Showing posts with label National Snow and Ice Data Center. Show all posts
Showing posts with label National Snow and Ice Data Center. Show all posts

Friday, February 26, 2016

El Nino Triggering Greater Arctic Instability And Record Heat, Melting

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When climate scientists - real ones, not pretenders in the employ of the fossil fuelers - worry about records for low sea ice, or rapid melting of glaciers, or new heat records - are they exaggerating? When exactly is a climate record really a record? When is melting sea ice in the Arctic (or Antarctic) a record? When is collapse of the Greenland ice sheet a record? When is the increase in sea level a record? When is the increase in global mean temperature a record?

To the denier contingent, of course, there are no such things as any climate change records, because they are convinced it's all some grand, convoluted conspiracy by government and climate scientists. To these mostly brainwashed fools climate change is just an elaborate hoax. Never mind that, as in the case of rising seas, the Vietnamese are already having to build coastline dikes and massive seawalls to fortify earthen levees against rising seas. The latter are allowing seawater to penetrate as far as 60 km inland (in the Mekong delta) ruining rice crops.(WSJ, 'Vietnam's New Tack In Climate Fight', Feb. 25, p. A9)

Clearly, it's pretty easy to be a denier when your own life and livelihood isn't adversely affected, and you can just sit in your comfy chair and make vapid armchair pronouncements- when superior minds (scientific ones) actually have the data and first hand accounts.

The accumulating data over the past seven or eight years is now consolidating the current picture of the world we inhabit and it isn't pretty. It shows we may have already entered the world of initial climate anomaly that is likely to soon become permanent. This could be interpreted as meaning we are already on the cusp of the runaway greenhouse effect.  In that case, we're not just talking about global warming but warming on 'steroids'.

 New data from NASA and the National Oceanic and Atmospheric Administration show that January was, for the entire  globe, an extraordinary month. In particular the data showed the Arctic to take the brunt of heating (see graphic) with a temperature increase more than 7.2 degrees Fahrenheit higher than the 1951 to 1980 average in this region. (This data constitutes a "zonal mean" temperature map, which shows how the temperature departures from average change based on one's latitude location on Earth.)

This Arctic heat emphasis exposed in the zonal temperature map dovetails with Prof. Gunter Weller's predictions (from the mid -1980s) - based on his ice core analyses- that future warming would be greatest in the Arctic.  This is  a phenomenon known as "Arctic amplification".

It also means we have much to fear in terms of climatic-based catastrophes. For example, a much warmer Arctic means a much more unstable polar region with more frequent intrusions of the polar vortex,  leading to frigid temperatures in parts of the U.S. but with the added potential of triggering severe, violent storms when the cold fronts spawned collide with warmer air

Let's now move on to records while we're at it. The Arctic heat anomaly 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 more than 400,000 square miles of the region is below average  for the month. This in turn is closely tied to warmer Arctic air temperatures. According to Mark Serreze, Director of the Center:

"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. And it was, I would say, absurdly warm across the entire Arctic Ocean."

He added that the Center reports temperature anomalies at this altitude of "more than 6 degrees Celsius (13 degrees Fahrenheit) above average" for the month. Bear in mind that a 6C increase for the entire globe would be associated with the onset of the runaway greenhouse effect, as Carl Sagan first pointed out in his essay, 'Ambush, the Warming of the World' in his book, 'Billions and Billions.'


The low sea ice situation has now continued into February, as Serreze observes:
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"We're way down. We're at a record low for this time of year right now.  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, we are starting out in a deep hole."

The cause is tied to El Nino which is also an offshoot of the global warming phenomenon as S. George Philander originally showed. (Eos: Transactions of the American Geophysical Union (March 31, 1998):Who is El Nino?’)   Philander pointed out that exacerbated ocean temperatures are largely tied to heating effects  in El Nino years. Notably,  for the past several months these ocean temperatures have reached 3.6F higher than normal - so no surprise at the record sea ice melt.

Jennifer Francis, a climate researcher at Rutgers who focuses on the Arctic has argued that Arctic changes are changing midlatitude weather by causing wobbles in the jet stream. We've actually seen multiple instances of this over the past couple months. According to her:

"We've got this huge El NiƱo out there, we have the warm blob in the northeast Pacific, the cool blob in the Atlantic, and this ridiculously warm Arctic. All these things happening at the same time that have never happened before."

And ultimately, they are all tied to climate change- global warming. Look for more records to be set this spring and summer.

Saturday, February 23, 2013

Yep, Lots of Snow....But There's Still Global Warming!


Graph of radiocarbon (C14) excess over C12 over ~ 2,000 yr. period. The zero level is an arbitrary norm referenced to 1890. This is some of the best evidence for man-made global warming but few who have never taken physics can grasp its significance.


