Details and Metadata

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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)


  • Started: 1999-06-01
    Ended: 1999-12-31

    On August 19, 1999, a sediment core was acquired from the deep hole in Branch Pond, in the main lake body and in the southmost of two distinct hypolimnetic holes, within the Lye Brook Wilderness Area.


  • Started: 1999-06-14
    Ended: 1999-12-31

    The core was acquired from a depth of 10.1 meters and capped before breaching the surface. Details of sampling and analysis procedures are documented in Kaman et. al., 1997, Quality Assurance Project Plan, Assessment of Mercury in Hypolimnetic Lake-bed sediments of Vermont and New Hampshire.

  • Data analysis
    Started: 1999-06-14
    Ended: 1999-12-31

    A REMAP Project. Vt. DEC, Waterbury. Analysis included: %C, %N, statble isotopes (C13, N15), Hg, %solids, loss on ignition (LOI), Pb210.

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
DAR_Age_yrsDAR_Age_yrs

DAR = Dating and Accumulation rates

Measurement type: Ratio
Units:
DAR_Sed_AccumDAR_Sed_Accum

DAR = Dating and Accumulation rates, Sediment accoumulation-g/cm2/yr

Measurement type: Ratio
Units:
DAR_Strata_DateDAR_Strata_Date

DAR = Dating and Accumulation rates

Measurement type: Ratio
Units:
HCCFR_HgFluxHCCFR_HgFlux- ug/m2/yr

HCFFR=Hg concentrations,fluxes, and flux ratios

Measurement type: Ratio
Units:
HCFFR_Perc_OFModernHCFFR_%OFModern

HCFFR=Hg concentrations,fluxes, and flux ratios

Measurement type: Ratio
Units:
HCFFR_SHG_UG_G_DHCFFR_SHG_UG_G_D

HCFFR=Hg concentrations,fluxes, and flux ratios

Measurement type: Ratio
Units:
HCFFR__Flux_ratio_Perc_of_BaselineHCFFR__Flux ratio % of Baseline

HCFFR=Hg concentrations,fluxes, and flux ratios

Measurement type: Ratio
Units:
LakeIdLakeId

LakeId

Measurement type: Nominal
Sediment_characteristics_Perc_LOISediment_characteristics_Perc_LOI

Sediment_characteristics_Perc_LOI

Measurement type: Ratio
Units:
Sediment_characteristics_Perc_SolidsSediment_characteristics_% Solids

Sediment_characteristics_% Solids

Measurement type: Ratio
Units:
Sediment_interval_Base_CMSediment_interval_Base_CM

Sediment_interval_Base_CM

Measurement type: Ratio
Units:
Sediment_interval_Top_CMSediment_interval_Top_CM

Sediment_interval_Top_CM

Measurement type: Ratio
Units:

Sampling Equipment

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

Past Sampling Equipment (No longer in use)

  • Gravity corer
    Started: 1999-06-01
    Ended: 1999-12-31

    The core was acquired uing a Glew-design gravity corer, equipped with a 70 cm X 6.5 cm (I.d.) Lexan core tube, which was previously acid cleaned in 10% HNO3. Lot-certified 20 ml and 125 ml PETE bottles.

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection

No site characteristics recorded for this dataset