Generic Guidance and Optimum Model Settings for the CALPUFF ...

Run Type Description of
Run Type
Observations
Only
CALMET
driven solely by
surface, upper
air and optional
overwater and
precipitation
stations
Ease of Use and
Representativeness
Complicated due to: - data
preparation, 7 site-specific
variable choices to be
made, difficulty in dealing
with missing data.
Considered representative
if sufficient observation
stations and site specific
choice of parameters by
the modeller.
Data availability Advantages Disadvantages
Any number of Surface
stations + upper air stations
(usually 12 hourly) +
precipitation stations
(optional) + overwater data
(optional)
16
Observation data when 3D
data is too coarse to fully
pick up local effects.
Very good if upper air and
surface stations are located
close to the facility and if
upper air data are recorded
at sunrise and sunset.
� Surface data,
especially winds
may be different
to that in the
3D.DAT file.
� Upper air
data typically 12
hourly, poor
spatial and
temporal
resolution
� Model has to
interpolate
between 12 hour
soundings
� Soundings at
incorrect time of
the day.
� User has to
deal with missing
surface and upper
air data