HMXL mixed layer depth

[a_sengupta@unsw_edu_au]

Hi all,
Could anyone give me a quick idea of how the HMXL variable is calculated in the CCSM3. Is it just based on a Richardson number criteria or is it more complicated?
Many thanks
Alex

 

[njn01]

It's more complicated...

See Large et al, JPO, Vol 27 (1997):2418-? The explanation of HMXL starts on page 2418.

 

[a_sengupta@unsw_edu_au]

Thanks Ill take a look
Alex

 

[yaozhixiong@foxmail_com]

Hi, njn01 I have read Large's paper. He defined the mixed layer as :The discrete model profile of buoyancy b(k) at depth -z(k) is scanned for the maximum of (b(k)-b(1))*z(k)^(-1), where the first level buoyancy b(1) is equated to the surface buoyance. The mixed layer depth h(m1) is then shallowest depth where the local , interpolated buoyancy gradient equals this maximum. My question is,there are three different mixed-layer depth:HMXL ---- Mixed-Layer DepthXMXL ---- Maximum Mixed-Layer DepthTMXL ---- Minimum Miexed-Layer DepthWhat does the XMXL and TMXL mean? Why does the model generate these two variables? Thanks.Best regards,Yao