When it comes to climate, the early Paleogene period (~65-34 mya), at the start of the Cenozoic Era, had one of the most Eden like climates of the Phanerozoic Eon. As the Cenozoic progressed a cooling trend set in leading up to the formation of permanent ice caps and the Pleistocene Ice Age we are still experiencing. But before the world started to ice up our planet underwent one of the most dramatic bouts of global warming known to science—the Paleocene Eocene Thermal Maximum or PETM. Recently, global warming activists have tried to liken human CO2 emissions to the cause of the PETM, 55 million years ago. Is it true, that our actions may trigger a sudden sharp rise in global temperature?
Many news outlets are reporting that the Environmental Protection Agency may have suppressed an internal report that was skeptical of claims about global warming. While this has conspiracy theorists all a twitter, the truly shocking thing is the content of that report. The executive summary contains a list of items contradicting claim after claim put forth by the IPCC and global warming alarmists. The contents are nothing short of incendiary.
The US House of Representatives has barely managed to pass a sweeping climate change bill that had the bill's supporters bringing at least one house member out of rehab to ensure passage. The 1,200 page bill—formally known as the “American Clean Energy and Security Act”—has been called “the worst piece of legislation in the history of the House.” The massive bill would affect all aspects of the U.S. economy: the way electricity is generated, how homes and offices are designed, how foreign trade is conducted and how much Americans pay to drive cars and to heat their homes.
For many years the Committee for Skeptical Inquiry (formerly CSICOP) has published the Skeptical Inquirer, a magazine dedicated to rational thought and a scientific view of the world around us. Mostly concerned with debunking pseudoscience and mystical beliefs, its articles mostly concerned UFOs, bigfoot sightings, psychic spoon benders and spirit mediums. Now, unfortunately, it seems they have allied this previously skeptical magazine with one of the biggest scientific scams of our time, anthropogenic global warming.
Having reported that scientists did not find CO2 responsible for a change in the duration of ice age glacial periods 700,00 years ago, another new report takes a look at the conditions around the last interglacial warm period and our own Holocene warming. Using corals from the south seas paradise of Tahiti to track sea-level changes, researchers probed the mechanisms driving Earth's climate between glacial and interglacial states. Almost as an after thought they added that there is no longer any doubt: changes in sea-level drive changes in CO2, not the other way around.
Around 1.2 million years ago, a shift in global climate began that caused a change in the timing of the alternating warm and cold periods—called interglacials and glacials—that have persisted during the Pleistocene Ice Age. Prior to that time, ice age glacial periods lasted about 40,000 years but since ~700,000 years ago ice-age cycles have lasted for around 100,000 years. Orbital variations, called the Croll-Milankovitch cycles, do exert some forcing on the 100,000 year time scale, but it is relatively weak. Orbital cycles seem to many too feeble an explanation for the change in glacial-interglacial timing. Some scientists have attempted to attribute the timing shift to a drop in CO2 but a new study confirms that carbon dioxide levels were not the cause of the climate shift.
In a new report, scientists used seven different climate models to assess human induced land cover change (LCC) at regional and global scales. The first results from the LUCID (Land-Use and Climate, IDentification of robust impacts) intercomparison study by Pitman et al. show no agreement among the models. This study indicates that land cover change is “regionally significant, but it is not feasible to impose a common LCC across multiple models for the next IPCC assessment.” In other words, this important factor is missing from current models and scientists are at a loss as to how to add it.
It is no surprise to anyone who has studied the history of our planet and the life it harbors that CO2 levels have been falling for billions of years. Despite all the hoopla over rising CO2 levels, eventually Earth will have lost so much carbon dioxide from its atmosphere that plants and trees will suffocate, signaling an end to life as we know it. Now, a team of scientists from the California Institute of Technology, led by physicist King-Fai Li, have proposed a way to avert disaster—get rid of much of the atmosphere.
The lingering cool temperatures being experience by much of North America has weather forecasters wondering if we are entering a new Little Ice Age—a reference to the prolonged period of cold weather that afflicted the world for centuries and didn't end until just prior to the American Civil War. From historical records, scientists have found a strong correlation between low sunspot activity and a cooling climate. At the end of May, an international panel of experts led by NOAA and sponsored by NASA released a new prediction for the next solar cycle: Solar Cycle 24 will be one of the weakest in recent memory. Are we about to start a new Little Ice Age?
The ineffectiveness of biofuels—ethanol and biodiesil—has been much in the news lately, with reports from the EPA, California's CARB and the EU's joint Research Council claiming that biofuels pollute more than the fossil fuels they are supposed to replace. Still, this has not prevented the biofuels industry from receiving big government subsidies. Now a new report discloses another reason to shun biofuels, one that has nothing to do with CO2 and everything to do with H2O. When the water use of biofuel feedstock crops is analyzed, the water footprint (WF) ranges from 1,400 to an astounding 20,000 gallons of water for each gallon of biofuel produced.
One of the fundamental aspects of Earth's ecological and climate systems is the way carbon moves through the biosphere. From land to air to water, through living organisms and even the plant's crust, carbon—the stuff of life—is always on the move. Scientists thought they had a pretty good understanding of how the carbon cycle works, until now. Recent work with strange, jellyfish like creatures called thaliaceans is causing scientists to re-evaluate the workings of the carbon cycle.
Here is a sure fire, hit concept for a “news” show: life as we know it comes to an end, our civilization crumbles, leaving only ruins and the inane voice-over narration provided by some of the dimmest minds of our time. And to make it seem au courant, make up a main character—call her Lucy—to give voice to utterances even the most fanatical climate change alarmists would blanch at. To keep costs down, make her a waifish comic book cutout in a vaguely manga style. Lucy leads a charmed life, traveling back and forth across America, always arriving at a new destination just in time for the next horrific man-made ecological disaster.
The formation of low-level clouds—clouds that have a cooling effect on Earth's climate—has vexed climate scientists for years. Current climate models treat cloud cover simplistically and make the assumption that cloud cover decreases as temperatures rise. New data from a cloud sampling experiment indicates that biological material—bacteria, spores and plant material—may account for 1/3 of the airborne material involved in cloud formation. Furthermore, biological material can form clouds at much warmer temperatures than mineral dust. These new discoveries indicate that modelers have the effects of temperature on low cloud cover backwards, placing all model predictions in doubt.
Michael E. “Hockey Stick” Mann, director of the Earth System Science Center at Pennsylvania State University and a co-founder of the climate change website RealClimate.org, was back in the news this week providing commentary for a Seed magazine on-line article, that asks the question “is there a better word for doom?” Mann defended the proper "framing" of environmental issues in order to convince the lay public about the importance of global warming.