HT002
Stream and air temperature data from stream network in the Andrews Experimental Forest, 1997-2001

CREATOR(S): Sherri L. Johnson

PRINCIPAL INVESTIGATOR(S): Sherri L. Johnson

ORIGINATOR(S): Sherri L. Johnson

DATA SET CONTACT PERSON: Sherri L. Johnson

METADATA CREATION DATE:

7 Dec 2006

MOST RECENT METADATA REVIEW DATE:

17 Dec 2012

KEYWORDS:

Disturbance, air temperature, water temperature, disturbance, aquatic ecosystems

PURPOSE:

To evaluate spatial and temporal variability of stream temperatures throughout the Andrews Experimental Forest

METHODS:

Experimental Design - HT002:

Description: Sensors were placed in streams at similar elevations across the stream network and at stream junctions to examine longitudinal dynamics of stream temperature.

Field Methods - HT002:

Description: Sensors were tied inside 2.5 inch PVC tubes (7 inches long) to allow water flow around sensors but to block direct incoming radiation. Sensor and case were tied to tree on bank and rocks were used to keep case submerged in stream. Sensors were placed near thalweg to measure temperature of main flow. Air temperature sensors were suspended 1.5 m above stream surface, usually by hanging the sensor in a half PVC protective case on a branch.

Instrumentation: Onset Stowaway submersible sensors (+/-0.2oC)

Quality Assurance - HT002:

Description: Sensors were cross calibrated before being deployed, using hot and cold water baths. Sensors that measured temperatures 0.3 C above or below others were not deployed. After downloading, thermographs were examined and temperatures during exposure to air or before and after deployment were deleted from record.

SITE DESCRIPTION:

Sensors placed throughout stream network at Andrews Experimental Forest

TAXONOMIC SYSTEM:

None

GEOGRAPHIC EXTENT:

Andrews Experimental Forest

ELEVATION_MINIMUM (meters):

425

ELEVATION_MAXIMUM (meters):

1250

MEASUREMENT FREQUENCY:

every half hour, primarily during summers

PROGRESS DESCRIPTION:

Complete

UPDATE FREQUENCY DESCRIPTION:

asNeeded

CURRENTNESS REFERENCE:

Ground condition