temperature: Generate simulated mean temperature
In VFS: Vegetated Filter Strip and Erosion Model

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

Generates simulated daily temperature minimum and maximum based on parameters derived from daily weather data.

1	temperature(ndays, thiswth)

`ndays`	number of days to simulate
`thiswth`	list output of `wth.param`.

This is a very simple temperature simulation, using three parameters derived from daily weather data and the day of year to calculate a smooth annual temperature change derived from the first harmonic of a Fourier function.

Returns a vector of daily mean temperature (X).

Heather Gall and Sarah Goslee

Grimenes, A. and Nissen, O. (2004) Mathematical modeling of the annual temperature wave based on monthly mean temperatures, and comparisons between local climate trends at seven Norwegian stations. Theor Appl Climatol 78, 229–246. doi: 10.1007/s00704-004-0036-9

wth.param, rainfall

# A sample GHCN daily weather file for State College, PA, is included with this package.
# This file contains a subset of data (1980-2009) for station USC00368449
data("weather") 

# calculate parameters for the poisson model, using 0.3 mm as the lower limit for wet days.
weather.param.p <- wth.param(weather, method = "poisson", llim = 0.3)

# simulate 10 years of temperature
temp10 <- temperature(365*10, weather.param.p)