Wifey and I while shoveling out our driveway the other morning joked about all the snow, and how some lamebrains might pick up on it and deny - on the basis of the latest huge snowstorm- that global warming /climate change is real.  And, truth be told, when you see some of the idiotic comments in the blogosphere, you realize just how many in our population aren't able to make the subtle but necessary connections.

This false cognitive dissonance phenomenon, as well as others (i.e. fundies trying to recruit astrophysics to support their creationist codswallop) reminds me of a recent article ( Darwin’s March’) in the Intertel journal, INTEGRA (Feb., p.27), by Dr. Steven B. Mason.  He notes that in some public schools, the teaching of evolution (or "Darwin's march") must share equal time with "creation Science", adding:

‘Mostly this is a system of explaining by inventing and couldn’t be further from the understanding, predicting and controlling of a true science. But it sounds good to those that don’t know better and most people don’t. Learning a hard science like mathematics or chemistry or  physics is, well, hard  The vast majority of humans are simply incapable of doing so. And yet this obvious fact is sure to be hooted and hollered down.”

Indeed! And on that basis, Mason correctly refutes the silly notion that "we're all capable of learning whatever we put our minds to".

But in order to puncture that myth that anyone can learn anything, and hence idiot fundies are as entitled to expostulate on general astrophysics - stellar structure - the Big Bang - as I am, is what requires those of us who have studied the hard sciences to post tests of aptitude from time to time, to see if these windbags can walk the walk as well as talk the talk.

For similar reasons, climate deniers (like fundie creationists) are equally childish and uneducated. Mainly they don't learn the physics of climate or atmsopheric research themselves, but google it from assorted whacko freaks who pride themselves on an abiding ignorance.  Also, they have extreme difficulty processing blogs that present actual scientific data and report them accurately, see e.g. http://www.brane-space.blogspot.com/2010/12/carbon-isotope-ratios-and-climate.html

Thus, it's not surprising they'd have extreme difficulty reconciling the huge recent snowfalls, and even blizzards, with the reality of global warming.  But the answer lies in atmospheric physics, if one is prepared to dig it out.  The basics? Well, a warmer atmosphere can hold, and hence 'dump', more moisture including as snow. In fact, two soon-to-be-published studies demonstrate how there can be more giant blizzards yet less snow overall each year. Projections from such studies are therefore that such anomalous events are likely to continue with manmade global warming. This will remain until a critical threshold is reached, probably when the CO2 concentration in the atmosphere hits 550 ppm. Then, we will have the first year of no seasons, and no more snow-blizzard events, only warming. And how it will warm!

Consider the anomalous aspect: The United States has been walloped by twice as many of the most extreme snowstorms in the past 50 years than in the previous 60 years, according to an upcoming study on extreme weather by leading federal and university climate scientists.  Yet the Global Snow Lab at Rutgers University says spring snow cover in the Northern Hemisphere has shrunk on average by 1 million square miles in the past 45 years.

Another anomaly: computer models predict annual global snowfall to shrink by more than a foot in the next 50 years. According to Princeton University climate scientist Michael Oppenheimer:

""Shorter snow season, less snow overall, but the occasional knockout punch.That's the world we live in."

Other climate scientists assert that the idea of less snow and more blizzards makes sense: A warmer world is likely to decrease the overall amount of snow falling each year and shrink the snow season. But when it is cold enough for a snowstorm to hit, the slightly warmer air is often carrying more moisture, producing potentially historic blizzards. According to Mark Serreze, director of the National Snow and Ice Data Center


"Strong snowstorms thrive on the ragged edge of temperature—warm enough for the air to hold lots of moisture, meaning lots of precipitation, but just cold enough for it to fall as snow. Increasingly, it seems that we're on that ragged edge."

As Exhibit 'A',  look at the last few years in the Northeast. Or take Chicago, which until late January had 335 days without more than an inch of snow. Both have been hit with historic storms in recent years.

Pennsylvania State University climate scientist Michael Mann points to the recent Northeast storm that dumped more than 30 inches in some places. He said it was the result of a perfect set of conditions for such an event: arctic air colliding with unusually warm oceans that produced extra large amounts of moisture and big temperature contrasts, which drive storms. Those all meant more energy, more moisture and thus more snow, he said.

And Princeton researcher Sarah Kapnick adds:

"The world is warming so precipitation that would normally fall as snow in the future will probably fall as rain once it gets above the freezing point."

This will plausibly happen when the 550 ppm threshold is reached. So we can look for an ugly world divided by extreme drought and torrential rains, that pour and pour. For others, living in the 'heat zones', unremitting and unbearable heat will be the order of the day as temperatures regularly hit 115F in the shade and night time temperatures seldom dip below 100F. This will be amongst the first omens to signal the approach of the runaway greenhouse.

Will the poppets who deny global warming take note? Of course not! They all think - like too many of the fundies- they can blather on about anything to do with physics, or biology or chemistry, despite never having taken and passed a single university course!