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The simulation is defined by the 'fwd_conc' FLEXPART Run icon and the 'rel_volcano' FLEXPART Release icon, respectively. Both these are encompassed in a single Macro macro called 'fw_cond.mv'. For simplicity will use this macro to examine the settings in detail.
First we define The macro starts with defining the release like this:
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rel_volcano = flexpart_release( name : "VOLCANO", starting_date : 0, starting_time : 15, ending_date : 2, ending_time : 12, area : [63.63,-19.6,63.63,-19.6], top_level : 9000, bottom_level : 1651, particle_count : 10000, masses : 1000000 ) |
This says that the release will happen over a 45 h period between heights 1651 and 10000 m at the location of the volcano and we will release 1000 tons of material in total.
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Please note that
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#Run flexpart (asynchronous call!) r = flexpart_run( output_path : "result_fwd_conc", input_path : "../data", starting_date : 20120517, starting_time : 12, ending_date : 20120519, ending_time : 12, output_field_type: "concentration", output_flux : "on", output_trajectory : "on", output_area : [40,-25,66,10], output_grid : [0.25,0.25], output_levels : [500,1000,2000,3000,4000,5000,7500,10000,15000], release_species : 8, receptors : "on", receptor_names : ["rec1","rec2"], receptor_latitudes : [60,56.9], receptor_longitudes : [6.43,-3.5], releases : rel_volcano ) print(r) |
Here we defined both the input and output path and specified the simulation period and , the output grid and levels as well. We also told FLEXPART to generate gridded concentration fields and plume trajectories on output. We also asked for plume trajectories and deposition data at the specified receptor locations.
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Please note that the The actual species that will be released is defined as an integer number (for details about using the species see here). With the default species settings 8 stands for SO2. |
If we run this macro (or alternatively right-click execute the FLEXPART Run icon) the results (after a minute or so) will be available in folder 'result_fw_conc' . The computations were actually taken place in a temporary folder then metview copied the results hereto the output folder. If we open this older we will see two files there:
- consconc_s001.grib is GRIB file containing the gridded concentration fields.
- tr_r1.csv is CSV file containing the plume trajectories
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Please note that these are not the original outputs form FLEXTRA but were converted to formats more suitable for use in Metview. For details about the FLEXPART outputs please click here. |
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Forward simultaions
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