HYSPLIT reads in specially packed data files, some of which are available on
our web server.
We have a limited amount of disk space and so generally only the past few years
of EDAS and GDAS data are on-line. Sometimes we have some older data
on-line, but it is usually only there for a short period of time.
If the data is not on-line, you would need to purchase data (prior to 2004) from NCDC and
then run the PC version of HYSPLIT. There is a link to the
PC version of HYSPLIT at
http://www.arl.noaa.gov/ready/hysplit4.html.
Global data from 1995-1996 are called the "MRF Archive", and
from 1997 onward the "FNL Archive". Descriptions of these datasets are at
http://www.arl.noaa.gov/ss/transport/archives.html.