NCL Graphics: NCOM Ocean Model

ocean_1.ncl: Takes advantage of land being set the missing to plot the land as the mask used by the ocean model. If you were to plot T(0,20,:,:), you would see significantly more land.

cnFillOn = True, Turns on the color fill.

mpFillOn = False, Turns off the gray continents.

mpOutlineOn = False, Turns off the continental outline.

ocean_2.ncl: Plots contour lines and uses a polymarker to fill in the continental land mask based upon the rmask=0 value. Using rmask for the land mask works only for the surface.

indexes=(/0/)
rmask=in->rmask(:,{0:360})
Chooses which rmask value to draw, reads in the rmask array. If the cyclic point is removed from the lon_t array, it must also be removed here.


ndtooned converts a multi-dimensional array to a single dimension.

ind returns the indexes of the input where it is True.

inds = ind(ndtooned(rmask).eq.indexes) Uses the above two functions to pull out the indexes in a one-dimensional sense, where rmask equals land.

Some of the marker resources used in this example:
gsMarkerIndex =16, filled circle
gsMarkerSizeF = 7.0, marker size
gsMarkerColor= "gray"

gsn_polymarker plots the polymarkers

ocean_3.ncl: Uses rmask and polymarkers to draw the masks for the different ocean areas.

indexes = (/0,1,2,3,6,8,9,10/)
colors =
(/"gray","blue","green","red","hotpink","coral","magenta","aquamarine"/)

Chooses which basins to plot and in which color. Other named colors are available.

ocean_4.ncl: Plots an oceanic slice across the Atlantic at 25N with a default label bar.

cnLineLabelsOn = False, Turns off contour line labels.

cnInfoLabelOn = False, Turns off the contour information label.

gsnYAxisIrregular2Linear = True, Converts the irregular z-axis to linear.

trYReverse = True, Reverses the y-axis.

pmLabelBarDisplayMode = "Always", Turns on the label bar when using gsn_contour. When using gsn_csm_contour, the label bar is the default.

sfXArray = lon_t
sfYArray = z_t/100, Uses the lon/depth arrays for the plot axis.