Could these strange blue clouds be a sign of global warming?

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Could These Strange Blue Clouds Be a Sign of Global Warming?

Blue clouds are becoming more common in certain areas, and scientists are wondering if it could be a sign of global warming. Noctilucent clouds or NLCs, which glow blue, have been appearing at more southerly latitudes, with sightings as far down as Northern California.

Computer models suggest that as greenhouses gasses warm the lower levels in the atmosphere, the upper layers cool. That scenario is conducive to these high clouds forming. Tony Phillips of SpaceWeather.com adds, "Methane drifting to the top of the atmosphere produces water, which is available for the formation of NLCs."

More possible proof was raised by a University of Colorado professor who notes that the first clouds were seen around the time of the Industrial Revolution when more gases were being produced. However, scientists remain unsure about the relationship between noctilucent clouds and global warming and believe more research needs to be done. First spotted in 1885, two years after a super volcano eruption, they can be seen in the summer months when the sky is otherwise clear.

Weird weather trends we've seen this summer:
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Weird summer weather throughout U.S.
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Could these strange blue clouds be a sign of global warming?
LAKE MEAD NATIONAL RECREATION AREA, NV - AUGUST 03: The ruins of the Hannig Ice Cream Parlor are shown in the ghost town of St. Thomas on August 3, 2015 in the Lake Mead National Recreation Area, Nevada. The town was founded in 1865 by Mormon pioneers at the site where the Muddy River flowed into the Colorado River and at one point had about 500 settlers. The town was abandoned in 1938 after the construction of the Hoover Dam caused the Colorado River to rise. The area was once submerged in 60 feet of water but became entirely exposed to the air as a severe drought in the Western United States over the last 15 years has caused Lake Mead to drop to historic low levels. (Photo by Ethan Miller/Getty Images)
UNITED STATES - JULY 30: A severe thunderstorm passes over the U.S. Capitol on Thursday, July 30, 2015. (Photo By Bill Clark/CQ Roll Call)
NEW YORK, NY - AUGUST 17: People enjoy a hot afternoon at the Astoria Pool in the borough of Queens on August 17, 2015 in New York City. The main pool, the biggest in New York City and administered by the New York City Department of Parks and Recreation, sees over 3,000 people on a typical summer weekday. New York city is in the middle of a heat wave, with temperatures in the high nineties and with a heat factor making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
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