springpheno (version 0.5.0)

soldec: Solar Declination Determination

Description

Retains the legacy calculation for the solar declination from the Ault et al. (2015) Matlab code. This returns the day of year based on the start of climatological spring, meant for use with the function daylength. That is, a DOY=1 is March 1. The function itself uses the calendar day of the year (from 1-366).

Usage

soldec(DOY)

Arguments

DOY

Scalar - day of year from 1 to 366.

Value

Scalar - Spring climatological calendar day of year for the location and calendar day of year matching the appropriate solar declination angle.

References

Ault, T.R., R. Zurita-Miller and M. Schwarz, 2015: A Matlab<U+00A9> toolbox for calculating spring indices from daily meteorological data. Computers and Geosciences, 83, DOI: 10.1016/j.cageo.2015.06.015

Examples

# NOT RUN {
doy <- 45
result <- soldec(doy)
# }