BioLake bioclimatic variables based on ERA5-Land lake temperature estimates 1991-2020

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.

本BioLake栅格数据集提供了基于湖水温度估算的12个生物气候变量的全球格网估算结果，空间分辨率约为10.0×12.4 km。12个变量中的11个（BioLake01至BioLake11）针对三类湖泊水层分别完成估算：湖混合层（表层）、湖底层以及全湖水柱。上述11个变量与CHELSA（地球陆面高分辨率气候学数据集，Climatologies at high resolution for the earth's land surface areas）的生物气候变量BIO1至BIO11一一对应，二者的核心差异在于：本BioLake变量基于湖水温度构建，而CHELSA的BIO1至BIO11变量则基于气温计算。CHELSA生物气候变量的空间分辨率更高，约为1×1 km。第12个变量（BioLake20，即冰盖覆盖率非零的月份数）未对应任何CHELSA生物气候变量。本数据集以摩尔威德投影（World Mollweide Projection）下的多层栅格文件（.grd格式）提供，同时附带包含图层名称的头文件（.gri格式）。