{ "_id": "6acd6b7ea14063b82c3ab509", "Type": "Package", "Package": "varunayan", "Title": "Download and Process ERA5, IMD, HadEX3 and CRU TS Climate Data", "Version": "0.2.0", "Authors@R": "c(\nperson(\"Saket\", \"Choudhary\", , \"saketc@iitb.ac.in\", role = c(\"aut\", \"cre\", \"cph\"),\ncomment = c(ORCID = \"0000-0001-5202-7633\")),\nperson(\"Darakhshan\", \"Nehal\", role = \"aut\")\n)", "Description": "Download and process climate data for custom geographical\nregions defined by bounding boxes, 'GeoJSON' polygons, or point\ncoordinates. Supports the fifth generation European Centre for\nMedium-Range Weather Forecasts atmospheric reanalysis ('ERA5';\nHersbach et al. (2020) ) from the\n'Copernicus' Climate Data Store (CDS)\n, India Meteorological\nDepartment (IMD) gridded rainfall and temperature (Pai et al.\n(2014) ), Hadley Centre global\nland climate extremes indices version 3 ('HadEX3'; Dunn et al.\n(2020) ), and Climatic Research Unit\ngridded Time Series ('CRU TS'; Harris et al. (2020)\n). Also computes heat stress\nindices including heat index, wet-bulb temperature, outdoor\nwet-bulb globe temperature (Liljegren et al. (2008)\n) and the Universal Thermal\nClimate Index (Bröde et al. (2012)\n), and heat exposure indicators\nfor health studies: heatwave and warm-night frequency and\nduration under India Meteorological Department and percentile\ndefinitions, the Excess Heat Factor (Nairn and Fawcett (2015)\n) and diurnal temperature range.", "License": "MIT + file LICENSE", "URL": "https://varunayan.saketlab.org/R/,\nhttps://github.com/saketlab/varunayanR", "BugReports": "https://github.com/saketlab/varunayanR/issues", "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\nlibsecret-1-dev libnetcdf-dev libssl-dev libproj-dev\nlibsqlite3-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", 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"wet_bulb_from_dewpoint", "wet_bulb_temperature" ], "_help": [ { "page": "aggregate_by_frequency", "title": "Aggregate data by temporal frequency", "topics": [ "aggregate_by_frequency" ] }, { "page": "aggregate_imd_by_frequency", "title": "Aggregate IMD data by temporal frequency", "topics": [ "aggregate_imd_by_frequency" ] }, { "page": "aggregate_to_polygons", "title": "Aggregate gridded data to polygon regions", "topics": [ "aggregate_to_polygons" ] }, { "page": "cache_stats", "title": "Get cache statistics", "topics": [ "cache_stats" ] }, { "page": "calc_heat_indices", "title": "Calculate all heat stress indices", "topics": [ "calc_heat_indices" ] }, { "page": "categorize_variables", "title": "Categorize variables by aggregation method", "topics": [ "categorize_variables" ] }, { "page": "check_grid_coverage", "title": "Check grid coverage statistics for polygons", "topics": [ "check_grid_coverage" ] }, { "page": "check_system_readiness", "title": "Check system readiness for varunayan operations", "topics": [ "CheckSystemReadiness", "check_system_readiness" ] }, { "page": "cleanup_temp_files", "title": "Clean up temporary files matching pattern", "topics": [ "cleanup_temp_files" ] }, { "page": "clear_timings", "title": "Clear all timing data", "topics": [ "clear_timings" ] }, { "page": "clear_cache", "title": "Clear cache", "topics": [ "ClearCache", "clear_cache" ] }, { "page": "combine_netcdf_files", "title": "Combine multiple NetCDF files into single data.frame", "topics": [ "combine_netcdf_files" ] }, { "page": "compare_grids", "title": "Compare multiple grids", "topics": [ "compare_grids" ] }, { "page": "convert_to_geojson", "title": "Convert data to GeoJSON format", "topics": [ "convert_to_geojson" ] }, { "page": "create_geojson_from_bbox", "title": "Create GeoJSON from bounding box coordinates", "topics": [ "create_geojson_from_bbox" ] }, { "page": "create_temp_geojson_file", "title": "Create temporary GeoJSON file", "topics": [ "create_temp_geojson_file" ] }, { "page": "create_temporal_chunks", "title": "Apply temporal chunking for large date ranges", "topics": [ "create_temporal_chunks" ] }, { "page": "cru_ts", "title": "CRU TS Gridded Climate Dataset", "topics": [ ".CRU_TS_VERSION", "cru_ts" ] }, { "page": "cru_ts_bbox", "title": "Download CRU TS climate data for a bounding box", "topics": [ "CRUTSBbox", "cru_ts_bbox" ] }, { "page": "cru_ts_geojson", "title": "Download CRU TS climate data for a GeoJSON region", "topics": [ "CRUTSGeojson", "cru_ts_geojson" ] }, { "page": "describe_variables", "title": "Describe ERA5 variables in detail", "topics": [ "DescribeVariables", "describe_variables" ] }, { "page": "download_era5_pressure", "title": "Download ERA5 pressure-level data using