Type: Package
Package: varunayan
Title: Download and Process ERA5, IMD, HadEX3 and CRU TS Climate Data
Version: 0.2.0
Authors@R: c(
    person("Saket", "Choudhary", , "saketc@iitb.ac.in", role = c("aut", "cre", "cph"),
           comment = c(ORCID = "0000-0001-5202-7633")),
    person("Darakhshan", "Nehal", role = "aut")
  )
Description: Download and process climate data for custom geographical
        regions defined by bounding boxes, 'GeoJSON' polygons, or point
        coordinates. Supports the fifth generation European Centre for
        Medium-Range Weather Forecasts atmospheric reanalysis ('ERA5';
        Hersbach et al. (2020) <doi:10.1002/qj.3803>) from the
        'Copernicus' Climate Data Store (CDS)
        <https://cds.climate.copernicus.eu/>, India Meteorological
        Department (IMD) gridded rainfall and temperature (Pai et al.
        (2014) <doi:10.54302/mausam.v65i1.851>), Hadley Centre global
        land climate extremes indices version 3 ('HadEX3'; Dunn et al.
        (2020) <doi:10.1029/2019JD032263>), and Climatic Research Unit
        gridded Time Series ('CRU TS'; Harris et al. (2020)
        <doi:10.1038/s41597-020-0453-3>). Also computes heat stress
        indices including heat index, wet-bulb temperature, outdoor
        wet-bulb globe temperature (Liljegren et al. (2008)
        <doi:10.1080/15459620802310770>) and the Universal Thermal
        Climate Index (Bröde et al. (2012)
        <doi:10.1007/s00484-011-0454-1>), and heat exposure indicators
        for health studies: heatwave and warm-night frequency and
        duration under India Meteorological Department and percentile
        definitions, the Excess Heat Factor (Nairn and Fawcett (2015)
        <doi:10.3390/ijerph120100227>) and diurnal temperature range.
License: MIT + file LICENSE
URL: https://varunayan.saketlab.org/R/,
        https://github.com/saketlab/varunayanR
BugReports: https://github.com/saketlab/varunayanR/issues
Depends: R (>= 4.1.0)
Imports: data.table, digest, dplyr, ecmwfr (>= 2.0.0), httr, jsonlite,
        lubridate, magrittr, ncdf4, rlang, sf, stars, stats, terra,
        tools, utils, parallel
Suggests: ggplot2, ggpubr, gridExtra, knitr, maps, ncmeta, patchwork,
        R.utils, rmarkdown, scales, testthat (>= 3.1.7), tidyr, units,
        withr (>= 2.5.0)
VignetteBuilder: knitr
Config/roxygen2/version: 8.1.0
Config/testthat/edition: 3
Encoding: UTF-8
Roxygen: list(markdown = TRUE)
Config/pak/sysreqs: libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev
        libsecret-1-dev libnetcdf-dev libssl-dev libproj-dev
        libsqlite3-dev libudunits2-dev
Repository: https://saketlab.r-universe.dev
Date/Publication: 2026-10-12 16:29:41 UTC
RemoteUrl: https://github.com/saketlab/varunayanR
RemoteRef: HEAD
RemoteSha: 4a294632424defd72ad8e0834c49ab1833e5f10b
NeedsCompilation: no
Packaged: 2026-10-12 23:13:05 UTC; root
Author: Saket Choudhary [aut, cre, cph] (ORCID:
    <https://orcid.org/0000-0001-5202-7633>),
  Darakhshan Nehal [aut]
Maintainer: Saket Choudhary <saketc@iitb.ac.in>