Site Meteorological Measurements

REFERENCE STAND #89 (RS89__)

Site description: WS#10, overgrown young stand, was RS#9; Habitat type Tshe/Acci/Pomu

Latitude: 44-13- 1 Longitude: 122-15-39 Elevation (MSL): 470 meters

Aspect: 315 degrees Slope: 37 degrees

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AIR TEMPERATURE (RS89__)

Measurement period:: 19750919 - Present

Comments:

Daily Variables:
19 Sep 1975 to 22 Jan 1981:
Mean sunrise to sunrise temperature
Mean, max daytime temperature
Mean, min nighttime temperature
22 Jan 1981 to 06 Jan 1987:
Mean, max, min sunrise to sunrise temperature
Mean daytime, mean nighttime temperature
06 Jan 1987 to 19 May 1998:
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
19 May 1998 to Present:
Mean, max, min daily (midnight to midnight) air temperature
Daily time of max, time of min

Fine Resolution Variables:
19 May 1998 to Present:
Mean hourly air temperature

Sensor height: 100 cm
85 cm (repositioned 01 Oct 1991)
285 cm (repositioned 19 May 1998)

Notes: RS89 was RS09 before logging.
Changes in measured temperature parameters were due to changes in
the digitizing program used to process chart data. All daily summaries
are based on a sunrise to sunrise day before 06 Jan 1987.
Beginning 06 Jan 1987, a true daily summary is available due to the use
of a revised digitizing program. The revised program produces output
similar to the CR10 dataloggers used for thermographs.
Daytime/nighttime calculation discontinued 19 May 1998 when CR500
data logger installed.

PROBE 01:

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RELATIVE HUMIDITY (RS89__)

Measurement period:: 20040719 - Present

Comments:

Daily Variables:
21 Jul 2004 to Present:
Mean, max, min daily relative humidity
Time of max, time of min

Fine Resolution Variables:
21 Jul 2004 to Present:
Hourly relative humidity

Sensor height: 285 cm

Notes: RS89 was RS09 before logging.
CR10 samples every 10 seconds.

PROBE 01:

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SOIL TEMPERATURE (RS89__)

Measurement period:: 19750919 - Present

Comments:

Daily Variables:
19 Sep 1975 to 06 Jan 1987:
Mean sunrise to sunrise temperature only
06 Jan 1987 to 19 May 1998:
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
19 May 1998 to Present:
Mean, max, min daily (midnight to midnight) soil temperature
Daily time of max, time of min

Fine Resolution Variables:
19 May 1998 to Present:
Mean six-hourly soil temperature

Sensor depth: 20 cm
10, 20, 30 cm (after 19 May 1998)

Notes: Soil temperature was digitized on a sunrise to sunrise basis.
After 06 Jan 1987, a true daily summary is available due to the use
of a revised digitizing program. The revised program produces
output similar to the CR10 dataloggers used for thermographs.
RS89 was RS09 before logging.
CR500 data logger installed and daytime/nighttime calculation
discontinued 19 May 1998.

PROBE 01:

PROBE 02:

PROBE 03: