envirem: envirem

In envirem: Generation of ENVIREM Variables

envirem

Description

Generation of bioclimatic rasters that are complementary to the typical 19 bioclim variables.

Details

Package: envirem
Type: Package
Version: 2.2
Date: 2020-06-03
License: GPL-2 | GPL-3

NOTE: Temperature rasters are now assumed by default to be in degrees C and precipitation in mm. rasters in degrees C * 10. Worldclim v2 uses degrees C. CHELSA has several options, depending on whether rasters are downloaded as floating point or integer. Therefore, there is an argument tempScale to specify the units of temperature, and precipScale to define precipitation units:

For example:
If using worldclim v1 data where temperature is in degrees C * 10, specify tempScale = 10.
If using worldclim v2 where temperature is in degrees C, specify tempScale = 1.
For CHELSA, read the documentation and carefully examine the rasters.

If a function does not have the tempScale argument, then the function is not sensitive to the units of the input temperature rasters.

Of course, it is also perfectly acceptable to leave tempScale = 1 and precipScale = 1 and modify the input rasters yourself.

The main function for generating ENVIREM rasters is generateEnvirem. A complete tutorial of this R package can be found at https://ptitle.github.io/envirem/.

Author(s)

Pascal O. Title, Jordan B. Bemmels

References

https://github.com/ptitle/envirem

Title, P.O., Bemmels, J.B. 2018. ENVIREM: An expanded set of bioclimatic and topographic variables increases flexibility and improves performance of ecological niche modeling. Ecography 41:291–307.

See Also

Useful links:

• https://github.com/ptitle/envirem

• Report bugs at https://github.com/ptitle/envirem/issues

envirem documentation built on Aug. 26, 2023, 1:07 a.m.