Smoke from wildfires has cooling effect on water temperatures | 10/11/2018 | Staff
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Smoke generated by wildfires can cool river and stream water temperatures by reducing solar radiation and cooling air temperatures, according to a new study in California's Klamath River Basin.

A new study published in Water Resources Research, a journal of the American Geophysical Union, suggests smoke-induced cooling has the potential to benefit aquatic species that require cool water to survive because high summer water temperatures are a major factor contributing to population declines, and wildfires are more likely to occur during the warmest and driest time of year.

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Native American tribes and other entities measuring river water temperatures in the Klamath Basin had previously noticed drops in river temperatures during periods of heavy smoke, but this is the first study to demonstrate this phenomenon with rigorous statistical analysis of long-term datasets.

Frank Lake, a research ecologist with the U.S. Forest Service's Pacific Southwest Research Station in Albany, California and co-author of the study says historical wildfire patterns are quite different than those of present day, yet likely share similarities in regard to this new concept.

Fire - Suppression - Wildfires - Western - United

"Prior to modern fire suppression, wildfires burned extensively throughout much of the Western United States, and smoke from these fires may have naturally cooled water temperatures during the summer when temperatures are hottest," Lake said.

Bill Tripp, deputy director of the Karuk Tribe Department of Natural Resources in Orleans, California, who was not connected to the new study, says this research provides a great example of how traditional ecological knowledge is used...
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