**To**:**FERRET Users group <ferret_users@xxxxxxxxxxxxxxxxxxx>****Subject**:**Heat content in the mixed layer****From**:**"Satheesh C. Shenoi" <shenoi@xxxxxxxxxxxxx>**- Date: Tue, 06 May 2003 17:23:20 -0700 (PDT)
- Sender: owner-ferret_users@xxxxxxxxxxxxxxxxxxxx

Dear Ferret Guru, Perhaps this is a trivial question, but I would like to get some help on this. I want to compute the heat content in the mixed layer. The mixed layer height is computed as follows: let mix_layer_dens = dens[k=1]+0.2 let zero_at_mix_layer_dens = dens - mix_layer_dens let mix_layer_h = zero_at_mix_layer_dens[z=@loc:0] mix_layer_h has X,Y and T (time) dimensions. Now to compute the heat content in the water column above the mixed layer. I tried the following let temp_vertint = rhow*Cp*temp[z=0:`mix_layer_h`@din] it looks, Ferret is unable to substitute for `mix_layer_h`. I am using Ferret version 5.40. I am getting following error: let temp_vertint = rhow*Cp*temp[z=0:`mix_layer_h`@din] **ERROR: invalid command: grave accent doesnt evaluate to scalar mix_layer_h DEFINE VARIABLE temp_vertint = rhow*Cp*temp[z=0:`mix_layer_h`@din] Command file, command group, or REPEAT execution aborted. Please let me know how to compute the heat content in the mixed layer. Thanks in advance. -satheesh Satheesh C. Shenoi Ph.: (91)(832) 226253-56 ext4224/4400 Physical Oceanography Division, Fax: (91)(832) 223340/221360 National Institute of Oceanography, email: shenoi@darya.nio.org shenoi@csnio.ren.nic.in Dona Paula, Goa 403 004, India. Ph.: (91)(832) 233453 (home)

**Follow-Ups**:**Re: Heat content in the mixed layer***From:*Ansley Manke

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