HYSPLIT Forum: hysplitbbs.arl.noaa.gov

Interesting. This is probably because the computational particles deposited on the water surface are not undergoing dispersion, only advection by the mean winds. With no dispersion, dilution of the material will be much less. https://www.ready.noaa.gov/hysplitusersguide/S441.htm#sfc_water Transport ...

Could you be more specific about what you expect to see versus what you are seeing?
Can you attach a screenshot?

Yes, it's almost certainly possible. The general steps to converting any meteorological dataset are the following 1. Identify the projection. HYSPLIT currently can handle a regular latitude longitude grid or conformal projection. 2. identify how the vertical levels are represented. For instance the ...

We do not maintain a converter specifically for ICON because we do not have regular access to it. We have assisted in helping people get the api2arl to work for ICON grib2 files. You could probably modify the arw2arl to work with other netcdf files. Generally it takes a bit of knowledge of the forma...

Hello,
thanks for the in depth analysis of the problem.
We appreciate it if you don't post the source code here.
Please email arl.webmaster@noaa.gov as we would like to consider incorporating changes
into future versions of HYSPLIT.

Yes, similar to the leap year problem, HYPSLIT will terminate if it cannot find meteorological data covering the next time period that it expects (e.g. if a month that is supposed to have 31 days only has 30). I think the best course of action would be the following. It's a bit laborious, but with s...

It sounds like something went wrong in the conversion so the times in the ARL files are not consistent. Try using some of the utilities listed here under 'Meteorological Data Examination' to test the ARL files. For instance chk_times or profile or chk_file. https://www.ready.noaa.gov/hysplitusersgui...

Yes - that is almost certainly the issue. HYSPLIT will not recognize a modified calendar. For instance the CAM model had a related issue in that it doesn't follow the normal calendar for leap years. the work-around was to just change the year to one which was not a leap year. https://hysplitbbs.arl....

Could you provide more context on what you are trying to do? For a forward dispersion run, one needs to provide the model with emission estimates - that is the location(s) of the source(s) and approximate emission rate. Sometimes people will use some kind of emissions inventory for this. If you have...

If you want to get mixing ratios as output rather than concentration in mass/volume then you can use the ichem=6 setting in the SETUP.CFG file. See here for details. https://www.ready.noaa.gov/hysplitusersguide/S628.htm to get a 3d concentration grid, simply define more than one height level in the ...