Oregon Cascade Mountain Environmental Monitoring and Tree Growth Data

1993 to present data from 23 sites along an Oregon Cascade Mountain Crest-to-Coast transect, monitoring climate and forest conditions. The US Environmental Protection Agency Western Ecology Division collected 5-minute measurements of variables like air temperature, rainfall, and soil moisture, with tree growth data added from 1997 onward.

Use Cases

• Model soil moisture dynamics using volumetric soil moisture measurements at multiple depths and rainfall data.
• Analyze photosynthetic activity correlations by linking Photosynthetically Active Radiation (PAR) with tree stem circumference growth data.
• Study microclimate gradients across the transect by comparing air temperature and relative humidity from old-growth forest, clear-cut, and canopy-top sites.
• Investigate snowpack influence using snow depth measurements where applicable alongside soil temperature data.
• Correlate wind patterns and atmospheric conditions using wind speed, wind direction, and barometric pressure records from numerous field sites.

Strengths

• Long-term temporal coverage from 1993 to present, providing over 30 years of environmental data.
• Multi-site spatial coverage across 23 distinct locations along a significant ecological gradient.
• High-frequency 5-minute measurements for core climatic variables.

Limitations

• Start dates for individual monitoring sites varied over several years, creating inconsistent temporal baselines.
• Data is provided as unprocessed raw observations with only minimal quality assurance, requiring user validation.
• Specific sample sizes (rows) and data completeness metrics are unknown.

Provenance

Source

US Environmental Protection Agency - Western Ecology Division (EPA), archived via NOAA NCEI.

Collection Method

In-situ monitoring at field sites measuring climatic variables every 5 minutes, with hourly averages/totals computed. Tree stem circumference measurements taken periodically.

Time Range

Climate data from 1993 to present; tree growth data from 1997 to present.

Freshness

Tree growth data was incrementally updated as recently as March 2019, with climate data potentially ongoing.

Geography

23 locations along an Oregon Cascade Mountain Crest-to-Coast transect, covering old-growth and non old-growth coniferous forests, clear-cuts, and canopy-top sites.