Monday, December 8, 2014

WMO Warns Lima Delegates 2014 May Be Hottest Year | Climate Central

WMO Warns Lima Delegates, 2014 ... Hottest Year in History!:-( | Climate Central:

Ouch, this is really really ugly, the data related to 2014 as the hottest year in modern history.

Double to the angst is the melt-off of the Antarctic.

Here's a discussion about both.

The period between April and September, according to NASA GISS was the hottest in 120 years. Most (?all?) of the months since April will set all time heat highs, as well.

Fortunately an El Nino weather pattern did not develop this year or the year-end temperatures would be even higher.

The consistent march of the oceans to higher temperature is doubly scary. It should take years, if not decades for rising temperatures to make a dent in the ocean temperatures. If the oceans are, on average 2 miles deep, it should take a long time for warming at the surface to permeate down to the depths.

Thermal expansion is scary. A 1 degree increase in surface temperatures, on average, should eventually result in about 2 feet of rise at the ocean surface due to thermal expansion as water gets warmer. This may take many years, but the increase is "baked in" if surface temperatures stay the same (or continue rising).

But doubly worrisome are the ice sheets in Antarctica (and Greenland and Iceland) which are ice sheets on top of land. The Arctic in the north is generally ice on top of water, so when the ice melts up there, as it is rapidly doing, it does not affect ocean levels (directly).

A study accepted for publication in the journal Geophysical Research Letters found that the Amundsen Sea Embayment in West Antarctica is melting quickly and at an increasing rate. They found that the ice loss was equivalent to the volume of Mt Everest every 2 years.

The accepted draft of the article is here: paper...

Too bad. After seeing some encouraging studies that suggested that there might be a bit of a hiatus to the march of global warming, some of the more recent measures are not so good.


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