Rising levels of carbon dioxide in Earth's atmosphere could exacerbate efforts to clean up our increasingly cluttered shell of orbiting space junk.
since reckoning began, a cycle that started around December 2019. The previous cycle, number 24, was unusually subdued even at the peak of solar activity, and this is what enabled Mlynczak and his colleagues to take measurements of atmospheric contraction.
In some lower layers of the atmosphere, CO2 creates a warming effect by absorbing and re-emitting infrared radiation in all directions,Up in the much, much thinner MLT, however, some of the infrared radiation emitted by CO2 escapes into space, effectively carrying away heat and cooling the upper atmosphere. The higher the CO2, the cooler the atmosphere.this cooling is causing the stratosphere to contract. Now we can see it's doing the same to the mesosphere and thermosphere above it too.
Given that the thermosphere extends out to several hundred kilometers, that 342 meters might not seem like a lot. However, aby physicist Ingrid Cnossen of the British Antarctic Survey in the UK showed that thermospheric cooling could result in a 33 percent reduction in atmospheric drag by 2070. As more and more satellites are launched into low-Earth orbit, this is going to become an increasing problem, with no real mitigation measures in sight – either to decrease the number of satellites, or the amount of CO2.
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