Filters: Tags: Ammonium (X) > Date Range: {"choice":"year"} (X)
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This data set represents National Atmospheric Deposition Program (NADP) National Trends Network average of annual precipitation-weighted mean atmospheric deposition for seven select constituents from years 1985-2014 compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. The seven constiuents presented here are: Calcium, Nitrate, Sulfate, Inorganic Nitrogen, Magnesium, Ammonium, and Chloride. Units are kilograms per hectare. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The source data was produced by...
This data release provides estimates of monthly wet atmospheric deposition of total inorganic nitrogen (TIN)--the summation of nitrate (NO3) and ammonium (NH4) ions--for the conterminous United States from 1999 through 2020 in units of kilograms nitrogen per square kilometer per month with spatial reference ESPG 4326. The spatial resolution of the gridded data provided in this release is approximately 5 km. The source data used to provide wet deposition estimates include monthly atmospheric concentration data interpolated between National Atmospheric Deposition Program (NADP, 2022) observation stations and monthly precipitation estimates from the National Oceanic and Atmospheric Administration's ClimGrid data (NOAA,...
Categories: Data;
Tags: Ammonium,
Ammonium,
Atmospheric Wet Deposition,
Atmospheric Wet Deposition,
Geochemistry,
Two sets of PHREEQC input and output files are provided that illustrate the distribution of aqueous ammonium and ammonia as a function of physical (temperature) and chemical (pH and solution composition) conditions. One set of simulations calculates the distribution of aqueous ammonia and aqueous ammonium over a range of temperatures and pH values in different solution compositions. The other set of simulations illustrates how aqueous ammonia concentrations in a water body change over time owing to changes in pH and temperature, how ammonia concentrations potentially toxic to salmonids (trout and salmon) can occur owing to changes in pH and temperature, and how these changes in ammonia concentration can be calculated...
Categories: Data;
Tags: Aquatic Biology,
Environmental Health,
Geochemistry,
Hydrology,
USGS Science Data Catalog (SDC),
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