Calculate the Top and Bottom Depths of the Metalimnion
Calculates the top and bottom depths of the metalimnion in a stratified lake. The metalimnion is defined as the water stratum in a stratified lake with the steepest thermal gradient and is demarcated by the bottom of the epilimnion and top of the hypolimnion.
meta.depths(wtr, depths, slope = 0.1, seasonal = TRUE, mixed.cutoff = 1)
wtr |
a numeric vector of water temperature in degrees C |
depths |
a numeric vector corresponding to the depths (in m) of the wtr measurements |
slope |
a numeric vector corresponding to the minimum slope |
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 |
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. |
A numeric vector of the top and bottom metalimnion depths in meters. Returns the bottom depth if no distinct metalimion top and bottom found.
Wetzel, R. G. 2001. Limnology: Lake and River Ecosystems, 3rd ed. Academic Press.
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)
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)
m.d = meta.depths(wtr, depths, slope=0.1, seasonal=FALSE)
cat('The top depth of the metalimnion is:', m.d[1])
cat('The bottom depth of the metalimnion is:', m.d[2])Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.