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

Past Methods (No longer in use)

  • Field collection
    Started: 2005-08-01
    Ended: 2015-03-03

    Samples are collected from a heated chamber by field operators using clean techniques.For detailed information go to: Full documentation

    Instrumentation: N-CON collector

  • Rain gage data
    Started: 2005-08-01
    Ended: 2015-03-03

    Rainfall is recorded to the nearest 0.01 inch and sampler opening and closing functions are checked. For details go to Full documentation

    Instrumentation: N-CON collector

  • Lab analysis
    Started: 2005-08-01
    Ended: 2015-03-03

    Samples are packed in protective coolers and sent to the MDN laboratory, Eurofins Frontier Global Sciences, Inc. in Seattle Washington, aka HAL (Hg Analystical Laboratory). For more details see Full documentation

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
Analysis_Aliquot_VolAnalysis of Aliquot Volume

Size of aliquot taken for analysis

Measurement type: Ratio
Units: millileters
Precision: 0.1
BottleBottle

Measurement type: Ratio
Units: inches
Precision: 0.01
Bottle_IDBottle ID

Unique idenifying number for the sample bottle

Measurement type: Nominal
CaptureCapture

Collection_End_DateCollection End Date

Date on which the event or collection period ended

Measurement type: DateTime
Date/Time Format: M/D/YYYY
GaugePrecipitation Gauge

Total amount of precipitation collected during sampling period

Measurement type: Ratio
Units: inches
Precision: 0.01
Hg_per_AliquotHg per Aliquot

Mercury

Measurement type: Ratio
Units: nanograms
Precision: 0.001
Lab_remarksLab Remarks

Notes from lab and field sample handlers on issues with sample

Measurement type: Nominal
NotesNotes

Codes for sample collection problems

Measurement type: Nominal
MDN Sample Problem Codes
+ show
Appears in data asMeaning of code
eextended sample time (> 8 days)
Precip_Hg_ConcPrecip Hg Conc

Concentration of mercury in precipitation sample

Measurement type: Ratio
Units: nanograms per liter
Precision: 0.01
Precip_VolPrecip Vol

Amount of precipitation collected during sampling event

Measurement type: Ratio
Units: milliliters
Precision: 0.1
QRQuality Rating

Code for quality of sample A=fully qualified with no problems; B=valid data with minor problems, used for summary statistics; C=invalid data, not used for summary statistics; - =no data submitted for this time period.

Measurement type: Nominal
Sample_TypeSample Type

Type of sample, see code list

Measurement type: Nominal
Site_IDSite ID

Site ID; VT98 is the site code for N-CON in Underhill VT

Measurement type: Nominal
Weekly_Hg_DepositionWeekly Hg Deposition

Weekly Mercury Deposition

Measurement type: Ratio
Units: nanograms per liter
Precision: 0.1

Sampling Equipment

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

Current Equipment

  • Weekly sampling
    Started: 2012-10-29

    Samples were collected and shipped on a weekly basis.

    Frequency: Weekly

Past Sampling Equipment (No longer in use)

  • Event based sampling
    Started: 2005-08-01
    Ended: 2012-10-29

    Samples were collected after each precipitation event

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 in an open field at the Proctor Maple Research Center. Site has a west aspect and an 8% slope. Elevation approximately 1300 feet.

    Minimum Altitude: 390 meters

    Maximum Altitude: 400 meters