Harvard Forest

Data Archive

HF282

Microclimate at Harvard Forest HDW Tower since 2014

Related Publications

Data

• hf282-01: hardwood tower data (May 2014 – present) (preview)
• hf282-02: hardwood tower understory data (May 2015-present) (preview)

Overview

• Lead: Aaron Ellison, William Munger
• Investigators: Mark VanScoy
• Contact: Information Manager
• Start date: 2014
• End date: 2024
• Status: ongoing
• Location: Prospect Hill Tract (Harvard Forest)
• Latitude: +42.535076 degrees
• Longitude: -72.174249 degrees
• Elevation: 380 meter
• Datum: WGS84
• Taxa: Acer rubrum (red maple), Quercus rubra (red oak)
• Release date: 2025
• Language: English
• EML file: knb-lter-hfr.282.15
• DOI: digital object identifier
• EDI: data package
• DataONE: data package
• Related links:
• Microclimate at Harvard Forest HEM, LPH and EMS Towers since 2005
• Study type: long-term measurement
• Research topic: forest-atmosphere exchange; large experiments and permanent plot studies
• LTER core area: disturbance patterns
• Keywords: air temperature, climate, meteorology, microclimate, net radiation, photosynthetically active radiation, relative humidity, soil temperature, solar radiation, wind direction, wind speed
• Abstract:

  The HDW (Hardwood) microclimate and walkup tower at Harvard Forest became operational in April 2014. The site was chosen to represent the mixed hardwood forest around the EMS and NEON towers and to provide a platform for research projects without access to those towers. Microclimate data are archived annually and recent data are available upon request. Measured values include air temperature, relative humidity, PAR, net radiation, albedo, wind speed and direction, soil temperature and soil moisture.

• Methods:

  Observation Periods

  Observation periods are 30-minute with the time stamp representing the end of the sampling interval. All times are Eastern Standard Time (UTC-5).

  Microclimate Sensors

  1. Photosynthetically active radiation (PAR): LI-190 SA quantum sensors--Licor.

  2. Co-located air temperature and relative humidity sensors: Campbell HMP 45C (replaced August 2014); Campbell CS215 (August 2014 – present).

  3. Aspirated Radiation shield: Model 43502 RM Young (2014-present).

  4. Radiation-shielded and ventilated precision air temperature sensors (2010-2014): Met-One, Inc., Grants Pass, OR, USA).

  5. Soil moisture sensors: Campbell CS-616.

  6. Net radiometer: Kippen Zonen, NR-Lite (2005-2014).

  7. Four component net radiometer: Huskeflux NR01 (2014-present).

  8. Wind anemometer: RM Young Wind Monitor 05103 (2014-present).

  9. Understory Air and soil temperature thermistors: homemade similar to T109 thermistor from Campbell Scientific.

  Measurement Locations

  All tower meteorological measurements are taken on the south side of the tower. The four component net radiometer is located at 28 meters. A profile of PAR, temperature and relative humidity are located at 28 meters, 18 meters, and 9 meters. Wind speed and direction are measured at 30 meters.

  There are two under story measuring site below the tower. US1 is located 10 meter south of the tower. US2 is located 30 meters southwest of the tower. At each site PAR and air temperature are measured at 1 meter. Soil water content is an integrated measurement of the top 10 cm of soil.

• Organization: Harvard Forest. 324 North Main Street, Petersham, MA 01366, USA. Phone (978) 724-3302. Fax (978) 724-3595.

• Project: The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts. (ROR).

• Funding: National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210.

• Use: This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.

• License: Creative Commons Zero v1.0 Universal (CC0-1.0)

• Citation: Ellison A, Munger W. 2025. Microclimate at Harvard Forest HDW Tower since 2014. Harvard Forest Data Archive: HF282 (v.15). Environmental Data Initiative: https://doi.org/10.6073/pasta/28a6484059ff4619a24d064483bfd23d.

