Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaUnited States Environmental Protection Agency (EPA) leadVermont Monitoring Cooperative partnerAquatic Acidification Index pilot study to measure airborne sulfur and nitrogen oxide concentrationsAcidification of waterbodies is linked to deposition of sulfur and nitrogen oxides. This project will assess the relationship between a proposed index of aquatic acidification due to airborne pollutants and the concentrations in air of ammonia, ammonium, nitrogen oxides and sulfur oxides. Data comes from participation in both the Ammonia Monitoring Network (AMoN) and EPA's CASTNet. AMoN is a NADP network measuring NH3 concentrations across the United States with the goal of providing long term trends in ambient NH3 concentrations and depositions. The VMC air quality site began participating in this network in November 2012 as a component of the AAI. CASTNET is a national air quality monitoring network designed to provide data to assess trends in air quality, atmospheric deposition, and ecological effects due to changes in air pollutant emissions.CASTNET measurements are used to assess long-term, regional trends in sulfur and nitrogen pollutants.Aquatic Acidification Index pilot study to measure airborne sulfur and nitrogen oxide concentrationsPendletonMiriamScheffeRichwater chemistryacid neutralizing capacityatmospheric depositionaquatic acidification indexCastnet Filter Pack Weekly Concentrations2012-11-13Weekly concentrations of NOx, SOX, Ca, Na, Mg, K and Cl for use in Aquatic Acidification modelThis project will assess the relationship between a proposed index of aquatic acidification due to airborne pollutants and the concentrations in air of ammonium, nitrogen oxides and sulfur oxides.Z0312_Weekly_ConcentrationsVMC.312.411mySQLU.S. Environmental Protection Agency Clean Air Markets Division Clean Air Status and Trends Network (CASTNET) [Data table(s) accessed (i.e., Hourly Ozone, Annual Total Deposition)] Available at www.epa.gov/castnet Date accessed: [month day, year]/femc/data/archive/project/aquatic-acidification-index-pilot-study-to/dataset/weekly-concentrationsSITE_IDSite IDSite identification codetextYEARYearCalendar year of measurement using standard Tuesday to Tuesday weeksdatetimeYYYYWEEKWeekWeek of year as defined by the first Tuesday to Tuesday week of the year intcustomWeek1integer153DATEONDate OnDate and time standard Tuesday to Tuesday period began Local Standard TimedatetimeYYYY-MM-DDThh:mm:ssDATEOFFDate OffDate and time standard Tuesday to Tuesday period ended Local Standard TimedatetimeYYYY-MM-DDThh:mm:ssSO2_CONCSO2 ConcentrationMean ambient sulfur dioxide (SO2) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realSO4_CONCSO4 ConcentrationMean ambient particulate sulfate (SO4) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realNO3_CONCNO3 ConcentrationMean ambient particulate nitrate (NO3) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realHNO3_CONCHNO3 ConcentrationMean ambient nitric acid (HNO3) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realTNO3_CONCTNO3 ConcentrationTotal ambient nitrate (NO3+HNO3) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realNH4_CONCNH4 ConcentrationMean ambient particulate ammonium (NH4) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realCA_CONCCa ConcentrationMean ambient particulate calcium (Ca) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realNA_CONCNa ConcentrationMean ambient particulate sodium (Na) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realMG_CONCMg ConcentrationMean ambient particulate magnesium (Mg) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realK_CONCK ConcentrationMean ambient particulate potassium (K) concentrationdecimalcustomMicrogramsPerCubicMeter0.001realCL_CONCCl ConcentrationMean ambient particulate chloride (Cl) concentrationdecimalcustomMicrogramsPerCubicMeter0.001real