varunayan: Download and Process 'ERA5', IMD, 'HadEX3' and 'CRU TS' Data
Download climate data for a bounding box, polygon or point and return tidy tables. Sources are the 'ERA5' reanalysis (Hersbach et al. (2020) <doi:10.1002/qj.3803>) from the 'Copernicus' Climate Data Store <https://cds.climate.copernicus.eu/>, India Meteorological Department (IMD) gridded rainfall and temperature (Pai et al. (2014) <doi:10.54302/mausam.v65i1.851>), 'HadEX3' climate extremes (Dunn et al. (2020) <doi:10.1029/2019JD032263>) and 'CRU TS' (Harris et al. (2020) <doi:10.1038/s41597-020-0453-3>). Computes heat stress indices, including 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 heatwave indicators, including the Excess Heat Factor (Nairn and Fawcett (2015) <doi:10.3390/ijerph120100227>).
| Version: | 0.4.0 |
| 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) |
| Published: | 2026-10-29 |
| DOI: | 10.32614/CRAN.package.varunayan (may not be active yet) |
| Author: | Saket Choudhary 
[aut, cre, cph],
Darakhshan Nehal [aut],
James C. Liljegren [ctb] (Author of the original WBGT C code),
UChicago Argonne, LLC [cph] (Copyright holder of the original WBGT C
code) |
| Maintainer: | Saket Choudhary <saketc at iitb.ac.in> |
| BugReports: | https://github.com/saketlab/varunayan/issues |
| License: | MIT + file LICENSE |
| Copyright: | See file inst/COPYRIGHTS varunayan copyright details |
| URL: | https://varunayan.saketlab.org/R/, https://github.com/saketlab/varunayan |
| NeedsCompilation: | no |
| Language: | en-US |
| Materials: | README, NEWS |
| CRAN checks: | varunayan results |
Documentation:
| Reference manual: | varunayan.html , varunayan.pdf |
| Vignettes: |
Quickstart guide (source, R code) |
Downloads:
| Package source: | varunayan_0.4.0.tar.gz |
| Windows binaries: | r-devel: not available, r-release: varunayan_0.4.0.zip, r-oldrel: not available |
| macOS binaries: | r-release (arm64): varunayan_0.4.0.tgz, r-oldrel (arm64): varunayan_0.4.0.tgz, r-release (x86_64): varunayan_0.4.0.tgz, r-oldrel (x86_64): varunayan_0.4.0.tgz |
Linking:
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