VERDI not able to read CAMx files

[lizadams]

Describe the bug
VERDI cannot visualize the latest CAMx netCDF files: point source files, meteorological input files, and possibly others.

Please see below:

Example files that VERDI can't load:
Meteorological inputs for test problem (CAMx v7.32)
Other inputs (IC/BC, photolysis, point sources) for test problem (CAMx v7.32)
in. https://www.camx.com/download/camx-test-case/

To Reproduce
Steps to reproduce the behavior:

1. VERDI_2.2/verdi.sh -f $cwd/camx.2d.12km.20160610.nc
2. See error

java.lang.NullPointerException: Cannot invoke "java.lang.Number.doubleValue()" because the return value of "ucar.nc2.Attribute.getNumericValue(int)" is null
	at ucar.nc2.dataset.conv.M3IOConvention.makeZCoordAxis(M3IOConvention.java:245)
	at ucar.nc2.dataset.conv.M3IOConvention.constructCoordAxes(M3IOConvention.java:196)
	at ucar.nc2.dataset.conv.M3IOConvention.augmentDataset(M3IOConvention.java:101)
	at ucar.nc2.dataset.NetcdfDataset.enhance(NetcdfDataset.java:515)
	at ucar.nc2.dataset.NetcdfDataset.<init>(NetcdfDataset.java:1142)
	at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:485)
	at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:634)
	at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:86)
	at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:72)
	at anl.verdi.loaders.NetcdfDatasetFactory.openNetcdfGridDataset(NetcdfDatasetFactory.java:513)
	at anl.verdi.loaders.NetcdfDatasetFactory.createModels3Datasets(NetcdfDatasetFactory.java:175)
	at anl.verdi.loaders.Models3Loader.createDatasets(Models3Loader.java:112)
	at anl.verdi.data.DataManager.createDatasets(DataManager.java:106)
	at anl.verdi.core.VerdiApplication.loadDataset(VerdiApplication.java:647)
	at anl.verdi.commandline.ScriptHandler$2.run(ScriptHandler.java:222)
	at anl.verdi.commandline.ScriptHandler.handleOptions(ScriptHandler.java:1528)
	at anl.verdi.commandline.ScriptHandler.run(ScriptHandler.java:167)
	at anl.verdi.core.VerdiPlugin.run(VerdiPlugin.java:168)
	at saf.core.runtime.CorePlugin.runApplicationRunnable(CorePlugin.java:93)
	at saf.core.runtime.CorePlugin.run(CorePlugin.java:48)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at saf.core.runtime.Boot.run(Boot.java:178)
	at saf.core.runtime.Boot.main(Boot.java:388)
2026.02.26 11:32:14.295 [main] ERROR anl.verdi.loaders.NetcdfDatasetFactory - Error reading netcdf file Cannot invoke "java.lang.Number.doubleValue()" because the return value of "ucar.nc2.Attribute.getNumericValue(int)" is null

ncdump of the file
ncdump camx.2d.12km.20160610.nc | more

netcdf camx.2d.12km.20160610 {
dimensions:
	TSTEP = UNLIMITED ; // (25 currently)
	DATE-TIME = 2 ;
	LAY = 1 ;
	VAR = 17 ;
	ROW = 149 ;
	COL = 152 ;
variables:
	double X(COL) ;
		X:units = "km" ;
		X:long_name = "X coordinate" ;
		X:var_desc = "X cartesian distance from projection origin" ;
	double Y(ROW) ;
		Y:units = "km" ;
		Y:long_name = "Y coordinate" ;
		Y:var_desc = "Y cartesian distance from projection origin" ;
	double layer(LAY) ;
		layer:units = "Layer index" ;
		layer:long_name = "Model layer" ;
		layer:var_desc = "Model layer" ;
	int TFLAG(TSTEP, VAR, DATE-TIME) ;
		TFLAG:units = "YYYYDDD,HHMMSS" ;
		TFLAG:long_name = "Start time flag" ;
		TFLAG:var_desc = "Timestep start date and time" ;
	int ETFLAG(TSTEP, VAR, DATE-TIME) ;
		ETFLAG:units = "YYYYDDD,HHMMSS" ;
		ETFLAG:long_name = "End time flag" ;
		ETFLAG:var_desc = "Timestep end date and time" ;
	double longitude(ROW, COL) ;
		longitude:units = "Degrees east" ;
		longitude:long_name = "Longitude" ;
		longitude:var_desc = "Longitude degrees east" ;
		longitude:coordinates = "latitude longitude" ;
	double latitude(ROW, COL) ;
		latitude:units = "Degrees north" ;
		latitude:long_name = "Latitude" ;
		latitude:var_desc = "Latitude degrees north" ;
		latitude:coordinates = "latitude longitude" ;
	float sfctemperature(TSTEP, LAY, ROW, COL) ;
		sfctemperature:long_name = "surface temperature" ;
		sfctemperature:units = "K                                                           " ;
		sfctemperature:var_desc = "surface temperature" ;
		sfctemperature:coordinates = "latitude longitude" ;

