[Met_help] [rt.rap.ucar.edu #96149] History for PB2NC deriving PBL height

[John Halley Gotway via RT]

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  Initial Request
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Good afternoon,
I'm looking for some documentation on how the pb2nc tool derives boundary
layer height from observations. I've run the tool and it works well, but I
would like some background information on what methods it is using to get the
PBL height.
Thank you,
Jeff Zielonka

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  Complete Ticket History
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Subject: PB2NC deriving PBL height
From: John Halley Gotway
Time: Thu Aug 06 14:46:06 2020

Hello Jeff,

I see you have a question about the derivation of PBL height in MET's
pb2nc tool. I believe you sent this email to the NCAR/RAL website
support, but luckily, they figured out how to route it to us. Please
send future questions about the MET software to met_help at ucar.edu.

Regarding the PBL derivation, this was added to meet verification
requirements for NOAA/EMC. To ensure that MET produces the same answer
as EMC's earlier implementation, we literally dropped in their FORTRAN
subroutine. You can see that code here:

https://github.com/NCAR/MET/blob/master_v9.0/met/src/tools/other/pb2nc/calpbl.f

I do realize that there are multiple ways of computing PBL. If you
have questions about the logic or algorithm, I could reassign this
ticket to one of the scientists on the team.

Hope that helps clarify.

Thanks,
John Halley Gotway

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Subject: RE: [Non-DoD Source] [rt.rap.ucar.edu #96149] PB2NC deriving PBL height
From: Zielonka, Jeffrey R CTR DTRA R AND D (US)
Time: Fri Aug 07 06:12:35 2020

John,

Thanks a lot, that's perfect.  I just need to be able to justify and
explain what it's doing if the question ever comes up.

Sorry for submitting my question to the wrong place.  I swear I
clicked the met_help link!

Regards,
Jeff Zielonka

-----Original Message-----
From: John Halley Gotway via RT <met_help at ucar.edu>
Sent: Thursday, August 6, 2020 4:46 PM
To: Zielonka, Jeffrey R CTR DTRA RD (USA)
<jeffrey.r.zielonka.ctr at mail.mil>
Subject: [Non-DoD Source] [rt.rap.ucar.edu #96149] PB2NC deriving PBL
height

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----

Hello Jeff,

I see you have a question about the derivation of PBL height in MET's
pb2nc tool. I believe you sent this email to the NCAR/RAL website
support, but luckily, they figured out how to route it to us. Please
send future questions about the MET software to met_help at ucar.edu.

Regarding the PBL derivation, this was added to meet verification
requirements for NOAA/EMC. To ensure that MET produces the same answer
as EMC's earlier implementation, we literally dropped in their FORTRAN
subroutine. You can see that code here:

Caution-
https://github.com/NCAR/MET/blob/master_v9.0/met/src/tools/other/pb2nc/calpbl.f

I do realize that there are multiple ways of computing PBL. If you
have questions about the logic or algorithm, I could reassign this
ticket to one of the scientists on the team.

Hope that helps clarify.

Thanks,
John Halley Gotway



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