Re: ESMF_regrid

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Tue Sep 11 2012 - 08:42:21 MDT

Yes. Interpolate the high resolution (PRISM & WRF) to the low
resolution NARR grid. Since precipitation does not have
a high degree of spatial correllation you should use
the ESMF's conservative regridding method.

On 9/11/12 2:04 AM, jokalebo@huskers.unl.edu wrote:
> *I need some advise please with regard to regridding.*
>
> *I have 3 different data files (rectilinear and curvilinear) with
> different resolutions: *
>
> *
> *PRISM is gridded data (cellsize is 0.041667 decimal degrees), *
> *
> *WRF (curvilinear dx= 12 km by dy = 12 km), and *
> *
> *NARR 0.3 degrees (32km) resolution***
>
> *I want to compare a variable (precipitation) over a specific region
> (namely Nebraska).*
>
> *Should I regrid from high to low resolution (WRF and PRISM - source
> files) and NARR (destination)???*
>
> *Kindly give me some tips.*
>
> *Thanks.*
>
> **
>
> *Jane*
>
> **
>
> **
>
> **
>
> **
>
> *PRISM (rectilinear) *
>
> **
>
> *ncols 1405*
>
> *nrows 621*
>
> *xllcorner -125.020833*
>
> *yllcorner 24.062500*
>
> *cellsize 0.041667*
>
> *NODATA_value -9999*
>
> **
>
> *0.041667 decimal degrees = 4.625037 km*
>
> **
>
> **
>
> *Wrf (curvilinear)*
>
> **
>
> *DY : 12000*
>
> *DX : 12000*
>
> BOTTOM-TOP_GRID_DIMENSION : 28
>
> SOUTH-NORTH_GRID_DIMENSION : 61
>
> WEST-EAST_GRID_DIMENSION : 74
>
> SIMULATION_START_DATE : 2008-01-01_00:00:00
>
> START_DATE : 2008-03-31_21:00:00
>
> TITLE : UNL RCMF WRF daily archive
>
> dimensions:
>
> time = 30// unlimited
>
> pres_lev = 11
>
> south_north = 60
>
> west_east = 73
>
> soil_layers = 4
>
> **
>
> *narr (curvilinear)*
>
> **
>
> The grid resolution is 349x277 which is approximately *0.3 degrees
> (32km) resolution* at the lowest latitude.
>
> Jane Okalebo
> PhD student
> HPRCC, School of Natural Resources
> University of Nebraska-Lincoln
> 249 Hardin Hall
> 3310 Holdrege,
> Lincoln, Nebraska 68583-0749 U.S.A.
>
>
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Received on Tue Sep 11 08:42:30 2012

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