Level height for Gh-Pv

Topics about the HYSPLIT dispersion model.
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federica
Posts: 32
Joined: November 12th, 2014, 5:17 pm
Registered HYSPLIT User: Yes

Level height for Gh-Pv

Post by federica »

Hello,

I need to compute the concentration of a pollutant into the atmosphere at certain heights or height intervals.

I'm using INITD=3 (Gaussian horizontal and vertical particle distribution).

From the HYSPLIT user-guide, I read:

22(7)- Height of each level (m)
Default: 50

Output grid levels may be defined in any order for the puff model as long as the deposition level (0) comes first (a
height of zero indicates deposition output). Air concentrations must have a non-zero height defined. A height for
the puff model indicates the concentration at that level. A height for the particle model indicates the average
concentration between that level and the previous level (or the ground for the first level). Therefore heights for the
particle model need to be defined in ascending order. Note that the default is to treat the levels as above-groundlevel (AGL) unless the MSL (above Mean-Sea-Level) flag has been set (see advanced configuration).


In case of INITD=3, do I have to consider the particle case for the definition of the levels? Thus, "a height for the particle model indicates the average
concentration between that level and the previous level".

Many thanks
Best
Federica
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