Monthly mean global surface temperature since 1996 (source; my annotation; click to enlarge)
by Gaius Publius
I know most of us in the current generation of Americans expect the climate to deteriorate, from a livability standpoint, at some reasonably slow rate over the next century or more. In other words, most people in the U.S. now feel some urgency about climate change (that ship, at least, has left dock), but not so much urgency that they're willing to
mobilize the country's resources against it.
Which exposes, I think, an argument that comes from a position of privilege, perhaps the ultimate privilege — the
privilege of age. The privilege, in other words, of expecting to die before it's really "my" problem after all. Which allows us, at least in the United States, the option of comfortably keeping our oil- and gas-fired iPhone and happy-motoring lifestyles while pretending there's still time to fix things.
Stop global warming at 2°C above pre-industrial? No problem. That won't happen
until the 2030s at the earliest. Stop at 1½°C, as the Paris Climate Conference "wants" to do? No problem. We're not there yet.
What we're really pretending, of course, is that we're not cannibalizing the lives of our grandchildren in order not to be put out too much. But what if we really are cannibalizing our own lives as well? What if the tidal wave will hit before
we can leave the beach? Oops.
February 2016 Was the Warmest Month in Recorded History
Scientists are noticing that we're piling record-setting month on top of record-setting month, record year on top of record year, in an explosion of warming that seems to be accelerating.
The
Guardian (my emphasis throughout):
February was the warmest month in recorded history, climate experts say
From Alaska to Australia, an unprecedented heating of planet Earth is underway with rising temperatures across huge swathes of land mass and oceans
Our planet went through a dramatic change last month. Climate experts revealed that February was the warmest month in recorded history, surpassing the previous global monthly record – set in December. An unprecedented heating of our world is now under way.
With the current El Niño weather event only now beginning to tail off, meteorologists believe that this year is destined to be the hottest on record, warmer even than 2015.
Nor is this jump in global temperature a freak triggered by an unusually severe El Niño, say researchers. “It is the opposite,” said Professor David Vaughan of the British Antarctic Survey. “This is a catch-up of a recent hiatus that has occurred in rising global temperatures. We are returning to normality: rising temperatures. This is an absolute warning of the dangers that lie ahead.”
Those dangers are now being dramatically demonstrated around the globe: drought in the Marshall Islands in the Pacific, which has forced the government there to issue a state of emergency warning; France observed its warmest winter since records began; while the sea ice that has formed in the Arctic this winter is about a million square kilometres less than its average for this time of year. ...
Which leads to this comment about the Paris "aspirational" target of keeping global warming
below 1.5°C above pre-industrial levels. We've passed that target, at least for now:
Last month’s jump in global temperatures represents an increase of 1.35C above the average temperature level for the period 1951-80 and 1.63C above pre-industrial levels, taking global temperature for the month above the 1.5C rise that last year’s Paris climate was supposed to prevent.
Temperatures may drop back, though it looks like they won't this year. Look at that graph at the top again (h/t
Michael Tobis for bringing it to our attention). The arrow before "you are here" was January. The one before that was December. They are all high.
Are things starting to accelerate out of control? Can we afford to act as if they were not?
A Tipping Point for Sea Level Rise?
When seas permanently rise, it's not enough to remain on shore but higher, on a cliff looking down, for example. A higher sea erodes the cliff you're standing on, and if you've built your house near the edge, that edge will start to move back. If seas rise, steadily and quickly, for a century or more, where do you rebuild the city or town you're going to have to move? And if you don't plan to move the city, what happens, at some point to real estate prices?
It's not just that the seas are going to rise by some date. It's that before they do, property values will price in the future collapsed value of that city as well as its present uncollapsed value. Once that process starts, pricing in the future collapse in value, it rarely stops, and as you have probably observed, market collapses can happen very quickly. Again, collapsing property values could be a big potential problem for the
current generation of Americans.
