• 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

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.

• dataset_eml_attributelistlabel: AdTim

• dataset_eml_attributelistdescription: AdTim

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Area

• dataset_eml_attributelistdescription: Area

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio

• dataset_eml_attributelistlabel: Bl

• dataset_eml_attributelistdescription: Bl

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio

• dataset_eml_attributelistlabel: BlDev

• dataset_eml_attributelistdescription: BlDev

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio

• dataset_eml_attributelistlabel: C

• dataset_eml_attributelistdescription: C

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Date

• dataset_eml_attributelistdescription: Date

• dataset_eml_attributeliststoragetype: date

• dataset_eml_attributelistmeasurementtype: datetime
• dataset_eml_attributelistformatstring: DD/MM/YYYY

• dataset_eml_attributelistlabel: DateTime

• dataset_eml_attributelistdescription: DateTime

• dataset_eml_attributeliststoragetype: datetime

• dataset_eml_attributelistmeasurementtype: datetime
• dataset_eml_attributelistformatstring: M-DD-YYYY hh:mm:ss

• dataset_eml_attributelistlabel: Event

• dataset_eml_attributelistdescription: Event

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: HgConcentration

• dataset_eml_attributelistdescription: Mercury concentration

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio

• dataset_eml_attributelistlabel: MaxV

• dataset_eml_attributelistdescription: MaxV

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: interval

• dataset_eml_attributelistlabel: Stat

• dataset_eml_attributelistdescription: Stat

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Time

• dataset_eml_attributelistdescription: Time

• dataset_eml_attributeliststoragetype: time

• dataset_eml_attributelistmeasurementtype: datetime
• dataset_eml_attributelistformatstring: hh:mm:ss

• dataset_eml_attributelistlabel: Typ

• dataset_eml_attributelistdescription: Typ

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Vol

• dataset_eml_attributelistdescription: Vol

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio

• Tekran mercury concentration
  • dataset_eml_methodsStartDate: 2005-05-01
    dataset_eml_methodsEndDate: 2016-01-04
    
  • dataset_eml_methoddescription: The Tekran 2537 system measures mercury concentration using cold vapor atomic fluorescence spectroscopy (CVAFS).
  • dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
  • dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• Gaseous elemental mercury
  • dataset_eml_methodsStartDate: 2005-05-01
    dataset_eml_methodsEndDate: 2016-01-04
    
  • dataset_eml_methoddescription: 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.
  • dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
  • dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet
  • dataset_eml_methodsQAQC: As alternating cartridges are used for the measurements, cartridge bias is evaluated as part of data validation

• Gaseous and particulate bound mercury
  • dataset_eml_methodsStartDate: 2005-05-01
    dataset_eml_methodsEndDate: 2016-01-04
    
  • dataset_eml_methoddescription: 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.
  • dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
  • dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• Desorbtion
  • dataset_eml_methodsStartDate: 2005-05-01
    dataset_eml_methodsEndDate: 2016-01-04
    
  • dataset_eml_methoddescription: 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.
  • dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000
  • dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• Tekran 1130/1135
• dataset_eml_samplingdescription: See Methods for details