Rocky Mountains – 2007 & 2008 Mapping Critical Loads of Atmospheric N and S deposition in the Rocky Mountains Jasmine Saros, Heather Arnett Critical Loads are the amount of deposition of a given pollutant that an ecosystem can receive below which ecological effects are thought not to occur.  In the proposed study, maps will be read more Mapping Critical Loads of Atmospheric N and S Deposition in the Rocky Mountains