Showing posts with label jokalhlaups. Show all posts
Showing posts with label jokalhlaups. Show all posts

Wednesday, June 27, 2018

The Futile Effort To Misrepresent James Hansen's Climate Predictions From 1988 Continues



 Incredibly, in the face of all the evidence the denier brigade continues its incessant drumbeat to ignore what's happening all around us and regard climate change-global warming as a myth, or at least its predictions as sensationalized and exaggerated. Here in Colorado no one is stupid or ignorant enough to believe either of those tropes. The current drought has seen the least snowpack in almost ten years and all the signs are there for a severe fire season such as we last beheld in 2012-13, e.g.
New Colorado wildfire prompts new round of evacuations
Indeed, the "416 Fire" has already wrought massive destruction in La Plata County and it's only June.  Recall for reference here that an NOAA (National Oceanic and Atmospheric Administration) projection given in 2002 forecast the American West would see extended drought, hotter weather and fire conditions into the near and distant future ...on account of climate change-global warming.    Right now seven Colorado counties classify as disaster areas because of the drought and things will only get worse as the summer progresses. Meanwhile, several rivers have reached peak flows, the Rio Grande - which originates in our state - is  down to barely 250 cubic feet per second compared to over 1400 cfs several years ago.

But the global warming "exaggerations"  nonsense keeps churning, the latest appearing June 22,  WSJ, p. A15 by two lackeys from the Libertarian CATO Institute (Pat Michaels, and Ryan Maue).  Of course, according to Libertarian ideology every manjack must cope on his or her own, such as in Puerto Rico after being flattened by Hurricane Maria. You are not supposed to "grovel" to the government for any "handouts", but do what Ayn Rand would have: do for yourself even if it means drinking toxic water out of waste dumps. Hey, at least you won't die of thirst!

According to the CATO pawns all of  James Hansen's forecasts from 1988 were either wrong or overblown by the media.  Hansen delivered three "scenario" forecasts, A, B and C with A based on "accelerating emissions" for CO2, B based on more moderate emissions, and C "the least likely" e.g. only constant emissions commencing in 2000. We now know the last was a pipedream - see top graphic-  given the relentless increase in global mean temperatures.  Despite this,  Michaels and Maue  insist: "scenario C is the winner" because:


"Global surface temperatures have not increased significantly since 2000, discounting the larger than usual El Nino of 2015-16."

But this bejabber flies in the face of the data during that time span and shown the top graphic.  Thus, "14 of the 15 warmest years occurred since 2000." This was including 2014 which "broke all records".

What gives? Are the CATO authors ignorant or just low IQ dupes? Actually, mainly ignorant.  A first clue appeared thanks to Thomas Karl, Director of the National Centers for Environmental Information of the National Oceanic and Atmospheric Administration, in a June 4, 2015 paper which appeared in the journal Science.

This concerned inconsistent data treatment, particularly in processing sea surface temperatures - especially as measured by buoys.   This error was likely compounded in conjunction with the misinterpretation of Hadley UK Center future projections on climate that I've already discussed at length, e.g.
http://brane-space.blogspot.com/2013/06/george-will-no-warming-for-last-16.html

I would even venture to say that the preponderance of false judgment by too many (mainly conservatives like George Will, i.e. in his first and only recent appearance on Bill Maher's Real Time) is due to inadequate study of the climate backstory. That includes the role of changing carbon isotope ratios over geological time, e.g.

http://brane-space.blogspot.com/2010/12/carbon-isotope-ratios-and-climate.html

As Thomas Karl noted, quoted in Eos Transactions - Earth & Space Science (July 1, 2015):

"The biggest takeaway is there is no slowdown in global warming".

Indeed, he added that warming the past fifteen years is the "strongest it's been since the latter half of the 20th century". Putting an exclamation point on that, July that year (2015) was the hottest July since records were initiated.

A good summary of the paper may be accessed at:


http://www.noaanews.noaa.gov/stories2015/noaa-analysis-journal-science-no-slowdown-in-global-warming-in-recent-years.html 



Why the measurement difficulty? Well, because the data gathering and process of analysis are inherently complex.  In order to achieve such a measurement as how Earth's average global temperature is increasing, there's a lot of "sausage making".  First, scientists must combine thousands of measurements from Earth's surface, taken by land instruments, ships. buoys and orbital satellites.

Second, each of these has its own random errors, all of which must be identified. Not only must researchers comb through the data to eliminate these errors, they must also correct for any differences in how each type of instrument measures temperature.

