SGS-LTER Data from National Atmospheric Deposition Program - Station CO22 on the Central Plains Experimental Range, Nunn, Colorado, USA 1979 -

National Atmospheric Deposition Program wet deposition data are available as trends, annually, seasonally, monthly, weekly, and daily. The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) is a nationwide network of precipitation monitoring sites. The network is a cooperative effort between many different groups, including the State Agricultural Experiment Stations, U.S. Geological Survey, U.S. Department of Agriculture, and numerous other governmental and private entities. For a full list of contributors, see the collaborating agencies page. The NADP/NTN has grown from 22 stations at the end of 1978, our first year, to over 250 sites spanning the continental United States, Alaska, and Puerto Rico, and the Virgin Islands.
(http://nadp.sws.uiuc.edu/nadpoverview.asp)

国家大气沉降计划（National Atmospheric Deposition Program）可提供趋势性、年度、季节、月度、周度及日度的湿沉降数据。
国家大气沉降计划/国家趋势监测网（National Atmospheric Deposition Program/National Trends Network，简称NADP/NTN）是覆盖全美的降水监测站点网络。
该网络由多方合作共建，参与主体涵盖各州农业试验站、美国地质调查局、美国农业部，以及大量其他政府与私营机构。
完整的参与机构名单可参见合作机构页面。
NADP/NTN的站点规模已从其首个运营年度1978年末的22个站点，发展至超过250个，覆盖美国本土、阿拉斯加、波多黎各及美属维尔京群岛。
(http://nadp.sws.uiuc.edu/nadpoverview.asp)