LightBornholm: Light regime generator

In herrmannrobert/VerDi: Modelling the vertical distribution of aquatic organisms

Description

Function generates semi-customized light profile typically found in the Bornholm Basin (Central Baltic Sea) in early May.

Usage

LightBornholm(depth, daytime = seq(0, 24, 0.01666667), ATTk, min, lx)

Arguments

depth	numeric vector, depth profile which is used by light model, Default: c(1:100).
daytime	numeric vector, time sequence in decimals, e.g. every single minute over 24 hours (default).
ATTk	numeric, attenuation coefficient.
min	numeric, minimum illumination at shallowest depth.
lx	logical, if TRUE, output is in lux [lx], if FALSE, computations are in W/m2 (default).

Details

Function makes use of light model developed by (...). Further details in 'Examples'.

Examples

## Not run: 

#The minimum illumination at >0m of depth is assumed to be 2 lx
minVal <- 2

#Attenuation coefficiant is set to -0.16, which can be considered as relatively 'clear'
atteCo <- -0.16

#Computing intra daily under water light regime [lx] down to 100m of depth in Bornholm Basin
testmatrix <- LightBornholm(depth = c(1:100), ATTk = atteCo, lx = TRUE, min = minVal)

#Assigning time of day to each column
ts <- format(seq(from = as.POSIXct("2017-08-19 0:00"), length.out = 1440, by = "min"), "%H:%M")
colnames(testmatrix) <- ts

#Printing underwater light regime between 20 and 40 meters of depth at 00:00, 06:00, 12:00 and 18:00
testmatrix[20:40, c("00:00", "06:00", "12:00", "18:00")]

## End(Not run)

herrmannrobert/VerDi documentation built on June 10, 2019, 7:32 a.m.