For preparations and running the simulation needed for this tutorial click here ...

To start this tutorial please enter folder 'forward'.

The total column integrated mass is not an output of FLEXPART so we need to compute it. The macro to do the computation and plot the resulting fields is 'plot_total.mv'.

In the macro first we call flexpart_total_column() to compute the "tcmd" fields:

dIn="result_fwd/"
inFile=dIn  & "conc_s001.grib"

#Compute the total column integrated mass
g=flexpart_total_column(source: inFile, param: "mdc")

Next, we define the contouring. The "tcmd" fields have the units of "kg m**-2" but with the current value range "g m**-2" units would better fit for contouring. To achieve it we simply multiply the "tcmd" fieldset with 1000:

g=g*1000

The contour definition itself goes like this:

cont_list=[0.00001,0.0001,0.0005,0.001,0.002,0.005,0.01,0.05]

#Define contour shading
conc_shade = mcont(
	legend							:	"on",
	contour							:	"off",	
	contour_level_selection_type	:	"level_list",
	contour_level_list  			:   cont_list,
	contour_label					:	"off",
	contour_shade					:	"on",
	contour_shade_method			:	"area_fill",
	contour_shade_max_level_colour	:	"red",
	contour_shade_min_level_colour	:	"RGB(0.14,0.37,0.86)",
	contour_shade_colour_direction	:	"clockwise",	
    contour_method					: 	"linear",
    grib_scaling_of_derived_fields	: 	"off"
    )

Next, we build the title with flexpart_build_title(). Please note that we need to explicitly specify the plotting units!

title=flexpart_build_title(data: g,fontsize: 0.3,units: "g m**-2")

Finally we define the map view:

#Define coastlines
coast_grey = mcoast(
	map_coastline_thickness			:	2,
	map_coastline_land_shade		:	"on",
	map_coastline_land_shade_colour	:	"grey",
	map_coastline_sea_shade			:	"on",
	map_coastline_sea_shade_colour	:	"RGB(0.89,0.89,0.89)",
	map_boundaries					:	"on",
	map_boundaries_colour			:	"black",
	map_grid_latitude_increment		:	5,
	map_grid_longitude_increment	:	5
	)

#Define geo view
view = geoview(
	map_area_definition	:	"corners",
	area				:	[40,-25,66,9],
	coastlines			: coast_grey
	)

and generate the plot:

plot(view,g,conc_shade,title)

Having run the macro we will get a plot like this (after navigating to step 39h):