Warming That Fuels More Warming? Hidden Emissions Missing from Climate Models
Published
Research suggesting that global warming may progress not only because of greenhouse gases emitted by humans, but also because of warming itself, is attracting attention. According to a report by MIT Technology Review, emissions triggered by warming alone could raise global temperatures by 0.2 to 0.4°C by the end of this century.
For example, when permafrost in the Arctic and other regions thaws, carbon dioxide and methane that had been trapped there are released into the atmosphere. Also, as temperatures rise, wildfires become larger and more frequent, and when forests burn, large amounts of carbon are released into the air. These phenomena are called "feedbacks," as they further intensify global warming.
The problem is that many current climate models do not adequately incorporate emissions caused by these feedbacks. Because climate models are used to predict future temperatures and precipitation, if this factor is not included, actual warming could progress more than predicted. Extreme heat and wildfires are occurring one after another in various parts of the world, and the effects of climate change are becoming an increasingly personal issue. However, further research is still needed to determine the extent of these effects.
To prevent this chain of warming, efforts to reduce greenhouse gas emissions caused by humans are thought to become even more important than before. It can be said that this study offers a new perspective in considering measures against climate change.
Sources: MITテクノロジーレビュー
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