rLakeAnalyzer (version 1.11.4.1)

thermo.depth: Calculate depth of the thermocline from a temperature profile.

Description

This function calculates the location of the thermocline from a temperature profile. It uses a special technique to estimate where the thermocline lies even between two temperature measurement depths, giving a potentially finer-scale estimate than usual techniques.

Usage

thermo.depth(wtr, depths, Smin = 0.1, seasonal = TRUE, index = FALSE,
  mixed.cutoff = 1)

Arguments

wtr

a numeric vector of water temperature in degrees C

depths

a numeric vector corresponding to the depths (in m) of the wtr measurements

Smin

Optional paramter defining minimum density gradient for thermocline

seasonal

a logical value indicating whether the seasonal thermocline should be returned. This is fed to thermo.depth, which is used as the starting point. The seasonal thermocline is defined as the deepest density gradient found in the profile. If FALSE, the depth of the maximum density gradient is used as the starting point.

index

Boolean value indicated if index of the thermocline depth, instead of the depth value, should be returned.

mixed.cutoff

A cutoff (deg C) where below this threshold, thermo.depth and meta.depths are not calculated (NaN is returned). Defaults to 1 deg C.

Value

Depth of thermocline. If no thermocline found, value is NaN.

See Also

ts.thermo.depth, water.density

Examples

# NOT RUN {
# A vector of water temperatures
wtr = c(22.51, 22.42, 22.4, 22.4, 22.4, 22.36, 22.3, 22.21, 22.11, 21.23, 16.42, 
		15.15, 14.24, 13.35, 10.94, 10.43, 10.36, 9.94, 9.45, 9.1, 8.91, 8.58, 8.43)

 #A vector defining the depths
 depths = c(0, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 
     17, 18, 19, 20)

 t.d = thermo.depth(wtr, depths, seasonal=FALSE)

 cat('The thermocline depth is:', t.d)

# }