Thus, the authors of the Science paper had to dig into NOAA's global surface temperature analysis data to examine how sea surface temperatures (SSTs) were being measured. SSTs are measured in various ways:
-  collecting ocean water in a bucket and measuring its temperature directly

- measuring the temperature of water taken in by a ship engine as a coolant

- using floating buoys moored in the various oceans

Each technique records slightly different temperatures in the same region so scientists have to adjust the data. In the past couple decades the number of buoys has increased - adding 15% more coverage to the ocean. But because buoys tend to read colder temperatures than ships at the same locations, a measurement bias is introduced which must be corrected for. This was the primary task set out by Karl et al.  They corrected for the bias by adding 0.12C to each buoy temperature.
 


By then combining the ocean data with improved calculations of air temperatures over land around the world, Karl and colleagues found that overall global surface warming over 2000-14 was 0.116C per decade or more than twice the estimated 0.039C starting in 1998 that the IPCC had reported.


 
Basically then the WSJ's  CATO contributors are guilty mainly of rank ignorance in: a) not knowing how sea surface or other global temperatures are processed, and b) failing to appreciate the significance and why the rise in temperatures fully comports with Hansen's model.
All of this also comports with the latest data from the United Nation's World Meteorological Association that notes the atmospheric carbon dioxide concentration has now reached 403 parts per million.   

Note here that every increase in CO2 concentration by 2 ppm increases the radiative heating effect  by 2 W/m2.  Further, the increase has been by 3 ppm since 2015-16. So no surprise the UN Report concluded:  

 
"Geological records show that the current levels of CO2 correspond to an equilibrium climate last observed in the mid-Pliocene (3 - 5 million years ago) , a climate that was 2-3 degrees Celsius warmer  - where the Greenland West Antarctic Ice sheets melted - leading to sea levels that were 32- 64 feet higher than those today."

This, of course, torpedoes the CATO authors next claim e.g.
"In a 2007 case deposition Mr. Hansen stated that most of Greenland's ice would soon melt raising sea levels 23 feet over the course of 100 years."
Hmmm....looks like Hansen was pretty spot on to me, judging from the UN WMO report!  Indeed, it looks like he was way too conservative, projecting only 23 feet increase in sea level vs. the 32- 64 feet from the WMO report based on now being in a Ploiocene climate (given the CO2 concentration at 403 pm). 
Again, the two CATO clowns misjudge and misinterpret as when they cite a Nature paper  which "found only modest ice loss after 6,000 years of much warmer temperatures than human activity could ever sustain".

Failing to note that the latest findings (June 13, Nature) disclose Antarctic ice melt has tripled since 2007.   They use this to project a 15 cm sea level rise by 2100 - but this study takes no account of the Greenland melting rate - which is accelerating faster from Jokulhlaup (cf. Jokulhlaup Observed in Greenland ice sheet’, appearing in Eos: Transactions of the American Geophysical Union (Vol. 89, No. 35, 26 Aug. 2008, p. 221). The cited paper specifically noted an increased frequency in occurrence of “jokalhlaups”or sudden glacial bursts of melting runoff from glaciers. It was this phenomena that also played a role in the “unusual cracks" that set off the separation of a “chunk of ice the size of Manhattan” (19 sq. miles)from Ellesmere Island in Canada’s northern Arctic. In the case of the increasing Greenland Jokulhlaup we are looking not just at one massive breakoff, but the loss of perhaps 45% of the entire Greenland ice sheet on account of the underground splintering effects producing ever larger cracks in the ice and the inability of it to support the overlying permafrost and other ice. Thus, onset will be sudden and perhaps more like a "terror attack" from nature.
So again,  the CATO authors did not do due diligence in the preparation of their article. Other missteps are also in evidence, e.g.

 
"Have hurricanes gotten stronger, as Mr. Hansen predicted in a 2016 study? No, satellite data from 1970 onward shows no evidence of this in relation to global surface temperature."
Again, wrong.  According to SciCheck, a division of FactCheck.org:

"The most recent analysis of what’s known about the effect of climate change on hurricane activity comes from the June 28 draft of the U.S. Global Change Research Program’s Climate Science Special Report.  One of that report’s key findings said that human activities have “contributed to the observed increase in hurricane activity” in the North Atlantic Ocean since the 1970s. The Gulf of Mexico, where Harvey formed, is part of the North Atlantic Ocean.

The draft report echoes the findings of the U.N.’s Intergovernmental Panel on Climate Change’s 2013 assessment report, which found that scientists are “virtually certain” (99 percent to 100 percent confident) that there has been an “increase in the frequency and intensity of the strongest tropical cyclones since the 1970s” in the North Atlantic Ocean."


