Harvard Forest image
Home

Research

Data
Data archive

Publications

Professional and Education Opportunities

Staff and Contacts

Site Map and Search


Harvard Forest Logo

Hemlock Removal Experiment - Air and Soil Temperature

HF108 EML Publications Archive

Data

Overview

  • Lead: Aaron Ellison
  • Investigators: Audrey Barker Plotkin, Kristina Stinson
  • Contact: Aaron Ellison
  • Start date: 2004-11-15
  • End date: ongoing
  • Location: Simes Tract (Harvard Forest)
  • Latitude: +42.47
  • Longitude: -72.22
  • Elevation: 200 to 240 meters
  • Taxa: Acer spp. (maple), Betula spp. (birch), Pinus strobus (white pine), Quercus spp. (oak), Tsuga canadensis (eastern hemlock)
  • Research topic: plot
  • Study type: long-term measurement
  • LTER core area: disturbance
  • Keywords: canopy photographs, hemlock, hemlock woolly adelgid, light, Tsuga canadensis
  • Release date: 2005
  • EML version: knb-lter-hfr.108.9
  • Revisions: data updated 2009-02-14
  • Related links:
  • Abstract:

    The impending loss of hemlock trees due to hemlock woolly adelgid (Adelges tsugae) infestation is expected to lead to changes in the temperature regime of the forest understory. These changes will both drive succession and will themselves be altered by successional processes. Air temperature (1 m above forest floor) and soil temperature (at 10 cm depth) is measured at 1-minute intervals (hourly averages, minimum, and maximum are stored) using thermistors connected to Campbell 21-X dataloggers. Temperature measurements began 60-120 days prior to applications of the logging and girdling treatments, and will continue for the duration of the study.

  • Methods:

    Two thermistors are located in the center of each of the 6 experimental hemlock plots in the Simes Tract. One thermistor is mounted beneath a plywood platform, 1 meter above the soil surface, the other is buried 10 cm into the soil. Thermistors are connected to Campbell 21-X dataloggers. One datalogger services Plots 1, 2, and 3; the other datalogger services plots 4, 5, and 6. Dataloggers are powered by 12-volt deep-cycle batteries. Temperatures are measured each minute; hourly averages, minimum, and maximum values are stored; see program below. Data are manually downloaded at 21-28 day intervals (maximum datalogger storage is approximately 30 days). Data are checked for consistency, outliers, and sensor creep.

  • Use:

    This dataset is released to the public and may be freely downloaded. 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. For more information on LTER Network data access and use policies, please see: http://www.lternet.edu/data/netpolicy.html.

  • Citation:

    Ellison A. 2005 . Hemlock Removal Experiment - Air and Soil Temperature. Harvard Forest Data Archive: HF108.

Detailed Metadata

hf108-01: service notes

  1. service notes: equipment service notes

hf108-02: Campbell datalogger program

  1. datalogger program: Campbell datalogger program

hf108-03: air and soil temperature

  1. year: year (begins 2000) (YYYY)
  2. julianday: day of year (number )
  3. hour: in 24-hour format (hhmm)
  4. daytime: A composite of day (integer) + time (in 1/24ths). The value for the initial measurement year is the actual julian day + hours (in 1/24ths); subsequent years add 365 to day (for 2005), etc. This column is useful for plotting the data. (number )
  5. meanref1: The average internal panel temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  6. meanair1: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  7. meansoil1: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  8. meanair2: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  9. meansoil2: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  10. meanair3: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  11. meansoil3: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  12. maxref1: the maximum internal temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  13. maxair1: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  14. maxsoil1: the maximum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  15. maxair2: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  16. maxsoil2: the maximum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  17. maxair3: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  18. maxsoil3: the maximum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  19. minref1: the minimum internal temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  20. minair1: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  21. minsoil1: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  22. minair2: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  23. minsoil2: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  24. minair3: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  25. minsoil3: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  26. meanref2: The average internal panel temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  27. meanair4: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  28. meansoil4: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  29. meanair5: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  30. meansoil5: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  31. meanair6: the mean hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  32. meansoil6: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  33. maxref2: the maximum internal temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  34. maxair4: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  35. maxsoil4: the mean hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  36. maxair5: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  37. maxsoil5: the maximum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  38. maxair6: the maximum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  39. maxsoil6: the maximum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  40. minref2: the minimum internal temperature (degrees C) of datalogger X. The value for X = 1 for Plots 1-3; X=2 for Plots 4-6. (celsius )
  41. minair4: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  42. minsoil4: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  43. minair5: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  44. minsoil5: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  45. minair6: the minimum hourly air temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
  46. minsoil6: the minimum hourly soil temperature (degrees C; N = 60) in plot Y; Y ranges from 1-6. (celsius )
Home | Research | Information Resources | Publications | Professional & Education Opportunities | Staff & Contacts | Site Map & Search

@2008 The President and Fellows of Harvard College
Faculty of Arts and Sciences of Harvard University
Questions and comments e-mail – hfweb@fas.harvard.edu