Concept information
Preferred term
NTN
Definition
- National Trends Network (NTN): NTN is a 200-site network located in rural sites where rain and snow are collected weekly. Precipitation samples are analyzed by the Central Analytical Laboratory (CAL) at the Illinois State Water Survey for constituents, including nitrate, sulfate, pH, and other major ions. Field and lab quality assurance programs are included in the cost of the network to insure good quality data that are comparable among sites. Data are presented in both tabular and graphical format on the web and in special publications within ninety days in draft form. Sponsors include federal and state agencies, universities, public utilities and industry groups. For more information, link to "http://www.aqd.nps.gov/ard/gas/NADP%20fact%20sheet.pdf" [Summary provided by NPS] (en)
Broader concept
- M - O (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/9ad39f2c-d00c-4804-9616-940b9ce4a8a6
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