Again, this follows logically from the current 403 ppm concentration of  CO2  in the atmosphere which also must be tied to higher surface temperatures (see the graphic again) and also note he planet is currently  subject to a radiative heating effect equivalent to 2.5 x 10 7  TJ injected each year into the atmosphere or roughly 400,000 Hiroshima size A-bombs.   This in turn conforms to the observed  addition of 2 ppm  per year  in CO2 concentrations and an associated heating increase per year of             2 W/m2.    
Result?  The temperature of the planet is currently out of balance by 0.6W/ m2  and this is almost entirely due to the annual rate of CO2 concentrations increasing. This is not due to any natural phenomenon but to human injection of carbon and other greenhouse gases into the planet's climate system. The end result of which is to RAISE global temperatures!

The CATO clowns then dig themselves in deeper, asking:

"Have storms caused increasing amounts of damage to the U.S. Data from the National Oceanic and Atmospheric Administration show no such damage measured as a percentage of Gross Domestic Product"

But that is because gross domestic product is an unreliable measure, given it omits so many "externalities"  i.e. the loss in potable water, electric access after Hurricane Maria hit Puerto Rico.  And as noted in the WSJ :'The Hurricane Lull Couldn't Last', (Sept. 1, p. A15):

"The U.S. has seen 20 storms causing a billion dollars or more in damage since 2010, not including Harvey, compared with nine billion-dollar floods in the full decade of the 1980s." 


This definitely shows an alarming increase in damage, never mind the  bogus invocation of % of GDP    As  Financial Times contributor David Pilling explained in a TIME Viewpoint article ('Why GDP Is A Faulty Measure Of Success',  Feb. 5, p. 41):

"Invented in the 1930s, the figure is a child of the manufacturing age - good at measuring physical production but not the services that dominate modern economies. How would GDP measure the quality of mental health care or the availability of day care centers and parks in your area?  Even Simon Kuznets, the Belarussian economist who practically invented GDP, had doubts about his creation."
GDP is supposed to measure the total production and consumption of goods and services in the United States. But the numbers that make up the Gross Domestic Product by and large only capture the monetary transactions we can put a dollar value on. Almost everything else is left out: old growth forests that maintain cooling and act as CO2 repositories, watersheds, animal habitats, e.g. the Everglades, and costs of infrastructure maintenance. But ALL of these count toward  the physical security and welfare of a society, and assume particular import after being majorly impacted in a monster hurricane - such as the type seen over the past decade.
Michaels and Maue claim next that the "list of what didn't happen is long and tedious"  - but I could counter that by asserting the list of my subsequent demolitions of your arguments about Hansen's  "failed" predictions is also long and tedious.  For example, the dynamic duo argue:
"Hansen's models and the UN's don't consider more precise measures of how aerosols emissions counter warming caused by greenhouse gases"
Which is pure poppyock, because we've known for decades - from thermal physics - the effects of aerosols on global warming, and the former don't even make the cut of an ant fart in the wind. In this regard, .one can't forget or omit diffusive reflection and re-transmission of radiation, say arising from particulates . Chandrasekhar in Radiative Transfer, (Dover Publications) shows that for angles of incidence in the range : 0.5 < i < 0.8 radian, diffusive reflection allows the radiation reflected normal to the incidence direction to actually have higher intensity than the original. (E.g. for optical depths 1.0 < < 2.0).

In effect, if conditions in the lower atmosphere incorporate such optical depths (and angles of incidence for scattering, diffusive reflection), on account of increased presence of particulates, aerosols, then we will expect to find an "anomaly" say in the temperature. The most alarming aspect of global dimming in this regard - as made public by global dimming researchers (e.g. Dr Peter Cox) is that it has obviously deceived many (like the CATO clowns) into underestimating the true power of the greenhouse effect, including the role of CO2.
Hence, Michaels and Mauer's tripe is expected only if one hasn't properly reckoned the presence of dimming particulates- aerosols ,  especially their scattering, re-reflection (and hence false albedo effects) into global warming models! 
The key clue to the REAL agenda of the authors and their persistent misdirection is embodied in this remark:

"Why should people world wide pay drastic costs to cut emissions when the global temperature is acting as if the cuts have already been made?"

Actually, my fine pair of CATO clowns, the global temperatures are NOT acting any such way other than in your fevered imaginations.  Again, see the top graphic of continuous increases in worldwide temperatures.  The point here is that Maue and Michaels have exposed their hand as primarily concerned with economic costs, hence they qualify as agnotologists - not climatologists.  Stanford historian of science Robert Proctor has correctly tied this shtick to the trend of skeptic science sown deliberately and for political or economic ends . In other words, the supporters of agnotology - whoever they may be- are all committed to one end: destroying the science to enable economic profit and hence planetary ruin. 
Michaels and Maue fit this profile to a tee, and is the biggest reason why their op-ed needs to be taken with a grain of salt, or ... with the gravitas of a solitary ant fart.

