I am sorry for the ignorance of this question, would I use pathlines or streamlines in this case. I have a small box defined in Seeding section, near the surface. I want to perform backward trajectories of the source region of the parcels into the box to determine where these air parcels came from. Would that be a pathline since it is time variant? Thanks for any help
Yes, pathlines can be thought of as the path taken by massless particles advected by the flow