(CNN) — The planet is on track to heat up at a much faster rate than scientists have previously predicted, meaning a key global warming threshold could be breached this decade, according to a new study co-authored by James Hansen — the US scientist widely credited with being the first to publicly sound the alarm...
could be breached this decade, according to a new study co-authored by James Hansen — the US scientist widely credited with being the first to publicly sound the alarm on the climate crisis in the 1980s.
Some other scientists, however, have cast doubt on the paper’s conclusions that climate change is accelerating faster than models predict. In this recent paper, Hansen and his co-authors say the energy imbalance has now increased, in part because of successful efforts to tackle particle air pollution, especially in China and through global restrictions on shipping pollution. While this kind of pollution is a serious health hazard, it also has a cooling effect, as particles reflect sunlight away from the Earth.
“If we’re going to keep sea level close to where it is, we actually have to cool the planet,” said Hansen.. This controversial technology aims to cool temperatures by reflecting sunlight away from the Earth, or allowing more heat to escape into space. That can be done through injecting aerosols into the atmosphere or spraying clouds with salt particles to make them more reflective, for example.
But while science is clear that the rate of global warming is increasing, the idea that it is accelerating beyond what models predict is controversial.
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