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Script: theta.gs; Defines potential and equlivalent potential temperature given temperature and moisture inputs

admin بازدید : 91 شنبه 05 شهريور 1401 نظرات (0)

This script, is really more of a function, the best way to use this would be to copy the contents of this script into the bottom of the script you wish to use it in.  This function reads in temperature and moisture information and returns a good approximation of both potential and equivalent potential temperature.

This function asks for up to four inputs, though only temperature and moisture inputs are required.
It is capable of calculating  equivalent potential temperature given four different moisture input variables:

  1. Relative Humidity (-rh)
  2. Mixing Ratio (-r)
  3. Vapor Pressure (-e)
  4. Specific Humidity (-q)

The default is relative humidity.

درباره Index , I , T , script ,

About basmap and Download for grads

admin بازدید : 1723 پنجشنبه 11 دي 1393 نظرات (0)

basemap.gs

This is documentation for basemap.gs, a Grads script that overlays a land or ocean mask that exactly matches the coastal outlines of the three Grads map files: lowres, mres, and hires. Basemap works by overlaying polygons on top of an existing display; once they are all drawn, the polygons appear as a solid region that covers the land or ocean areas. Basemap does not actually mask the data, it only masks the display of the data.

Syntax

basemap.gs L(and)/O(cean) <fill_color> <outline_color> <L(owres)/M(res)/H(ires)>

The land and ocean masks are composed of hundreds of polygons that are specified in accompanying ASCII files. The ASCII files must be downloaded from the Grads script library. Once you have downloaded these files and stored them in a convenient location, you must update your copy of basemap.gs to include the path of the location of these files. The script will not work without these files.

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