// global attributes:
                :FTYPE = 1 ;
                :CDATE = 2022120 ;
                :CTIME = 110852 ;
                :WDATE = 2022120 ;
                :WTIME = 110852 ;
                :SDATE = 2016162 ;
                :SDATEC = 20160610 ;
                :STIME = 0 ;
                :TSTEP = 10000 ;
                :NTHIK = 1 ;
                :NCOLS = 150 ;
                :NROWS = 147 ;
                :NCOLS_BUF = 152 ;
                :NROWS_BUF = 149 ;
                :NLAYS = 1 ;
                :NVARS = 17 ;
                :GDTYP = 2 ;
                :P_ALP = 45. ;
                :P_BET = 33. ;
                :P_GAM = -97. ;
                :XCENT = -97. ;
                :YCENT = 40. ;
                :XORIG = 468000. ;
                :YORIG = -972000. ;
                :XORIG_BUF = 456000. ;
                :YORIG_BUF = -984000. ;
                :XCELL = 12000. ;
                :YCELL = 12000. ;
                :VGTYP = 6 ;
                :VGTOP = 10000.f ;
                :VGLVLS = 0 ;
                :GDNAM = "" ;
                :UPNAM = "" ;
                :VAR-LIST = "sfctemperature  snowewd         snowage         u10             v10             t2              swsfc           soilmoist       soiltemp        soiltype        pblwrf          pblysu          preciprate      tcloudod        cloudtop        cape            cloudfrac         " ;
                :FILEDESC = "2D METEOROLOGY" ;
                :HISTORY = "Generated by WRFCAMx v5.2 01-10-22" ;
                :IUTM = 0 ;
                :ISTAG = 1 ;
                :CPROJ = 2 ;
                :NSTEPS = 25 ;
                :CAMx_NAME = "2D METEOROLOGY" ;
                :NOTE = "Sample WRFCAMx job" ;
                :ITZON = 0 ;
                :UPDSC = "" ;

Expected behavior
VERDI should load the file properly.

Tested with VERDI 2.2 and VERDI 1.5.

The file that VERDI failed to read is available in this tar.gz file:
camx_test.tar.gz

Additional information
CAMx FAQ: https://www.camx.com/about/faq/

CAMx Latest releases: https://www.camx.com/about/latest-release/

It may be that VERDI stopped reading the CAMx files correctly as of CAMx version 7.0
We have an example CAMx file that uses binary format in the repository that VERDI can read.
./verdi.sh -f $cwd/data/CAMx/camx.example.grd01

https://www.camx.com/Files/Release_notes.v7.00.txt

CAMx now supports netCDF file formats for large gridded input fields
including emissions, meteorology, and initial/boundary conditions. The model
will accept a mix of netCDF or Fortran binary input files for maximum
flexibility and backward compatibility.

Implications: CAMx can be built with netCDF-3 or netCDF-4/HDF5; the latter
allows for data compression using "data chunking".
Uncompressed netCDF files are compatible with Models-3 software
without the need to build CAMx with I/O API libraries.

It may be failing because layer is defined as a double rather than integer.

double layer(LAY) ;
layer:units = "Layer index" ;
layer:long_name = "Model layer" ;
layer:var_desc = "Model layer" ;

[lizadams]

I just tried reading one of the CAMx output files, and VERDI was able to visualize this file.

