A study in Science Advances warns that thawing Arctic permafrost could turn the region from a carbon sink into a carbon source by the 2050s
GS3Economy · S&T · Environment · Security· Climate change & international agreements· Prelims + Mains·
Why in news
A study in Science Advances warns that thawing Arctic permafrost could turn the region from a carbon sink into a carbon source by the 2050s.
Background
Researchers upgraded land surface models to include deep carbon stores in the Arctic. The study indicates that these regions may release more carbon than they absorb, acting as a climate amplifier rather than a helper.
Facts for Prelims
- S&TPermafrost: Ground that remains completely frozen for at least two consecutive years.
- EnvironmentCarbon Sink: A natural reservoir (like forests or permafrost) that absorbs more carbon than it releases.
- FactThe study identifies the 2050s as a critical timeframe for the potential shift in Arctic carbon dynamics.
For Mains
Q. Discuss how the thawing of Arctic permafrost creates a positive feedback loop in global warming and evaluate the necessity of integrating deep carbon dynamics into climate models.
Dimensions to cover in your answer
- Feedback loop mechanism: Release of methane and CO2 from thawing permafrost accelerating global temperature rise.
- Modeling inadequacy: Current climate projections may underestimate Arctic contributions by omitting deep carbon store dynamics.
- Policy urgency: Need for international cooperation on Arctic preservation to mitigate non-anthropogenic greenhouse gas emissions.
Keywords: Positive feedback loop · Carbon sequestration · Permafrost degradation · Climate amplifier · Greenhouse gas emissions
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