triangular_chill_1: Triangular chill function (daily extreme temps as input)

In EduardoFernandezC/dormancyR: Functions to Compute Chill Metrics

Triangular chill function (daily extreme temps as input)

Description

Function to calculate winter chill for deciduous trees according to the Triangular chill function proposed by Hanninen (1990) and Krammer (1994).

Usage

triangular_chill_1(ExtrDailyTemp, summ = TRUE)

Arguments

ExtrDailyTemp	Dataframe containing columns "Tmax" and "Tmin". These values must correspond to daily records
summ	Boolean parameter indicating whether the computed metric should be provided as cumulative values over the period or as the actual accumulation for each hour

References

Hanninen H. 1990. Modelling bud dormancy release in trees from cool and temperate regions. Acta For. Fenn. 213: 1-47. doi:10.14214/aff.7660

Kramer K. 1994. Selecting a model to predict the onset of growth of Fagus sylvatica. J. Appl. Ecol. 31(1): 172-181. doi:10.2307/2404609

Examples

library(chillR)

tempResponse_daily(KA_weather, Start_JDay = 345, End_JDay = 58,
 models = list(Triangular_Chill = triangular_chill_1))
 

EduardoFernandezC/dormancyR documentation built on Aug. 24, 2022, 7:21 a.m.