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michaesp |
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SUBROUTINE special_stt (flag,cmd,tra,ntim,ncol,
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> vars,times,param,nparam,outfile)
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c ***************************************************************************
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c * *
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c * OUTPUT: flag -> 1 if trajectory is selected, 0 if not *
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c * *
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c * INPUT: cmd <- command string *
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c * tra(ntim,ncol) <- single trajectory: indices time,column *
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c * ntim <- number of times *
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c * ncol <- number of columns (including time,lon,lat,p) *
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c * vars(ncol) <- names of columns *
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c * times(ntim) <- List of times
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c * param(nparam) <- parameter values *
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c * nparam <- number of parameters *
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c * *
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c ***************************************************************************
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implicit none
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c ---------------------------------------------------------------------------
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c Declaration of subroutine parameters
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c ---------------------------------------------------------------------------
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integer flag ! Boolean flag whether trajectory is selected
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character*80 cmd ! Command string
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integer ntim,ncol ! Dimension of single trajectory
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real tra(ntim,ncol) ! Single trajectory
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character*80 vars(ncol) ! Name of columns
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real times(ntim) ! List of times
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integer nparam ! # parameters
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real param(1000) ! List of parameters
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character*80 outfile ! NAme of output file
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integer i,n ! Loop indices
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c ---------------------------------------------------------------------------
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c Local variables for SPECIAL:WCB
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c ---------------------------------------------------------------------------
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integer ip,i0,i1
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c ---------------------------------------------------------------------------
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c Local variables for SPECIAL:STT
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c ---------------------------------------------------------------------------
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integer debugflag
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integer tb,ta !tb and ta are the minimum residence times before and after the exchange
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integer stat, ex, outputflag !Variables for I/O files
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integer labelflag !Flag to handle label field
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integer pvflag, thflag, zflag, pflag !Flags to signal presence of various fields
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integer pvcol,thcol,labelcol,zcol,pcol !Positions of PV, TH, LABEL, z and p columns
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real mean1, mean2, sd1, sd2 !Mean and standard deviations of PV and TH
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real deltat !Trajectory timestep
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real extime, exlon, exlat, exth, exheight, expres!Position at exchange time
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character*80 namefile !Name of output file
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real a,b !Normalized tropopause distance for PV and TH
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real thtrop, pvtrop !Tropopause level in K and pvu
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integer count1, count2
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integer sttcount, p !Ancillary variables in STT do while loop
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real,allocatable, dimension (:) :: tropdist ! Vector for normalized distance from tropopause
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real,allocatable, dimension (:) :: exflag ! Vector for normalized distance from tropopause
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integer, dimension (ntim) :: pos ! Vector to store exchange indices
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c -------------------------------------------------------------------------- %)
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c SPECIAL:STT:pvtrop,thtrop,tmin_b,tmin_f,outputflag %)
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c --------------------------------------------------------------------------- %)
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if ( cmd.eq.'STT' ) then
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c Reset the flag for selection
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flag = 0
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c Reset the flag for debugging
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debugflag = 0
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c Set other flags
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labelflag = 0
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pvflag = 0
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thflag = 0
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C Set data at the exchange
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extime = 0
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exlon = 0
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exlat = 0
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exheight = 0
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expres = 0
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c PV and TH threshold read from command line
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pvtrop = param(1)
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thtrop = param(2)
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c Determine number of time steps in the trajectory
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c Handles backward OR forward trajectories
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if ( (ntim.eq.0).or.(ntim.eq.1) ) then
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print*,' ERROR: zero length trajectory in SPECIAL:STT... Stop' !If there are problems, stop computation.
