Negative Mass Deposition

Topics about the HYSPLIT dispersion model.
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sjkramer
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Joined: May 10th, 2023, 3:13 pm
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Negative Mass Deposition

Post by sjkramer »

Good Afternoon,

I am running multiple days of HYSPLIT dispersion modeling to get deposition, carrying over particles with pardump and parinit. With the carry over particles, the output deposition (cdump) has both positive negative values. Can someone please help me understand how to interpret why the deposition would have negative in this case?

Any insights will be valuable, thank you!

Control and Setup File Specs for Reference:

echo "$YY $MM $DD 00 " >CONTROL #Starting time (yr,mm,dd,hr,(min optional))
echo "1 ">>CONTROL #Number of starting locations
echo "$olat $olon $lvl1 ">>CONTROL #Starting location (lat, lon, meters)
echo "$run ">>CONTROL #Total run time (hr)
echo "0 ">>CONTROL #Vertical motion option (0:data 1:isob 2:isen 3:dens 4:sigma 5:diverg 6:msl2agl 7:average 8:damped)
echo "$ztop ">>CONTROL #Top of model domain(m)
echo "5 ">>CONTROL #Number of input data grids (default is 1.0)
echo "$MET/ ">>CONTROL #Met data directory
echo "$MetData0 ">>CONTROL #Met data grid filename
echo "$MET/ ">>CONTROL #Met data directory
echo "$MetData6 ">>CONTROL #Met data grid filename
echo "$MET/ ">>CONTROL #Met data directory
echo "$MetData12 ">>CONTROL #Met data grid filename
echo "$MET/ ">>CONTROL #Met data directory
echo "$MetData18 ">>CONTROL #Met data grid filename
echo "$MET/ ">>CONTROL #Met data directory
echo "$MetDataN ">>CONTROL #Met data grid filename
echo "1 ">>CONTROL #Number of different pollutants
echo "TRACER ">>CONTROL #Pollutant
echo "1.0 ">>CONTROL #Emission rate per hr (default is 1.0)
echo "1.0 ">>CONTROL #Hours of emission (default is 1.0)
echo "00 00 00 00 00 ">>CONTROL #? Release start time (0 will result in selecting time of the met data file)
echo "1 ">>CONTROL #Number of simultaneous conc grids
echo "0.0 0.0 ">>CONTROL #? Source location (0 results in selecting emission source location)
echo "0.027 0.027 ">>CONTROL #Grid spacing
echo "15.0 15.0 ">>CONTROL #Grid span
echo "$OUT/ ">>CONTROL #Output directory
echo "cdump${DATE} ">>CONTROL #Conc output file
echo "1 ">>CONTROL #Number of vert conc levels
echo "0 ">>CONTROL #Height of output grid level (0 indicates deposition output)
echo "00 00 00 00 00 ">>CONTROL #Sampling start time
echo "00 00 00 00 00 ">>CONTROL #Sampling stop time
echo "00 24 00 ">>CONTROL #Sampling interval (hr min)
echo "1 ">>CONTROL #Number of pollutants
echo "5.0 6.0 1.0 ">>CONTROL #? Particle diameter (um), density(g/cc), and shape
echo "0.0 0.0 0.0 0.0 0.0 ">>CONTROL #Deposition information
echo "0.0 0.0 0.0 ">>CONTROL #Wet removal
echo "0.0 ">>CONTROL #Radioactive decay half-life (days
echo "0.0 ">>CONTROL #Pollutant Resuspension (1/m)

echo "&SETUP " >SETUP.CFG
echo "kmsl=0, " >>SETUP.CFG #Starting heights default to AGL=0 or MSL=1
echo "ninit=1, " >>SETUP.CFG #Particle initialization (0-none; 1-once; 2-add; 3-replace)
echo "ndump=24, " >>SETUP.CFG #Dump particles to/from file 0-none or nhrs-output interval
echo "ncycl=24, " >>SETUP.CFG #Pardump output cycle time
echo "numpar=$NPAR, " >>SETUP.CFG #Number of puffs or particles to released per cycle
echo "maxpar=50000, " >>SETUP.CFG #Maximum number of particles carried in simulation
echo "pinpf = 'PARINIT', " >>SETUP.CFG #Particle input file name for initialization or boundary conditions
echo "poutf = 'PARDUMP', " >>SETUP.CFG #Particle output file name
echo "/ " >>SETUP.CFG
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