Calculations of BioLake climate data


Climate data allow people to examine species distributions and possible distributions. This script takes ERA5-Land climate estimates ( for precipitation and lake temperature and processes them to create summary climate layers for use with biological organisms in lakes. This code could be modified to use a different subset of years.

These BioLake raster data provide global estimates (~10.0 x 12.4 km resolution) of twelve bioclimatic variables based on estimated lake temperature. Eleven of these twelve variables (BioLake01 - BioLake11) are estimated for each of three lake strata: lake mix (surface) layer, lake bottom, and total lake water column. These eleven variables correspond to CHELSA (Climatologies at high resolution for the earth's land surface areas) bioclimatic variables BIO1 - BIO11, except that these BioLake variables are based on lake water temperature and CHELSA BIO1 - BIO11 variables are based on air temperature. CHELSA BIO is also calculated a finer spatial resolution (~1 x 1 km). The twelfth variable (BioLake20; months with non-zero ice cover) does not correspond to any CHELSA bioclimatic variable. The data are supplied as a multi-layer raster (.grd) file in the World Mollweide projection, accompanied by a header file (.gri) with layer names.

For BioLake layer download, see

Publication details
Published Date: 2022-11-01
Outlet/Publisher: USGS GitLab
Media Format: URL

ARMI Organizational Units:
Midwest - Biology
Climate Change; Invasive Species; Quantitative Developments; Stressors; Water
Place Names:
bioclimate; BioLake; climate; climate change; code; lake temperature; raster; software; surface water; water temperature
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