Daily Postcard: Condensation Trails Lace Sky Monday

Daily Postcard: Looking up during the drive down the hill to Santa Fe Monday the sky is laced with condensation trails. Contrails or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several miles above the earth’s surface. Contrails are composed primarily of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that exist at high altitudes allows the formation of the trails. Source: Wikimedia Foundation. Photo by Nancy Ann Hibbs