solar_times

This function estimates the sunrise and sunset hour
for a location, characterized by latitude, and the
day of the year (DOY). The function uses the equations by
Spencer (1971) and Almorox et al. (2005).

Climate is a critical component limiting growing range of plant species, which
also determines cultivar adaptation to a region. The evaluation of climate influence on
fruit production is critical for decision-making in the design stage of orchards and
vineyards and in the evaluation of the potential consequences of future climate. Bio-
climatic indices and plant phenology are commonly used to describe the suitability of
climate for growing quality fruit and to provide temporal and spatial information about
regarding ongoing and future changes. 'fruclimadapt' streamlines the assessment of
climate adaptation and the identification of potential risks for grapevines and fruit
trees. Procedures in the package allow to i) downscale daily meteorological variables
to hourly values (Forster et al (2016) <doi:10.5194/gmd-9-2315-2016>),
ii) estimate chilling and forcing heat accumulation (Miranda et al (2019)
<https://ec.europa.eu/eip/agriculture/sites/default/files/fg30_mp5_phenology_critical_temperatures.pdf>),
iii) estimate plant phenology (Schwartz (2012) <doi:10.1007/978-94-007-6925-0>), iv)
calculate bioclimatic indices to evaluate fruit tree and grapevine adaptation (e.g. Badr
et al (2017) <doi:10.3354/cr01532>), v) estimate the incidence of weather-related disorders
in fruits (e.g. Snyder and de Melo-Abreu (2005, ISBN:92-5-105328-6) and vi)
estimate plant water requirements (Allen et al (1998, ISBN:92-5-104219-5)).

Carlos Miranda

fruclimadapt

Evaluation Tools for Assessing Climate Adaptation of Fruit Tree
Species

solar_times function

<dl><dt>latitude</dt>
<dd>the latitude of the site, in decimal degrees.</dd>
<dt>DOY</dt>
<dd>numeric value or vector specifying the
day of the year for which calculations should be done.</dd></dl>

Arguments

Estimation of the sunrise and sunset hour — solar_times

<dl>

<dt>latitude</dt>
<dd>the latitude of the site, in decimal degrees.</dd>


<dt>DOY</dt>
<dd>numeric value or vector specifying the
day of the year for which calculations should be done.</dd>

</dl>

solar_times: Estimation of the sunrise and sunset hour

Description

Usage

Value

Arguments

References

Examples