E+04,0.684415E+04,0.688104E+04,0.691819E+04,0.695543E+04,
     *0.699292E+04,0.703061E+04,0.706837E+04,0.710639E+04,0.714451E+04,
     *0.718289E+04,0.722143E+04,0.726009E+04,0.729903E+04,0.733802E+04,
     *0.737729E+04,0.741676E+04,0.745631E+04,0.749612E+04,0.753602E+04,
     *0.757622E+04,0.761659E+04,0.765705E+04,0.769780E+04,0.773863E+04,
     *0.777975E+04,0.782106E+04,0.786246E+04,0.790412E+04,0.794593E+04,
     *0.798802E+04,0.803028E+04,0.807259E+04,0.811525E+04,0.815798E+04,
     *0.820102E+04,0.824427E+04,0.828757E+04,0.833120E+04,0.837493E+04,
     *0.841895E+04,0.846313E+04,0.850744E+04,0.855208E+04,0.859678E+04/
      DATA (ES(I),I=1331,1425) /
     *0.864179E+04,0.868705E+04,0.873237E+04,0.877800E+04,0.882374E+04,
     *0.886979E+04,0.891603E+04,0.896237E+04,0.900904E+04,0.905579E+04,
     *0.910288E+04,0.915018E+04,0.919758E+04,0.924529E+04,0.929310E+04,
     *0.934122E+04,0.938959E+04,0.943804E+04,0.948687E+04,0.953575E+04,
     *0.958494E+04,0.963442E+04,0.968395E+04,0.973384E+04,0.978383E+04,
     *0.983412E+04,0.988468E+04,0.993534E+04,0.998630E+04,0.100374E+05,
     *0.100888E+05,0.101406E+05,0.101923E+05,0.102444E+05,0.102966E+05,
     *0.103492E+05,0.104020E+05,0.104550E+05,0.105082E+05,0.105616E+05,
     *0.106153E+05,0.106693E+05,0.107234E+05,0.107779E+05,0.108325E+05,
     *0.108874E+05,0.109425E+05,0.109978E+05,0.110535E+05,0.111092E+05,
     *0.111653E+05,0.112217E+05,0.112782E+05,0.113350E+05,0.113920E+05,
     *0.114493E+05,0.115070E+05,0.115646E+05,0.116228E+05,0.116809E+05,
     *0.117396E+05,0.117984E+05,0.118574E+05,0.119167E+05,0.119762E+05,
     *0.120360E+05,0.120962E+05,0.121564E+05,0.122170E+05,0.122778E+05,
     *0.123389E+05,0.124004E+05,0.124619E+05,0.125238E+05,0.125859E+05,
     *0.126484E+05,0.127111E+05,0.127739E+05,0.128372E+05,0.129006E+05,
     *0.129644E+05,0.130285E+05,0.130927E+05,0.131573E+05,0.132220E+05,
     *0.132872E+05,0.133526E+05,0.134182E+05,0.134842E+05,0.135503E+05,
     *0.136168E+05,0.136836E+05,0.137505E+05,0.138180E+05,0.138854E+05/
      DATA (ES(I),I=1426,1520) /
     *0.139534E+05,0.140216E+05,0.140900E+05,0.141588E+05,0.142277E+05,
     *0.142971E+05,0.143668E+05,0.144366E+05,0.145069E+05,0.145773E+05,
     *0.146481E+05,0.147192E+05,0.147905E+05,0.148622E+05,0.149341E+05,
     *0.150064E+05,0.150790E+05,0.151517E+05,0.152250E+05,0.152983E+05,
     *0.153721E+05,0.154462E+05,0.155205E+05,0.155952E+05,0.156701E+05,
     *0.157454E+05,0.158211E+05,0.158969E+05,0.159732E+05,0.160496E+05,
     *0.161265E+05,0.162037E+05,0.162811E+05,0.163589E+05,0.164369E+05,
     *0.165154E+05,0.165942E+05,0.166732E+05,0.167526E+05,0.168322E+05,
     *0.169123E+05,0.169927E+05,0.170733E+05,0.171543E+05,0.172356E+05,
     *0.173173E+05,0.173993E+05,0.174815E+05,0.175643E+05,0.176471E+05,
     *0.177305E+05,0.178143E+05,0.178981E+05,0.179826E+05,0.180671E+05,
     *0.181522E+05,0.182377E+05,0.183232E+05,0.184093E+05,0.184955E+05,
     *0.185823E+05,0.186695E+05,0.187568E+05,0.188447E+05,0.189326E+05,
     *0.190212E+05,0.191101E+05,0.191991E+05,0.192887E+05,0.193785E+05,
     *0.194688E+05,0.195595E+05,0.196503E+05,0.197417E+05,0.198332E+05,
     *0.199253E+05,0.200178E+05,0.201105E+05,0.202036E+05,0.202971E+05,
     *0.203910E+05,0.204853E+05,0.205798E+05,0.206749E+05,0.207701E+05,
     *0.208659E+05,0.209621E+05,0.210584E+05,0.211554E+05,0.212524E+05,
     *0.213501E+05,0.214482E+05,0.215465E+05,0.216452E+05,0.217442E+05/
      DATA (ES(I),I=1521,1551) /
     *0.218439E+05,0.219439E+05,0.220440E+05,0.221449E+05,0.222457E+05,
     *0.223473E+05,0.224494E+05,0.225514E+05,0.226542E+05,0.227571E+05,
     *0.228606E+05,0.229646E+05,0.230687E+05,0.231734E+05,0.232783E+05,
     *0.233839E+05,0.234898E+05,0.235960E+05,0.237027E+05,0.238097E+05,
     *0.239173E+05,0.240254E+05,0.241335E+05,0.242424E+05,0.243514E+05,
     *0.244611E+05,0.245712E+05,0.246814E+05,0.247923E+05,0.249034E+05,
     *0.250152E+05/

