A new study published in Nature Sustainability warns that global warming could threaten the future use of satellites, significantly reducing the number of spacecraft that can safely orbit Earth. The study’s author, William Parker, a PhD candidate at MIT, says climate change is causing space debris to linger above the planet for longer periods, leaving less space for functioning satellites. Rising greenhouse gas emissions are also creating a long-term contraction in the upper atmosphere, making it harder for satellites to re-enter the lower orbit.
The persistent hazard of space junk poses a threat to every active satellite, and there are currently “tons of debris” in Earth’s low orbit. The number of satellites that can safely orbit Earth could be reduced by up to 66% by the end of the century under a high emissions scenario. To mitigate this problem, entities operating in space may need to conduct active debris removal, which can cost tens of millions of dollars.
Reducing greenhouse gas emissions is crucial to prevent further complications with space operations and protect the long-term sustainability of satellite use. The study’s findings highlight the importance of addressing climate change to ensure the continued operation of satellites and their ability to support critical Earth observations and other applications.
Source: https://abcnews.go.com/US/global-warming-threaten-satellites-new-study/story?id=119551716