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Harvard Forest Data Archive

HF249

Radiometric and Meteorological Data from Harvard Forest Barn Tower Since 2011

Related Publications

Data

Overview

  • Lead: Andrew Richardson, Donald Aubrecht
  • Investigators:
  • Contact: Andrew Richardson
  • Start date: 2011
  • End date: 2017
  • Status: ongoing
  • Location: Prospect Hill Tract (Harvard Forest)
  • Latitude: +42.5353
  • Longitude: -72.1899
  • Elevation: 351 meter
  • Taxa: Acer rubrum (red maple), Pinus strobus (white pine), Quercus rubra (red oak)
  • Release date: 2017
  • Revisions:
  • EML file: knb-lter-hfr.249.3
  • DOI: digital object identifier
  • Related links:
  • Study type: long-term measurement
  • Research topic: ecological informatics and modelling; forest-atmosphere exchange; physiological ecology, population dynamics and species interactions
  • LTER core area: primary production
  • Keywords: air temperature, net radiation, phenology, photosynthetically active radiation, relative humidity, solar radiation
  • Abstract:

    To better quantify the seasonal changes in canopy structure and physiological status (e.g. photosynthetic capacity or efficiency), and provide a more rigorous context for interpretation of the camera data, we installed an extensive set of radiometric instruments on the Harvard Forest Barn Tower beginning in 2011. A complete list of sensors is given in the Methods section. Note that these include both broad-band and narrow-band sensors, and sensors with hemispherical, narrow, and multi-angular fields of view.

  • Methods:

    Instruments

    Instrument: Kipp and Zonen CNR4 (4 channel net radiometer), Delft, the Netherlands. Measures: incoming SW (300-2800 nm), outgoing SW (300-2800 nm), incoming LW (4500-42000 nm), outgoing LW (4500-42000 nm). Location: top of tower (40 m).

    Instrument: Kipp and Zonen PQS1 (quantum sensor), Delft, the Netherlands. Measures: incoming PPFD (400-700 nm), outgoing PPFD (400-700 nm), below-canopy PPFD (400-700 nm). Locations: top of tower (40 m), 1.5 m above ground level at 4 locations.

    Instrument: Delta-T BF-5 (sunshine sensor), Cambridge, UK. Measures: incoming direct PPFD (400-700 nm), incoming diffuse PPFD (400-700 nm). Location: top of tower (30 m).

    Instrument: Skye 1850 (4 channel radiometric sensor), Llandrindod Wells, UK. Measures: incoming and reflected (blue: 470 ± 20 nm, green: 557 ± 25 nm, red: 605 ± 35 nm, NIR: 750 ± 42 nm). Location: top of tower (40 m).

    Instrument: Skye 1850 (4 channel radiometric sensor), Llandrindod Wells, UK. Measures: incoming and reflected (green 1: 530 ± 11 nm, green 2: 570 ± 10 nm, red: 650 ± 55 nm, NIR: 860 ± 60 nm). Location: top of tower (40 m).

    Instrument: Ryu LED (2 channel sensor), custom built: see Ryu et al. (2010). Measures: incoming and reflected, red and NIR bands (red: 646±56 nm, NIR: 843±72 nm). Location: top of tower (40 m).

  • 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:

    Richardson A, Aubrecht D. 2017. Radiometric and Meteorological Data from Harvard Forest Barn Tower Since 2011. Harvard Forest Data Archive: HF249.

