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Please enter folder 'fwdforward' to start working. |
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In this tutorial we will run a forward simulation by releasing some SO2 from the Icelandic volcano Eyjafjallajökull. |
The simulation itself 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 called 'fwfwd_condconc.mv'. For simplicity will use this macro to examine the settings in detail.
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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 : "concentrationconc",
output_flux : "on",
output_trajectory : "on",
output_area : [40,-25,66,10],
output_grid : [0.25,0.25],
output_levels : [500,1000,2000,3000,4000,5000,6000,7000,8000,9000,10000,11000,12000,13000,14000,15000],
release_species : 8,
releases : rel_volcano,
release_units : "mass",
receptor_units : "mass"
)
print(r) |
Here we defined both the input and output path paths and specified the simulation period, the output grid and levels as well. We also told FLEXPART to generate gridded mass concentration and flux fields and plume trajectories on output..
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The actual species that will be released is to release are defined as an integer number (for details about using the species see here). With the default species settings number 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_concfwd'. The computations were actually taken took place in a temporary folder then metview Metview copied the results to the output folder. If we open this older folder 'result_fwd' we will see two three files there:
- conc_s001.grib is a GRIB file containing the gridded concentration fields
- flux_s001.grib is a GRIB file containing the gridded flux fieldstr_r1
- log.csv txt is a CSV file containing the plume trajectoriesthe log file generated by FLEXPART
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Please note that these are not the original outputs form FLEXTRA FLEXPART but were converted to formats more suitable ones for use in Metview. For details about the FLEXPART outputs please click here. |
To process and visualise the results please see these pages:
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