StepChill_Wrapper function

StepChill_Wrapper

Same as UniChill_Wrapper, but with a step function for chilling

StepChill_Wrapper(x, par)

Arguments

• x: data.frame with at least columns Temp and JDay
• par: numeric vector of length 7 with the parameters of the StepChill model: 1. Tc, 2. bf, 3. cf, 4. Cstar and 5. Fstar.

Returns

A single numeric value with the JDay prediction for the temperaturs in x$Temp and the model parameters in par.

References

Isabelle Chuine, A Unified Model for Budburst of Trees, J. theor. Biol. (2000) 207

Asse et al., Process-based models outcompete correlative models in projecting spring phenology of trees in a future warmer climate,Agricultural and Forest Meteorology (2020) 107913

Author(s)

Carsten Urbach urbach@hiskp.uni-bonn.de