Relative Humidity Sites

Site Maps

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CENMET (Relative Humidity)

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) relative humidity
Time of max, time of min for daily relative humidity

Fine Resolution Variables:
23 Aug 1995 to Present:
Hourly relative humidity

Sensor height: 150 cm (probe 04)
450 cm (probe 01)

Notes: CR10 samples every 15 seconds.

PROBE 01:

PROBE 04:

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CS2MET (Relative Humidity)

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:
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:

PROBE 02:

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H15MET (Relative Humidity)

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 relative humidity
Time of max, time of min

Fine Resolution Variables:
12 Mar 1992 to Present:
Hourly relative humidity

Sensor height: 480 cm (original height of both sensors)
150, 450 cm (two distinct heights established 30 Nov 1993)

Notes: Two relative humidity sensors are collecting data.
CR10 samples every 10 seconds.

PROBE 01:

PROBE 02:

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PRIMET (Relative Humidity)

Site description: Maintained clearing

Latitude: 44-12-43 Longitude: 122-15-21 Elevation (MSL): 430 meters

Aspect: - degrees Slope: 0 degrees

Measurement period: 19880706 - Present

Comments:

Daily Variables:
06 Jul 1988 to 13 Sep 1994:
Mean, max, min daily (midnight to midnight) relative humidity
Mean, max, min daytime relative humidity
Mean, max, min nighttime relative humidity
Time of max, time of min for daily, daytime, nighttime

13 Sep 1994 to Present:
Mean, max, min daily (midnight to midnight) relative humidity
Daily time of max, time of min

Fine Resolution Variables:
06 Jul 1988 to Present:
Hourly relative humidity

Sensor height: 06 Jul 1988 to 30 May 2000 : 150 cm cotton shelter (probe 05)
04 Jun 1998 to present: 150 cm on tower (probe 04)
30 May 2000 to present: 450 cm on tower (probe 01)

Notes: CR21X, Samples every 15 seconds. After 13 Sep 1994 daytime
and nighttime calculations were discontinued.
Both probes are used to calculate vapor pressure deficit.

PROBE 01:

PROBE 04:

PROBE 05:

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UPLMET (Relative Humidity)

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) relative humidity
Time of max, time of min for daily relative humidity

Fine Resolution Variables:
10 Oct 1994 to Present:
Hourly relative humidity

Sensor height: 450 cm (probe 01) installed on 10 Oct 1994
150 cm (probe 04) installed on 29 Aug 1996

Notes: CR10 samples every 15 seconds.

PROBE 01:

PROBE 04:

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VANMET (Relative Humidity)

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, max, min daytime relative humidity
Mean, max, min nighttime relative humidity
Time of max, time of min for daytime, nighttime
27 Oct 1990 to 16 Aug 1993:
Mean, max, min daily (midnight to midnight) relative humidity
Mean, max, min daytime relative humidity
Mean, max, min nighttime relative humidity
Time of max, time of min for daily, daytime, nighttime
16 Aug 1993 to Present:
Mean, max, min daily (midnight to midnight) relative humidity
Time of max, time of min for daily relative humidity

Fine Resolution Variables:
25 Oct 1990 to Present:
Hourly relative humidity

Sensor height: 450 cm, 150 cm (summer of 1994)
Permanent 150 cm probe installed 08 Aug 1996

Notes: Before 27 Oct 1990, all measurements were summarized
by daytime and nighttime hours only. After 16 Aug 1993, daytime
and nighttime calculation were discontinued.
Data logger samples every 15 seconds.

PROBE 01:

PROBE 04: