Dissolved calcium and pH raster layers for freshwater environments in Canada and the USA

Calcium concentration and pH are key parameters that are linked to
multiple chemical and biological processes in freshwater environments.
This dataset presents high-resolution (10 x 10 km) interpolated raster
layers for these two variables across Canada and the continental USA.
These layers were generated via spatial interpolation (Kriging with a
fixed zero nugget) after comparison of multiple interpolation methods,
using water quality data for lakes and rivers compiled from multiple
sources. This is the first time that such data have been made available at
this scale and resolution, providing a valuable resource for research,
including projects evaluating risks from environmental change, pollution,
and invasive species.