getIsoscapes {assignR}

Download and unpack isoscapes from the web

Description

This function retrieves gridded isotope maps from waterisotopes.org, unpacks the zip archives, and bundles the map layers as a RasterStack.

Usage

getIsoscapes(isoType = "GlobalPrecipGS", timeout = 1200)

Arguments

isoType

character string indicating which isoscapes are requested: see 'Details'.

timeout

integer. Maximum allowed file download time, in seconds. Some isoscape archives exceed 2 GB in size and may require long download times on slow connections. This option may not work on all system configurations.

Details

Accepted isoType values are:

"GlobalPrecipGS"

Global growing-season precipitation H and O isotope values

"GlobalPrecipMA"

Global mean-annual precipitation H and O isotope values

"GlobalPrecipMO"

Global monthly precipitation H and O isotope values

"GlobalPrecipALL"

Global mean-annual and monthly precipitation H and O isotope values

"USPrecipMA"

High-resolution contiguous USA mean-annual precipitation H and O isotope values

"USPrecipMO"

High-resolution contiguous USA monthly precipitation H and O isotope values

"USPrecipALL"

High-resolution contiguous USA mean-annual and monthly precipitation H and O isotope values

"USSurf"

High-resolution contiguous USA surface water H and O isotope values

"USTap"

High-resolution contiguous USA surface water H and O isotope values

"USGround"

Contiguous USA groundwater H and O isotope values in 7 depth intervals

"GlobalSr"

High-resolution bioavailable Sr isotope ratios for the global land surface

"USSr"

High-resolution contiguous USA Sr isotope ratios

"CaribSr"

High-resolution Sr isotope ratios for the circum-Caribbean region

Value

RasterStack containing the requested isoscape layers.

References

https://wateriso.utah.edu/waterisotopes/pages/data_access/ArcGrids.html

Examples

## Not run: 
iso = getIsoscapes("CaribSr")

## End(Not run)