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stop
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endif
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deltat = (times(ntim)-times(1))/(ntim-1) !By default array indexing starts in Fortran at 1
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C Now some checks for essential fields : label, potential vorticity, potential temperature
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c Check for the presence of the LABEL field
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labelcol = 1
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do i = 1,ncol
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if((vars(i) .eq. 'LABEL').or.(vars(i) .eq. 'label')) then
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labelflag = 1
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labelcol = i
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if(debugflag .eq. 1) then
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print*, 'Found label'
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endif
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endif
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enddo
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c Check for the presence of the variables PV and TH
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pvcol = 1
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thcol = 1
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zcol = 1
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pcol = 1 !In case th or pv are not available, tra(timestep,thcol) is always defined
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do i = 1,ncol
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if((vars(i) .eq. 'PV') .or. (vars(i) .eq. 'POT_VORTI')) then
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pvflag = 1
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pvcol = i
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endif
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enddo
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do i = 1,ncol
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if((vars(i) .eq. 'TH') .or. (vars(i) .eq. 'POT_T')) then
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thflag = 1
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thcol = i
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endif
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enddo
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do i = 1,ncol
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if((vars(i) .eq. 'z') .or. (vars(i) .eq. 'Z')) then
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zcol = i
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zflag = 1
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endif
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enddo
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do i = 1,ncol
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if((vars(i) .eq. 'p') .or. (vars(i) .eq. 'P')) then
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pcol = i
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pflag = 1
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endif
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enddo
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c No PV and THETA available: not possible determining tropopause. Program stop.
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if ( (thflag .eq. 0).and.(pvflag .eq. 0) ) then
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print*,' ERROR: no PV and no TH in SPECIAL:STT..'
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print*,' ERROR: not possible determining tropopause'
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stop
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endif
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c Check for missing data in the trajectories
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do n=1,ntim
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if ((tra(n,pvcol).lt.-500.).and.(pvflag.eq.1.)) then
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if(debugflag .eq. 1) then
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print*,'WARNING: PV missing data',tra(n,pvcol)
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print*,'Trajectory skipped'
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endif
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goto 600
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endif
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if ((tra(n,thcol) .lt.-500.).and.(thflag .eq. 1.)) then
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if(debugflag .eq. 1) then
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print*,'WARNING: TH missing data',tra(n,thcol)
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print*,'Trajectory skipped'
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endif
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goto 600
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endif
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enddo
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c Computing mean of PV and TH along a trajectory
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mean1=0.
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count1=0
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mean2=0.
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count2=0
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do n=1,ntim
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if ((tra(n,pvcol).gt.-100.).and.(pvflag .eq. 1)) then
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count1=count1+1
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mean1=mean1+tra(n,pvcol)
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else
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if(debugflag .eq. 1) then
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print*,'WARNING: PV is missing or non-physical, mean1 = 0'
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endif
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mean1 = 0
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endif
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if ((tra(n,thcol) .gt. 1E-6) .and. (thflag .eq. 1)) then
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count2=count2+1
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mean2=mean2+tra(n,thcol)
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else
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if(debugflag .eq. 1) then
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print*,'WARNING: TH is missing or non-physical, mean1 = 0'
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endif
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mean2 = 0
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endif
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enddo
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c Compute average, otherwise skip problematic trajectories
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if (count1.ne.0) then
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mean1=mean1/count1
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endif
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if (count2.ne.0) then
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mean2=mean2/count2
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endif
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if ( (count1.eq.0) .and. (count2.eq.0) )then
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if(debugflag .eq. 1) then
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print*, 'Trajectory with only missing data skipped'
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endif
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goto 600
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endif
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c Computing standard deviation of PV and TH along a trajectory
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sd1=0.
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count1=0.
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sd2=0.
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count2=0.
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do n=1,ntim
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if (tra(n,pvcol).gt.-100.) then
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count1=count1+1.
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sd1=sd1+(tra(n,pvcol)-mean1)**2
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endif
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if (tra(n,thcol).gt. 0.) then
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count2=count2+1.
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sd2=sd2+(tra(n,thcol)-mean2)**2
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endif
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enddo
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sd1=sqrt(sd1/(count1-1.))
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sd2=sqrt(sd2/(count2-1.))
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c Allocate distance array
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allocate(tropdist(1:ntim),stat=stat)
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if (stat.ne.0) then
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print*,'ERROR: allocating array tropdist
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¬ possible in SPECIAL:STT.. '
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stop
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endif
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c If LABEL is not available, go to section without usage of label
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if(labelflag .ne. 1) goto 300
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C-------------------------------------------------------------------------------------------------------------------------
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c BEGINNING OF THE SECTION WITH LABEL
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C-------------------------------------------------------------------------------------------------------------------------
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c Check for label field
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do i = 1,ntim
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if((tra(i,labelcol) .ne.1) .and. (tra(i,labelcol) .ne.2)) then
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if(debugflag .eq. 1) then
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print*,'WARNING: unexpected label field in SPECIAL:STT.. '
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endif
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print*,'WARNING: unused label field in SPECIAL:STT'
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goto 300
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endif
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end do
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c Distance from the '2 PVU, 380 K' tropopause (-:trop/+:strat) : pvtrop, thtrop if PV and TH and LABEL are available
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280 |
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if ( (pvflag .ne. 0) .and. (thflag .ne. 0) .and.
