[MITgcm-support] calc_boxmean_T() function

[gael forget]

Hi Weston,

I think that a correct call would have been
	test = calc_boxmean_T(theta(:,:,1,1),'LATS',[-5 5],'LONS', [-180:1:180],'level',1);
based upon the help section (type 'help calc_boxmean_T’ in matlab).

This is a function I had not used much recently. When I retested 
it on tuesday, I found that a couple things were not particularly 
practical, and revise it accordingly @
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/matlab_class/gcmfaces_calc/calc_boxmean_T.m

The revision should not change anything for what you were trying to do, 
but I would suggest that you update your copy of calc_boxmean_T.m

Cheers,
Gael


On Nov 24, 2014, at 3:53 PM, Weston Anderson <weston.b.anderson at gmail.com> wrote:

> Hi All,
> 
> I'm new to gcmfaces and am trying to use ECCO v4 to calculate the average potential temperature (averaged between 5S and 5N) at 1 degree longitude intervals around the globe for a specific time step at all depths using  calc_boxmean_T(). (i.e. expecting a vertical slice along the equator [a value for each depth/degree interval])
> 
> I am initially just trying to get the function to work for a single time and single depth (surface) but have been unable to do so. I've run out of documentation to consult and unfortunately I can't follow the source code of the function well enough to see what I'm doing wrong.
> 
> I suspect that I'm misinterpreting input specification of 'line vector of latitutde interval edges' for the LAT, LON inputs to calc_boxmean_T(), but have tried a number of things unsuccessfully.
> 
> below is the basic code I'm trying (after initializing the gcmfaces package):
> %----------%--------%--------%--------%--------%--------%--------%
> 
> %define the time steps of interest:
> climSt = 1998; %for now use full years for the climatology
> climEn = 2012;
> climSteps = [((climSt-1992)*12)+1,((climEn-1992)*12)];
> 
> %       read_nctiles(file, var, time, depth)
> tName = 'http://mit.ecco-group.org/opendap/ecco_for_las/version_4/release1/nctiles/THETA/THETA';
> theta = read_nctiles(tName,'THETA',climSteps(1):climSteps(2),1);
> 
> % calculate the mean potential temp between [-5 and 5] at the surface at 1 deg intervals for time step 1
> test = calc_boxmean_T(theta(:,:,1,1), [-5 5], [-180:1:180], 1)
> 
> %----------%--------%--------%--------%--------%--------%--------%
> 
> Could someone point me towards how to use this function correctly?
> 
> Thanks in advance,
> Weston
> 
> -- 
> PhD Candidate
> Columbia University
> Dept. of Earth & Environmental Science
> Lamont-Doherty Earth Observatory 
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