Re: Plots

From: Adam Phillips (asphilli AT cgd.ucar.edu)
Date: Tue Jan 18 2005 - 14:31:57 MST

  • Next message: Benjamin Lamptey: "Re: Plots"

    Hi Ben,

    It looks like your regional model has 2D latitudes and longitudes, and thus is
    on a curvilinear grid. NCL can handle this, but you have to assign some
    attributes to your data array "x", using the 2 arrays you sent us printVarInfo
    info about:

           x@lon2d = lon2d
           x@lat2d = lat2d
           
    When you plot x, NCL will then recognize that you have 2D lats/lons.

    >4) Is the correct data for the GCM extracted? Since the lon is
    >from 0 to 360 for the data, is NCL able to identify the lon value
    >corresponding to -90.0246 (minlon) and -57.9754 (maxlon)?

    Yes, NCL is able to recognize the negative longitudes when plotting, even though
    your GCM longitudes go from 1->360...

    Adam
        
    >Delivered-To: asphilli@ucar.edu
    >Delivered-To: ncl-talk@ucar.edu
    >Date: Tue, 18 Jan 2005 15:54:31 -0500
    >From: Benjamin Lamptey <lamptey@essc.psu.edu>
    >To: ncl-talk@ucar.edu
    >Mime-Version: 1.0
    >Content-Disposition: inline
    >User-Agent: Mutt/1.4.2.1i
    >Subject: Plots
    >X-BeenThere: ncl-talk@ucar.edu
    >X-Mailman-Version: 2.1.1
    >List-Id: NCAR Command Language User Group <ncl-talk.ucar.edu>
    >List-Unsubscribe: <http://mailman.ucar.edu/mailman/listinfo/ncl-talk>,
    <mailto:ncl-talk-request@ucar.edu?subject=unsubscribe>
    >List-Post: <mailto:ncl-talk@ucar.edu>
    >List-Help: <mailto:ncl-talk-request@ucar.edu?subject=help>
    >List-Subscribe: <http://mailman.ucar.edu/mailman/listinfo/ncl-talk>,
    <mailto:ncl-talk-request@ucar.edu?subject=subscribe>
    >
    >Hello,
    >I am comparing a GCM and a regional model. The longitudes in the
    >go from 1 to 360.
    >
    >2) I have the following from the regional model
    >
    >==========> printVarInfo: lat2d
    >
    >Variable: x (parameter)
    >Type: float
    >Total Size: 11776 bytes
    > 2944 values
    > Number of Dimensions: 2
    > Dimensions and sizes: [64] x [46]
    > Coordinates:
    > (0) Minimum: 34.8703 Maximum: 50.3709
    >
    >
    >(0) ==========> printVarInfo: lon2d
    >
    >
    >Variable: x (parameter)
    >Type: float
    >Total Size: 11776 bytes
    > 2944 values
    > Number of Dimensions: 2
    > Dimensions and sizes: [64] x [46]
    > Coordinates:
    > (0) Minimum: -90.0246 Maximum: -57.9754
    >
    >3) So for the GCM resources, I do the following
    >
    > gres@mpMinLatF = minlat
    > gres@mpMaxLatF = maxlat
    > gres@mpMinLonF = minlon
    > gres@mpMaxLonF = maxlon
    >
    >The tickmarks for both the GCM and the regional model indicate that
    >the same geographical region is being plotted.
    >
    >4) Is the correct data for the GCM extracted? Since the lon is
    >from 0 to 360 for the data, is NCL able to identify the lon value
    >corresponding to -90.0246 (minlon) and -57.9754 (maxlon)?
    >
    >The plots look too different. I want to be sure I am not making a
    >mistake in plotting.
    >
    >Thanks
    >Ben
    >--
    >
    >
    >Benjamin L. Lamptey Phone: (814) 865-9911 (office)
    >Pennstate (EMS Environment Institute) (814) 237-8193 (home)
    >2217 Earth-Engineering Sciences Bldg Fax : (814) 865-3191
    >University Park, PA 16802 WWW:http://www.essc.psu.edu/~lamptey
    >
    >
    >
    >
    >----- End forwarded message -----
    >
    >--
    >
    >
    >Benjamin L. Lamptey Phone: (814) 865-9911 (office)
    >Pennstate (EMS Environment Institute) (814) 237-8193 (home)
    >2217 Earth-Engineering Sciences Bldg Fax : (814) 865-3191
    >University Park, PA 16802 WWW:http://www.essc.psu.edu/~lamptey
    >
    >
    >
    >_______________________________________________
    >ncl-talk mailing list
    >ncl-talk@ucar.edu
    >http://mailman.ucar.edu/mailman/listinfo/ncl-talk

    -------------------------------------------------------------
    Adam Phillips email: asphilli@ucar.edu
    Climate and Global Dynamics Division tel: (303) 497-1726
    National Center for Atmospheric Research fax: (303) 497-1333
    P.O. Box 3000
    Boulder, CO 80307-3000 http://www.cgd.ucar.edu/~asphilli

    _______________________________________________
    ncl-talk mailing list
    ncl-talk@ucar.edu
    http://mailman.ucar.edu/mailman/listinfo/ncl-talk



    This archive was generated by hypermail 2b29 : Tue Jan 18 2005 - 15:00:44 MST