! source file: /sfs/fs6/home-geomar/smomw258/UVic_ESCM/2.9/updates/02/source/mom/checks.F subroutine checks (errorc, vmixset, hmixset) implicit none integer i, k, j, ip, kr, jq, n, num_mw, jb, jjs, jj, ncrow, jw integer je, in, is, numk real critv, t1, dymin, dxmin, jrow, dzmin, xlmax, dtxl, num real dxdymn, fimax, fmax, dysq, dxsq, clix, h1, h2, hx logical errorc, vmixset, hmixset include "size.h" include "param.h" include "pconst.h" include "stdunits.h" include "accel.h" include "coord.h" include "csbc.h" include "grdvar.h" include "hmixc.h" include "iounit.h" include "levind.h" include "isopyc.h" include "mw.h" include "scalar.h" include "switch.h" include "vmixc.h" !----------------------------------------------------------------------- ! do consistency checks !----------------------------------------------------------------------- write (stdout,'(/,20x,a,/)') & 'G E N E R A L C O N S I S T E N C Y C H E C K S' if (imt .lt. 3) then write (stdout,'(/,(1x,a))') & '==> Error: parameter "imt" less than 3 is not allowed ' errorc = .true. endif if (jmt .lt. 4) then write (stdout,'(/,(1x,a))') & '==> Error: parameter "jmt" less than 4 is not allowed ' errorc = .true. endif if (hmixset) then write (stdout,'(/,(1x,a))') & '==> Error: "consthmix" cannot be enabled because another ' &,' horizontal mixing scheme has been enabled ' errorc = .true. else hmixset = .true. endif if (.not.hmixset) then write (stdout,'(/,(1x,a))') & '==> Error: No horizontal mixing scheme has been enabled ' errorc = .true. endif if (vmixset) then write (stdout,'(/,(1x,a))') & '==> Error: "constvmix" cannot be enabled because another ' &,' vertical mixing scheme has been enabled ' errorc = .true. else ! set vmixset = true for enabeling "constvmix" vmixset = .true. endif if (.not.vmixset) then write (stdout,'(/,(1x,a))') & '==> Error: No vertical mixing scheme has been enabled ' errorc = .true. endif if (.not.vmixset) then write (stdout,'(/,(1x,a))') & '==> Error: there is no vertical mixing scheme enabled ' errorc = .true. endif if (jmw .lt. 4) then write (stdout,9000) & '==> Error: the MW can not have fewer than 4 rows when using any' &,' fourth order options ' write (stdout,*)' you have set jmw=',jmw errorc = .true. endif if (jmw .gt. 4) then write (stdout,9000) & '==> Warning: "jmw" > 4 ("jmw"=4 will use the minimum memory) ' write (stdout,*)' you have set jmw=',jmw endif if (jmw .gt. jmt) then write (stdout,9000) & '==> Error: the MW can not have more rows than "jmt" ' write (stdout,*)' you have set jmw=',jmw, ', jmt=',jmt errorc = .true. endif if (jmw .eq. jmt) then write (stdout,9000) & '==> Warning: The MW is open all the way ("jmw" = "jmt") which ' &,' is the maximum memory configuration. Note that ' &,' latitude rows are kept in the MW and not on disk! ' endif if (nkflds .lt. 2) then write (stdout,9000) & '==> Error: "nkflds" must be at least 2 ' write (stdout,*)' nkflds is set = ',nkflds errorc = .true. endif if (dampts(1) .ne. c0 .or. dampts(2) .ne. c0) then write (stdout,9000) & '==> Warning: the damping time scale "dampts" is > zero but ' &,' the "restorst" otpion is not enabled ' endif if (dampdz(1) .ne. c0 .or. dampdz(2) .ne. c0) then write (stdout,9000) & '==> Warning: the damping thickness "dampdz" is > zero but ' &,' the "restorst" otpion is not enabled ' endif write (stdout,9000) & '==> Note: consthmix will only affect mixing of momentum ' &,' since isopycmix was specified for tracer diffusion. ' &,' kappa_h and Ah will be used as background mixing ' &,' coefficients ' write (stdout,9000) & '==> Warning: although "sf_5_point" has no null space, it does ' &,' not conserve