Detailed Metadata

hf249-01: radiometric and meterological data

  1. date.time: end of half hour
  2. timestamp: timestamp date
  3. doy: day of year (unit: nominalDay / missing value: NA)
  4. batt.volt.min: minimum battery voltage (unit: volt / missing value: NA)
  5. logger.temp: panel temperature of logger (unit: celsius / missing value: NA)
  6. short.up: incident shortwave radiation, from upward looking pyranometer (unit: wattPerMeterSquared / missing value: NA)
  7. short.dn: reflected shortwave radiation, from downward looking pyranometer (unit: wattPerMeterSquared / missing value: NA)
  8. long.up: incident longwave radiation, from upward looking pyrgeometer (unit: wattPerMeterSquared / missing value: NA)
  9. long.dn: outgoing longwave radiation, from downward looking pyrgeometer (unit: wattPerMeterSquared / missing value: NA)
  10. cnr4.tc: temperature of 4-channel radiometer (unit: celsius / missing value: NA)
  11. cnr4.tk: temperature of 4-channel radiometer (unit: kelvin / missing value: NA)
  12. long.up.corr: incident longwave radiation, corrected for instrument temperature (unit: wattPerMeterSquared / missing value: NA)
  13. long.dn.corr: outgoing longwave radiation, corrected for instrument temperature (unit: wattPerMeterSquared / missing value: NA)
  14. rs.net: net shortwave radiation (unit: wattPerMeterSquared / missing value: NA)
  15. rl.net: net longwave radiation (unit: wattPerMeterSquared / missing value: NA)
  16. albedo: albedo (unit: dimensionless / missing value: NA)
  17. rn: net radiation (unit: wattPerMeterSquared / missing value: NA)
  18. incident.ppfd: incident photosynthetic photon flux density (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  19. reflected.ppfd: reflected photosynthetic photon flux density (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  20. tpar.0: below-canopy (Transmitted) photosynthetic photon flux density, micomoles PAR m-2 s-1 (sensor 1 of 4) (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  21. tpar.1: below-canopy (Transmitted) photosynthetic photon flux density, micomoles PAR m-2 s-1 (sensor 2 of 4) (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  22. tpar.2: below-canopy (Transmitted) photosynthetic photon flux density, micomoles PAR m-2 s-1 (sensor 3 of 4) (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  23. tpar.3: below-canopy (Transmitted) photosynthetic photon flux density, micomoles PAR m-2 s-1 (sensor 4 of 4) (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  24. total: total (=sum of direct and diffuse components) incident photoynthetic photon flux density, micromoles PAR m-2 s-1 (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  25. diffuse: diffuse incident photoynthetic photon flux density (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  26. direct: direct-beam incident photoynthetic photon flux density (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
  27. diam.1: automated band dendrometer measurement (tree 1 of 4) (unit: millivolt / missing value: NA)
  28. diam.2: automated band dendrometer measurement (tree 2 of 4) (unit: millivolt / missing value: NA)
  29. diam.3: automated band dendrometer measurement (tree 3 of 4) (unit: millivolt / missing value: NA)
  30. diam.4: automated band dendrometer measurement (tree 4 of 4) (unit: millivolt / missing value: NA)
  31. in.530: incident solar radiation at 530 nm (unit: millivolt / missing value: NA)
  32. in.570: incident solar radiation at 570 nm (unit: millivolt / missing value: NA)
  33. in.655: incident solar radiation at 655 nm (unit: millivolt / missing value: NA)
  34. in.860: incident solar radiation at 860 nm (unit: millivolt / missing value: NA)
  35. in.470: incident solar radiation at 470 nm (unit: millivolt / missing value: NA)
  36. in.560: incident solar radiation at 560 nm (unit: millivolt / missing value: NA)
  37. in.605: incident solar radiation at 605 nm (unit: millivolt / missing value: NA)
  38. in.750: incident solar radiation at 750 nm (unit: millivolt / missing value: NA)
  39. out.530: reflected solar radiation at 530 nm (unit: millivolt / missing value: NA)
  40. out.570: reflected solar radiation at 570 nm (unit: millivolt / missing value: NA)
  41. out.655: reflected solar radiation at 655 nm (unit: millivolt / missing value: NA)
  42. out.860: reflected solar radiation at 860 nm (unit: millivolt / missing value: NA)
  43. out.470: reflected solar radiation at 470 nm (unit: millivolt / missing value: NA)
  44. out.560: reflected solar radiation at 560 nm (unit: millivolt / missing value: NA)
  45. out.605: reflected solar radiation at 605 nm (unit: millivolt / missing value: NA)
  46. out.750: reflected solar radiation at 750 nm (unit: millivolt / missing value: NA)
  47. r.530: canopy reflectance at 530 nm, % (unit: dimensionless / missing value: NA)
  48. r.570: canopy reflectance at 570 nm, % (unit: dimensionless / missing value: NA)
  49. r.655: canopy reflectance at 655 nm, % (unit: dimensionless / missing value: NA)
  50. r.860: canopy reflectance at 860 nm, % (unit: dimensionless / missing value: NA)
  51. r.470: canopy reflectance at 470 nm, % (unit: dimensionless / missing value: NA)
  52. r.560: canopy reflectance at 560 nm, % (unit: dimensionless / missing value: NA)
  53. r.605: canopy reflectance at 605 nm, % (unit: dimensionless / missing value: NA)
  54. r.750: canopy reflectance at 750 nm, % (unit: dimensionless / missing value: NA)
  55. pri: photochemical reflectance index, calculated using measurements at 530 and 570 nm (unit: dimensionless / missing value: NA)
  56. ndvi: normalized difference vegetation index (unit: dimensionless / missing value: NA)
  57. pri.r: alternative calculation of PRI (based on reflectance) (unit: dimensionless / missing value: NA)
  58. ndvi.r: alternative calculation of NDVI (based on reflectance) (unit: dimensionless / missing value: NA)
  59. in.red.led: LED sensor measurements of incident solar radiation, red band (unit: millivolt / missing value: NA)
  60. in.nir.led: LED sensor measurements of incident solar radiation, NIR band (unit: millivolt / missing value: NA)
  61. out.red.led: LED sensor measurements of reflected radiation, red band (unit: millivolt / missing value: NA)
  62. out.nir.led: LED sensor measurements of reflected radiation, NIRband (unit: millivolt / missing value: NA)
  63. tair: air temperature (unit: celsius / missing value: NA)
  64. rh: relative humidity, % (unit: dimensionless / missing value: NA)