| pvulg_budburst_parameters {phenModel} | R Documentation |
Estimated Parameters for the Exponential Decay Model for Budburst
Description
Vector of estimated parameters.
Usage
data("pvulg_budburst_parameters")Format
The format is: Named num [1:2] 540.196 -0.016 - attr(*, "names")= chr [1:2] "b" "m"
Details
The method implied is based on the Alternating Model, which is a degree-day model that accumulates thermal/chilling units above/below a base threshold from a specified date (Cannell and Smith, 1983). The b and m values correspond to the estimates for budburst for Salix viminalis (Pollard et al., submitted).
Source
Chmielewski, F.M., Heider, S., Moryson, S. and Bruns, E. (2013) International phenological observation networks: concept of IPG and GPM. In M. D. Schwartz, ed. Phenology: An integrative environmental science. New York London: Springer, p. 610.
References
Cannell, M.G.R. and Smith, R.I. (1983) Thermal time, chill days and prediction of budburst in Picea sitchensis. Journal of Applied Ecology, 20(3), 951–963.
Pollard C.P., Griffin C.T., Moral R.A., Duffy C., Chuche J., Gaffney M.T., Fealy R. (submitted) phenModel: a temperature-dependent phenology model for the blue willow beetle, Phratora vulgatissima.
Examples
data(pvulg_budburst_parameters)