This tutorial explains how to use the FLEXPART Lagrangian dispersion model within Metview.

A case study

In this case study will run FLEXPART to simulate the imaginary eruption of the Icelandic volcano Eyjafjallajökull.

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We will run FLEXPART to simulate the release of a volcano eruption by releasing of some SO₂ from the Icelandic volcano Eyjafjallajökull.

The simulation is defined via by the 'fwd_conc' FLEXPART Run icon and the 'rel_volcano' FLEXPART Release icons icon, respectively. Both these are encompassed in the a single Macro called 'fw_cond.mv' Macro. For simplicity will use this macro to show examine the simulation settings in detail. 

First we define the release like this:

rel_volcano = flexpart_release(
	name			:	"REL 1VOLCANO", 
	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			:	1001000000
	)

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 100 kg worth of particles1000 tons of material.

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