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

How to find the top level of the planetary boundary layer in WRF?

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 working on WRF Chem and want to calculate CO2 concentrations only in the Planetary Boundary Layer (I mean, I want to calculate CO2 from surface to top of PBL). WRF (Wide Range Forecasting) How do I compute the PBL level? We have (PBLH: the height of PBL in WRF, but it doesn't tell us what the top level of PBL is as compared to all other levels in the model?). Like a payday loan at There are 37 vertical levels in my model. f I'll calculate the pressure weight of its level and the contribution of PBL concentration now that I know the level of PBL. How can I calculate the CO2 concentration in PBL height based on the weight of the PBL layer? Thank you for all of your help.
You may look at the height of each model levels by (ph + phb)/9.8, then find the one that is closest to PBLLH. Using that level as the approximate level of PBLH. Does this meet your requirement?
For your 2nd question, how to calculate CO2 concentration based on PBLH, I don't have an answer. We are not experts in chemistry. I would suggest you post this question to wrf-chem forum.