Dataset: Raw Forest Canopy Meteorological Tower Data

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

Sampling Equipment

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

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