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Time-dependent emissions
Posted: June 18th, 2021, 11:37 am
by klgo
Is there a way of specifying time-dependent emissions (i.e. variable strength, height, composition, ...) right from the start? Or do you need to restart with an adjusted setup for each change in one of the emission parameters (as shown in 16.2)?
Re: Time-dependent emissions
Posted: June 18th, 2021, 11:42 am
by alicec
Yes! Roland will go through this soon.
Section 16.5 on using the EMITIMES file addresses this topic.
Also reference the HYSPLIT users guide.
https://www.ready.noaa.gov/hysplitusersguide/S417.htm
Re: Time-dependent emissions
Posted: June 18th, 2021, 11:59 am
by klgo
Exciting! So in principle that could be used to calculate dispersion from a gridded inventory, couldn't it? Those inventories (e.g. for CH4 emissions) often come in NetCDF format. Are there even tools in HYSPLIT to read such inventories directly or for conversion to EMITIMES format?
Re: Time-dependent emissions
Posted: June 18th, 2021, 1:10 pm
by alicec
Various people have developed their own scripts for converting emission information into an emit-times file.
For instance this has been done for fire-smoke, emissions from power plants, dust, volcanic emissions and more.
No general utility for doing this is supplied with the HYSPLIT distribution as there is just too much variation in the
types and format of information that people use for creating emissions.
However, if you run into specific problems or questions when converting the information in your netcdf files into an emit-times file,
you can certainly ask about it here.
Re: Time-dependent emissions
Posted: June 18th, 2021, 6:21 pm
by Christopher
alicec wrote: ↑June 18th, 2021, 1:10 pm
Various people have developed their own scripts for converting emission information into an emit-times file.
For instance this has been done for fire-smoke, emissions from power plants, dust, volcanic emissions and more.
No general utility for doing this is supplied with the HYSPLIT distribution as there is just too much variation in the
types and format of information that people use for creating emissions.
However, if you run into specific problems or questions when converting the information in your netcdf files into an emit-times file,
you can certainly ask about it here.
So there is no way to give a 2D raster with the same layout of the meteorology to HYSPLIT at each timestep? Not even in ARL format?
Re: Time-dependent emissions
Posted: June 21st, 2021, 6:59 am
by alicec
Could you clarify your question.
The original question was about creating an emit-times file (see
https://www.ready.noaa.gov/hysplitusersguide/S417.htm)
from a netcdf file which has emissions inventory information.
What do you mean by a
"2D raster with the same layout of the meteorology to HYSPLIT at each timestep?"