Temperatures of springs in the vicinity of Crater Lake, Oregon, in relation to air and ground temperatures by Manuel Nathenson, 1990
Orifice temperatures, specific conductance, and flow have been measured for springs in the vicinity of Crater Lake ranging in elevation from 1266 to 2182 n. Spring temperatures generally decrease with increasing elevation. Air temperatures from weather stations in an area surrounding Crater Lake decrease by 4.6°C lkm of elevation with an intercept of 13.20C at sea level. Ground temperatures obtained by extrapolating temperature/depth data for seven drill holes back to the surface show a variation with elevation generally similar to that found for air temperatures. Comparison of spring and air temperatures versus elevation shows that spring temperatures are generally cooler (1.90+1 0C) than air temperatures except for a group of springs in the eastern Wood River Valley. Some of the springs in the eastern Wood River Valley are as much as 40C higher in temperature than other springs at the same elevation. A chloride inventory of the springs in the eastern Wood River Valley shows an anomalous discharge larger than the inflow to Crater Lake. Though not warm enough to qualify as thermal springs, the springs in the eastern part of the Wood River Valley represent a significant thermal and chemical anomaly.
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