********************************************************************************
*                                                                              *
*      Input file for the Lagrangian particle dispersion model FLEXPART        *
*                           Please select your options                         *
*                                                                              *
********************************************************************************

1. __                3X, I2
    1       
   DIRECTION         1 FOR FORWARD SIMULATION, -1 FOR BACKWARD SIMULATION

2. ________ ______   3X, I8, 1X, I6
   20011028 150000
   YYYYMMDD HHMISS   BEGINNING DATE OF SIMULATION

3. ________ ______   3X, I8, 1X, I6
   20011029 150000
   YYYYMMDD HHMISS   ENDING DATE OF SIMULATION

4. _____             3X, I5
   21600 
   SSSSS             OUTPUT EVERY SSSSS SECONDS

5. _____             3X, I5
   21600 
   SSSSS             TIME AVERAGE OF OUTPUT (IN SSSSS SECONDS)

6. _____             3X, I5
     900 
   SSSSS             SAMPLING RATE OF OUTPUT (IN SSSSS SECONDS)

7. _______           3X, I7
   9999999
   SSSSSSS           TIME CONSTANT FOR PARTICLE SPLITTING (IN SECONDS)

8. _____             3X, I5
     900 
   SSSSS             SYNCHRONISATION INTERVAL OF FLEXPART (IN SECONDS)

9.  ---.--           4X, F6.4
     -5.0
    CTL              FACTOR, BY WHICH TIME STEP MUST BE SMALLER THAN TL

10. ---              4X, I3
      4
    IFINE            DECREASE OF TIME STEP FOR VERTICAL MOTION BY FACTOR IFINE

11. -                4X, I1
    5  
    IOUT             1 CONCENTRATION (RESIDENCE TIME FOR BACKWARD RUNS) OUTPUT, 2 MIXING RATIO OUTPUT, 3 BOTH,4 PLUME TRAJECT., 5=1+4

12. -                4X, I1
    2  
    IPOUT            PARTICLE DUMP: 0 NO, 1 EVERY OUTPUT INTERVAL, 2 ONLY AT END

13. _                4X, I1
    1
    LSUBGRID         SUBGRID TERRAIN EFFECT PARAMETERIZATION: 1 YES, 0 NO

14. _                4X, I1
    1
    LCONVECTION      CONVECTION: 1 YES, 0 NO

15. _                4X, I1
    1
    LAGESPECTRA      AGE SPECTRA: 1 YES, 0 NO

16. _                4X, I1
    0
    IPIN             CONTINUE SIMULATION WITH DUMPED PARTICLE DATA: 1 YES, 0 NO

17. _                4X, I1
    0
    IFLUX            CALCULATE FLUXES: 1 YES, 0 NO

1. Simulation direction, 1 for forward, -1 for backward in time

2. Beginning date and time of simulation. Must be given in format
   YYYYMMDD HHMISS, where YYYY is YEAR, MM is MONTH, DD is DAY, HH is HOUR,
   MI is MINUTE and SS is SECOND. Current version utilizes UTC.

3. Ending date and time of simulation. Same format as 3.

4. Average concentrations are calculated every SSSSS seconds.

5. The average concentrations are time averages of SSSSS seconds
   duration. If SSSSS is 0, instantaneous concentrations are outputted.

6. The concentrations are sampled every SSSSS seconds to calculate the time
   average concentration. This period must be shorter than the averaging time.

7. Time constant for particle splitting. Particles are split into two
   after SSSSS seconds, 2xSSSSS seconds, 4xSSSSS seconds, and so on.

8. All processes are synchronized with this time interval (lsynctime).
   Therefore, all other time constants must be multiples of this value.
   Output interval and time average of output must be at least twice lsynctime.

9. CTL must be >1 for time steps shorter than the  Lagrangian time scale
   If CTL<0, a purely random walk simulation is done

10.IFINE=Reduction factor for time step used for vertical wind

11.IOUT determines how the output shall be made: concentration
   (ng/m3, Bq/m3), mixing ratio (pptv), or both, or plume trajectory mode,
   or concentration + plume trajectory mode.
   In plume trajectory mode, output is in the form of average trajectories.

12.IPOUT determines whether particle positions are outputted (in addition
   to the gridded concentrations or mixing ratios) or not.
   0=no output, 1 output every output interval, 2 only at end of the
   simulation

13.Switch on/off subgridscale terrain parameterization (increase of
   mixing heights due to subgridscale orographic variations)

14.Switch on/off the convection parameterization

15.Switch on/off the calculation of age spectra: if yes, the file AGECLASSES
   must be available

16. If IPIN=1, a file "partposit_end" from a previous run must be available in
    the output directory. Particle positions are read in and previous simulation
    is continued. If IPIN=0, no particles from a previous run are used

17. If IFLUX is set to 1, fluxes of each species through each of the output
    boxes are calculated. Six fluxes, corresponding to northward, southward,
    eastward, westward, upward and downward are calculated for each grid cell of
    the output grid. The control surfaces are placed in the middle of each
    output grid cell. If IFLUX is set to 0, no fluxes are determined.
