Driscoll, C.T., G.B. Lawrence, A.J. Bulger, T.J. Butler, C.S. Cronan, C. Eagar, K.F. Lambert, G.E. Likens, J.L. Stoddard and K.C. Weathers. 2001. Acidic deposition in the northeastern U.S.: sources and inputs, ecosystems effects, and management strategies. BioScience 51:180-198.
Photo of a rain gauge for measuring precipitation quantity (left) and a wet-dry collectors for measuring precipitation chemistry as part of the National Atmospheric Deposition Program (NADP).
Relationships between annual volume-weighted concentrations of sulfate and nitrate in bulk precipitation at the Hubbard Brook Experimental Forest, NH and emissions of sulfur dioxide and nitrogen oxides, respectively, from the airshed of the northeastern U.S. defined from 24 hr back-trajectory analysis. Data are from G.E. Likens.