Climate alarmists are constantly warning that Earth is going to warm up, driven they say by the level of CO2 in the atmosphere. To bolster their claims they point to the Pliocene, a time 4-5 million years ago, when the planet was 4-8°C hotter and CO2 levels were 400ppm or higher. This is the climate we are heading for, the global warming supporters say—but it that really true? Superficially it seems a plausible assertion, but as it turns out there is much more here than CO2 and temperature. It is not just the average temperature but the distribution of temperature at different latitudes, both over land and sea, that controls the climate. It is the temperature gradient that drives storms and affects weather patterns and it was much different during the Pliocene. Moreover, climate models do not generate a Pliocene like climate when run with higher CO2 levels, which means climate scientists are missing something important about the way Earth's climate system works.
Scientists have long suspected that the orbital cycles of our planet are responsible for the periodic climate variation that causes alternating glacial and interglacial periods. Milankovitch's theory of orbital cycles suggests that summer insolation at high northern latitudes drives the glacial cycles. Moreover, statistical analyses have demonstrated that the glacial cycles are indeed linked to eccentricity, obliquity and precession. Now, researchers have confirmed that a combination of two of the Milankovitch cycles conspire to start and stop ice ages. The 100,000-year eccentricity cycle amplifies the influence of the 23,000-year wobble of Earth's spin axis called precession. The new modeling also suggests that the great accumulation of mass by the North American ice sheet causes the abrupt end of glacial periods. CO2 is involved, but is not determinative, in the evolution of the 100,000-year glacial cycles say the scientists.
Much has been done to vilify carbon dioxide in the media. Listening to the talking heads and on-air “experts” could lead one to believe that CO2 is an evil scourge that the world would be better off without. Nothing could be further than the truth. CO2 is necessary for life on Earth, forests in particular. It is not just plant food, the maligned gas also plays a role in regulating water use by the world's forests. New research has uncovered an unexpectedly strong decrease in H2O uptake caused by increasing CO2. Along with global increases in photosynthesis, forest growth rates, and carbon uptake, higher CO2 levels contribute to enhanced timber yields and improved water availability. Who says higher CO2 levels are a bad thing?
This must be the season to bash electric automobiles. Even the staid IEEE Spectrum featured an article questioning the ecological soundness of electric vehicles on its cover. But aren't electrics and hybrids supposed to be the way to a green future? Think again. Environmentalists' love affair with electric vehicles (EVs) seems to be over. “If you are thinking of buying an electric car for the sake of the environment, you may want to think longer.,” says Bill Sweet of IEEE's EnergyWise. “You’re not doing the planet as much of a favor as you might think.” Does this make all those Prius drivers officially posers? Or were they all just duped by a passing green fad, which, like all green fads, was based on faulty reasoning and the triumph of emotion over reality?
It has been vilified in the press and maligned in school classrooms by the ignorant. Opposing it has become a cause célèbre in Hollywood an a litmus test for liberal politicians. Labeled man's chosen weapon for ravaging nature and laying waste to the environment this poor, largely misunderstood gas is in fact essential to our existence. Without carbon dioxide, CO2, we would not be here and Earth would be a frozen lifeless chunk of rock. Forget that life would never have developed on a planet without greenhouse warming, a recent scientific study say the daemon gas has rescued the planet from the deep freeze at least twice during the Neoproterozoic era, roughly 750 to 635 million years ago.
Writing in a paper to appear in the journal Environmental Science & Technology, NASA scientist and noted climate alarmist James Hansen has come down on the side of nuclear power. He and coauthor Pushker A. Kharecha claim that getting power from nuclear energy actually saves lives. “Global nuclear power has prevented about 1.84 million air pollution-related deaths,” they report. Of course it also prevented 64 gigatonnes (Gt) CO2-equivalent greenhouse gas (GHG) emissions, when compared to the burning of fossil fuels, perhaps explaining why Hansen has suddenly become a nuclear power booster. With global warming on hiatus for the past decade and a half, the climate change cabal may be growing desperate for allies and have turned to that most unloved of energy sources—nuclear. Is this a sign that warmists and tree-huggers have a developing schism over nuclear power?
For decades the US government has funded research into “clean coal” technology. Billions of dollars have been spent with the only visible result being employment for a small army of government coal researchers and academics. Now scientists at Ohio State University have announced that, after 15 years of effort, they have produced a breakthrough—a new technology capable of turning coal green and carbon dioxide emission free. This was widely reported in the news media and passed practically without critical comment. Is it true? Is coal no longer the dirty, devil spawned fuel of evil industrialists everywhere?
