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Model Spatial and Temporal Coverage

 

The standard version of the QTCM1 provides coverage from tex2html_wrap_inline2278 S to tex2html_wrap_inline2278 N in latitude and coverage over all longitudes. The grid has dimensions tex2html_wrap_inline2310 equal to 64 tex2html_wrap_inline2312 42. The east/west boundaries are periodic, and the north/south boundaries are solid walls. Thus, the grid spacing is 5.625 [i.e. tex2html_wrap_inline2314 ] degrees longitude and 3.75 [i.e. tex2html_wrap_inline2316 ] degrees latitude.

The first index increments in the zonal (x) direction with increasing longitude in the eastward direction, beginning at 0 degrees E longitude. The second index increments in the meridional (y) direction with increasing latitude northward, beginning at tex2html_wrap_inline2278 S latitude (i.e. tex2html_wrap_inline2324 latitude). Thus:

grid box (1,1) is centered at tex2html_wrap_inline2326 E longitude, tex2html_wrap_inline2328 latitude
grid box (2,1) is centered at tex2html_wrap_inline2330 E longitude, tex2html_wrap_inline2328 latitude
grid box (2,2) is centered at tex2html_wrap_inline2330 E longitude, tex2html_wrap_inline2336 latitude
grid box ( tex2html_wrap_inline2338 ) is centered at tex2html_wrap_inline2340 E longitude, tex2html_wrap_inline2342 latitude

The spatial array sizes nx and ny are set in the module file qtcmmod.f90 Higher resolution can be easily achieved by modifying hgrid.h and subroutine parinit. Higher resolution boundary data sets can be created using a package released along with this version of model. See Section 2.4.3 for details. Section 3.2.3 has a more complete description of the model grid.



Climate Systems Interaction Group
Sun Aug 25 00:58:46 PDT 2002