ecmwfr", "topics": [ "download_era5_pressure" ] }, { "page": "download_era5_single", "title": "Download ERA5 single-level data using ecmwfr", "topics": [ "download_era5_single" ] }, { "page": "download_imd_rainfall", "title": "Download IMD gridded rainfall data", "topics": [ "download_imd_rainfall" ] }, { "page": "download_imd_temperature", "title": "Download IMD gridded temperature data", "topics": [ "download_imd_temperature" ] }, { "page": "ensure_output_dir", "title": "Create output directory if it doesn't exist", "topics": [ "ensure_output_dir" ] }, { "page": "era5ify_bbox", "title": "Download and process ERA5 data for a bounding box", "topics": [ "ERA5ifyBbox", "era5ify_bbox" ] }, { "page": "era5ify_point", "title": "Download and process ERA5 data for a point location", "topics": [ "ERA5ifyPoint", "era5ify_point" ] }, { "page": "excess_heat_factor", "title": "Excess Heat Factor", "topics": [ "excess_heat_factor" ] }, { "page": "exclude_cols", "title": "Columns to exclude from aggregation", "topics": [ "exclude_cols" ] }, { "page": "exposure_indicators", "title": "Heat exposure indicators", "topics": [ "exposure_indicators" ] }, { "page": "extract_point_data", "title": "Extract data for specific point location (nearest neighbor)", "topics": [ "extract_point_data" ] }, { "page": "filter_dataframe_by_geojson", "title": "Filter data.frame by GeoJSON polygon", "topics": [ "filter_dataframe_by_geojson" ] }, { "page": "filter_imd_by_bbox", "title": "Filter IMD data by spatial boundaries", "topics": [ "filter_imd_by_bbox" ] }, { "page": "filter_imd_by_geojson", "title": "Filter IMD data by GeoJSON polygon", "topics": [ "filter_imd_by_geojson" ] }, { "page": "filter_netcdf_by_bbox", "title": "Filter NetCDF data by spatial boundaries (bounding box)", "topics": [ "filter_netcdf_by_bbox" ] }, { "page": "filter_netcdf_by_geojson", "title": "Filter NetCDF data by GeoJSON polygon", "topics": [ "filter_netcdf_by_geojson" ] }, { "page": "format_date_range", "title": "Format date range for CDS API requests", "topics": [ "format_date_range" ] }, { "page": "format_pressure_levels", "title": "Convert pressure levels to character format required by CDS API", "topics": [ "format_pressure_levels" ] }, { "page": "get_available_datasets", "title": "Get available dataset types", "topics": [ "get_available_datasets" ] }, { "page": "get_bbox_from_sf", "title": "Get bounding box from sf object", "topics": [ "get_bbox_from_sf" ] }, { "page": "get_cds_credentials", "title": "Get CDS API credentials from multiple sources", "topics": [ "get_cds_credentials" ] }, { "page": "get_imd_grid_specs", "title": "Get IMD grid specifications", "topics": [ "get_imd_grid_specs" ] }, { "page": "get_pressure_level_variable_names", "title": "Get all valid pressure-level variable names", "topics": [ "get_pressure_level_variable_names" ] }, { "page": "get_pressure_level_variables", "title": "Get pressure-level variables dataset", "topics": [ "get_pressure_level_variables" ] }, { "page": "get_single_level_variable_names", "title": "Get all valid single-level variable names", "topics": [ "get_single_level_variable_names" ] }, { "page": "get_single_level_variables", "title": "Get single-level variables dataset", "topics": [ "get_single_level_variables" ] }, { "page": "get_time_values", "title": "Get time values based on frequency", "topics": [ "get_time_values" ] }, { "page": "get_timings", "title": "Get all recorded timings", "topics": [ "get_timings" ] }, { "page": "get_available_pressure_levels", "title": "Get standard pressure levels available in ERA5", "topics": [ "GetAvailablePressureLevels", "get_available_pressure_levels" ] }, { "page": "get_cache_dir", "title": "Get cache directory path", "topics": [ "GetCacheDir", "get_cache_dir" ] }, { "page": "get_era5_country_temperature", "title": "Get ERA5 country-level temperature data", "topics": [ "GetERA5CountryTemperature", "get_era5_country_temperature" ] }, { "page": "GetERA5DailyClimate", "title": "Download daily ERA5 climate data", "topics": [ "GetERA5DailyClimate", "get_era5_daily_climate" ] }, { "page": "GetERA5DailyHeatIndexData", "title": "Download ERA5 data and calculate heat stress indices", "topics": [ "GetERA5DailyHeatData", "GetERA5DailyHeatIndexData", "get_era5_daily_heat_data", "get_era5_daily_heat_index_data" ] }, { "page": "GetERA5DailyHumidity", "title": "Download daily ERA5 humidity data", "topics": [ "GetERA5DailyHumidity", "get_era5_daily_humidity" ] }, { "page": "GetERA5DailyTemperature", "title": "Download daily ERA5 temperature data", "topics": [ "GetERA5DailyTemperature", "get_era5_daily_temperature" ] }, { "page": "GetERA5DailyWetBulb", "title": "Download