Back in 2005, the IPCC Working Group III Special Report on Carbon Dioxide Capture and Storage declared that the storage of naturally and industrially produced carbon dioxide in depleted hydrocarbon reservoirs and aquifers was considered an essential component of the strategy to combat the build-up of greenhouses gases in the atmosphere. It seemed like an easy solution, pump CO2 captured from nasty coal power plants and other high volume greenhouse gas sources back into the underground reservoirs that oil and gas has been extracted from. After all, those geologic formations held hydrocarbons for millions of years—now the pumped out oil fields are just sitting there, waiting to be put to use. That was until testing was done on rock from actual cap strata. It would appear that infusing rock layers with CO2-saturated aqueous fluid can alter the properties of caprock, leading to the escape of the sequestered carbon back into the environment.
A newly released study from the Research Council of Norway has climate change alarmists abuzz. One of the things the alarmists have been pushing for is to halt warming at a 2°C increase at any cost (and they mean that literally). In the Norwegian study, much to the alarmists' dismay, researchers have arrived at an estimate of 1.9°C as the most likely level of future warming. The report also recognizes that temperatures have stabilized at 2000 levels for the past decade even though CO2 levels have continued to rise. Meanwhile, a reconstruction of the Eemian interglacial from the new NEEM ice core, published in the journal Nature, shows that in spite of a climate 8°C warmer than that of the past millennium, the ice in Northern Greenland was only a few hundred meters lower than its present level. This finding casts doubt on the projected melting of ice sheets and resulting sea-level rise.
Just when it seems that public figures can sink no lower, be more cynical, act more duplicitous, a news story comes along that plumbs new depths in ideological betrayal. And so it was this week when the shocked staff at Current TV was called to an all hands staff meeting. They were informed that the Current TV network, supposedly a bulwark of liberal green thought holding back the barbarian hoards from FOX and talk radio, had been sold to those leading mideast liberals at Al Jazeera. Former Vice President and self styled eco-prophet Al Gore has made himself a much, much richer man by doing what the political class has done since the dawn of human history—sell out to the other side.
For half a century, climate scientists have been attempting to simulate the workings of Earth's climate system in computer models. Over that period of time computers have increased in computational power a million fold, allowing models to grow in complexity and, if you accept the word of the modelers themselves, accuracy. Today's models may produce more realistic output but that should not be confused with more accurate output—modern climate models are still unable to accurately predict future fluctuations in Earth's environment. Why this should be so is highlighted in a new paper published in the Journal Of Advances In Modeling Earth Systems (JAMES), a publication of the American Geophysical Union. In it the tuning secrets of those modern-day mystics, climate modelers, are revealed.
In a mad rush to prove who can put out the most inane press release, various warm-mongers, news hacks and climate alarmists have gone on a predictable spree, trying to blame Hurricane Sandy and the resulting disaster in the US Northeast on CO2 levels. Who are these clowns? Even the IPCC issued a statement saying that global warming was not to blame. Have none of these empty headed blatherskites noticed that it has been more than seven years since a major hurricane struck the US, the longest such period since the Civil War? Evidently not, since they continue to spew unscientific twaddle and the news media continues to lap it up like a dog eating its own vomit.
One of the main problems with the “theory” of anthropogenic global warming is its reliance on rising atmospheric CO2 levels to force a global rise in temperature. This is predicted by climate change proponents by running large, complex computer models that imperfectly simulate the physics of Earths biosphere: ocean, land and atmosphere. Central to tuning these general circulation models (GCM) is a parameter called climate sensitivity, a value that purports to capture in a single number the response of global climate to a doubling of atmospheric carbon dioxide. But it has long been known that the Earth system is constantly changing—interactions shifting and factors waxing and waning—so how can a simple linear approximation capture the response of nature? The answer is, it can not, as a new perspective article in the journal Science reports.
The subject of human carbon dioxide emissions and their build up in Earth's atmosphere is at the center of the anthropogenic global warming controversy. It cannot be denied that humans produce CO2 in large amounts, both from burning fossil fuels and from land use changes. This has led to much gnashing of teeth and renting of garments by excitable ecological doomsayers, but there is something they do not mention: at the same time humanity is spewing forth carbon, nature is busily sucking up that carbon and storing it away. A new analysis of the carbon cycle has produced an unexpected result—not only is the absorption of carbon continuing unabated it has actually expanded. The latest scientific tally indicates that since 1959, approximately 350 billion tons of carbon have been emitted by humans to the atmosphere, of which about 55% has been reabsorbed by the land and oceans.
Between 15 and 20 million years (Myr) ago, Earth's climate took a pause during its long slide into the Pleistocene Ice Age for a period of real global warming. During this relatively brief time glaciers around the world retreated and there are indications that, at least around the edges of the continent, there was significant vegetation on Antarctica. Temperatures may have been as high as 11°C higher than today. Scientists say this global warm spell took place under under CO2 levels in the range of 190–850 ppmv, both significantly higher and lower than today's 390 ppmv. It is hoped that studying conditions during the Miocene warming can provide constraints on the fundamental laws governing the climate system. Why? If the Pleistocene Ice Age is truly coming to an end, as some have said, this may be the climate of the future.