Detailed Metadata

hf282-01: hardwood tower data (May 2014 – present)

1. datetime: date and time stamp
2. dec_date: decimal date (unit: nominalDay / missing value: NA)
3. parac_up: photosynthetically active radiation measured above the canopy at 28 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
4. parac_down: photosynthetically active radiation measured above the canopy at 28 m height, down facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
5. parmid: photosynthetically active radiation measured mid canopy at 18 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
6. parlow: photosynthetically active radiation measured at lower canopy at 9 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
7. rn: net radiation measured above the canopy at 28 m (unit: wattPerMeterSquared / missing value: NA)
8. albedo: albedo at 28 m (unit: dimensionless / missing value: NA)
9. rs_down: short wave radiation at 28 m, down welling (unit: wattPerMeterSquared / missing value: NA)
10. rs_up: short wave radiation at 28 m, up welling (unit: wattPerMeterSquared / missing value: NA)
11. rl_down: long wave radiation at 28 m, down welling (unit: wattPerMeterSquared / missing value: NA)
12. rl_up: long wave radiation at 28 m, up welling (unit: wattPerMeterSquared / missing value: NA)
13. tnr01: temp Kelvin at 28 m, 4 channel net radiometer (unit: kelvin / missing value: NA)
14. airt_ac: air temperature measured above the canopy at 28 m height (unit: celsius / missing value: NA)
15. rh_ac: relative humidity measured above the canopy at 28 m height (unit: dimensionless / missing value: NA)
16. airt_mid: air temperature measured mid canopy at 18 m height (unit: celsius / missing value: NA)
17. rh_mid: relative humidity measured mid canopy at 18 m height (unit: dimensionless / missing value: NA)
18. airt_low: air temperature measured at lower canopy at 9 m height (unit: celsius / missing value: NA)
19. rh_low: relative humidity measured at lower canopy at 9 m height (unit: dimensionless / missing value: NA)
20. ws: wind speed at 28 m height (unit: metersPerSecond / missing value: NA)
21. wsres: horizontal resultant vector wind speed at 28 m height (unit: metersPerSecond / missing value: NA)
22. winddir: wind direction at 28 m height (unit: degree / missing value: NA)
23. winddir_sd1: wind direction standard deviation at 28 m height (unit: degree / missing value: NA)
24. parac_up_max: maximum photosynthetically active radiation measured above the canopy at 28 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
25. parac_down_max: maximum photosynthetically active radiation measured above the canopy at 28 m height, down facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
26. parmid_max: maximum photosynthetically active radiation measured mid canopy at 18 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
27. parlow_max: maximum photosynthetically active radiation measured at lower canopy at 9 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
28. rn_max: maximum net radiation at 28 m height (unit: wattPerMeterSquared / missing value: NA)
29. albedo_max: maximum albedo at 28 m (unit: dimensionless / missing value: NA)
30. rs_down_max: maximum short wave radiation, down welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
31. rs_up_max: maximum short wave radiation, up welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
32. rl_down_max: maximum long wave radiation, down welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
33. rl_up_max: maximum long wave radiation, up welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
34. airt_ac_max: maximum above canopy temperature at 28 m height (unit: celsius / missing value: NA)
35. rh_ac_max: maximum above canopy relative humidity at 28 m height (unit: dimensionless / missing value: NA)
36. airt_mid_max: maximum mid canopy temperature at 18 m height (unit: celsius / missing value: NA)
37. rh_mid_max: maximum mid canopy relative humidity at 18 m height (unit: dimensionless / missing value: NA)
38. airt_low_max: maximum lower canopy temperature at 9 m height (unit: celsius / missing value: NA)
39. rh_low_max: maximum lower canopy relative humidity at 9 m height (unit: dimensionless / missing value: NA)
40. ws_max: maximum wind speed at 28 m height (unit: metersPerSecond / missing value: NA)
41. parac_up_min: minimum photosynthetically active radiation measured above the canopy at 28 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
42. parac_down_min: minimum photosynthetically active radiation measured above the canopy at 28 m height, down facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
43. parmid_min: minimum photosynthetically active radiation measured mid canopy at 18 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
44. parlow_min: minimum photosynthetically active radiation measured at lower canopy at 9 m height, up facing (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
45. rn_min: minimum net radiation measured at 28 m height (unit: wattPerMeterSquared / missing value: NA)
46. albedo_min: minimum albedo (unit: dimensionless / missing value: NA)
47. rs_down_min: minimum short wave radiation, down welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
48. rs_up_min: minimum short wave radiation, up welling, at 28 m height (unit: wattPerMeterSquared / missing value: NA)
49. rl_down_min: minimum long wave radiation, down welling at 28 m height (unit: wattPerMeterSquared / missing value: NA)
50. rl_up_min: minimum long wave radiation, up welling at 28 m height (unit: wattPerMeterSquared / missing value: NA)
51. airt_ac_min: minimum above canopy temperature at 28 m height (unit: celsius / missing value: NA)
52. rh_ac_min: minimum above canopy relative humidity at 28 m height (unit: dimensionless / missing value: NA)
53. airt_mid_min: minimum mid canopy temperature at 18 m height (unit: celsius / missing value: NA)
54. rh_mid_min: minimum mid canopy relative humidity at 18 m height (unit: dimensionless / missing value: NA)
55. airt_low_min: minimum lower canopy temperature at 9 m height (unit: celsius / missing value: NA)
56. rh_low_min: minimum lower canopy relative humidity at 9 m height (unit: dimensionless / missing value: NA)

