Site Meteorological Measurements

REFERENCE STAND #20 (RS20__)

Site description: Midslope; Habitat type Psme/Hodi

Map elevation: 683 meters

(No GPS data for this point.)

Aspect: 180 degrees Slope: 34 degrees

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AIR TEMPERATURE (RS20__)

Measurement period:: 19790101 - Present

Comments:

Daily Variables:
01 Jan 1979 to 21 Jan 1981:
Mean sunrise to sunrise temperature
Mean, max daytime temperature
Mean, min nighttime temperature
21 Jan 1981 to 22 Apr 1987:
Mean, max, min sunrise to sunrise temperature
Mean daytime, mean nighttime temperature
22 Apr 1987 to 08 Apr 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
08 Apr 1998 to Present:
Mean, max, min daily (midnight to midnight) air temperature
Daily time of max, time of min

Fine Resolution Variables:
08 Apr 1998 to Present:
Mean hourly air temperature

Sensor height: 100 cm
220 cm (repositioned 01 Oct 1991)

Notes: 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 22 Apr 1987.
Beginning 22 Apr 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.
On 10 Jul 1987, a CR10 datalogger is installed. The Partlow chart
recorder was maintained until 31 May 1990 as a backup, and then removed.
Daytime/nighttime calculation discontinued 08 April 1998.

PROBE 01:

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SOIL TEMPERATURE (RS20__)

Measurement period:: 19790101 - Present

Comments:

Daily Variables:
01 Jan 1979 to 22 Apr 1987:
Mean sunrise to sunrise temperature only
22 Apr 1987 to 08 Apr 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
08 Apr 1998 Present:
Mean, max, min daily (midnight to midnight) soil temperature
Daily time of max, time of min

Fine Resolution Variables:
08 Apr 1998 Present:
Mean six-hourly soil temperature

Sensor depth: 20 cm
10, 20, 30 cm (after 10 Jul 1987)

Notes: Soil temperature was digitized on a sunrise to sunrise basis.
After 22 Apr 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.
On 10 Jul 1987, a CR10 datalogger is installed, and additional soil
depths at 10 and 30 cm are added. The Partlow chart recorder
was maintained until 31 May 1990 as a backup, and then removed.

PROBE 01:

PROBE 02:

PROBE 03: