Re: [ferret_users] Calculating relative vorticity

[Paulo Henrique <paulohsm@xxxxxxxxx>]

Ryo,

Thanks for correcting my mistake and for additional the information.

2008/6/25 Savin <schand@xxxxxxxxxxxxxxxxxxxx>:

Thanks Paulo.

 

Your help is indeed very much appreciated.

 

Savin

 

From: Paulo Henrique [mailto:paulohsm@xxxxxxxxx]
Sent: Thursday, 26 June 2008 3:32 AM
To: Savin
Cc: ferret_users@xxxxxxxx
Subject: Re: [ferret_users] Calculating relative vorticity

 

Hi Savin,

I believe you should use @DDC, @DDB or DDF transformations (see description here).

Supposing you are using relative vorticity defined as

zeta = du/dx - dv/dy

in Ferret, you can do something like:

let dudx = u[i=@ddc]
let dvdy = v[j=@ddc]
let zeta = dudx - dvdy

Where zeta is Z-component of relative vorticity, u and v are your wind component variables.

Hope it helps,
Paulo Santiago

2008/6/25 Savin <schand@xxxxxxxxxxxxxxxxxxxx>:

Dear Ferret users,

 

I am a new user of ferret... having some difficulty writing codes.

 

Can anyone please let me know how to calculate relative vorticity given u and v components of wind vector (in matrix form).

 

Thanks.

Savin

--
Ms. Paulo Henrique Santiago de Maria
Grupo de Modelagem Atmosférica
Departamento de Meteorologia e Oceanografia
Fundação Cearense de Meteorologia e Recursos Hídricos
Av. Rui Barbosa 1246 - CEP 60115-221
Fortaleza, Ceará
Fone: (85) 3101-1106 / 3101-1126

-- 
Ms. Paulo Henrique Santiago de Maria
Grupo de Modelagem Atmosférica
Departamento de Meteorologia e Oceanografia
Fundação Cearense de Meteorologia e Recursos Hídricos

Av. Rui Barbosa 1246 - CEP 60115-221
Fortaleza, Ceará
Fone: (85) 3101-1106 / 3101-1126