Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)
This data set represents the average normalized atmospheric (wet) deposition, in kilograms, of 
Ammonium (NH4) for the year 2002 compiled for every catchment of NHDPlus for the conterminous 
United States. Estimates of NH4 deposition are based on National Atmospheric Deposition Program 
(NADP) measurements (B. Larsen, …