VERDI_2.2/verdi.sh -f $cwd/CAMx.v7.32.36.12.20160610.avrg.grd01.nc

ncdump CAMx.v7.32.36.12.20160610.avrg.grd01.nc | more

netcdf CAMx.v7.32.36.12.20160610.avrg.grd01 {
dimensions:
	TSTEP = UNLIMITED ; // (24 currently)
	DATE-TIME = 2 ;
	LAY = 1 ;
	VAR = 24 ;
	ROW = 91 ;
	COL = 158 ;
variables:
	double X(COL) ;
		X:units = "km" ;
		X:long_name = "X coordinate" ;
		X:var_desc = "X cartesian distance from projection origin" ;
	double Y(ROW) ;
		Y:units = "km" ;
		Y:long_name = "Y coordinate" ;
		Y:var_desc = "Y cartesian distance from projection origin" ;
	int layer(LAY) ;
		layer:units = "Layer index" ;
		layer:long_name = "Model layer" ;
		layer:var_desc = "Model layer" ;
	int TFLAG(TSTEP, VAR, DATE-TIME) ;
		TFLAG:units = "YYYYDDD,HHMMSS" ;
		TFLAG:long_name = "Start time flag" ;
		TFLAG:var_desc = "Timestep start date and time" ;
	int ETFLAG(TSTEP, VAR, DATE-TIME) ;
		ETFLAG:units = "YYYYDDD,HHMMSS" ;
		ETFLAG:long_name = "End time flag" ;
		ETFLAG:var_desc = "Timestep end date and time" ;
	double longitude(ROW, COL) ;
		longitude:units = "Degrees east" ;
		longitude:long_name = "Longitude" ;
		longitude:var_desc = "Longitude degrees east" ;
		longitude:coordinates = "latitude longitude" ;
	double latitude(ROW, COL) ;
		latitude:units = "Degrees north" ;
		latitude:long_name = "Latitude" ;
		latitude:var_desc = "Latitude degrees north" ;
		latitude:coordinates = "latitude longitude" ;
	float topo(ROW, COL) ;
		topo:units = "m MSL" ;
		topo:long_name = "topographic elevatio" ;
		topo:var_desc = "topographic elevation m above sea level" ;
		topo:coordinates = "latitude longitude" ;
	float z(TSTEP, LAY, ROW, COL) ;
		z:units = "m" ;
		z:long_name = "Layer height" ;
		z:var_desc = "Layer interface heights AGL" ;

// global attributes:
                :FTYPE = 1 ;
                :CDATE = 2025214 ;
                :CTIME = 121145 ;
                :WDATE = 2025214 ;
                :WTIME = 121145 ;
                :SDATE = 2016162 ;
                :STIME = 0 ;
                :TSTEP = 10000 ;
                :NTHIK = 1 ;
                :NCOLS = 158 ;
                :NROWS = 91 ;
                :NLAYS = 1 ;
                :NVARS = 24 ;
                :GDTYP = 2 ;
                :P_ALP = 33. ;
                :P_BET = 45. ;
                :P_GAM = -97. ;
                :XCENT = -97. ;
                :YCENT = 40. ;
                :XORIG = -2556000. ;
                :YORIG = -1872000. ;
                :XCELL = 36000. ;
                :YCELL = 36000. ;
                :VGTYP = 6 ;
                :VGTOP = 10000.f ;
                :VGLVLS = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ;
                :GDNAM = "CAMx v7.32" ;
                :UPNAM = "" ;
                :IOAPI_VERSION = "IOAPI-CAMx" ;
                :EXEC_ID = "CAMx" ;
                :VAR-LIST = "z               NO              NO2             O3              SO2             H2O2            HNO3            NH3             PNO3            PSO4            PNH4            HOA             PEC             FPRM            CPRM            CCRS            FCRS            AOA2            AOA1            BOA2            BOA1            AOA0            IVOA            SVOA            " ;
                :FILEDESC = "AVERAGE" ;
                :HISTORY = "Generated by CAMx v7.32, 08-01-25" ;
                :IUTM = 0 ;
                :ISTAG = 1 ;
                :CPROJ = 2 ;
                :NSTEPS = 24 ;
                :CAMx_NAME = "AVERAGE" ;
                :NOTE = "CAMx 7.32 Test Problem -- CB6R4 CF SOAP 20160610" ;
                :ITZON = 0 ;
                :UPDSC = "" ;
                :GRID_ID = 1 ;
                :I_GRID_START = 1 ;
                :I_GRID_END = 158 ;
                :J_GRID_START = 1 ;
                :J_GRID_END = 91 ;
                :GRID_MESH_FACTOR = 1 ;
                :FLEXI_NEST = 0 ;
                :ADVECTION = "PPM" ;
                :CHEM_SOLVER = "EBI" ;
                :PIG = "NONE" ;
                :PROBING_TOOL = "NONE" ;
                :CHEMISTRY = "CB6r4 + PM (CF3,SOAP3_COMPLX,ISORROPIA) - May 29, 2025" ;
                :TOTAL_SPECIES = 116 ;
                :RADICAL_SPECIES = 25 ;
                :GAS_SPECIES = 98 ;
                :PM_SPECIES = 18 ;
                :REACTIONS = 238 ;
                :DRYDEP = "ZHANG03" ;
                :WETDEP = 1 ;
                :ACM2 = 0 ;
                :CIG_MODEL = 0 ;
                :SURFACE_MODEL = 0 ;
                :INLINE_IX_EMISS = 1 ;
                :BIDI_NH3_DRYDEP = 0 ;
                :STRAT_O3_PROFILE = 0 ;
                :SUPER_STEPPING = 1 ;
                :GRIDDED_EMISS = 1 ;
                :POINT_EMISS = 1 ;
                :IGNORE_EMISS_DATES = 1 ;
                :OUTPUT_3D = 0 ;
                :PIG_SAMPLE_GRID = 0 ;
                :PIG_SAMPLE_BCKGND = 0 ;

