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mjo_cross_coh2pha

Calculate space-time coherence-squared and phase using the array returned by mjo_cross_segment .

Prototype

	procedure mjo_cross_coh2pha (
		STC [16][*][*] : numeric,  
		opt        [1] : integer   
	)

Arguments

STC

A three dimensional variable array as returned by mjo_cross_segment.

opt

Currently, not used. Set to 0.

Description

The only time this is used is when elements (0:7,:,:) have been averaged over multiple segments. This will compute the coherence-squared and phase using averaged power and cross-power quantities. The input array, STC, will be updated appropriately. The following will not be changed:

         ( 0,:,:)  -  symmetric power spectrum of x
         ( 1,:,:)  -  asymmetric power spectrum of x
         ( 2,:,:)  -  symmetric power spectrum of y
         ( 3,:,:)  -  asymmetric power spectrum of y
         ( 4,:,:)  -  symmetric cospectrum 
         ( 5,:,:)  -  asymmetric cospectrum 
         ( 6,:,:)  -  symmetric quadrature spectrum 
         ( 7,:,:)  -  asymmetric quadrature spectrum 
The following will be computed using the input power and cross power quantities:
         ( 8,:,:)  -  symmetric coherence-squared spectrum 
         ( 9,:,:)  -  asymmetric coherence-squared spectrum 
         (10,:,:)  -  symmetric phase spectrum 
         (11,:,:)  -  asymmetric phase spectrum 
         (12,:,:)  -  symmetric component-1 phase spectrum 
         (13,:,:)  -  asymmetric component-1 phase spectrum 
         (14,:,:)  -  symmetric component-2 phase spectrum 
         (15,:,:)  -  asymmetric component-2 phase spectrum 
The coordinate frequencies span 0.0 to 0.5. The coordinate wavenumbers span -M/2 to M/2 where M is the number of longitudes.

See the Level 2 diagnostics description titled MULTI-SCALE INTERACTIONS at the US-CLIVAR MJO diagnostics website.

See Also

mjo_cross_segment, mjo_cross, mjo_spectra, wkSpaceTime, wkSpaceTime_cam

Examples

See Example 11 of the Madden-Julian Oscillation web page.