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&(labelflag .eq. 1)) then
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if(debugflag .eq. 1) then
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print*,'Tropopause detected with PV, TH and LABEL'
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endif
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do n=1,ntim
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a=abs(pvtrop-abs(tra(n,pvcol)))/sd1 ! a = tropdist(PV)
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b=abs(thtrop-tra(n,thcol))/sd2 ! b = tropdist(TH)
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if (tra(n,labelcol) .eq. 1) then ! Troposphere (LABEL)
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tropdist(n)=-min(a,b)
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else
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tropdist(n)=+min(a,b)
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endif
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enddo
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endif
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c If PV is not available, use only TH
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if (pvflag .eq. 0) then
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300 |
if(debugflag .eq. 1) then
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print*,'Tropopause detected with TH only'
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endif
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do n=1,ntim
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b=abs(thtrop-tra(n,thcol))/sd2 ! b = tropdist(TH)
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if(tra(n,labelcol) .eq. 1) then ! Troposphere (TH)
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tropdist(n)= -b
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else
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tropdist(n)= b ! Stratosphere (TH)
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endif
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enddo
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endif
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312 |
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c If TH is not available, use only PV
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314 |
if (thflag .eq. 0) then
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315 |
if(debugflag .eq. 1) then
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print*,'Tropopause detected with PV only'
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endif
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do n=1,ntim
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a=abs(pvtrop-tra(n,pvcol))/sd2 ! a = tropdist(PV)
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320 |
if( (tra(n,pvcol).lt.pvtrop) .and.
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&(tra(n,labelcol) .eq. 1)) then ! Troposphere (PV)
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tropdist(n)= -a
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else
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tropdist(n)= a ! Stratosphere (PV)
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endif
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enddo
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endif
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329 |
C Detecting STT with LABEL field
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330 |
c If PV is lower than pvtrop despite the label is 2, then in next step this potential STT is not considered.
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331 |
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sttcount = 0
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333 |
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334 |
do i=2,ntim
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335 |
if((tropdist(i)*tropdist(i-1) .lt. 0) .and.
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336 |
&(tropdist(i-1) .gt. 0)) then
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C Adding label check for STT
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338 |
if( (tra(i,labelcol) .ne. 1) .and. (tra(i-1,labelcol) .ne. 2)) then
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339 |
if(debugflag .eq. 1) then
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print*, 'STT label check failed:'
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print*, 'moving to next STT candidate'
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endif
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cycle
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else
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sttcount = sttcount+1
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pos(sttcount) = i-1
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endif
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endif
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enddo
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350 |
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351 |
c If no STT is detected, move to next trajectory
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352 |
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353 |
if(sttcount .lt. 1 ) then
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if(debugflag .eq. 1) then
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355 |
print*, 'No STT detected: moving to next trajectory'
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endif
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goto 600
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endif
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359 |
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c Re-connection with normal steps: label has been used
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361 |
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goto 350
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364 |
C-------------------------------------------------------------------------------------------------------------------------
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365 |
C END OF LABEL SECTION
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c-------------------------------------------------------------------------------------------------------------------------
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367 |
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368 |
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369 |
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370 |
c Distance from the '2 PVU, 380 K' tropopause (-:trop/+:strat) : pvtrop, thtrop if PV and TH are available
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|
371 |
300 continue !Here the code continues if no LABEL has been found
|
|
|
372 |
|
|
|
373 |
if ( (pvflag .ne. 0) .and. (thflag .ne. 0)) then
|
|
|
374 |
if(debugflag .eq. 1) then
|
|
|
375 |
print*,'Tropopause detected with PV and TH'
|
|
|
376 |
endif
|
|
|
377 |
do n=1,ntim
|
|
|
378 |
a=abs(pvtrop-abs(tra(n,pvcol)))/sd1 ! a = tropdist(PV)
|
|
|
379 |
b=abs(thtrop-tra(n,thcol))/sd2 ! b = tropdist(TH)
|
|
|
380 |
if ((tra(n,thcol).lt.thtrop).and.