Tuesday, May 2, 2017

More on the Rift Associated With West Antarctic Ice Shelf

No automatic alt text available.Image of the rift in Pine Island Glacier ice shelf in West Antarctica photographed from the air during a NASA imaging operation in November, 2016.  This is the second rift to form in three years.


In this era of fake news and rampant pseudo-science, as well as science denial, climate scientists have been trying desperately to warn of the disastrous consequences if the West Antarctic ice sheet were to collapse.  For example, based on current computer projection models, such a collapse could lead to a sea level rise of nearly 3 meters (10 feet) which would be enough to inundate major U.S. cities such as New York, Miami and Jacksonville, while displacing 150 million people inhabiting coasts worldwide.

To set the scene: In 2015 a nearly 225 square mile iceberg broke off from Pine Island Glacier. However, it wasn't until climate scientists began testing new imaging processing software that something peculiar was notice in the Landsat 8 images.  That is, a rift was observed in the surfac3e of the ice shelf nearly 20 miles inland. The Landsat marked date was tracked to 2013. Overt 2 years the rift grew until it set the iceberg adrift in late July, early August, 2015.  During this interval a similar rift opened up 6 miles further inland from the first.

To be sure, such rifts usually form at the sides of an ice shelf where ice is thinner and also subject to shearing that rips it asunder. However, this particular rift (shown in the above image) originated at the center of the Pine Island Glacier's ice shelf then propagated to its margins. The implication is that some agent weakened the center of the ice shelf and the most plausible culprit appears to be a crevasse that melted out a bedrock level. This in turn was most likely driven by a warmer ocean.

The observed fact that the rift opened in the bottom of a 'valley' in the shelf  (where the ice had thinned) provides yet another clue the center of the ice shelf is weak. The 'valley' formation is also something the Antarctic researchers had long suspected given ocean water can intrude far inland and remain unseen. This is also associated with the fact the bottom of the West Antarctic ice sheet lies below sea level.

The rift's origin, interestingly, might have remained unseen if not for the fact the images were taken when the Sun was low in the sky. Thus, long shadows were created across the ice and white snow that provided visibility and drew the team's attention to the valley that had formed there.

It needs to be noted that such 'rifting' behavior provides a mechanism for rapid retreat of glaciers.  Indeed, similar subsurface rifting has been observed in the Greenland ice sheet (jokalhlaup) where ocean water has seeped inland along the bedrock and begun to melt the ice from underneath.  Now the Landsat images provide the first strong evidence that the large Antarctic ice shelves respond to changes at the ocean edge like the Greenland ice shelf.

For a more complete look at the relevant research go to:

https://doi.org/10.1002/2016GL071360


Thursday, January 1, 2015

2015: Will The Pace of Climate Change Be Slowed? Unfortunately, No.


NASA imagery

After a tumultuous year of climate upheaval which saw mile-wide tornadoes strike Mississippi and Alabama, a tornado even outside of LA, monster typhoons striking the Philippines - one even so strong it dislodged the polar vortex, and a snow event of epic proportions striking Buffalo - not to mention continued extreme drought in many places, many want to know if 2015 will provide any relief.

Unfortunately, the projections -  based on quantifiable indicators, including the injection -deposition of carbon loads into the atmosphere, and the rate of melting of the Arctic Ice cap  - as well as reduction of Antarctic ice shelf - show this isn't likely to happen.

Germane to the issue of carbon deposition there are three numbers we had better keep close track of if we want to preserve even a semblance of a livable world ('Mystery of the Three Scary Numbers', UTNE Reader, Jan-Feb, 2014, p. 18):

 2 degrees Celsius or 3.6  degrees Fahrenheit

- 565 gigatons or 565 thousand million tons

- 2, 795 gigatons


The first number is the upper threshold for the global mean temperature to increase over this century without seeing the planet go into the crapper. According to climate scientist Bill McKibben, even a 2C increase is fraught with danger, with much longer -more sustained polar vortices, much more frequent and intense tropical cyclones (hurricanes, typhoons), more F5 tornadoes in the U.S., more persistent droughts, higher ocean acidification and dying coral reefs, and more wildfires in the American West. 

The second number represents the peak of humanity's carbon budget. It's the most carbon we can afford to pour into the atmosphere without triggering the 2 C temperature increase.  For reference, humans poured some 30.6 gigatons into the atmosphere in 2011 and it is projected that unless massive carbon cuts go into effect we will pass the 565 gigaton threshold in 16 years. That means we will likely trigger the 2 C increase in that time - with all the havoc that implies.

