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Climatology

The rather distinctive combination of overall wetness, mild temperatures, wet winters, and dry summers that characterize the climate of the Pacific Northwest strongly influences many ecological and geophysical characteristics of the region. Climate of the Andrews Forest is broadly structured by the mid-latitude intersection of moist, maritime air masses from the Pacific and a series of north-south mountain ranges.

Long-term measurements of air temperature, precipitation, snow, soil temperature, humidity, and other variables have been collected at multiple sites since the 1950s. These data are used in maps, models, and analyses of temporal patterns and trends to characterize and understand the dynamic climate of the Andrews Forest. Major areas of research focus on the interactions of regional climate with topography, cold-air pooling, snowpack accumulation and melt patterns, and temporal trends in air temperature, precipitation, and snow.

Mean annual precipitation at the principal, longest-duration, low-elevation (CS-2, 1952-2006, 500 m) climate station is 2257 mm, with strong temporal variation at the scales of storms, seasons, inter-annual, and long-term trends. The mean daily temperature ranges from 10.5 °C at the lowest elevation (PriMet station at 430 m elevation) and 7.7°C at high elevations (VanMet station at 1294 m), and varies substantially at diel, seasonal, and inter-annual.

Mean annual precipitation map for the Andrews Forest and vicinity based on PRISM 1971-2000.
Mean annual precipitation map for the Andrews Forest and vicinity based on PRISM 1971-2000.
Mean annual precipitation map for the Andrews Forest and vicinity based on PRISM 1971-2000.
Mean annual precipitation map for the Andrews Forest and vicinity based on PRISM 1971-2000.

Research Details

Key Databases

List of all Climatology databases

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