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The strange clouds shining in the night sky and becoming more and more common can be related to the excess methane we are pumping into the atmosphere, as the new study points out.
Although beautiful to photograph, there is a problem. The bad news is that methane is a greenhouse gas that contributes to global warming. But the good news is that more methane means that more and more of us will have a chance to see these staggering, nocturnal or noctilucent images, according to the study, published this week in the journal Geophysical Research Letters.
Noctilucent clouds form around the poles during the summer months, when ice crystallizes around disintegrating meteorite fragments, volcanic dust and even rocket plumes 50 miles above sea level. surface, according to NASA. Here on the ground, we can see these clouds when the sun goes down below the horizon and illuminates them. The first time people reported the perception of noctilucent clouds was in 1880 after the mbadive eruption of Krakatau, a volcano in Indonesia. At that time, noctilucent clouds were observed a few times a century. Now, it is possible to see one or more noctilucent clouds at each station, says the study.
It's probably because they're getting brighter. According to new computer simulations, increasing levels of methane, a greenhouse gas, make these clouds brighter. Over time, the methane in the atmosphere breaks down into carbon dioxide and water. This water vapor is responsible for the bleaching of noctilucent clouds, says the new study. More water vapor means more growth of ice crystals, which means brighter clouds.
Consider a consolation prize for the slow destruction of our climate, but the clouds are really beautiful, especially for the photographs.
Nocturnal clouds shine on Antarctica on these images collected by the NASA ice plane on the Mesosphere spacecraft in 2016.
Photographer Amelia Krales teaches how Take a good photo, in fact the tip is useful for any type of night photo. First, you need to get to the right place: you have the best chance of locating the noctilucent clouds at the naked eye at latitudes of 55 degrees north to 61 degrees north, says the lorries. study
Then set aperture in the right wide lens – an aperture of about 1.4 – to allow more light to reach the camera sensor and slow down the speed of the camera. shutter, which is measured in fractions of seconds. "When you want to get as much light as you can, you can have a shutter speed of less than 1/30, which is where the tripod is," says Krales. Otherwise, an unstable jack on the camera may result in blurry exposure. You can also increase ISO – which increases the sensitivity of the sensor to light and it is better to write raw files instead of compressed formats because the raw files store the most digital information and retain the nuances of tones and tones. colors.
Krales
Watch a video made by NASA capturing these beautiful clouds:
Incredible, do not you think?
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