|
|
|
381 |
&(abs(tra(n,pvcol)).lt.pvtrop)) then ! Troposphere (TH and PV) ---------WHY ABS??---------
|
|
|
382 |
tropdist(n)=-min(a,b)
|
|
|
383 |
else
|
|
|
384 |
if ( (abs(tra(n,pvcol)).ge.pvtrop).and.
|
|
|
385 |
&(tra(n,thcol).ge.thtrop) ) then ! Stratosphere (TH and PV)
|
|
|
386 |
tropdist(n)=+min(a,b)
|
|
|
387 |
endif
|
|
|
388 |
|
|
|
389 |
if ( (abs(tra(n,pvcol)).ge.pvtrop).and.
|
|
|
390 |
&(tra(n,thcol).lt.thtrop) ) then ! Stratosphere (PV)
|
|
|
391 |
tropdist(n)=a
|
|
|
392 |
endif
|
|
|
393 |
|
|
|
394 |
if ( (abs(tra(n,pvcol)).lt.pvtrop).and.
|
|
|
395 |
&(tra(n,thcol).ge.thtrop) ) then ! Stratosphere (TH)
|
|
|
396 |
tropdist(n)=b
|
|
|
397 |
endif
|
|
|
398 |
endif
|
|
|
399 |
enddo
|
|
|
400 |
endif
|
|
|
401 |
|
|
|
402 |
c If PV is not available, use only TH
|
|
|
403 |
|
|
|
404 |
if (pvflag .eq. 0) then
|
|
|
405 |
if(debugflag .eq. 1) then
|
|
|
406 |
print*,'Tropopause detected with TH only'
|
|
|
407 |
endif
|
|
|
408 |
do n=1,ntim
|
|
|
409 |
b=abs(thtrop-tra(n,thcol))/sd2 ! b = tropdist(TH)
|
|
|
410 |
if (tra(n,thcol).lt.thtrop) then ! Troposphere (TH)
|
|
|
411 |
tropdist(n)= -b
|
|
|
412 |
else
|
|
|
413 |
tropdist(n)= b ! Stratosphere (TH)
|
|
|
414 |
endif
|
|
|
415 |
enddo
|
|
|
416 |
endif
|
|
|
417 |
|
|
|
418 |
c If TH is not available, use only PV
|
|
|
419 |
if(debugflag .eq. 1) then
|
|
|
420 |
print*,'Tropopause detected with PV only'
|
|
|
421 |
endif
|
|
|
422 |
if (thflag .eq. 0) then
|
|
|
423 |
do n=1,ntim
|
|
|
424 |
a=abs(pvtrop-tra(n,pvcol))/sd2 ! a = tropdist(PV)
|
|
|
425 |
if (tra(n,pvcol).lt.pvtrop) then ! Troposphere (PV)
|
|
|
426 |
tropdist(n)= -a
|
|
|
427 |
else
|
|
|
428 |
tropdist(n)= a ! Stratosphere (PV)
|
|
|
429 |
endif
|
|
|
430 |
enddo
|
|
|
431 |
endif
|
|
|
432 |
|
|
|
433 |
|
|
|
434 |
c Detect the various STT occurrences and save positions in traj file in array pos
|
|
|
435 |
|
|
|
436 |
sttcount = 0
|
|
|
437 |
|
|
|
438 |
do i=2,ntim
|
|
|
439 |
if((tropdist(i)*tropdist(i-1) .lt. 0) .and.
|
|
|
440 |
& (tropdist(i-1) .gt. 0)) then
|
|
|
441 |
sttcount = sttcount+1
|
|
|
442 |
pos(sttcount) = i-1
|
|
|
443 |
endif
|
|
|
444 |
enddo
|
|
|
445 |
|
|
|
446 |
c If no STT are detected, go to next trajectory
|
|
|
447 |
|
|
|
448 |
if(sttcount .lt. 1 ) then
|
|
|
449 |
if(debugflag .eq. 1) then
|
|
|
450 |
print*, 'No STT detected: moving to next trajectory'
|
|
|
451 |
endif
|
|
|
452 |
goto 600
|
|
|
453 |
endif
|
|
|
454 |
|
|
|
455 |
|
|
|
456 |
|
|
|
457 |
350 continue !The same if LABEL is present or not.