<img width="1970" height="1022" alt="Image" src="https://github.com/user-attachments/assets/a1d5e691-eb64-4313-b543-34a972077bc2"

[dkang2]

Tried to read the CAMX example file (/data/CAMx/camx.example.grd01) associated with VERDI release, it worked fine.

[lizadams]

Tested visualizing the ic file and VERDI failed to load it:

verdi -f $cwd/ic.36km.20160610.nc
java.lang.NullPointerException: Cannot invoke "ucar.nc2.Attribute.getNumericValue(int)" because "layers" is null
at ucar.nc2.dataset.conv.M3IOConvention.makeZCoordAxis(M3IOConvention.java:245)
at ucar.nc2.dataset.conv.M3IOConvention.constructCoordAxes(M3IOConvention.java:196)
at ucar.nc2.dataset.conv.M3IOConvention.augmentDataset(M3IOConvention.java:101)
at ucar.nc2.dataset.NetcdfDataset.enhance(NetcdfDataset.java:515)
at ucar.nc2.dataset.NetcdfDataset.(NetcdfDataset.java:1142)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:485)
at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:634)
at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:86)
at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:72)
at anl.verdi.loaders.NetcdfDatasetFactory.openNetcdfGridDataset(NetcdfDatasetFactory.java:513)
at anl.verdi.loaders.NetcdfDatasetFactory.createModels3Datasets(NetcdfDatasetFactory.java:175)
at anl.verdi.loaders.Models3Loader.createDatasets(Models3Loader.java:112)
at anl.verdi.data.DataManager.createDatasets(DataManager.java:106)
at anl.verdi.core.VerdiApplication.loadDataset(VerdiApplication.java:645)
at anl.verdi.commandline.ScriptHandler$2.run(ScriptHandler.java:222)
at anl.verdi.commandline.ScriptHandler.handleOptions(ScriptHandler.java:1528)
at anl.verdi.commandline.ScriptHandler.run(ScriptHandler.java:167)
at anl.verdi.core.VerdiPlugin.run(VerdiPlugin.java:168)
at saf.core.runtime.CorePlugin.runApplicationRunnable(CorePlugin.java:93)
at saf.core.runtime.CorePlugin.run(CorePlugin.java:48)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at saf.core.runtime.Boot.run(Boot.java:178)
at saf.core.runtime.Boot.main(Boot.java:388)
2026.02.26 13:46:36.864 [main] ERROR anl.verdi.loaders.NetcdfDatasetFactory - Error reading netcdf file Cannot invoke "ucar.nc2.Attribute.getNumericValue(int)" because "layers" is null
2026.02.26 13:46:41.270 [main] ERROR anl.verdi.data.DataManager - No loaders are available for the selected file.

I am able to view this file using ncview.

