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Warmer air rising up from the bottom of the canyon, meets cooler, moister air and creates the clouds you see in this video. NPS Video by M. Quinn Winter conditions on the South Rim can be extreme. Be prepared for snow, icy roads and trails, and possible road closures. Winter weather typically begins by November and becomes well entrenched by December and January, with frequent light to moderate snows and increasingly colder weather. Low temperatures are generally in the teens along the Rim;...
Topics: Flickr, video, grandcanyonnationalpark, winter, inversion, cloudinversion, clouds, weather,...
A group of ponderosa pine killed by dwarf mistletoe. South Rim of the Grand Canyon, Arizona. Photo by: Frank G. Hawksworth Date: 1965 Credit: USDA Forest Service, Region 6, State and Private : Forestry, Forest Health Protection. Source: FHP digital collection; Regional Office; Portland, Oregon. For more see: Hawksworth, F.G. 1961. Dwarfmistletoe of ponderosa pine in the Southwest. USDA Forest Service. Technical Bulletin Number 1246. naldc.nal.usda.gov/download/CAT87201189/PDF Image provided by...
Topics: grandcanyon, foresthealthprotection, southrim, usda, stateandprivateforestry, frankghawksworth,...
Effects of dwarf mistletoe in a heavily infested ponderosa pine stand. This image (USFS photo number 493869) is a repeat of USFS 493868 which was taken 5 years earlier. Four trees averaging about 12 inches in diameter were killed by dwarf mistletoe during this five year period. South Rim of the Grand Canyon, Arizona. Photo by: Frank G. Hawksworth Date: May 1955 Credit: USDA Forest Service, Region 6, State and Private : Forestry, Forest Health Protection. Source: FHP digital collection; Regional...
Topics: grandcanyon, foresthealthprotection, 493868, usda, stateandprivateforestry, 493869, fghawksworth,...
L-R: Forest Pathologists Helen Maffei (left), Brian Geils, and Kristen Chadwick relocating permanent plot photo points on the South Rim of the Grand Canyon, Arizona. Additional information from Helen Maffei: "These photo points spanned 55 years at the time. The photo points were subsequently re-taken by Tom Iraci." Photo by: Unknown; courtesy of: Paul Deignan Date: April 7, 2005 Photo credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection, Central...
Topics: r6, usda, stateandprivateforestry, foresthealth, region6, forestpathologist, photopoint,...