total energy. ' if ((ah+ahisop) .gt. 1.e11) then write (stdout,9000) & '==> Error: "ahisop"+"ah" is too large for the ' &,' "isopycmix" mixing option ' errorc = .true. endif if (dtsf .le. c0) then write (stdout,9000) & '==> Error: need to set the external mode time step "dtsf" ' errorc = .true. endif if (dtuv .le. c0) then write (stdout,9000) & '==> Error: need to set the internal mode time step "dtuv" ' errorc = .true. endif if (dtts .le. c0) then write (stdout,9000) & '==> Error: need to set the density time step "dtts" ' errorc = .true. endif critv = 1.e-6 if (mod(rundays,dtts*secday) .gt. critv) then t1 = nint(rundays/(dtts*secday))*dtts*secday write (stdout,9000) & '==> Warning: there must be an integral number of density time ' &,' steps within "rundays" (the integration time). ' write (stdout,*) ' (changed "rundays" from ' &, rundays,' days to ', t1,' days to insure this condition) ' rundays = t1 endif if (itmb) then write (stdout,9000) & '==> Warning: "itmb" is set to "true". set it to "false" in ' &,' subsequent runs to prevent the time independent ' &,' basin mask from being written more than once. ' &,' This reduces the size of the diagnostic file. ' endif if (itrmb) then write (stdout,9000) & '==> Warning: "itrmb" is set to "true". set it to "false" in ' &,' subsequent runs to prevent the time independent ' &,' region masks from being written more than once. ' &,' This reduces the size of the diagnostic file. ' endif if (itavg) then write (stdout,9000) & '==> Warning: "itavg" is set to "true". set it to "false" in ' &,' subsequent runs to prevent the time independent ' &,' region masks from being written more than once. ' &,' This reduces the size of the diagnostic file. ' endif if (tmbint .gt. c0) then write (stdout,9000) & '==> Warning: the averaging interval "tmbint" is > zero but the ' &,' the "meridional_tracer_budget" option is not on. ' endif if (xbtint .ne. c0) then write (stdout,9000) & '==> Warning: the averaging interval "xbtint" is > zero but ' &,' the "xbts" option is not enabled ' endif if (dspint .ne. c0) then write (stdout,9000) & '==> Warning: the averaging interval "dspint" is > zero but ' &,' option "diagnostic_surf_height" is not enabled ' endif if ((dtuv .ne. dtsf) .or. (dtuv .ne. dtts)) then write (stdout,9000) & '==> Warning: use of unequal time steps implies the transient ' &,' response is unimportant and multiple equilibria ' &,' do not exist. ' endif ! check for mixing coefficients larger than stability permits dymin = dyt(2) dxmin = dxt(2) do jrow=2,jmtm1 dymin = min(dymin,dyt(jrow)) enddo do i=2,imtm1 dxmin = min(dxmin,dxt(i)) enddo dzmin = dzt(1) xlmax = dtxcel(1) do k=2,km xlmax = max(xlmax,dtxcel(k)) dzmin = min(dzmin,dzt(k)) enddo if (xlmax .gt. c1) then write (stdout,9000) & '==> Warning: use of accelerated time steps implies the ' &,' transient response is unimportant and multiple ' &,' equilibria do not exist. stability tests will ' &,' use "dtts" multiplied by the maximum "dtxcel" ' endif dtxl = dtts*xlmax num = 0 do j=2,jmtm1 dxdymn = c1/(c1/(dxmin*cst(j))**2 + c1/dymin**2) fimax = 0. do k=1,km do i=2,imtm1 fimax = max(fimax,fisop(i,j,k)) enddo enddo if ((dtxl*(ah+ahisop*fimax))/dxdymn .ge. p25) then num = num + 1 if (num .eq. 1) write (stdout,9000) & '==> Warning: lateral diffusive criteria exceeded for "ah" + ' &,' "ahisop". use a smaller "dtts", "dtxcel", and/or ' &,' "ah" + "ahisop" ' write (stdout,'(a48,f6.2,a5,i3)') ' at latitude ',yt(j) &, ', j=',j endif enddo num = 0 do j=2,jmtm1 dxdymn = c1/(c1/(dxmin*cst(j))**2 + c1/dymin**2) if ((dtuv*am)/dxdymn .ge. p25) then num = num + 1 if (num .eq. 1) write (stdout,9000) & '==> Warning: lateral diffusive criteria exceeded for "am". ' &,' use a smaller "dtuv" and/or "am" ' write (stdout,'(a48,f6.2,a5,i3)') ' at latitude ',yt(j) &, ', j=',j endif enddo if (dzt(1) .lt. 20.0e2) then write (stdout,9000) & '==> Warning: if shallow mixed layers develop, then enabling ' &,' ifdef "shortwave" may help to deepen them. note ' &,' that either you or the atmosphere must provide ' &,' the solar short wave as a boundary condition. ' endif do k=1,km if ((dtts*dtxcel(k)*kappa_h)/dzt(k)**2 .ge. p25) then write (stdout,9000) & '==> Warning: vertical diffusive criteria exceeded on "kappa_h" ' &,' use a smaller "dtts", "dtxcel", and/or "kappa_h" ' write (stdout,'(a48,i3)') ' at level =',k endif enddo if ((dtuv*kappa_m)/dzmin**2 .ge. p25) then write (stdout,9000) & '==> Warning: vertical diffusive criteria exceeded on "kappa_m" ' &,' use a smaller "dtuv" and/or "kappa_m" ' endif write (stdout,9000) & '==> Warning: the full convective scheme is enabled. ' &,' it will ignore "ncon" and remove all instability ' ! check range of implicit factors if (acor .ne. 0) then write (stdout,9000) & '==> Error: "acor" must=0 when option damp_inertial_oscillation ' &,' is not enabled. ' errorc = .true. else ! check for marginally resolved inertial oscillation fmax = epsln do jrow=2,jmtm1 do i=2,imtm1 fmax = max(fmax,abs(cori(i,jrow,1))) enddo enddo if (dtuv .gt. (1.0/6.0)*(c2*pi)/fmax) then write (stdout,9000) & '==> Error: the inertial oscillation is not resolved. reduce ' &,' "dtuv" or use option "damp_inertial_oscillation" ' errorc = .true. endif endif !----------------------------------------------------------------------- ! search for topographic instabilities (based on the work of ! Peter Killworth ... eqn 11 from ocean modeling nov 1987) !----------------------------------------------------------------------- num = 50 do j=2,jmtm1 dysq = dyt(j)**2 do i=2,imtm1 if (kmu(i+1,j-1) .ne. 0 .and. kmu(i+1,j) .ne. 0) then dxsq = (dxt(i)*cst(j))**2 clix = am*dtuv/dxsq h1 = zw(kmu(i+1,j-1)) h2 = zw(kmu(i+1,j)) hx = (8.0*h1*h2/(h1+h2)**2 + dxsq/dysq)/(4.0 + dxsq/dysq) if (clix .ge. hx .and. num .ge. 0) then num = num - 1 write(stdout,*) write (stdout,'(a,a,i4,a,i4,a)') & '==> Warning: Killworth topographic roughness condition' &, ' exceeded at location (i,j) = (',i+1,',',j,')' if (num .eq. 0) then write (stdout,9000) & '==> Warning: msgs terminated after 50 cases were found ' endif endif endif enddo enddo ! verify that the domain boundary is valid in = 0 is = 0 do i=1,imt if (kmt(i,1) .ne. 0) is = i if (kmt(i,jmt) .ne. 0) in = i enddo if (is .ne. 0) then errorc = .true. write (stdout,9000) & '==> Error: The basin is not closed. "kmt" is non zero along ' &,' the southern boundary. ' write (stdout,*) ' at j=1 and i=',is endif if (in .ne. 0) then errorc = .true. write (stdout,9000) & '==> Error: The basin is not closed. "kmt" is non zero along ' &,' the northern boundary. ' write (stdout,*) ' at j=jmt and i=',in endif ! verify that each ocean point is at least 2 levels deep numk = 0 do jrow=1,jmt do i=1,imt if (kmt(i,jrow) .eq. 1) then numk = numk + 1 errorc = .true. write (stdout,*) & ' Error: kmt(',i,',',jrow,') = 1 is not allowed ' endif enddo enddo if (numk .ne. 0) then write (stdout,9000) & '==> Error: "kmt" must be at least 2 levels deep at all ocean ' &,' points. ' endif write (stdout,9000) & '==> Warning: fct delimiter type is not specified ' &,' specify either fct_dlm1 or fct_dlm2 ' &,' Default: using fct_dlm1 ' write (stdout,'(/,20x,a,/)') & ' E N D C O N S I S T E N C Y C H E C K S' if (errorc) stop '=>checks' 9000 format (/,(1x,a)) return end