# Is the bottom layer boundary layer (hbbl) a depth of thickens?

**URL:** <https://forum.croco-ocean.org/t/is-the-bottom-layer-boundary-layer-hbbl-a-depth-of-thickens/306>\
**Category:** run / config issues\
**Tags:** job-positions, Miscellaneous\
**Created:** [August 18, 2021, 10:42pm UTC](https://forum.croco-ocean.org/t/is-the-bottom-layer-boundary-layer-hbbl-a-depth-of-thickens/306 "2021-08-18T22:42:04Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![lfloperag](https://forum.croco-ocean.org/letter_avatar_proxy/v4/letter/l/3bc359/32.png) [@lfloperag](https://forum.croco-ocean.org/u/lfloperag)\
**Post date:** [August 18, 2021, 10:42pm UTC](https://forum.croco-ocean.org/t/is-the-bottom-layer-boundary-layer-hbbl-a-depth-of-thickens/306/1 "2021-08-18T22:42:04Z")

</div>

Hello all,

I am wondering if the auxiliar variable “hbbl” is the depth or the thickness of the bottom boundary layer?? If it is the thickness I need to compute the difference with the depth to know the real depth.

Thanks in advance.

Cheers.  
-Luisa