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.



  • Vapor phase sampling ended in September 2001.

Past Methods (No longer in use)


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

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


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

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

    Instrumentation: Gold-coated sand vapor traps


  • 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

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
IDSample I D

Sample identification number

Measurement type: Nominal
DateOnMonth of Year

Month sample was taken

Measurement type: DateTime
Date/Time Format:
siteSite

Site where sample originated

Measurement type: Nominal
Sample_numberLaboratory Sample Number

Sample number assigned by laboratory

Measurement type: Nominal
CombinedConc_NG_m3Mercury Concentration

Mercury Concentration in Nanograms per cubic meter

Measurement type: Ratio
Units:
flagQuality Control Flag

Laboratory quality control flag

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

    Glass-fiber particulate filters for particulate-phase mercury sampling

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

    Gold-coated sand vapor traps for vapor-phase mercury sampling

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.