      OME = 1. - EPSILON

!CDIR NODEP
      do L=1,LAND_PTS
        I = LAND_INDEX(L)

!       COMPUTE THE FACTOR THAT CONVERTS FROM SAT VAPOUR PRESSURE
!       IN A PURE WATER SYSTEM TO SAT VAPOUR PRESSURE IN AIR, FSUBW.
!       THIS FORMULA IS TAKEN FROM EQUATION A4.7 OF ADRIAN GILL'S
!       BOOK: ATMOSPHERE-OCEAN DYNAMICS. NOTE THAT HIS FORMULA
!       WORKS IN TERMS OF PRESSURE IN MB AND TEMPERATURE IN CELSIUS,
!       SO CONVERSION OF UNITS LEADS TO THE SLIGHTLY DIFFERENT
!       EQUATION USED HERE.

        FSUBW = 1. + 1.E-8*P(I)*(4.5 + 6.0E-4*(T(I) - ZERODEGC)*
     &          (T(I) - ZERODEGC))

!       USE THE LOOKUP TABLE TO FIND SATURATED VAPOUR PRESSURE,
!       AND STORE IT IN QS.

        if (T(I) .le. T_LOW) then
          QS(I) = ES(1)
        elseif (T(I) .ge. T_HIGH) then
          QS(I) = ES(N)
        else
          ATABLE = (T(I) - T_LOW + DELTA_T) / DELTA_T
          ITABLE = ATABLE
          ATABLE = ATABLE - ITABLE
          QS(I) = (1.0 - ATABLE)*ES(ITABLE) + ATABLE*ES(ITABLE+1)
        endif

!       MULTIPLY BY FSUBW TO CONVERT TO SATURATED VAPOUR PRESSURE
!       IN AIR (EQUATION A4.6 OF ADRIAN GILL'S BOOK).

        QS(I) = QS(I)*FSUBW

!       NOW FORM THE ACCURATE EXPRESSION FOR QS, WHICH IS A
!       REARRANGED VERSION OF EQUATION A4.3 OF GILL'S BOOK.

!       NOTE THAT AT VERY LOW PRESSURES WE APPLY A FIX, TO
!       PREVENT A SINGULARITY.

        if ( P(I) .gt. QS(I) ) then
          QS(I) = (EPSILON*QS(I))/(P(I) - OME*QS(I))
        else
          QS(I) = 1.0
        endif

      enddo
#endif

      return
      end