hf282-02: hardwood tower understory data (May 2015-present)

1. datetime: date and time stamp
2. dec_date: decimal date (unit: nominalDay / missing value: NA)
3. parus1: photosynthetically active radiation, understory site 1, 10m south of tower, at 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
4. parus2: photosynthetically active radiation, understory site 2, 30m southwest of tower, at 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
5. airt_us1: understory air temperature site 1, 10m south of tower, at 1 m height (unit: celsius / missing value: NA)
6. airt_us2: understory air temperature site 2, 30m southwest of tower, at 1 m height (unit: celsius / missing value: NA)
7. soilt_us1: soil temperature site 1, 10m south of tower (unit: celsius / missing value: NA)
8. soilt_us2: soil temperature site 2, 30m southwest of tower (unit: celsius / missing value: NA)
9. vwc1: soil volumetric water content site 1, 10m south of tower (unit: dimensionless / missing value: NA)
10. vwc2: soil volumetric water content site 2, 30m southwest of tower (unit: dimensionless / missing value: NA)
11. parus1_max: maximum photosynthetically active radiation understory site 1, 10m south of tower, 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
12. parus2_max: maximum photosynthetically active radiation understory site 2, 30m southwest of tower, 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
13. airt_us1_max: maximum understory air temperature site 1, 10m south of tower, at 1 m height (unit: celsius / missing value: NA)
14. airt_us2_max: maximum understory air temperature site 2, 30m southwest of tower, at 1 m height (unit: celsius / missing value: NA)
15. soilt_us1_max: maximum soil temperature site 1, 10m south of tower (unit: celsius / missing value: NA)
16. soilt_us2_max: mximum soil temperature site 2, 30m southwest of tower (unit: celsius / missing value: NA)
17. vwc1_max: maximum soil volumetric water content site 1, 10m south of tower (unit: dimensionless / missing value: NA)
18. vwc2_max: maximum soil volumetric water content site 2, 30m southwest of tower (unit: dimensionless / missing value: NA)
19. parus1_min: minimum photosynthetically active radiation understory site 1, 10m south of tower, at 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
20. parus2_min: minimum photosynthetically active radiation understory site 2, 30m southwest of tower, at 1 m height (unit: micromolePerMeterSquaredPerSecond / missing value: NA)
21. airt_us1_min: minimum understory air temperature site 1, 10m south of tower, at 1 m height (unit: celsius / missing value: NA)
22. airt_us2_min: minimum understory air temperature site 2, 30m southwest of tower, at 1 m height (unit: celsius / missing value: NA)
23. soilt_us1_min: minimum soil temperature site 1, 10m south of tower (unit: celsius / missing value: NA)
24. soilt_us2_min: minimum soil temperature site 2, 30m southwest of tower (unit: celsius / missing value: NA)
25. vwc1_min: minimum soil volumetric water content site 1, 10m south of tower (unit: dimensionless / missing value: NA)
26. vwc2_min: minimum soil volumetric water content site 2, 30m southwest of tower (unit: dimensionless / missing value: NA)