Annual Isopleth Maps

Isopleths maps of precipitation-weighted mean concentrations and depostion are available for NTN and MDN.

Use our interactive Map Viewer to view images of the isopleth maps, or to download PDF or KLM versions.

More about the maps

The subset of sites that are included on the maps consist of only the ones that met the NADP Completeness Criteria for the annual period.

If you intend on reprinting any of these maps for use in a publication, please read our Use Conditions.