A sequence of two (pressure, temperature) pairs that specify the bottom left-hand corner and the top right-hand corner of the plot. The pressure data points must be in units of mb or hPa, and the temperature data points must be in units of oC.
- dry adiabat
A line of constant potential temperature, measured in units of oC. The zeroth dry adiabat line is an axis of the tephigram, see Dry adiabats.
- humidity mixing ratio
A line of constant saturation mixing ratio with respect to a plane water surface, measured in g kg-1, see Humidity mixing ratio.
A line of constant pressure, measured in millibars or hectopascals, see Isobars.
A line of constant temperature, measured in oC. The zeroth isotherm line is an axis of the tephigram, see Isotherms.
- line specification
A sequence of one or more tuple pairs containing a line step value and a zoom level value. Used to control the frequency at which the tephigram plots isobar lines, humidity mixing ratio lines, and saturated adiabat lines. Note that, specifying a zoom level of
Noneforces the associated lines always to be visible.
- line step
The first value in the tuple pair of a line specification. An integer that denotes Nth step multiples. i.e. a line step of
25denotes all lines that are a multiple of 25, or every 25th item from an enumerated list of values.
- pseudo saturated wet adiabat
A line of constant equivalent potential temperature for saturated air parcels, measured in units of oC, see Pseudo saturated wet adiabats.
- saturated adiabat
- zoom level
An inverted zoom level fraction that is a ratio of current tephigram plot display width over the original plot display width.