|
|
|
458 |
|
|
|
459 |
c In timesteps, minimum residence time before and after the exchange
|
|
|
460 |
|
|
|
461 |
tb = nint( param(3)/deltat )
|
|
|
462 |
ta = nint( param(4)/deltat )
|
|
|
463 |
|
|
|
464 |
|
|
|
465 |
c Now a big while loop analyzing every candidate STT
|
|
|
466 |
|
|
|
467 |
do while(sttcount>0)
|
|
|
468 |
|
|
|
469 |
p = pos(sttcount)
|
|
|
470 |
|
|
|
471 |
c Check whether the trajectory is still in the troposphere after ta timesteps
|
|
|
472 |
|
|
|
473 |
if(ta .ne. 0) then
|
|
|
474 |
do n=1,ta
|
|
|
475 |
if((p+n) .le. ntim) then
|
|
|
476 |
if (tropdist(p)*tropdist(p+n).gt.0.) goto 500 !Try with new STT candidate
|
|
|
477 |
else
|
|
|
478 |
goto 500 !Out of range. Try with new STT candidate
|
|
|
479 |
endif
|
|
|
480 |
enddo
|
|
|
481 |
endif
|
|
|
482 |
|
|
|
483 |
c Check whether the trajectory had been in the stratosphere for at least tb timesteps
|
|
|
484 |
|
|
|
485 |
if(tb .ne. 0) then
|
|
|
486 |
do n=1,tb
|
|
|
487 |
if((p-n) .gt. 0) then
|
|
|
488 |
if (tropdist(p)*tropdist(p-n).lt.0.) goto 500 !Try with new STT candidate
|
|
|
489 |
else
|
|
|
490 |
goto 500 !Out of range. Try with new STT candidate
|
|
|
491 |
endif
|
|
|
492 |
enddo
|
|
|
493 |
endif
|
|
|
494 |
|
|
|
495 |
c If the loops have gone fine, the trajectory is considered, flag = 1, values at the exchange are written and the loop stops.
|
|
|
496 |
|
|
|
497 |
flag = 1
|
|
|
498 |
extime = tra(p,1)
|
|
|
499 |
exlon = tra(p,2)
|
|
|
500 |
exlat = tra(p,3)
|
|
|
501 |
if(zflag .eq. 1) then
|
|
|
502 |
exheight = tra(p,zcol)
|
|
|
503 |
endif
|
|
|
504 |
if(pflag .eq. 1) then
|
|
|
505 |
expres = tra(p,pcol)
|
|
|
506 |
endif
|
|
|
507 |
if(thflag .eq. 1) then
|
|
|
508 |
exth = tra(p,thcol)
|
|
|
509 |
endif
|
|
|
510 |
goto 600
|
|
|
511 |
|
|
|
512 |
500 continue
|
|
|
513 |
sttcount = sttcount-1
|
|
|
514 |
|
|
|
515 |
enddo ! End of do while loop
|
|
|
516 |
|
|
|
517 |
goto 600
|
|
|
518 |
|
|
|
519 |
|
|
|
520 |
|
|
|
521 |
600 continue
|
|
|
522 |
|
|
|
523 |
outputflag = param(5)
|
|
|
524 |
|
|
|
525 |
c Read the name of the file
|
|
|
526 |
|
|
|
527 |
namefile = trim(outfile)//'.stt'
|
|
|
528 |
|
|
|
529 |
if( (flag .eq. 1) .and. (outputflag .eq. 1) ) then
|
|
|
530 |
|
|
|
531 |
if ( nint( param(nparam+1) ).eq.0) then
|
|
|
532 |
open(15,file=namefile,status='replace',
|
|
|
533 |
&position='append', iostat=stat)
|
|
|
534 |
|
|
|
535 |
c ---------------------------------------------------------------
|
|
|
536 |
write(15,*) 'time lon lat height p th'
|
|
|
537 |
write(15,*) '--------------------------------------------'
|
|
|
538 |
write(15,*)
|
|
|
539 |
write(15,'(f7.2,1x,2f8.2,f8.0,9f10.3,5x,i1,4x)')
|
|
|
540 |
&extime,exlon,exlat,exheight,expres,exth
|
|
|
541 |
c ---------------------------------------------------------------
|
|
|
542 |
|
|
|
543 |
close(15)
|
|
|
544 |
param(nparam+1) = 1.
