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
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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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DEW POINT TEMPERATURE (CS2MET)
Measurement period:: 19980414 - Present
Comments:
Daily Variables:
14 Apr 1998 to Present:
Mean, min, max, daily dewpoint temperature
Time of max, time of min
Fine Resolution Variables:
14 Apr 1998 to Present:
Mean hourly dewpoint temperature
Sensor height: 150 cm (probe 02)
Notes: Dewpoint values are calculated from air temperature
and relative humidity probes.
PROBE 02:
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Measurement period:: 19571001 - Present
Comments:
Daily Variables:
01 Oct 1957 to Present : Daily precipitation
Fine Resolution Variables:
01 Oct 1957 to Present: 5 minute precipitation
Status: This is the longest precipitation record in the Andrews
Forest.
Notes: Data is collected weekly from a standard gage (total precip)
and the adjacent Universal recording gage (chart). Historically,
the charts were hand digitized on a daily basis, and adjusted to
the standard gage total. Subsequently, all charts have been
electronically digitized, and data can be interpolated at a
5 minute resolution. This high resolution data has also been
adjusted to the standard gage total.
The FORKS gage has been used to extend the CS2MET record
back to December, 1951.
PROBE 01:
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Measurement period:: 19580203 - Present
Comments:
Daily Variables:
03 Feb 1958 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) relative humidity
Daily time of max, time of min
Fine Resolution Variables:
14 Apr 1998 to Present:
Mean hourly relative humidity
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. Standard maximum and minimum thermometers on a Townsend
support and a sling psychrometer were used to make weekly checks of the hygrothermograph chart.
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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WATER VAPOR PRESSURE DEFICIT (CS2MET)
Measurement period:: 19980414 - Present
Comments:
Daily Variables:
14 Apr 1998 to Present:
Mean, min, max, daily vapor pressure deficit
Time of max, time of min
Fine Resolution Variables:
14 Apr 1998 to Present:
Mean hourly vapor pressure deficit
Sensor height: 150 cm (probe 02)
Notes: Vapor pessure deficit values are calculated from air temperature
and relative humidity probes every 15 seconds (in millibars).
PROBE 02: