Thursday, February 18, 2016

Climate Change Effects Accelerating

Sea levels on Earth are rising several times faster than they have in the past 2,800 years and are accelerating because of man-made global warming.

Until the 1880s, the fastest seas rose was about three to 1 to 1.5 inches a century. In the 20th century the world's seas rose 5.5 inches. Since 1993 the rate has soared to a foot per century. Two different studies published Monday said by 2100 that the world's oceans will rise between 11 to 52 inches.
2015 was the hottest year in recorded history and the winter of 2016, for the Arctic, has been the hottest during any period of record keeping and probably the hottest in at least 150,000 years.

Sea ice is retreating. The permafrost is thawing. The glaciers are melting. And the flow of the Jet Stream appears to be weakening.
Before 1700, levels of carbon dioxide were about 280 ppm. Concentrations of carbon dioxide in the atmosphere have reached the 400 ppm theshold.

Methane is one of the most potent greenhouse gases in Earth's atmosphere. It traps 29 times more heat than carbon dioxide. Global methane levels have risen past 1800 parts per billion (ppb), the highest value in at least 800,000 years.
Frozen methane clathrate deposits found at the bottom of seabeds and in permafrost is a natural source of greenhouse gases. Significant amounts of methane is being released into the atmosphere from methane clathrate deposits found in the Arctic.

The warming of methane clathrate releases more methane into the atmosphere creating more global warming. This positive feedback feeds additional methane release. This cycle repeats ... a feedback loop.

Siberian Methane blow hole

No comments:

Post a Comment