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No planet for optimists: Coastal flooding may come sooner than we fear

Systemic Disorder

When it comes to global warming, what else don’t we know? What science does know, and what it can infer from studying archeological records, already makes anybody who thinks the long-term habitability of Earth is more important than short-term profits very worried.

One detail that may have been under-appreciated is meltwater. Melting ice sheets, especially in Greenland and Antarctica, is well understood to raise the sea level. But the effects might not be simply the additional water added to the oceans. In this scenario, the melted freshwater will additionally increase warming, thereby creating a feedback loop that will accelerate the loss of polar ice sheets, thus accelerating the rate of sea-level rise. How fast? Fast enough that the sea level could rise “several meters,” possibly six to nine meters, in 50 to 150 years.

This sobering prediction of what might happen without a drastic reduction in greenhouse-gas emissions is the…

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April 8, 2016 - Posted by | Uncategorized

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