hadex3_geojson: Download HadEX3 data on climate extremes for a GeoJSON region

In varunayan: Download and Process 'ERA5', IMD, 'HadEX3' and 'CRU TS' Data

Download HadEX3 data on climate extremes for a GeoJSON region

Description

Downloads HadEX3 data on ETCCDI climate extremes and filters the data to a geographic region. A GeoJSON polygon defines the region.

Usage

HadEX3Geojson(...)

hadex3_geojson(
  index,
  start_year,
  end_year,
  geojson_file,
  frequency = "annual",
  baseline = "61-90",
  output_dir = tempdir(),
  use_cache = TRUE
)

Arguments

...	Arguments that the aliases send to the primary function.
index	ETCCDI index name (e.g. "TXx", "Rx1day"). See list_hadex3_indices().
start_year	Start year (1901-2018).
end_year	End year (1901-2018).
geojson_file	Path to a GeoJSON file that defines the region.
frequency	Temporal frequency: "annual" or "monthly" (default: "annual").
baseline	Reference period for the indices that use percentiles: "61-90" (default) or "81-10". This argument applies only to the annual frequency.
output_dir	Directory for temporary files (default: tempdir()).
use_cache	If TRUE, use the data in the cache (default: TRUE).

Value

A data.frame with the columns: year (and month for monthly data), latitude, longitude, value, index.

Examples

region <- system.file("extdata", "region.geojson", package = "varunayan")
data <- hadex3_geojson(
  index = "TXx",
  start_year = 1981, end_year = 2010,
  geojson_file = region
)

varunayan documentation built on Oct. 30, 2026, 1:07 a.m.