Forest Ecosystem Monitoring Cooperative

Atmospheric Mercury Network (AMNet): Continuous monitoring of elemental and reactive mercury: Gaseous Elemental, Gaseous Oxidized and Particulate-Bound Mercury Flux

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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: Gaseous Elemental, Gaseous Oxidized and Particulate-Bound Mercury Flux
  • Start Date: 2013-06-12
  • End Date: 2016-01-04
  • Description: Flux of gaseous elemental, gaseous oxidized and particulate-bound mercury measured with automated instrumentation at Proctor Maple Research Center

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

  • Condensed Title: Z0318_GaseousElementalReactiveMercuryFlux

  • Object Name: VMC.318.309

  • 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. FEMC. Can be found at: Gaseous Elemental, Gaseous Oxidized and Particulate-Bound Mercury Flux

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

Attribute List

    Attribute Name: lampV_Avg
    • Label: Average lamp voltage
    • Description: Average voltage of the lamp in the analyzer during sampling
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: volt
    • Precision: 0.0000001
    • Unit: volt
    • Number Type: real
    Attribute Name: RECORD
    • Label: Record number
    • Description: Instrument-assigned identification number for the record
    • Storage Type: int
    • Measurment Type: interval
    • Standard Unit: number
    • Precision: 1
    • Unit: number
    • Number Type: integer
    Attribute Name: T1baseln
    • Label: Baseline voltage
    • Description: Baseline reading emitted by zero air (no mercury)
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: volt
    • Precision: 0.001
    • Unit: volt
    • Number Type: real
    Attribute Name: T1blnstd
    • Label: Baseline voltage standard deviation
    • Description: Standard deviation of the baseline level
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: volt
    • Precision: 0.001
    • Unit: volt
    • Number Type: real
    Attribute Name: T1event
    • Label: Sample event
    • Description: Code indicating the type of sample (elemental, reactive, particulate) assayed
    • Storage Type: int
    • Measurment Type: nominal
    • Custom List: CodesForHgSampleEventType
      • Code: 0
        • Definition: GEM
      • Code: 1
        • Definition: Flush
      • Code: 2
        • Definition: Pyrolyzer heating
      • Code: 3
        • Definition: PBM2.5 heating
      • Code: 4
        • Definition: GOM heating
    Attribute Name: T1HgConc
    • Label: Sample concentration
    • Description: Concentration of mercury in the sample
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: customPicogramsPerCubicMeter
    • Precision: 0.001
    • Unit: PicogramsPerCubicMeter
    • Number Type: real
    Attribute Name: TIMESTAMP
    • Label: Record timestamp
    • Description: Time the record was captured
    • Storage Type: datetime
    • Measurment Type: datetime
    • String Format: YYYY-MM-DD hh:mm:ss
    Attribute Name: time_of_year
    • Label: Day and time of year
    • Description: Day of year plus decimal representation of hours, minutes and seconds
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: nominalDay
    • Precision: 0.0001
    • Unit: nominalDay
    • Number Type: real
      • Bounds:
      • Minimum: 0
      • Maximum: 365
    Attribute Name: TkCartridge
    • Label: Instrument cartridge sampled
    • Description: The cartridge within the instrument from which sample was analyzed
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: TkDate
    • Label: Instrument date
    • Description: Date as set on the instrument
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: Tkhour
    • Label: Instrument hour
    • Description: Hour as set on the instrument
    • Storage Type: int
    • Measurment Type: ratio
    • Standard Unit: nominalHour
    • Precision: 1
    • Unit: nominalHour
    • Number Type: integer
      • Bounds:
      • Minimum: 0
      • Maximum: 23
    Attribute Name: Tkmin
    • Label: Instrument minute
    • Description: Minutes as set on the instrument
    • Storage Type: int
    • Measurment Type: ratio
    • Standard Unit: nominalMinute
    • Precision: 1
    • Unit: nominalMinute
    • Number Type: integer
      • Bounds:
      • Minimum: 0
      • Maximum: 59
    Attribute Name: TkPeakArea
    • Label: Peak area
    • Description: Area under the curve recorded by Cold Vapor Atomic Fluorescence Spectroscopy analysis
    • Storage Type: int
    • Measurment Type: ratio
    • Standard Unit: dimensionless
    • Precision: 1
    • Number Type: integer
    Attribute Name: TkPeakMax
    • Label: Peak voltage
    • Description: Maximum voltage obtained during the sample analysis phase
    • Storage Type: decimal
    • Measurment Type: ratio
    • Standard Unit: volt
    • Precision: 0.001
    • Unit: volt
    • Number Type: real
    Attribute Name: TkSmpDuration
    • Label: Sample period duration
    • Description: Duration of the sampling period
    • Storage Type: int
    • Measurment Type: ratio
    • Standard Unit: second
    • Precision: 1
    • Unit: second
    • Number Type: integer
    Attribute Name: TkSmpVolume
    • Label: Sample volume
    • Description: Volume of the sample analyzed
    • Storage Type: int
    • Measurment Type: ratio
    • Standard Unit: liter
    • Precision: 1
    • Unit: liter
    • Number Type: integer
    Attribute Name: TkStatus
    • Label: Instrument status code
    • Description: Code indicating nature of operation of each cartridge
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: TkTime
    • Label: Instrument time
    • Description: Time as set on the instrument
    • Storage Type: datetime
    • Measurment Type: datetime
    • String Format: other
    Attribute Name: TkType
    • Label: Mode of operation
    • Description: Type of operation the instrument ran during time period
    • Storage Type: text
    • Measurment Type: nominal
    Attribute Name: T_2537A_C_Avg
    • Label: Average temperature of analyzer
    • Description: Analyzer's average temperature during sampling
    • Storage Type: decimal
    • Measurment Type: interval
    • Standard Unit: celsius
    • Precision: 0.00001
    • Unit: celsius
    • Number Type: real

Methods

  • Current Methods
    • Unnamed Method
      • Started: 2005-05-01
      • 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 CR3000Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

    • Unnamed Method
      • Started: 2005-05-01
      • 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 CR3000Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNetQuality Control Measures: As alternating cartridges are used for the measurements, cartridge bias is evaluated as part of data validation

    • Unnamed Method
      • Started: 2005-05-01
      • 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 CR3000Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

    • Unnamed Method
      • Started: 2005-05-01
      • 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 CR3000Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet


Sampling Equipment

  • Mercury analyzer, data logger
    • Started: 2005-05-01
      Ended: 2016-01-04
    • Sampling Description: Software consists of Tekran 2537 analyzer program and Campbell Scientific LoggerNet

  • Mercury analyzer, sampler, micrologger
    • Started: 2005-05-01
      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 meter

  • Maximum Altitude: 399 meter