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

Current Methods

  • Dendrochonology

    Extracted two tree cores per tree perpendicular to dominant slope at stem DBH.

    Instrumentation: 5 mm increment borer

  • Tree ring measurement and crossdating

    Tree rings were measured to nearest 0.001 mm using Velmex sliding stage set up and crossdated using the list method

    Instrumentation: Velmex sliding stage apparatus, microscope

    Software: COFECHA

    Quality Control Measures: Cores were rejected if they did not correlate to the master (under the critical threshold)

  • Climate correlations

    Bootstrapped response function analysis over the common period of 1925-2012

    Software: dplR and treeclim packages for R

    Quality Control Measures: alpha value set to 0.01 to account for multiple correlations

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
Approx_age_at_Breast_HeightApprox_age_at_Breast_Height

Measurement type: Nominal
CoreCore

Core A or B

Measurement type: Ordinal
DBHDBH

Diameter at breast height (1.37 m)

Measurement type: Nominal
D_or_CDDominant or codominant crown

Assessment of position of crown in canopy

Measurement type: Nominal
Dominant/Codominant
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ElevationElevation

Altitude of center of plot, in meters (a.s.l)

Measurement type: Nominal
NotesNotes

Measurement type: Nominal
Number_of_RingsNumber_of_Rings

Number of rings estimated if reached pith or using a pith estimator

Measurement type: Nominal
PlotPlot

Measurement type: Nominal
SpeciesSpecies

Measurement type: Nominal
Species
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TitleTitle

Measurement type: Nominal
TransectTransect

Measurement type: Nominal
Tree_NumberTree_Number

Measurement type: Nominal

Sampling Equipment

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

Current Equipment

  • Plot design

    Variable radius plots

  • Tree cores

    Two cores per tree

  • Tree selection

    12-14 trees per species per plot, arranged around plot center

Site Characteristics

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

  • Site Description

    Stowe Nordic Center

    Minimum Altitude: 0

    Maximum Altitude: 0