Details and Metadata

Printer-friendly version     View XML version    Download Ecological Metadata Language file


Methods

The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures

Current Methods


  • Started: 1992-12-15

    Year-round daily wet-only precipitation sampling, every sixth day aerosol and vapor phase sampling (24 hour sample). Measurements include: total Hg in precipitation, vapor and particulate phases, 24 other trace elements.

Past Methods (No longer in use)

  • Air samples
    Started: 1992-12-15
    Ended: 1994-10-05

    24-hour sample of air collected every Wednesday and every 6th day to measure particulate phase levels of mercury.

    Instrumentation: Glass-fiber particulate filters for particulate sampling

  • Air samples
    Started: 1995-01-01
    Ended: 2001-12-31

    24-hour sample of air collected every 6th day to measure particulate phase levels of mercury


  • Started: 1992-12-15
    Ended: 1995-02-04

    Samples shipped to University of Michigan Air Quality Lab for analysis by cold vapor atomic fluorescence spectrometry

  • Air Samples
    Started: 2004-06-01
    Ended: 2008-12-31

    "Speciated mercury concentrations were measured using a Tekran model 2537A, 1130, and 1135 and followed early Atmospheric Mercury Network (AMNet) quality assurance protocols (Neff et al. 2012, NADP 2012). The Jan.2009 to Dec. 2014 mercury data was collected as part of AMNet and data quality assurance protocol followed the AMNet Data Management Manual (Neff et al. 2012)." (Zhou et al. 2017)

Dataset Fields

Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data


Field Name Caption Description Additional Information
BatchBatch

Batch identifier

Measurement type: Nominal
Date OnDate On

Date the filter pack was put on

Measurement type: DateTime
Date/Time Format:
SiteSite

Site code

Measurement type: Nominal
Sample # or CTL ngSample # or CTL ng

Sample # or CTL ng

Measurement type: Nominal
TAG1TAG1

Unknown

Measurement type: Nominal
STP corrected Air VolumeCorrected air volume

Air volume corrected to standard temperature and pressure (1013.25mb at 25C)

Measurement type: Ratio
Units:
Air Volume UnitsAir Volume Units

Units used to measure air volume

Measurement type: Nominal
Duration (min)Sample duration

Duration the filter pack was in place

Measurement type: Ratio
Unit: unavailable
Precision: 1
Hg Mean Field Blank Conc.Mean Field Blank Mercury Concentration

Mean concentration of mercury in the field blank

Measurement type: Ratio
Units:
Avg Analytical VolumeAverage Analytical Volume

Average volume of the analytical group

Measurement type: Ratio
Units:
Number of AnalysesNumber of Analyses

Number of analyses performed on sample

Measurement type: Ratio
Unit: unavailable
Precision: 1
Hg Mass on FilterMass of Mercury on Filter

Mass of mercury found on filter

Measurement type: Ratio
Units:
Hg non-STP corrected RESULTMercury Concentration (not corrected)

Mercury concentration before being corrected to standard temperature and pressure

Measurement type: Ratio
Units:
Hg STP corrected RESULTMercury Concentration (corrected)

Mercury concentration after being corrected to standard temperature and pressure

Measurement type: Ratio
Units:
RESULT UNITSConcentration Units

Units used in reporting final concentration results

Measurement type: Nominal
% RSD% RSD

Unknown

Measurement type: Interval
Unit: unavailable
Precision: 1
Analytical FlagAnalytical Flag

Analytical Flag

Measurement type: Nominal
EPA Analytic Remark CodeEPA Analytic Remark Code

Unknown

Measurement type: Nominal
Field Remark CodeField Remark Code

Unknown

Measurement type: Nominal

Sampling Equipment

Equipment and software used to collect data, including how that equipment was used.

Past Sampling Equipment (No longer in use)

  • Filter
    Started: 1992-12-16
    Ended: 1997-12-29

    Filter pack with a quartz glass filter and vacuum pump

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection

  • Site Description

    West slope of Mount Mansfield at the Proctor Maple Research Center.