ncdump

netcdf ic.36km.20160610 {

dimensions:
	TSTEP = UNLIMITED ; // (1 currently)
	DATE-TIME = 2 ;
	LAY = 20 ;
	VAR = 57 ;
	ROW = 91 ;
	COL = 158 ;
variables:
	double X(COL) ;
		X:units = "km" ;
		X:long_name = "X coordinate" ;
		X:var_desc = "X cartesian distance from projection origin" ;
	double Y(ROW) ;
		Y:units = "km" ;
		Y:long_name = "Y coordinate" ;
		Y:var_desc = "Y cartesian distance from projection origin" ;
	int layer(LAY) ;
		layer:units = "Layer index" ;
		layer:long_name = "Model layer" ;
		layer:var_desc = "Model layer" ;
	int TFLAG(TSTEP, VAR, DATE-TIME) ;
		TFLAG:units = "YYYYDDD,HHMMSS" ;
		TFLAG:long_name = "Start time flag" ;
		TFLAG:var_desc = "Timestep start date and time" ;
	int ETFLAG(TSTEP, VAR, DATE-TIME) ;
		ETFLAG:units = "YYYYDDD,HHMMSS" ;
		ETFLAG:long_name = "End time flag" ;
		ETFLAG:var_desc = "Timestep end date and time" ;
	double longitude(ROW, COL) ;
		longitude:units = "Degrees east" ;
		longitude:long_name = "Longitude" ;
		longitude:var_desc = "Longitude degrees east" ;
		longitude:coordinates = "latitude longitude" ;
	double latitude(ROW, COL) ;
		latitude:units = "Degrees north" ;
		latitude:long_name = "Latitude" ;
		latitude:var_desc = "Latitude degrees north" ;
		latitude:coordinates = "latitude longitude" ;
	float topo(ROW, COL) ;
		topo:units = "m MSL" ;
		topo:long_name = "topographic elevatio" ;
		topo:var_desc = "topographic elevation m above sea level" ;
		topo:coordinates = "latitude longitude" ;
	float z(TSTEP, LAY, ROW, COL) ;
		z:units = "m" ;
		z:long_name = "Layer height" ;
		z:var_desc = "Layer interface heights AGL" ;
// global attributes:
		:SDATE = 2016162 ;
		:STIME = 0 ;
		:TSTEP = 60000 ;
		:NSTEPS = 1 ;
		:NCOLS = 158 ;
		:NROWS = 91 ;
		:NLAYS = 20 ;
		:NVARS = 57 ;
		:P_ALP = 33. ;
		:P_BET = 45. ;
		:P_GAM = -97. ;
		:XCENT = -97. ;
		:YCENT = 40. ;
		:XORIG = -2556000. ;
		:YORIG = -1872000. ;
		:XCELL = 36000. ;
		:YCELL = 36000. ;
		:CPROJ = 2 ;
		:GDTYP = 2 ;
		:IUTM = 0 ;
		:ISTAG = 1 ;
		:ITZON = 0 ;
		:CAMx_NAME = "INITIAL   " ;
		:NOTE = "Initial Conditions from MOZART2CAMX v4.0 01/11/2021" ;
		:FILEDESC = "INITIAL" ;
		:IOAPI_VERSION = "IOAPI-CAMx" ;
		:EXEC_ID = "MOZART2CAMx_v4.0" ;
		:HISTORY = "Created by MOZART2CAMx_v4.0" ;
		:FTYPE = 1 ;
		:NTHIK = 1 ;
		:VGTYP = 6 ;
		:VGTOP = 0.f ;
		:GDNAM = "MOZART2CAMx_v4.0" ;
		:UPNAM = "MOZART2CAMx_v4.0" ;
		:CDATE = 2022121 ;
		:CTIME = 205310 ;
		:WDATE = 2022121 ;
		:WTIME = 205310 ;
		:VAR-LIST = "z               NO              NO2             O3              H2O2            N2O5            HNO3            PNA            
 PAN             OPAN            CO              PAR             OLE      

[lizadams]

Tried visualizing the point source file:
verdi -f $cwd/point.camx.pt_oilgas.20160611.nc
2026.02.26 13:54:40.879 [main] ERROR anl.verdi.data.DataManager - No loaders are available for the selected file.

