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BOXMOX urban plume case
Christoph Knote - 11/2015
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Simulates a classic Lagrangian experiment - an air parcel travels over a city
and picks up emissions, then travels downwind.

* An air parcel is initialized with background level concentrations
* It "travels" for 6 hours w/o any emissions
* "Urban" emissions are injected from hour 6 to hour 9
* The parcel then continues to travel w/o further emissions

Photolysis rates representative for noon during a clear sky day at 40 deg N are
used, and held constant throughout the simulation. For relevant species, a
deposition sink is included. We do not consider any mixing with the environment.

The "box" we imagine has a 1x1 m2 horizontal extent, and its vertical dimension
is from the ground up to the top of the boundary layer. This represents an
always and instantaneously well-mixed boundary layer, the resulting
concentrations are hence representative for mean boundary layer values.

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Set up to be used with the MOZART-4 mechanism. MOZART-T1 should work as well.

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Files used:
 * Deposition.csv
 * Emissions.csv
 * Environment.csv
 * InitialConditions.csv
 * PhotolysisRates.csv

And the BOXMOX.nml namelist.

plot.R is an R script (https://www.r-project.org) to make a nice plot of the
result ("urban_plume.png"). Usage:

> Rscript plot.R

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