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Site description: Clearcut Nov 1986, natural regeneration
Latitude: 44-14-36 Longitude: 122- 8-30 Elevation (MSL): 1018 meters
Aspect: 260 degrees Slope: 12 degrees
Measurement period: 19950823 - Present
Comments:
Daily Variables:
23 Aug 1995 to Present:
Mean, max, min daily (midnight to midnight) temperature
Daily time of max, time of min
Fine Resolution Variables:
23 Aug 1995 to Present:
15 minute mean air temperature
Sensor height: 150 cm (probe 04)
250 cm (probe 03)
350 cm (probe 02)
450 cm (probe 01)
Notes: In August. 1995, the station was established with an array of probes
on a tower at 150,250,350,450 cm heights.
CR10 samples every 15 seconds.
PROBE 01:
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Site description: Old growth opening, tight canopy
Latitude: 44-12-54 Longitude: 122-14-57 Elevation (MSL): 485 meters
Aspect: 355 degrees Slope: 5 degrees
Measurement period: 19580203 - Present
Comments:
Daily Variables:
01 Oct 1949 to 03 Feb1958: Estimated daily min-max record using record at Belknap Springs
03 Feb1958 to 05 Oct 1998: Daily max-min record only - chart record
14 Apr 1998 to present :
Daily max-min record
Mean, max, min daily (midnight to midnight) temperature
Daily time of max, time of min
Fine Resolution Variables:
14 Apr 1998 to Present:
15 minute mean air temperature
Sensor Height: 130 cm - hygrothermograph sensor (probe 01)
150 cm - Campbell thermistor (probe 02)
Notes:
CR500 data logger installed 04 Apr 1998. Data logger samples every 15 seconds.
Chart record is no longer being maintained.
Hygrothermograph chart records were maintained at the Climatic Station
from February 1958 until October 1998.
Chart temperature (daily max and min) is hand-digitized and adjusted to standard
max-min temperatures. Standard maximum and minimum thermometers on a
Townsend support are noted weekly to make adjustments to the chart record.
While it would be possible to digitize the temperature and humidity to
create a high temporal resolution record, this effort has not been attempted.
PROBE 01:
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Site description: Old-growth opening/Road junction
Latitude: 44-15-51 Longitude: 122-10-26 Elevation (MSL): 922 meters
Aspect: 240 degrees Slope: 15 degrees
Measurement period: 19920312 - Present
Comments:
Daily Variables:
12 Mar 1992 to Present:
Mean, max, min daily air temperature
Time of max, time of min
Fine Resolution Variables:
12 Mar 1992 to Present:
Mean hourly air temperature
Sensor height: 480 cm (original height of both sensors)
150, 450 cm (two distinct heights established 931130)
Notes: Two temperature probes are collecting data.
CR10, samples every 10 seconds.
PROBE 01:
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Site description: Maintained clearing
Latitude: 44-12-43 Longitude: 122-15-21 Elevation (MSL): 430 meters
Aspect: - degrees Slope: 0 degrees
Measurement period: 19720510 - Present
Comments:
Daily Variables:
9 May 1972 to 13 Sep 1994:
Mean, max, min daily (midnight to midnight) temperature
Mean, max, min daytime temperature
Mean, max, min nighttime temperature
Time of max, time of min for daily, daytime, nighttime
13 Sep 1994 to Present:
Mean, max, min daily (midnight to midnight) temperature
Daily time of max, time of min
Fine Resolution Variables:
9 May 1972 to 13 Sep 1994:
Mean hourly air temperature
13 Sep 1994 to Present:
15 minute mean air temperature
Sensor height: 9 May 1972 to 23 Jun 2004: 150 cm cotton shelter (probe 05)
13 Sep 1994 to 25 Jun 2004: 150,250,350,450 cm on tower (probes 04, 03, 02, 01, respectively)
26 Jun 2004 to Present: probes at 150 or 450 cm on tower with different shields
Aspirated shield and sensor replaces cotton shelter sensor
Notes: Before 6 Jul 1988, min and max temperatures were hourly averages,
and the hour with the highest (or lowest ) average temperature was time of max (or min).
After 6 Jul 1988, min and max temperatures are instantaneous, and the time of min and max are
accurate.
From 06 Jul 1988 to 30 May 2000, the original probe at 150 cm height located in a Cotton Region
Shelter (probe 5) was used in dew point and vapor pressure deficit calculations.
In Sept 1994, an array of 4 new probes were added to the station tower at 150,250,350,450 cm
heights, in addition to the Cotton Shelter probe.
Beginning on 06 Jul 1998, the 150cm probe on the tower is also used to calculate dew point and
water vapor pressure deficit. On 30 May 2000, use of the 150 cm Cotton Shelter probe to calculate
dew point and water vapor pressure deficit was discontinued and replaced with the use of the 450 cm
probe on the tower.
In June 2000, probes were repositioned to 150 or 450 cm on the tower and a side by side experiment
of various sheilds was installed.
In June 2004, the experiment was deemed finished and the probes were permanently repositioned on
the tower at 150 or 450 cm with the different shields.
Daytime and nighttime calculations were discontinued on 13 Sep 1994.
CR21X samples every 10 seconds beginning 6 Jul 1988.
PROBE 01:
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Site description: Clearcut 1965
Latitude: 44-12-26 Longitude: 122- 7-10 Elevation (MSL): 1294 meters
Aspect: 72 degrees Slope: 13 degrees
Measurement period: 19941010 - Present
Comments:
Daily Variables:
10 Oct 1994 to Present:
Mean, max, min daily (midnight to midnight) temperature
Daily time of max, time of min
Fine Resolution Variables:
10 Oct 1994 to Present:
15 minute mean air temperature
Sensor height: 150,250,350,450 cm
Notes: In October 1994, the station was established with an array of probes
on a tower at 150,250,350,450 cm heights.
CR10 samples every 15 seconds.
PROBE 01:
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Site description: Clearcut 1985?
Latitude: 44-16-18 Longitude: 122- 8-58 Elevation (MSL): 1273 meters
Aspect: 180 degrees Slope: 23 degrees
Measurement period: 19870616 - Present
Comments:
Daily Variables:
16 Jun 1987 to 27 Oct 1990:
Mean sunrise to sunrise temperature
Mean, max, min daytime temperature
Mean, max, min nighttime temperature
Time of max, time of min for daytime, nighttime
27 Oct 1990 to 18 Aug 1993:
Mean, max, min daily (midnight to midnight) temperature
Mean, max, min daytime temperature
Mean, max, min nighttime temperature
Time of max, time of min for daily, daytime, nighttime
18 Aug 1993 to Present:
Mean, max, min daily (midnight to midnight) temperature
Time of max, time of min for daily, daytime, nighttime
Fine Resolution Variables:
25 Oct 1990 to 15 Jul 1994:
Mean hourly air temperature
15 July 1994 to Present:
Mean 15 minute air temperature
Sensor height: 50, 450 cm (original)
150 cm probe added 10 Nov 1993
250, 350 cm probes added 15 Jul 1994
Notes: Before 27 Oct 1990, all measurements were summarized
by daytime and nighttime hours only. After 18 Aug 1993, daytime
and nighttime calculation are discontinued.
The 50 cm height sensor is situated on a separate post
and is frequently covered with snow in the winter months.
By summer 1994, an array of temperature probes are
established on a tower at 150, 250, 350, 450 cm heights.
From 16 Jun 1987 to 17 Aug 1993, mean daily temperatures were
recorded within the canopy of 3 individual trees.
Daytime and nighttime calculations were discontinued on 18 Aug 1993.
CR21X samples every 15 seconds.
PROBE 01: