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Figure 18. Heat and mass transfer from open water on the Chena River, Fairbanks, Alaska, are manifested as a fog plume on a cold (-25°C) morning, 5 March 2002. This reach of the river freezes only during the coldest weather because the water is artificially heated by a power plant located ~1 km upstream (into the page). Photograph by Martin O. Jeffries, Geophysical Institute, University of Alaska Fairbanks.