daily ERA5 wet bulb temperature data", "topics": [ "GetERA5DailyWetBulb", "get_era5_daily_wet_bulb" ] }, { "page": "GetERA5DailyWind", "title": "Download daily ERA5 wind data", "topics": [ "GetERA5DailyWind", "get_era5_daily_wind" ] }, { "page": "GetERA5MonthlyHeatIndexData", "title": "Get monthly ERA5 heat stress index data", "topics": [ "GetERA5MonthlyHeatData", "GetERA5MonthlyHeatIndexData", "get_era5_monthly_heat_data", "get_era5_monthly_heat_index_data" ] }, { "page": "get_package_info", "title": "Get package version information", "topics": [ "GetPackageInfo", "get_package_info" ] }, { "page": "hadex3", "title": "HadEX3 Climate Extremes Dataset", "topics": [ ".HADEX3_ANNUAL_INDICES", "hadex3" ] }, { "page": "hadex3_bbox", "title": "Download HadEX3 climate extremes data for a bounding box", "topics": [ "HadEX3Bbox", "hadex3_bbox" ] }, { "page": "hadex3_geojson", "title": "Download HadEX3 climate extremes data for a GeoJSON region", "topics": [ "HadEX3Geojson", "hadex3_geojson" ] }, { "page": "heat_index", "title": "Calculate heat index (apparent temperature)", "topics": [ "heat_index" ] }, { "page": "heat_index_from_dewpoint", "title": "Calculate heat index from dewpoint", "topics": [ "heat_index_from_dewpoint" ] }, { "page": "heat_index_risk_category", "title": "Heat index risk categories", "topics": [ "heat_index_risk_category" ] }, { "page": "heat_stress", "title": "heat stress index calculations", "topics": [ "heat_stress" ] }, { "page": "heatwave_days", "title": "Heatwave days", "topics": [ "heatwave_days" ] }, { "page": "humidex", "title": "Calculate humidex (Canadian heat index)", "topics": [ "humidex" ] }, { "page": "imd_temperature_by_region", "title": "Download IMD temperature aggregated per GeoJSON feature (region x time)", "topics": [ "imd_temperature_by_region" ] }, { "page": "imd_terrain", "title": "IMD heatwave terrain class of a location", "topics": [ "imd_terrain" ] }, { "page": "imd_exposure_bbox", "title": "IMD heat exposure indicators for a bounding box", "topics": [ "IMDExposureBbox", "imd_exposure_bbox" ] }, { "page": "imd_rainfall_bbox", "title": "Download and process IMD rainfall data for a bounding box", "topics": [ "IMDRainfallBbox", "imd_rainfall_bbox" ] }, { "page": "imd_rainfall_geojson", "title": "Download and process IMD rainfall data for a GeoJSON region", "topics": [ "IMDRainfallGeojson", "imd_rainfall_geojson" ] }, { "page": "imd_rainfall_point", "title": "Download and process IMD rainfall for a single point (nearest grid cell)", "topics": [ "IMDRainfallPoint", "imd_rainfall_point" ] }, { "page": "imd_stations", "title": "IMD weather stations with coordinates", "topics": [ "IMDStations", "imd_stations" ] }, { "page": "imd_temperature_bbox", "title": "Download and process IMD temperature data for a bounding box", "topics": [ "IMDTemperatureBbox", "imd_temperature_bbox" ] }, { "page": "imd_temperature_geojson", "title": "Download and process IMD temperature data for a GeoJSON region", "topics": [ "IMDTemperatureGeojson", "imd_temperature_geojson" ] }, { "page": "india_elevation", "title": "Elevation of locations in India", "topics": [ "india_elevation" ] }, { "page": "is_max_var", "title": "Check if a variable should use maximum", "topics": [ "is_max_var" ] }, { "page": "is_min_var", "title": "Check if a variable should use minimum", "topics": [ "is_min_var" ] }, { "page": "is_rate_var", "title": "Check if a variable is a rate variable", "topics": [ "is_rate_var" ] }, { "page": "is_sum_var", "title": "Check if a variable should be summed", "topics": [ "is_sum_var" ] }, { "page": "is_valid_geojson", "title": "Check if data is valid GeoJSON", "topics": [ "is_valid_geojson" ] }, { "page": "list_cache", "title": "List cached files", "topics": [ "list_cache" ] }, { "page": "list_imd_datasets", "title": "List available IMD datasets", "topics": [ "list_imd_datasets" ] }, { "page": "list_available_variables", "title": "List all available variables for a dataset type", "topics": [ "ListAvailableVariables", "list_available_variables" ] }, { "page": "list_cru_ts_variables", "title": "Variable data dictionary for CRU TS", "topics": [ "ListCRUTSVariables", "list_cru_ts_variables" ] }, { "page": "list_hadex3_indices", "title": "List available HadEX3 ETCCDI indices", "topics": [ "ListHadEX3Indices", "list_hadex3_indices" ] }, { "page": "max_vars", "title": "Variables that should use maximum aggregation", "topics": [ "max_vars" ] }, { "page": "mean_radiant_temperature", "title": "Estimate mean radiant temperature", "topics": [ 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