ncdump point.camx.pt_oilgas.20160611.nc | more

netcdf point.camx.pt_oilgas.20160611 {
dimensions:
	TSTEP = UNLIMITED ; // (24 currently)
	DATE-TIME = 2 ;
	LAY = 1 ;
	VAR = 59 ;
	ROW = 1 ;
	COL = 31394 ;
variables:
	float xcoord(COL) ;
		xcoord:units = "m" ;
		xcoord:long_name = "source X coordinate" ;
		xcoord:var_desc = "X cartesian distance from projection origin" ;
	float ycoord(COL) ;
		ycoord:units = "m" ;
		ycoord:long_name = "source Y coordinate" ;
		ycoord:var_desc = "Y cartesian distance from projection origin" ;
	float stkheight(COL) ;
		stkheight:units = "m" ;
		stkheight:long_name = "stack height" ;
		stkheight:var_desc = "source stack height" ;
	float stkdiam(COL) ;
		stkdiam:units = "m" ;
		stkdiam:long_name = "stack diameter" ;
		stkdiam:var_desc = "source stack diameter" ;
	float stktemp(COL) ;
		stktemp:units = "K" ;
		stktemp:long_name = "stack temperature" ;
		stktemp:var_desc = "source stack exit temperature" ;
	float stkspeed(COL) ;
		stkspeed:units = "m hr-1" ;
		stkspeed:long_name = "stack exit velocity" ;
		stkspeed:var_desc = "source stack exit velocity" ;
	int pigflag(COL) ;
		pigflag:units = "" ;
		pigflag:long_name = "PiG flag" ;
		pigflag:var_desc = "PiG flag (0=off 1=PiG)" ;
	int saoverride(COL) ;
		saoverride:units = "" ;
		saoverride:long_name = "SA region override" ;
		saoverride:var_desc = "SA region override (0=off)" ;
	int TFLAG(TSTEP, VAR, DATE-TIME) ;
		TFLAG:units = "YYYYDDD,HHMMSS" ;
		TFLAG:long_name = "Start time flag" ;
		TFLAG:var_desc = "Timestep start date and time" ;
	int ETFLAG(TSTEP, VAR, DATE-TIME) ;
		ETFLAG:units = "YYYYDDD,HHMMSS" ;
		ETFLAG:long_name = "End time flag" ;
	float flowrate(TSTEP, COL) ;
		flowrate:units = "m3 hr-1" ;
		flowrate:long_name = "source stack flow ra" ;
		flowrate:var_desc = "source stack flow rate (0=use exit velocity)" ;
	float plumerise(TSTEP, COL) ;
		plumerise:units = "m" ;
		plumerise:long_name = "plume rise override" ;
		plumerise:var_desc = "plume rise override (0=calculate plume rise)" ;
	float plume_bottom(TSTEP, COL) ;
		plume_bottom:units = "m" ;
		plume_bottom:long_name = "plume rise distribut" ;
		plume_bottom:var_desc = "bottom of plume" ;
	float plume_top(TSTEP, COL) ;
		plume_top:units = "m" ;
		plume_top:long_name = "plume rise distribut" ;
		plume_top:var_desc = "top of plume" ;
	float NO(TSTEP, COL) ;
		NO:long_name = "NO" ;
		NO:units = "mol hr-1" ;
		NO:var_desc = "NO emissions" ;
		NO:coordinates = "" ;

// global attributes:
		:SDATE = 2016163 ;
		:STIME = 0 ;
		:TSTEP = 10000 ;
		:NSTEPS = 24 ;
		:NCOLS = 158 ;
		:NROWS = 91 ;
		:NLAYS = 1 ;
		:NVARS = 59 ;
		:P_ALP = 33. ;
		:P_BET = 45. ;
		:P_GAM = -97. ;
		:XCENT = -97. ;
		:YCENT = 40. ;
		:XORIG = -2556000. ;
		:YORIG = -1872000. ;
		:XCELL = 36000. ;
		:YCELL = 36000. ;
		:CPROJ = 2 ;
		:GDTYP = 2 ;
		:IUTM = 0 ;
		:ISTAG = 0 ;
		:ITZON = 0 ;
		:CAMx_NAME = "PTSOURCE" ;
		:NOTE = "/NUMBER OF FILES/   1" ;
		:FILEDESC = "PTSOURCE" ;
		:FTYPE = 1 ;
		:NTHIK = 1 ;
		:VGTYP = 6 ;
		:VGTOP = 10000.f ;
		:VGLVLS = 0, 0 ;
		:GDNAM = "CAMx v7.20" ;
		:UPNAM = "CAMx v7.20" ;
		:CDATE = 2022120 ;
		:CTIME = 115618 ;
		:WDATE = 2022120 ;
		:WTIME = 115618 ;
		:VAR-LIST = "flowrate        plumerise       plume_bottom    plume_top       NO              NO2             OLE             PAR            
 TOL             XYL             FORM            ALD2            ETH             CO              HONO            ISOP            MEOH            ETOH       
     SO2             SULF            ALDX            ETHA            IOLE            TERP            NH3             HCL             CL2             CH4    
         TOLA            ISP             TRP             PSO4            PNO3            POA             PEC             PFE             PMN             PK 
             PCA             PMG             PAL             PSI             PTI             FPRM            CPRM            PRPA            BENZ           
 ETHY            ACET            KET             ECH4            UNR             NVOL            PNH4            PCL             PH2O            NA         
     BNZA            IVOA            " ;