WindowGPPFourier: Calculate GPP from O2 time series in consecutive time-windows...
In GPPFourier: Calculate Gross Primary Production (GPP) from O2 Time Series

Description Usage Arguments Details Value Author(s) References See Also

Calculate GPP from O2 time series in consecutive time-windows of prescribed length.

WindowGPPFourier(x, dt = NULL, units = c("days", "hours", "mins"),
  Width = 14, Nblocks = floor(unclass(difftime(range(ts[, 1])[2], range(ts[,
  1])[1], units = "days"))[1]/Width), fDL = NULL, phi, lambda,
  filtWidth = 16, ...)

`x`	Vector or dataframe containing consecutive O2 concentrations, sampled at regular intervals (time step = dt). In case of irregular time intervals, consider `resample`. When x is a data frame, time (POSIXt) must be in first column and O2 in second column; when x is a vector, dt must be provided.
`dt`	Sampling time step. Either a difftime object or a numerical value. When `dt` is given as a numerical value, `units` have to be provided. Can be omitted when `x` is a data frame, then `dt` is calculated from the time spacing between the first two samples.
`units`	Unit of sampling time step
`Width`	Width [days] of the time-windows for which GPP is calculated
`Nblocks`	Number of consecutive subsections on which to calculate GPP. By default the number of windows of Width fitting into the range of x[,1] Default the largest number of blocks ow width=Width that
`fDL`	Optional. Relative fraction of daylight. When `x` is a data frame, fDL is calculated with `fDLfun`
`phi`	Latitude of location where O2 series was recorded. Used to calculate relative fraction of light hours during the day, during which production takes place
`lambda`	Longitude of location where O2 series was recorded
`filtWidth`	[hours] Lenght of moving average filter to filter O2 series. See GPPFourierPreprocess()
`...`	Other parameters to be passed to `GPPFourier()`

no details

Average gross primary production in units of oxgen as in x per day.

Tom Cox <tom.cox@uantwerp.be>

Cox T.J.S. et al. (2015) 'Estimating primary production from oxygen time series: a novel approach in the frequency domain', Limnology And Oceanography:Methods 13, 529-552. DOI: 10.1002/lom3.10046

GPPFourierPreprocess, GPPFourier, GPPFourier_t, WindowGPPFourier.gts, SunRiseSet