skewtPlot {RadioSonde}

A skewt plot wind wind barbs.

Description

Creates a SKEW-T, log p diagram with dry-bulb temperature and dewpoint temperature traces versus (log) pressure. Optionally plots the vertical wind profile using wind barbs.

Usage

skewtPlot(
..., winds = FALSE, colTemp = c("grey40", "blue2"),
                 colDew = colTemp, lty = c(1, 1), lwd = 1.5, windplot =
                 NULL, windAxis = FALSE, sizeBarb = NULL, thin = NULL,
                 magicRatio = 13, skewplot = NULL, mar.skewt = c(3.1,
                 5.1, 4.1, 2.1)
)

Arguments

...

One or more data frames where rows indexes the time ( or height) and the columns are the variables measured. The variables must be names as: c( "press", "temp", "dewpt") corresponding to pressure (hPa), temperature (C) and dew point temperature (C).

winds

If TRUE will add wind barbs to the side of the skewt plot.

colTemp

Colors(s) to plot temperature.

colDew

Colors(s) to plot dew point temperature.

lty

Line type for the plotted curves.

lwd

Line width for the curves.

skewplot

Vector of 4 figure coordinates that define the skewt plot portion of figure. By default c( 0, magicRatio/(magicRatio + L), 0,1).

windplot

A matrix of the 4 figure coodinates where each row defines the figure region for the wind barbs.

windAxis

If TRUE include a height axis alongside the wind barbs.

sizeBarb

Controls relative size of the wind barbs.

thin

Total number of equally select3ed wind barbs to plots. This avoids too much overplotting.

mar.skewt

Margins for the labels of the skewt plot.

magicRatio

Relative space in horizontal for the skewt plot and the panel with vertical wind barbs.

Details

We recommend that the plots be drawn using the the pdf output devide with a 8 by 6 inch size.

Author(s)

Doug Nychka, Eric Gilleland, Tim Hoar, Kate Young

References

1. Department of Defense, 1969, "USAF SKEW-T, log p DIAGRAM," DOD-WPC-9-16-1, Aeronautical Chart and Information Center, United States Air Force, St. Louis, Missouri 63118.

2. List, R.J. (editor), 1958, Smithsonian Meteorological Tables, Smithsonian Institute, Washington, D.C.

3. Nordquist, W.S., 1973, "Numerical Approximations of Selected Meteorological Parameters for Cloud Physics Problems," ECOM-5475, Atmospheric Sciences Laboratory, US Army Electronics Command, White Sands Missile Range, New Mexico 88002.

4. Stipanuk, G.S., 1973, "Algorithms for Generating a SKEW-T, log p Diagram and Computing Selected Meteorological Quantities," American Sciences Laboratory, US Army Electronics Command, White Sands Missile Range, New Mexico 88002.

See Also

skewt.lines

Examples

data(sonde1)
# skewt with wind barbs. 

skewtPlot( sonde1, winds=TRUE)

# mulitple profiles

data(sonde2)
skewtPlot( sonde1, sonde2)