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Sea Ice In Arctic and Antarctic Is At Record Low Levels This Year (cnn.com)
dryriver quotes a report from CNN: For what appears to be the first time since scientists began keeping track, sea ice in the Arctic and the Antarctic are at record lows this time of year. "It looks like, since the beginning of October, that for the first time we are seeing both the Arctic and Antarctic sea ice running at record low levels," said Walt Meier, a research scientist with the Cryospheric Sciences Laboratory at NASA's Goddard Space Flight Center, who has tracked sea ice data going back to 1979. While it is too early to know if the recent, rapid decline in Antarctic sea ice is going to be a regular occurrence like in the Arctic, it "certainly puts the kibosh on everyone saying that Antarctica's ice is just going up and up," Meier said. The decline of sea ice has been a key indicator that climate change is happening, but its loss, especially in the Arctic, can mean major changes for your weather, too. The report notes that air temperatures in the Arctic have been exceeding 35 degrees Fahrenheit (20 degrees Celsius) above average, while "sea ice in the northern latitudes is at a lower level than ever observed for this time of the year." October and November is when the Arctic region typically gains ice. This year, air temperatures are staying much warmer and closer to the freezing mark of 32 degrees Fahrenheit. What's more is that water temperatures in the Arctic Ocean are several degrees above average, as a result of having less sea ice.
Trump's going to fix that thin ice, and his supporters are ready to help.
http://www.theatlantic.com/pol...
You are welcome on my lawn.
20 deg C ABOVE AVERAGE, not 20 deg C above ZERO
20C above average in the Arctic for the month of October; not 20C globally. As a result of the reduction of differences in albedo. It's not that extraordinary.
Post may contain irony: discontinue use if experiencing mood swings, nausea or elevated blood pressure.
It does matter, because melting sea ice increases sea levels. It also reduces habitat for animals. And it's evidence that global warming is happening.
3...2...1... cue the haters.
Wouldn't record low levels by definition be the first time we've seen them?
You have that wrong. There have been times when the Arctic sea ice had reach record lows before (obviously not as low as now), and there have been times when the Antarctic sea ice had reached record lows. But for the first time, both of these events have happened at the same time. That is what the original sentence says.
Well, let's see now:
The wildest projections for global temperatures predict a max of 5C global temperature increase
The strongest RCP 8.5 scenario assumes continued and increasing (business-as-usual) emissions reaching 936ppm CO2 by 2100. This is likely to result in 3 to 5 degrees temperature increase by 2100 - but will certainly keep increasing well beyond that, even if we suddenly stopped all our emissions. So no, 5 is not the max. Also, that's an average, and thus specific areas can climb well beyond 5C (see Fig SPM 8 [a]).
never mind that these models have been wrong and every 10 years they have to turn them down to avoid losing all credibility
Citation needed. The first IPCC report in 1990 predicted a temperature increase between 1 and 2 degrees above pre-industrial temperatures (see Figure 8), with a rise rate of 0.1 to 0.2 degrees per decade. Right now we're about 1.2 degrees above pre-industrial temperatures, and rising at 1.7 degrees per decade.
the tropics aren't going to get much hotter due to the effects of evaporation, most of the rise will be seen at the poles and further latitudes
Again, citation needed, because Fig SPM 8 (a) shows pretty clearly that tropical land temperatures can expect 4C to 7C average rises (again under RCP 8.5).
The past is massively important to what we are currently seeing.
But solely for the purpose of identifying past forcings, so that we can evaluate them in the context of today's increases (obviously there is no direct effect). Past changes can (and did) have entirely different causes to current changes. Every natural and cyclical cause that we've identified from the paleontological record has been evaluated in the context of modern warming, and found to be insufficient to cause the observed changes.
If this global warming is due to increased solar flux/frequency shift
It definitely isn't (surely you knew that much?) See IPCC AR5 WGI Chapter 8, particularly section 8.5.
a myriad of other factors not directly or indirectly caused by man
I welcome any suggestions that climatologists may not have considered. But considering you seem to believe they didn't even check solar flux, I'm not hopeful you'll think of anything new.
that argument can be made easily looking at the global temperatures over the past 500k years; hint: palm trees used to grow on Antarctica)
Again I say: so? Why do you think that current climate changes must have the same cause as past changes? Is it not conceivable to you that we could be seeing an entirely different proximate cause? I remind you once again that we've accounted for all known natural forcings, and found them insufficient to cause current observations.
BTW, palm trees grew on Antarctica 52 million years ago (not 500k), and atmospheric CO2 was at least 600ppm. That doesn't bode well for the scope of changes we're likely to see.
all the resources we pour into fighting global warming are 100% wasted
Even if we assume (against all evidence) that current warming is unrelated to human activity, transitioning our energy infrastructure to renewable and/or carbon-neutral sources is hardly wasted. Simply getting off coal will save hundreds of billions in health costs every year, in the US alone. Removing oil-burni
Why would anyone engrave "Elbereth"?
she did beat him.
by over 1.8 million votes so far.
he won because we use an archaic outdated and undemocratic system known at the electoral college.
The guy who said the election was rigged won the presidency with the second-most votes.