By Reid A Bryson
The Macrophysical weather version (MCM) used for the atlas provides an leading edge technique of modeling prior weather that has been carefully confirmed and demonstrated opposed to box facts all over the world. Broad-scale reconstructions of particular occasions some time past offer certain site-specific graphs of precipitation, temperature, evaporation, and snowstorm for greater than seventy five destinations in Oregon.
functions of the version and its implications for human populations in Oregon are explored for every quarter of the kingdom, demonstrating the range of human-climate interactions.
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Extra info for The Archaeoclimatology Atlas of Oregon: The Modeled Distribution in Space and Time of Past Climates
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At approximately 6800 rcybp, Mount Mazama erupted, creating Crater Lake. Mazama was near the end of a global group of volcanic eruptions that had kept the climate semi-glacial. This dramatic event would have been disastrous for people, animals, and vegetation in the immediate and surrounding regions. Many feet of ash covered the ground over large parts of the Northwest, making ash-free areas hugely desirable. It is likely that surviving populations would have headed toward either the Portland Basin or higher elevations, depending on the Historic tribal and EuroAmerican cultures wind direction and the ash fall.
97° Long, 1463 m above sea level Three Lynx, OR: Station No. 1. Modeled precipitation history for Clatskanie, Oregon. 2. Modeled temperature history for Clatskanie, Oregon. 3. Modeled water balance history for Clatskanie, Oregon. 4. Modeled precipitation history for Nehalem, Oregon. 5. Modeled precipitation history for Newport, Oregon. 6. Modeled temperature history for Newport, Oregon. 7. Modeled water balance history for Newport, Oregon. 8. Modeled precipitation history for Seaside, Oregon. 9.
During this later phase (around 1750–800 rcybp), the increased presence of arrow points and the introduction of mule-ear knives may suggest a change in subsistence practices as an adaptation to the changing environment. The Cholick site, near Merrybell, was occupied during this time; it was buried suddenly under a thick layer of silt after a catastrophic flood around 850 rcybp (just before AD 1200) and was not reoccupied (Aikens 1993:172). One final change unique to the area was the sudden emergence of a fired clay, or ceramic, industry.