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

  • Meteorological and ozone data
    Started: 1992-07-07

    Meteorology and ozone data collected at five heights: 0.5, 7.5, 12, 16, and 24 m. Continuous measurements averaged quarter-hourly; hourly and daily averages computed. Year-round measurements for meteorology and soil; April-October measurements of ozone.

  • Measurements
    Started: 1992-07-07

    Measurements include: ambient air temperature, relative humidity, surface wetness, wind speed, direction and direction variance, PAR, total irradiance, and UV-B at 24 m, ozone concentration, soil temperature and snow depth.



  • CO2 flux and concentration measurements ended in September 2000.

Past Methods (No longer in use)

  • CO2 analysis
    Started: 1999-05-01
    Ended: 1999-12-30

    CO2 concentration in air and analysis of CO2 flux using micrometeorological methods at top of canopy.

  • CO2 flux
    Started: 1999-05-01
    Ended: 1999-12-30

    CO2 flux from soil using monthly soda-lime chamber method.

  • Vegetation mapping
    Started: 1999-05-01
    Ended: 1999-12-30

    Mapping of vegetation within 100 meters of forest tower.


  • Started: 1992-07-07
    Ended: 1999-08-01

    Ozone measurements ended in August 1999.


  • Started: 1992-07-07
    Ended: 2000-07-01

    UV-B measurements ended in July 2000.


  • Started: 1992-07-07
    Ended: 2001-07-13

    Instrumentation was removed from the 12 meter level on July 13, 2001.

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
AirTempAirTemp

AirTemp

Ratio Units:
Airtemp05Air temp at 5m

Air temp at 5m

Ratio Units:
Airtemp12Air temp at 12m

Air temp at 12m

Ratio Units:
Airtemp16Air temp at 16m

Air temp at 16m

Ratio Units:
Airtemp24Air temp at 24m

Air temp at 24m

Ratio Units:
Airtemp75Air temp at 7.5m

Air temp at 7.5m

Ratio Units:
Date/TimeDate/Time

Date/Time

DateTime Date/Time Format: YYYY-MM-DD hh:mm:ss
doyDay of Year

The day of the year of observation

Interval
Unit: day
Precision: 1
horizws05horiz wind speed at 5m

horiz wind speed at 5m

Ratio Units:
horizws12horiz wind speed at 12m

horiz wind speed at 12m

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horizws16horiz wind speed at 16m

horiz wind speed at 16m

Ratio Units:
horizws24horiz wind speed at 24m

horiz wind speed at 24m

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horizws75horiz wind speed at 7.5m

horiz wind speed at 7.5m

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Leafwet05Leafwet at 5m

Leafwet at 5m

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Leafwet12Leafwet at 12m

Leafwet at 12m

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Leafwet16Leafwet at 16m

Leafwet at 16m

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Leafwet24Leafwet at 24m

Leafwet at 24m

Ratio Units:
Leafwet75Leafwet a 7.5m

Leafwet a 7.5m

Ratio Units:
maxws05max wind speed at 5m

max wind speed at 5m

Ratio Units:
maxws12max wind speed at 12m

max wind speed at 12m

Ratio Units:
maxws16max wind speed at 16m

max wind speed at 16m

Ratio Units:
maxws24max wind speed at 24m

max wind speed at 24m

Ratio Units:
maxws75max wind speed at 7.5m

max wind speed at 7.5m

Ratio Units:
parPhoto. Active Radiation (PAR)

Photo. Active Radiation (PAR)

Ratio Units:
resulwd05resul wind direction at 5m

resul wind direction at 5m

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resulwd12resul wind direction at 12m

resul wind direction at 12m

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resulwd16resul wind direction at 16m

resul wind direction at 16m

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resulwd24resul wind direction at 24m

resul wind direction at 24m

Ratio Units:
resulwd75resul wind direction at 7.5m

resul wind direction at 7.5m

Ratio Units:
resulws05resul wind speed at 5m

resul wind speed at 5m

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resulws12resul wind speed at 12m

resul wind speed at 12m

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resulws16resul wind speed at 16m

resul wind speed at 16m

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resulws24resul wind speed at 24m

resul wind speed at 24m

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resulws75resul wind speed at 7.5m

resul wind speed at 7.5m

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Rhumid05Rel humidity at 5m

Rel humidity at 5m

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Rhumid12R humidity at 12m

R humidity at 12m

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Rhumid16Rel humidity at 16m

Rel humidity at 16m

Ratio Units:
Rhumid24Rel humidity at 24m

Rel humidity at 24m

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Rhumid75Rel humidity at 7.5m

Rel humidity at 7.5m

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sdevwd05std dev wind direction at 5m

std dev wind direction at 5m

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sdevwd12std dev wind direction at 12m

std dev wind direction at 12m

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sdevwd16std dev wind direction at 16m

std dev wind direction at 16m

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sdevwd24std dev wind direction at 24m

std dev wind direction at 24m

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sdevwd75std dev wind direction at 7.5m

std dev wind direction at 7.5m

Ratio Units:
SoilTemp1Plot 1: Soil Temperature (2 cm above ground)

Plot 1: Soil Temperature (2 cm above ground)

Interval Units:
SoilTemp2Plot 1: Soil Temperature (5 cm)

Plot 1: Soil Temperature (5 cm)

Interval Units:
SoilTemp3Plot 1: Soil Temperature (15 cm)

Plot 1: Soil Temperature (15 cm)

Interval Units:
SoilTemp4Plot 1: Soil Temperature (30 cm)

Plot 1: Soil Temperature (30 cm)

Interval Units:
Soiltemp5Plot 2: Soil Temperature (2 cm above ground)

Plot 2: Soil Temperature (2 cm above ground)

Interval Units:
Soiltemp6Plot 2: Soil Temperature (5 cm)

Plot 2: Soil Temperature (5 cm)

Interval Units:
SoilTemp7Plot 2: Soil Temperature (15 cm)

Plot 2: Soil Temperature (15 cm)

Interval Units:
SoilTemp8Plot 2: Soil Temperature (30 cm)

Plot 2: Soil Temperature (30 cm)

Interval Units:
TimeTime

Time

DateTime Date/Time Format:
totalradtotal radiation

total radiation

Ratio Units:
UVBUltraviolet B

Ultraviolet B

Interval Units:
NotesNotes

Notes


Sampling Equipment

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

No sampling equipment recorded for this dataset

Site Characteristics

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

  • Site Description

    Proctor Maple Research Center on the west slope of Mount Mansfield, with a west/southwest aspect on a 2% slope; forest canopy tower 71 ft. (22m) height. Surrounding forest is intermediate-aged northern hardwood, with Lyman-Marlow association soil type..

Dataset Notes

Notes describing any special conditions or considerations for understanding the quality and consistency of the data


Start Date End Date Note Date Entered
2016-07-25 10:00:002016-07-25 12:00:00Replaced tower pyranometer, quantum and temperature/relative humidity sensors from canopy tower top level; fixed arm at 3rd level; replaced CR 21X with CR-1000 but programming is not complete2016-08-02 00:00:00