Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

Horizontal Vs Vertical Advection

This post was from a previous version of the WRF&MPAS-A Support Forum. New replies have been disabled and if you have follow up questions related to this post, then please start a new thread from the forum home page.


New member

I'm a graduate student working on a project about the recent Pacific Northwest heatwave and am trying to calculate the potential temperature budget from a WRF simulation and have two questions.

1) I'm particularly interested in separating the horizontal and vertical advection tendencies. I've found the total advection tendency, called RTHFTEN, and am wondering if there's any way to extract the horizontal and vertical components separately?

2) When I calculate the residual of the theta equation as d theta / dt - advection - Q = Residual, I find that the residual is much larger near the surface and decreases with decreasing pressure. In the above equation advection is RTHFTEN and Q is the sum of other theta tendency terms (RTHBLTEN + RTHRATEN + RTHCUTEN + H_DIABATIC)

Any guidance on either of the two questions would be greatly appreciated, thank you for your time!