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Sea Level Rise is Coming Faster and Deeper than Anyone Expects

Posted by Green Builder Staff

Mar 23, 2016 5:14:46 AM

James Hansen, the former NASA expert and "father of Climate Change" says we're not taking global warming seriously enough. And we're going to pay.sea-level-rise.jpg

The new report, published in Atmospheric Chemistry and Physics, includes peer review by numerous scientists, with all but one or two in agreement with Hansen's analysis. Here's a brief excerpt:

"Cold meltwater and induced dynamical effects cause ocean surface cooling in the Southern Ocean and North Atlantic, thus increasing Earth's energy imbalance and heat flux into most of the global ocean's surface. Southern Ocean surface cooling, while lower latitudes are warming, increases precipitation on the Southern Ocean, increasing ocean stratification, slowing deepwater formation, and increasing ice sheet mass loss.

These feedbacks make ice sheets in contact with the ocean vulnerable to accelerating disintegration. We hypothesize that ice mass loss from the most vulnerable ice, sufficient to raise sea level several meters, is better approximated as exponential than by a more linear response. Doubling times of 10, 20 or 40 years yield multi-meter sea level rise in about 50, 100 or 200 years."

Hansen adds that ice melting has not yet fully accelerated to the predicted pace, but the timeline is too short to assume it won't. In fact, to the contrary,

The study asserts that "Continued high fossil fuel emissions this century are predicted to yield:

(1) cooling of the Southern Ocean, especially in the Western Hemisphere;

(2) slowing of the Southern Ocean overturning circulation, warming of the ice shelves, and growing ice sheet mass loss;

(3) slowdown and eventual shutdown of the Atlantic overturning circulation with cooling of the North Atlantic region;

(4) increasingly powerful storms; and

(5) nonlinearly growing sea level rise, reaching several meters over a timescale of 50–150 years.

These predictions, especially the cooling in the Southern Ocean and North Atlantic with markedly reduced warming or even cooling in Europe, differ fundamentally from existing climate change assessments. We discuss observations and modeling studies needed to refute or clarify these assertions."

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