Dry deposition of oxidized nitrogen in the United States Pacific Northwest for 2002

This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of dry deposition of oxidized nitrogen in the Pacific Northwest region of the United States (Hydro Region 17; Major River Basin 7 (MRB7)) during 2002.本空间数据集由美国地质调查局（USGS）编制，旨在表征2002年美国太平洋西北地区（水文区域17；主要流域7（MRB7））的氧化性氮干沉降量。