Forest Ecosystem Monitoring Cooperative

Atmospheric Mercury Network (AMNet): Continuous monitoring of elemental and reactive mercury: Speciated Atmospheric Mercury Fractions

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Metadata Provider

  • Forest Ecosystem Monitoring Cooperative

    • Address:
      705 Spear Street
      South Burlington, Vermont 05403
      United States of America

      Phone: (802) 391-4135
      Email: femc@uvm.edu
      Website: www.uvm.edu/femc

Abstract

    This project measures atmospheric mercury fractions which contribute to dry and total mercury deposition. Proctor Maple Research Center and VMC participate in a network of sites collecting concentrations of atmospheric mercury species from automated, continuous measuring systems coordinated by the National Atmospheric Deposition Program.

People

  • Carl Waite: Principal Investigator

  • Miriam Pendleton: Content Provider

  • James Duncan: Principal Investigator

  • Mark Olson: Content Provider

Keywords

  • atmospheric deposition, flux, mercury, speciation,

Organizations

  • National Atmospheric Deposition Program AMNet: lead
  • Vermont Monitoring Cooperative : partner

Geographic Coverage

  • Coordinates

Data Table

  • Title: Speciated Atmospheric Mercury Fractions
  • Start Date: 2009-01-01
  • End Date: 2016-01-04
  • Description: Flux of gaseous elemental, gaseous oxidized and particulate-bound mercury measured with automated instrumentation (TEKRAN) at Proctor Maple Research Center from January 2009-January 2016.

  • Purpose: Measure the atmospheric concentrations of various species of mercury to better understand spatiotemporal patterns of mercury input into Vermont and the region, and to improve deposition models.

  • Condensed Title: Z0318_TKL5DM

  • Object Name: VMC.318.2295

  • Data Type: mySQL
  • Citation: National Atmospheric Deposition Program (NRSP-3). 2017. NADP Program Office, Illinois State Water Survey,University of Illinois, Champaign, IL 61820. (2017). Gaseous Elemental, Gaseous Oxidized and Particulate-Bound Mercury Flux. VMC. https://vmc.w3.uvm.edu/management/project/atmospheric-mercury-network-amnet-continuous-monitoring/dataset/amnet-gaseous-elemental-gaseous-oxidized-particulate

  • Online Distribution: https://vmc.w3.uvm.edu/vmcdevel/data/archive/project/atmospheric-mercury-network-amnet-continuous-monitoring/dataset/amnet-gaseous-elemental-gaseous-oxidized-particulate

Attribute List

    Attribute Name: All_GEM
    • Label: All_GEM
    • Storage Type: int
    • Measurment Type: interval
    • Precision: 1
    Attribute Name: collTime
    • Label: collTime
    • Storage Type: int
    • Measurment Type: interval
    Attribute Name: End_Date/Time
    • Label: End_Date/Time
    • Storage Type: datetime
    • Measurment Type: datetime
    • String Format: M/D/YYYY hh:mm
    Attribute Name: Excluded_GEM
    • Label: Excluded_GEM
    • Storage Type: int
    • Measurment Type: ratio
    • Precision: 1
    Attribute Name: GEM
    • Label: GEM
    • Storage Type: decimal
    • Measurment Type: ratio
    • Precision: 0.001
    Attribute Name: GOM
    • Label: GOM
    • Storage Type: decimal
    • Measurment Type: ratio
    • Precision: 0.001
    Attribute Name: GOMval
    • Label: GOMval
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: PBM
    • Label: PBM
    • Storage Type: decimal
    • Measurment Type: ratio
    • Precision: 0.001
    Attribute Name: PBMval
    • Label: PBMval
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: Possible_GEM
    • Label: Possible_GEM
    • Storage Type: int
    • Measurment Type: ratio
    • Precision: 1
    Attribute Name: Site_ID
    • Label: Site_ID
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: Start_Date/Time
    • Label: Start_Date/Time
    • Storage Type: datetime
    • Measurment Type: datetime
    • String Format: M/D/YYYY hh:mm
    Attribute Name: Valid_GEM
    • Label: Valid_GEM
    • Storage Type: int
    • Measurment Type: ratio
    • Precision: 1

Methods

  • Past Methods (no longer in use)
    • Overview
      • Started: 2009-01-01
        Ended: 2016-01-04
      • Method Description: The Tekran 2537 system measures mercury concentration using cold vapor atomic fluorescence spectroscopy (CVAFS).
      • Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
      • Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

    • GEM collection
      • Started: 2009-01-01
        Ended: 2016-01-04
      • Method Description: During the first 2 hours of operation, the Tekran 2537 measures the concentration of gaseous elemental mercury (GEM). These measurements are made directly and are presented as 5-minute averages. Each average results from the operation (i.e. collection and analysis) of one of two cartridges that operate in alternating fashion.
      • Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
      • Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet
      • Quality Control Measures: As alternating cartridges are used for the measurements, cartridge bias is evaluated as part of data validation

    • GOM and PBM Adsorbtion
      • Started: 2009-01-01
        Ended: 2016-01-04
      • Method Description: Gaseous oxidized mercury (GOM) and particulate-bound mercury of mean diameter less than or equal to 2.5 µm (PBM2.5) are adsorbed onto prepared glassware in the Tekran 1130/1135 speciation modules for two hours while simultaneously, the Tekran 2537A is analyzing gaseous elemental mercury (GEM) by drawing ambient air through the system.
      • Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
      • Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

    • Desorbtion
      • Started: 2009-01-01
        Ended: 2016-01-04
      • Method Description: After this two hour period, the system desorbs the glassware by heating the glassware in the speciation modules until the PBM2.5 and GOM are converted to gaseous elemental mercury which can then be detected by the 2537A. During this desorption, the system pumps zero air through the speciation modules so that no ambient air (which could contain mercury) is in the system. After one hour of desorption, the system returns to detecting GEM in ambient air.
      • Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
      • Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

Sampling Equipment

  • Mercury analyzer, data logger
    • Started: 2009-01-01
      Ended: 2016-01-04
    • Sampling Description: Software consists of Tekran 2537 analyzer program and Campbell Scientific LoggerNet

  • Mercury analyzer, sampler, micrologger
    • Started: 2009-01-01
      Ended: 2016-01-04
    • Sampling Description: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000

Site Characteristics

  • Site Description: West slope of Mount Mansfield in an open field at the Proctor Maple Research Center. Site has a west aspect and an 8% slope

  • Minimum Altitude: 399 meters

  • Maximum Altitude: 400 meters