HYSPLIT Forum: hysplitbbs.arl.noaa.gov

Thanks! But more questions. Actually I'm using this model to study the transport of water vapor. Do you know how does this model deal with the background? I mean the concentration of gas such as water vapor for background. It seems that the decrease rate of the concentration is too big. For example,...

The original unit of emission rate is mass unit/m3. Does anyone know how to change it to ppm?