The third number is perhaps the most worrisome of all and the one that instills fear into most who know what the future portends if we don't stop our reckless foolishness -including the fracking craze. It represents the total stored reserves of carbon held by coal, gas and oil companies. It was first highlighted and brought to global attention by the Carbon Tracker Initiative - a group of London financial analysts and environmentalists.  It is what the fossil fuel industry plans to exploit in the future by its whole spectrum of methods, whether deep sea drilling, oil shale fracking or natural gas fracking.

It is, in other words, five times more carbon than will already blow a gasket in our world and send it toward runaway greenhouse perdition.

As the UTNE piece observes:

"Burning those fossil fuels we would enter a world of science fiction dystopia: a rise in sea levels not seen in human history, species extinction, droughts, super storms, heat waves from hell....and consequences you cannot imagine".

So what does 2015 portend in the way of climate crises, events? 

Polar vortex intrusions:

More are expected - both early this year and later. Again, recall the significance of the polar vortex: that is, it's the first sign of an ongoing Arctic instability associated with its extraordinary polar warming - again first revealed by Prof. Gunther Weller as early as 1986. As the melting ice proceeds faster the instability will become more and more pronounced leading to more such events in the years to come. Until the point is reached that the 'fridge' has totally defrosted leading to monumental climate upheaval and prolonged heat waves around the world - as well as the first "year of no seasons."


Violent tornado season:
Because of the several frigid dips expected of the polar vortex, there will be inevitable collisions with warm air flowing up from the Gulf.  The colder the air in the vortex, the more violent the result when warm air meets cold - setting off hundreds of tornadoes in the plains, southeast.  As years go by,  leading to the first 'year of no seasons'  ca. 2040,  this template will be repeated with ever increasing intensity.

Wildfires in the West, Southwest:

Again, the dry conditions in the region set the stage for raging wildfires in the spring.  Adding to the crisis is that the water tables from California to Colorado are dramatically low - leading to the proposal of extreme solutions to cope, such as recycling toilet water, e.g.

Fracking in the same arid states hasn't helped the situation given each frack well consumes up to 5 million gallons of fresh water. Not to put too fine a point on it, but it's the height of insanity as much as using corn to make ethanol.

Further loss of land to rising seas:
A recent visit to Barbados (last May) reminded us of the extent to which the island is at risk of losing its precious beaches. With each passing year more coastal land is reclaimed due to the inexorably rising sea and now- unlike thirty years ago - you won't find one single climate change skeptic. (Though there are the few oddballs who refuse to go the anthropogenic route).  

Barbados isn't alone in this phenomenon, but the problem is that unless you live there or you're on certain islands like Kiribati, see e.g.
http://www.huffingtonpost.com/2014/09/22/kiribati-president-buying-land_n_5860064.html

you will be oblivious to the threat.

Collapse of Greenland's Ice Sheet:

This is one of the 'feeding factors' leading to sea rise and will ramp up this year as the Jokulhlaup phenomenon reaches new intensity.  Recall, "jokulhlaups”or sudden glacial bursts of melting runoff from glaciers, first emerged with a landmark paper in 2008 ('Jokulhlaup Observed in Greenland ice sheet’, in Eos: Transactions of the American Geophysical Union , Vol. 89, No. 35, 26 Aug. 2008, p. 221). The cited paper specifically noted the separation of a “chunk of ice the size of Manhattan” (19 sq. miles)from Ellesmere Island in Canada’s northern Arctic. In the case of the increasing Greenland Jokulhlaup we are looking not just at one massive breakoff, but the loss of perhaps 45% of the entire Greenland ice sheet on account of the underground splintering effects producing ever larger cracks in the ice and the inability of it to support the overlying permafrost and other ice. Thus, onset will be sudden and perhaps more like a "terror attack" from nature.  Watch for this phenomenon to reach new heights this year.

What can you do to stay informed, apart from reading this blog?

I suggest every reader needs to obtain Naomi Klein's This Changes Everything: Capitalism Vs. Climate Change this year and study it cover to cover  - I'd say as a New Year's resolution.  Klein uses her trademark rigorous logic combined with scientific facts to prove capitalism is unable to affect or alter  the course of climate change due to its inherent dependence on cheap fossil fuels and need for continuous growth. Also,  the time for marginal fixes has expired, thus forcing us to now make radical changes in how we live. 

 We simply don't have the luxury of using all the carbon that lies inside the Earth. Yet capitalism's never ending growth engine would demand we do so to support the expansion of new markets for exploitation.