Package 'rpaleoclim'

Title: Download Paleoclimate Data from 'PaleoClim'
Description: 'PaleoClim' <http://www.paleoclim.org> (Brown et al. 2019, <doi:10.1038/sdata.2018.254>) is a set of free, high resolution paleoclimate surfaces covering the whole globe. It includes data on surface temperature, precipitation and the standard bioclimatic variables commonly used in ecological modelling, derived from the 'HadCM3' general circulation model and downscaled to a spatial resolution of up to 2.5 minutes. Simulations are available for key time periods from the Late Holocene to mid-Pliocene. Data on current and Last Glacial Maximum climate is derived from 'CHELSA' (Karger et al. 2017, <doi:10.1038/sdata.2017.122>) and reprocessed by 'PaleoClim' to match their format; it is available at up to 30 seconds resolution. This package provides a simple interface for downloading 'PaleoClim' data in R, with support for caching and filtering retrieved data by period, resolution, and geographic extent.
Authors: Joe Roe [aut, cre, cph]
Maintainer: Joe Roe <[email protected]>
License: MIT + file LICENSE
Version: 1.0.1.9000
Built: 2024-11-01 03:08:34 UTC
Source: https://github.com/joeroe/rpaleoclim

Help Index

Load data from PaleoClim

Description

Loads a PaleoClim data file (.zip format) into R as a SpatRaster.

Usage

load_paleoclim(file, as = c("terra", "raster"))

Arguments

file

Character. Path to a *.zip file downloaded from PaleoClim.
as

Character. as = "raster" returns a RasterStack object (see raster::stack()) instead of the default raster from the terra package. It is provided for backwards compatibility and will be removed in future versions. Requires the raster package.

Value

SpatRaster object (see terra::rast()) with each bioclimatic variable as a separate named layer.

Examples

file <- system.file("testdata", "LH_v1_10m_cropped.zip",
                    package = "rpaleoclim")
load_paleoclim(file)

Retrieve data from PaleoClim

Description

Downloads data from PaleoClim (http://www.paleoclim.org) and loads it into R as a SpatRaster object.

Usage

paleoclim(
  period = c("lh", "mh", "eh", "yds", "ba", "hs1", "lig", "mis19", "mpwp", "m2", "cur",
    "lgm"),
  resolution = c("10m", "5m", "2_5m", "30s"),
  region = NULL,
  as = c("terra", "raster"),
  skip_cache = FALSE,
  cache_path = fs::path_temp(),
  quiet = FALSE
)

Arguments

period

Character. Time period to retrieve.
resolution

Character. Resolution to retrieve.
region

SpatExtent object or object that can be coerced to SpatExtent (see terra::ext()), describing the region to be retrieved. If NULL, defaults to the whole globe.
as

Character. as = "raster" returns a RasterStack object (see raster::stack()) instead of the default raster from the terra package. It is provided for backwards compatibility and will be removed in future versions. Requires the raster package.
skip_cache

Logical. If TRUE, cached data will be ignored.
cache_path

Logical. Path to directory where downloaded files should be saved. Defaults to R's temporary directory.
quiet

Logical. If TRUE, suppresses messages and download progress information.

Details

See http://www.paleoclim.org for details of the datasets and codings. Data at 30s resolution is only available for 'cur' and 'lgm'.

By default, paleoclim() will read previously downloaded files in R's temporary directory if available. Use skip_cache = TRUE to override this. cache_path can also be set to another directory. This can be useful if you want to reuse downloaded data between sessions.

Value

SpatRaster object (see terra::rast()) with each bioclimatic variable as a separate named layer.

Examples

paleoclim("lh", "10m")