|
|
|
545 |
|
|
|
546 |
else
|
|
|
547 |
|
|
|
548 |
open(15,file=namefile,status='old',
|
|
|
549 |
&position='append', iostat=stat)
|
|
|
550 |
|
|
|
551 |
c ---------------------------------------------------------------
|
|
|
552 |
write(15,'(f7.2,1x,2f8.2,f8.0,9f10.3,5x,i1,4x)')
|
|
|
553 |
&extime,exlon,exlat,exheight,expres,exth
|
|
|
554 |
c ---------------------------------------------------------------
|
|
|
555 |
|
|
|
556 |
close(15)
|
|
|
557 |
endif
|
|
|
558 |
|
|
|
559 |
|
|
|
560 |
|
|
|
561 |
|
|
|
562 |
endif
|
|
|
563 |
|
|
|
564 |
|
|
|
565 |
c Write output if outputflag = 1
|
|
|
566 |
|
|
|
567 |
c outputflag = param(5)
|
|
|
568 |
|
|
|
569 |
c Check for correct inserted parameter
|
|
|
570 |
|
|
|
571 |
c if(debugflag .eq. 1) then
|
|
|
572 |
c if( (outputflag .ne. 0) .and. (outputflag .ne. 1) ) then
|
|
|
573 |
c print*, 'WARNING: last parameter must be either 0 or 1'
|
|
|
574 |
c print*, 'NO data file produced'
|
|
|
575 |
c endif
|
|
|
576 |
c endif
|
|
|
577 |
|
|
|
578 |
c if( (flag .eq. 1) .and. (outputflag .eq. 1) ) then
|
|
|
579 |
|
|
|
580 |
c Read the name of the file
|
|
|
581 |
c namefile = "data_exch_stt" !Maybe write in the command 'name'
|
|
|
582 |
c Open file (already opened before)
|
|
|
583 |
c
|
|
|
584 |
c inquire(file=namefile, exist=ex)
|
|
|
585 |
c if (ex) then
|
|
|
586 |
c open(15,file=namefile, status = 'old',
|
|
|
587 |
c &position='append',iostat=stat)
|
|
|
588 |
c if(stat .eq. -1) then !If the file is empty behave as it was non-existent
|
|
|
589 |
c goto 125
|
|
|
590 |
c endif
|
|
|
591 |
c Write output for trajectory making STT
|
|
|
592 |
c ---------------------------------------------------------------
|
|
|
593 |
c write(15,'(f7.2,1x,2f8.2,f6.0,9f10.3,5x,i1,4x)')
|
|
|
594 |
c &extime,exlon,exlat,exheight,expres,exth
|
|
|
595 |
c ---------------------------------------------------------------
|
|
|
596 |
c write(15,*) ! empty line
|
|
|
597 |
c
|
|
|
598 |
c
|
|
|
599 |
c else
|
|
|
600 |
c
|
|
|
601 |
c First time opening
|
|
|
602 |
c
|
|
|
603 |
c open(15,file=namefile,status='replace',
|
|
|
604 |
c &position='append', iostat=stat)
|
|
|
605 |
c
|
|
|
606 |
c Write title
|
|
|
607 |
c ---------------------------------------------------------------
|
|
|
608 |
c 125 write(15,"(A)") "time lon lat z p th"
|
|
|
609 |
c write(15,"(A)") "-------------------------------------------"
|
|
|
610 |
|
|
|
611 |
c ---------------------------------------------------------------
|
|
|
612 |
c write(15,*) ! empty line
|
|
|
613 |
|
|
|
614 |
c Write output for trajectory making STT
|
|
|
615 |
c ---------------------------------------------------------------
|
|
|
616 |
c write(15,'(f7.2,1x,2f8.2,f6.0,9f10.3,5x,i1,4x)')
|
|
|
617 |
c &extime,exlon,exlat,exheight,expres,exth
|
|
|
618 |
c ---------------------------------------------------------------
|
|
|
619 |
c write(15,*) ! empty line
|
|
|
620 |
c endif
|
|
|
621 |
|
|
|
622 |
|
|
|
623 |
c if (stat .ne. 0) then
|
|
|
624 |
c print *,"ERROR: Problem with output file",namefile
|
|
|
625 |
c stop
|
|
|
626 |
c endif
|
|
|
627 |
c close(15)
|
|
|
628 |
c endif
|
|
|
629 |
|
|
|
630 |
c "Closing" the STT criterion
|
|
|
631 |
endif
|
|
|
632 |
|
|
|
633 |
end
|