• then, specifying the title to
    mytitle= "Nitrate concentration"
    
  • and modifying the contents of three lines to
    v1=    50. ; Low  value for isopleths, disregarded when  nv  is 0 or 1
    v2=   220. ; High value for isopleths, disregarded when  nv  is 0 or 1
    nv=    17  ; No. of isopleths, there will be  nv+1  colors
    
    in order to lock the use of contours and color map (such a specification is essential to invoke when executing the multi-figure scripts mcontour.sh), mc-mask.sh and mlayersection.sh)
  • Finally, the following command was issued:

    mc-mask.sh 4dMapr bio4km_nitrate.nc bio4km_oxygen.nc nitrt oxygn 0 10000 3 1 43 3

    By executing this command, a set of ppm & gif images for the nitrate concentrations at level no. 3 for time steps 1, 4, 7,..., 43, for the part of the domain where the oxygen concentration exceeds 10000 (i.e., the concentration is outside the range [0,10000]). The gif images are assembled in an animation, and the result is:


    mc-mask.sh: syntax

    mc-mask.sh --help
    
               mc-mask.sh  /  ncl-metno 1.2
    
    >>>
    >>>
    >>> NOTE: The user is **STRONGLY** recommended to copy