You are here

Harvard Forest Data Archive

HF283

Continuous Measurement of Canopy Fluorescence at Harvard Forest since 2013

Related Publications

Data

  • hf283-01: solar induced fluorescence data measured at Harvard Forest Barn Tower in 2013 (preview)
  • hf283-02: solar induced fluorescence data measured at Harvard Forest Barn Tower in 2014 (preview)

Overview

  • Lead: Jim Tang
  • Investigators: Mary Heskel, Zhunqiao Liu, Jonanthan Michelsen, Hualei Yang, Xi Yang
  • Contact: Jim Tang
  • Start date: 2013
  • End date: 2014
  • Status: ongoing
  • Location: Prospect Hill Tract (Harvard Forest)
  • Latitude: +42.539 to +42.542
  • Longitude: -72.185 to -72.180
  • Elevation: 355 to 380 meter
  • Taxa:
  • Release date: 2017
  • Revisions:
  • EML file: knb-lter-hfr.283.3
  • DOI: digital object identifier
  • Related links:
  • Study type: long-term measurement
  • Research topic: forest-atmosphere exchange
  • LTER core area: primary production
  • Keywords: canopies, carbon cycling, fluorescence, phenology, photosynthesis
  • Abstract:

    Vegetation fluorescence, a very small amount of radiation emitted as a byproduct of photosynthesis, is a direct indicator of plant physiology. Monitoring the solar-induced plant fluorescence provides a powerful tool to understand how the plant photosynthesis responds to environmental factors such as solar radiation, temperature and precipitation as well as to stress and disturbance. We installed the ground-based fluorescence observation system to explore the Franhofer lines in the solar spectrum to monitor the canopy fluorescence. Fluorescence data could also be used to link with eddy covariance data in flux towers, the digital camera data and solar radiation data, providing a good supplementary to numerous data collected at HF.

  • Methods:

    The system consists of two parts: the tower part and the ground part. The tower part consists of two fiber optics and conduits to protect the fiber. The fiber optics will be installed at 30 m height that connected to a spectraradiometer placed on the ground. The conduits (pipes) will be 0.5 inches in diameter. Each pipe will be 10 feet long and connected with connectors. The 'boom' for the fiber optics will be a PVC pipe. They face north. The pipes will be zip-tied (or use metal clamp) to attach to the tower. The ground part includes a laptop and an electric cooler, both of which will be kept in a water-proof box.

  • Use:

    This dataset is released to the public under Creative Commons license CC BY (Attribution). Please keep the designated contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement.

  • Citation:

    Tang J. 2017. Continuous Measurement of Canopy Fluorescence at Harvard Forest since 2013. Harvard Forest Data Archive: HF283.

Detailed Metadata

hf283-01: solar induced fluorescence data measured at Harvard Forest Barn Tower in 2013

  1. datetime: date and time of measurement
  2. doy: day of year in 2013 (unit: nominalDay / missing value: NA)
  3. sif.30: solar induced fluorescence at 30 minute average (unit: milliwattPerMeterSquaredPerSteradianPerNanometer / missing value: NA)

hf283-02: solar induced fluorescence data measured at Harvard Forest Barn Tower in 2014

  1. date: date of measurement
  2. doy: day of year in 2014 (unit: nominalDay / missing value: NA)
  3. canopy.sif: solar induced fluorescence (unit: milliwattPerMeterSquaredPerSteradianPerNanometer / missing value: NA)