[gradsusr] display variable at depth between two layers

[Eric Altshuler]

Hello Edward,

If you want to do a simple linear interpolation, compute a weighted average of the values at the two levels that bracket the level you want to interpolate to. Since in your case the two levels would be 100m and 200m, the linear interpolation to 185m would be given by:

temp(z=185m) = 0.15*temp(z=100m) + 0.85*temp(z=200m)

Best regards,

Eric L. Altshuler
Assistant Research Scientist
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
USA

E-mail: ela at cola.iges.org
Phone: (301) 902-1257
Fax: (301) 595-9793

----- Original Message -----
From: "weiqwang" <xhweiq at gmail.com>
To: gradsusr at gradsusr.org
Sent: Monday, April 26, 2010 12:36:34 PM
Subject: [gradsusr] display variable at depth between two layers

hi, gradsusers,


I have one simple question which might involves the interpolation. My
data is defined at depth for example from 0m to 1000m, with regular
interval 100m ( 11 layers in total). When I want to display variable
(such as temp) at depth 185m, I found temperature at 200m was shown. How
can I get the temperature at 185m ( expect a linear interpolation
results)?

Any suggestions are appreciated.

Edward



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