The Greenland glacier, for example, holds more than
20 feet of sea level frozen in its ice. The Guardian, but a
different article:
Greenland's ice melt accelerating as surface darkens, raising sea levels
Winnowing away of the ice, exacerbated by soot blown on to the ice from wildfires, means Greenland’s ice sheet is stuck in a ‘feedback loop’
Greenland’s vast ice sheet is in the grip of a dramatic “feedback loop” where the surface has been getting darker and less reflective of the sun, helping accelerate the melting of ice and fuelling sea level rises, new research has found.
The snowy surface of Greenland started becoming significantly less reflective of solar radiation from around 1996, the analysis found, with the ice absorbing 2% more solar energy per decade from this point. At the same time, summer near-surface temperatures in Greenland have increased at a rate of around 0.74C per decade, causing the ice to melt.
This winnowing away of the ice, exacerbated by soot blown on to the ice from wildfires, means that Greenland’s ice is stuck in what is known as a “feedback loop” that will make it ever more vulnerable to warming global temperatures. The study predicts that the ice surface reflectivity, or albedo, will drop by 10% or more by the end of the century, which will trigger further melting.
“It’s melting cannibalism, basically – it’s melting that’s feeding itself,” said lead author Marco Tedesco, of Columbia University’s Lamont-Doherty Earth Observatory. “Rising temperatures are promoting more melting, and that melting is reducing albedo, which in turn is increasing melting.
Again, the rates are all accelerating. At some point, people alive today will have to worry ... for themselves.
The Arctic Is Rapidly Changing...
About the Arctic generally, here's the
excellent Chris Mooney on the large and rapid changes happening there:
Scientists are floored by what’s happening in the Arctic right now
New data from NASA and the National Oceanic and Atmospheric Administration
suggest that January of 2016 was, for the globe, a truly extraordinary month. Coming off the hottest year ever recorded (2015), January saw the greatest departure from average of any month on record, according to data provided by NASA.
But as you can see in the NASA figure above, the record breaking heat wasn’t uniformly distributed — it was particularly pronounced at the top of the world, showing temperature anomalies above 4 degrees Celsius (7.2 degrees Fahrenheit) higher than the 1951 to 1980 average in this region. ...
This unusual Arctic heat has been accompanied by a new record low level for Arctic sea ice extent during the normally ice-packed month of January, according to the National Snow and Ice Data Center — over 400,000 square miles below average for the month. And of course, that is closely tied to warm Arctic air temperatures.
“We’ve looked at the average January temperatures, and we look at what we call the 925 millibar level, about 3,000 feet up in the atmosphere,” says Mark Serreze, the center’s director. “And it was, I would say, absurdly warm across the entire Arctic Ocean.” The center reports temperature anomalies at this altitude of “more than 6 degrees Celsius (13 degrees Fahrenheit) above average” for the month.
The low sea ice situation has now continued into February. Current ice extent is well below levels at the same point in 2012, which went on to set the current record for the lowest sea ice minimum extent[.]
“We’re way down, we’re at a record low for this time of year right now,” says Serreze. When it comes to the rest of 2016 and the coming summer and fall season when ice melts across the Arctic and reaches its lowest extent, he says, “we are starting out in a deep hole.”
The Arctic is heating a lot faster relative to the rest of the globe because the northern hemisphere is where most of the industrialization — the burning of fossil fuels — is occurring. The Arctic, including Greenland and its glaciers, is changing rapidly, and it won't be changing back for a long long time.
What You Can Do
I have two suggestions, and only two. One, it's absolutely essential that people know that there's a solution, and that's to engage on a WWII-style emergency mobilization. We have the resources, and we have the need. We just need the will, and you can help with that. Click
here for more information, and
here to sign the pledge. Then tell your friends, all of them.
Two, elect Bernie Sanders. I can't be more clear. We need someone in the White House who will move with all speed, not all "campaign finance supporter-approved" speed. That's Bernie Sanders, and only he.
Blue America has endorsed Bernie Sanders for president.
Seems so to me. And thanks!
GP
Labels: climate, climate change, disaster, Gaius Publius, sea ice
