Mapas terrestres con topologias simplificadas. Estos mapas no
tienen precision geodesica, por lo que aplica el DFL-83 de 1979 de la Republica
de Chile y se consideran referenciales sin validez legal.
No se incluyen los territorios antarticos y bajo ningun evento estos mapas
significan que exista una cesion u ocupacion de territorios soberanos en
contra del Derecho Internacional por parte de Chile. Esta paquete esta
documentado intencionalmente en castellano asciificado para que funcione sin
problema en diferentes plataformas.
(Terrestrial maps with simplified toplogies. These maps lack geodesic
precision, therefore DFL-83 1979 of the Republic of Chile applies and are
considered to have no legal validity.
Antartic territories are excluded and under no event these maps mean
there is a cession or occupation of sovereign territories against International
Laws from Chile. This package was intentionally documented in asciified
spanish to make it work without problem on different platforms.)

c(
person("Mauricio", "Vargas", role = c("aut", "cre"),
email = "mavargas11@uc.cl"),
person("Roberto", "Salas", role = "ctb"),
person("Joshua", "Kunst", role = "ctb"),
person("Juan", "Correa", role = "dtc"),
person(given = "Ricardo",
family = "Aravena",
role = c("ths")),
person(family = "Pontificia Universidad Catolica de Chile",
role = "cph"),
person(family = "Instituto Nacional de Estadisticas (INE)",
role = "dtc"),
person(family = "Subsecretaria de Desarrollo Regional (SUBDERE)",
role = "dtc"),
person(family = "Biblioteca del Congreso Nacional de Chile (BCN)",
role = "dtc")
)

Statistical methods for phenology analysis in temperate fruit
trees
This package can be used to do a range of analyses on
long-term weather records and - more importantly - on long-term
observational records of the phenology of temperate vegetation,
i.e. vegetation with a chilling and a heat requirement that
must be fulfilled in order to initiate spring phenology.

Statistical Methods for Phenology Analysis in Temperate Fruit
Trees
The phenology of plants (i.e. the timing of their annual life phases) depends on climatic cues. For temperate trees and many other plants, spring phases, such as leaf emergence and flowering, have been found to result from the effects of both cool (chilling) conditions and heat. Fruit tree scientists (pomologists) have developed some metrics to quantify chilling and heat. 'chillR' contains functions for processing temperature records into chilling (Chilling Hours, Utah Chill Units and Chill Portions) and heat units (Growing Degree Hours). Regarding chilling metrics, Chill Portions are often considered the most promising, but they are difficult to calculate. This package makes it easy. 'chillR' also contains procedures for conducting a PLS analysis relating phenological dates (e.g. bloom dates) to either mean temperatures or mean chill and heat accumulation rates, based on long-term weather and phenology records.