Ammonium Concentration in Precipitation Measured at Olympic National Park Hoh Ranger Station



Ammonium (NH_4) concentration (mg/L) in precipitation measured at Olympic National Park, Hoh Ranger Station (WA14), weekly or every other week from January 6, 2009 through December 20, 2011.




A data frame with 102 observations on the following 6 variables.


Start of collection period. Date on which the sample bucket was installed on the collector.


End of collection period. Date on which the sample bucket was removed from the collector.


a numeric vector indicating the cumulative week number starting from January 1, 2009.

a character vector of the original NH_4 concentrations reported either as the observed value or less than some detection limit. For values reported as less than a detection limit, the value reported is the actual limit of detection or, in the case of a diluted sample, the product of the detection limit value and the dilution factor.

a numeric vector of NH_4 concentrations with non-detects coded to their detection limit.


a logical vector indicating which observations are censored.


  • StationOlympic National Park-Hoh Ranger Station (WA14)

  • LocationJefferson County, Washington

  • Latitude47.8597

  • Longitude-123.9325

  • Elevation182 meters

  • USGS 1:24000 Map NameOwl Mountain

  • Operating AgencyOlympic National Park

  • Sponsoring AgencyNPS-Air Resources Division


National Atmospheric Deposition Program, National Trends Network (NADP/NTN).

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