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

  • Sample collection

    Each tree was between 50 and 90 feet tall. Three leaves were collected from a single branch selected from each cardinal direction in the lower crown of the tree. Branch samples were obtained using a shotgon loaded with steel shot.

  • Moisture analysis

    One leaf was retained for moisture analysis. Tissue was removed with a hole-punch from the remaining two leaves of the sample to be used for carbohydrate analysis. The remaining tissue from these two leaves was used for all subsquent chemical and color analysis.

Past Methods (No longer in use)

  • Foliage samples
    Started: 1998-08-01
    Ended: 1998-12-31

    Five mature sugar maple trees are sampled weekly from within the forest (these are the same trees used in the tree phenology monitoring project conducted by Vermont Forestry Division) and five trees on forest edge. Weekly foliage samples are analyzed for foliar moisture, nitrogen, nutrients, and carbohydrate content.

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
415(Dif)415(Dif)

415(Dif)

Ratio Units:
415(Dir)415(Dir)

415(Dir)

Ratio Units:
415(Tot)415(Tot)

415(Tot)

Ratio Units:
500(Dif)500(Dif)

500(Dif)

Ratio Units:
500(Dir)500(Dir)

500(Dir)

Ratio Units:
500(Tot)500(Tot)

500(Tot)

Ratio Units:
610(Dif)610(Dif)

610(Dif)

Ratio Units:
610(Dir)610(Dir)

610(Dir)

Ratio Units:
610(Tot)610(Tot)

610(Tot)

Ratio Units:
665(Dif)665(Dif)

665(Dif)

Ratio Units:
665(Dir)665(Dir)

665(Dir)

Ratio Units:
665(Tot)665(Tot)

665(Tot)

Ratio Units:
862(Dif)862(Dif)

862(Dif)

Ratio Units:
862(Dir)862(Dir)

862(Dir)

Ratio Units:
862(Tot)862(Tot)

862(Tot)

Ratio Units:
940(Dif)940(Dif)

940(Dif)

Ratio Units:
940(Dir)940(Dir)

940(Dir)

Ratio Units:
940(Tot)940(Tot)

940(Tot)

Ratio Units:
AirmassAirmass

Airmass

Ratio Units:
Azimuth_degreesPosNorthAzimuth_degreesPosNorth

Azimuth_degreesPosNorth

Ratio Units:
Decl_degreesDecl_degrees

Decl_degrees

Ratio Units:
DoYDoY

DoY

Ratio Units:
Elev_degreesElev_degrees

Ratio Units:
LocalStandardTimeDayLocalStandardTimeDay

LocalStandardTimeDay

Interval Units:
LocalStandardTimeHourLocalStandardTimeHour

LocalStandardTimeHour

Interval Units:
LocalStandardTimeMinuteLocalStandardTimeMinute

LocalStandardTimeMinute

Interval Units:
LocalStandardTimeMonthLocalStandardTimeMonth

LocalStandardTimeMonth

Interval Units:
LocalStandardTimeSecondLocalStandardTimeSecond

LocalStandardTimeSecond

Interval Units:
LocalStandardTimeYearLocalStandardTimeYear

LocalStandardTimeYear

Interval Units:
QcCode_semicolondelimiteddescofknwnprobswdata0ifnoneQcCode_semicolondelimiteddescofknwnprobswdata0ifnone

QcCode_semicolon delimited desc of knwn probs w/ data 0 if none

Nominal
SerialNumberSerialNumber

SerialNumber

Nominal
SiteSite

Site

Nominal
SoldistSoldist

Soldist

Ratio Units:
Unf(Dif)Unf(Dif)

Ratio Units:
Unf(Dir)Unf(Dir)

Unf(Dir)

Ratio Units:
Unf(Tot)Unf(Tot)

Unf(Tot)

Ratio Units:
UTCDayUTCDay

UTCDay

Interval Units:
UTCHourUTCHour

Interval Units:
UTCMinuteUTCMinute

UTCMinute

Interval Units:
UTCMonthUTCMonth

UTCMonth

Interval Units:
UTCSecondsUTCSeconds

UTCSeconds

Interval Units:
UTCYearUTCYear

UTCYear

Interval Units:
uvbb(W/m^2)erythemalirradiancefromYankeebroadbandsensoruvbb(W/m^2)erythemalirradiancefromYankeebroadbandsensor

uvbb(W/m^2) erythemalir radiance from Yankee broad band sensor

Ratio Units:
ZenZen

Zen

Ratio Units:

Sampling Equipment

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

Current Equipment

  • Shotgun

    Shotgun loaded with steel shot to obtain branch samples.

Site Characteristics

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

  • Site Description

    Mature sugar maple stand at the Proctor Maple Research Center.