Ice Ages: In the past, the Earth’s temperature has varied from the Ice Ages to the much warmer temperatures of the interglacial periods.  Ice core data gives a good picture of what has happened to the Earth’s temperature in the last half million years, as shown by the blue line. The changing temperatures are attributed to the  Milankovitch cycles,  small variations in the Earth’s orbit that cause the Earth to receive different amounts of sunlight. The Earth becomes slowly warmer during the periods where the solar energy increases. As the Earth begins to be warmed by sunlight, CO2 becomes less soluble in the ocean and the CO2 concentration in the atmosphere increases, which further amplifies the warming since CO2 is a greenhouse gas.  The CO2 did not rise above 300 ppm in any of the the warmer interglacial periods but it is now 392 ppm and rising.

  CO2: Man is now putting about 30 billion tons of carbon dioxide into the air each year. About half of it dissolves in the ocean, making them 20% more acidic, and the rest increases the concentration in the air.

Temperature: CO2 is one of the greenhouse gases that warm the Earth, and NASA’s graph shows how its increase is changing the Earth’s temperature:

The Sun: The current global warming is often wrongly attributed to an increase in intensity of the sun. The sunspot activity does not show up above the noise in the temperature record above – and the solar irradiance increased slightly until 1960 and has declined slightly since then.

 Arctic Ice: Many of the changes in the Earth are subtle but this NASA picture clearly shows  how the Earth is changing:

  Arctic ice:  The next two graphs show quantitatively how both the extent and the volume of the Arctic ice is changing.

Arctic ice volume at each years minimum.

 Antarctica: Research by Steig and by O’Donnell  show that Antarctica is warming. The warmer oceans result in more snowfall which increases the inland glacier mass, but the erosion of ice by the warmer oceans is causing an overall loss of ice mass.

Antarctic Ice Mass from GRACE satellite data.

Greenland: The Greenland ice sheets are also beginning to decline, also.

Ocean Level Rise: The melting ice sheets, melting glaciers, and thermal expansion are causing the oceans to rise by about 3 mm per year which, though it seems small, amounts to an increase in ocean volume of 1190 cubic kilometers/yr.

Rise in Sea Level.

 Severe Weather: Warmer temperatures increase both the rate of evaporation and the energy and moisture in the air. This increases the risk of severe weather, droughts, and wildfires. Large insurance companies such as Suisse Re now consider global warming a risk factor as there has been a fivefold increase in billion-dollar weather events in the last 30 years.

 Droughts: Below is the Palmer Drought Index which includes most of the continental areas used for food production. Zero represents average rainfall and -4 represents extreme drought. After 1980, drought conditions have grown worse worldwide, and no one disputes the effect of droughts on food production. 

Note : This was posted on 08/31/2011 and last updated on 04/03/2012 .

(c) 2011  J.C. Moore

The EPA has been charged with reducing the pollutants released into the environment, but they are meeting opposition from power companies, politicians, and people who want cheap energy, though other people  and the environment may suffer the consequences.

The Environmental Protection Agency is seeking a 95 percent reduction in emissions at three of Oklahoma’s coal-fired power plants. This has brought howls from the utility companies and from Oklahoma’s politicians. Utility companies claim that installing scrubbers or converting to natural gas will cost them billions of dollars and drive the rates for electricity up by 10 to 12%. The utility companies have defined the costs for the plant conversions or upgrades in the worst possible terms, without considering the long-term savings.  Conversion to natural gas would eliminate the problem of  coal combustion products such as acidic gases, mercury vapor, fly ash, and bottom ash. Although coal is cheaper than other fuels, it delivers less energy per unit of CO2 produced. Coal  produces 314 kJ/mole while natural gas produces 890 kJ/mole, almost 3 times that of coal. Considering Oklahoma’s abundant supplies of natural gas, it would make sense for Oklahoma to begin switching power plants to natural gas.

The power companies and the politicians have tried to define the problem as the cost of the  “elimination of haze”, as if there were no other environmental damage done by burning coal. That is because the elimination of haze under the Clean Air Act is all the EPA is presently empowered to do. Coal is 65 to 95 % carbon. What about the rest? Coal contains small amounts of mercury, chromium, lead, cadmium, arsenic, sulfur, particulates, and radioactive isotopes. Man burns 6 billion tons of coal each year, releasing millions of tons of pollutants into the air and leaving several hundred million tons behind in the coal ash. Some pollutants eventually find their way into the water, the food chain, and into us. Oklahoma has adopted limits on fish consumption because of high levels of mercury. For comparison, mercury is 100 times as toxic as cyanide, arsenic is 20 times as toxic, and chromium(VI) is 4 times as toxic. These three are also are carcinogenic and accumulate in tissue. Even exposure below the allowed levels increases the chance of cancer over time. The small town of Bokoshe, Oklahoma is located near an unregulated fly ash disposal site. The incidence of cancer among the residents of the town is extraordinarily high, though the power company claims there is no link between that and their fly ash.

The sulfur and nitrogen oxides released by coal combustion harm plants and produce acid rain. A recent article headlined “Pecan growers say coal-fired plant killing trees” described the plight of orchards downwind from a power plant with inadequate pollution controls. One farmer said his pecan crop dropped over the years from 200,000 to 8,000 pounds. The combustion of coal  also releases 30 billion tons of carbon dioxide into the air each year. Because  CO2 in 3water is an acidic, the oceans have become over 20% more acidic in the last century. That has led to the destruction of coral reefs and endangered crustaceans and the phytoplankton that convert CO2 to oxygen. Without phytoplankton, life in the oceans would be impossible. The concentration of CO2 in the air has increased 38% as well.  As a potent greenhouse gas, it is causing the Earth to warm, glaciers and polar ice to melt, and the climate to change in ways we will not always like. The Supreme Court, in Massachusetts v. EPA, ordered the EPA to make a determination as to whether carbon dioxide is a pollutant. The EPA has found, based on the best scientific evidence, that CO2 is an endangerment to public health and has moved forward to regulate it.

Oklahoma’s politicians, such as Sen. Jim Inhofe and  Congressman Dan Boren, are working on a solution- for the power companies benefit. They want to strip the  EPA of  its power to regulate pollution.  They also claim it is a states rights issue, and that the EPA has no business regulating Oklahoma industries. However, the pollution generated by Oklahoma’s power plants does not stay within its borders, nor is all the pollution in Oklahoma from Oklahoma sources. Much of it blows up from Texas, the state with the highest number of power plants out of compliance. Acidic gases released by coal combustion, and even mercury vapor, can travel for thousands of miles before being brought to Earth by precipitation, and much of the CO2 will stay in the air for centuries. Regulation of carbon emissions needs to be done on a national and even international level. It is a bad idea to focus on short term economic costs while ignoring the environmental costs, such as polluting the Earth and letting rural Oklahoma become a dumping ground for the power companies’ waste.

(C) 2011 J.C. Moore

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The U.S. Republican leaders are blocking climate legislation, leaving the EPA in the position of having to regulate carbon emissions. Many Republicans in Congress are unhappy with the EPA and are now claiming the EPA regulation of CO2 is a “power grab”.

Progress has been limited at the climate meetings in Copenhagen and in Cancun because the U.S. has not acted to restrict its carbon emissions. The U.S. is second to China  in emissions but emits six times as much CO2 on a per capita basis. If the U.S. is not willing to reduce its emissions, why should other countries?  The U.S. came very close to passing cap-an-trade but it failed when John McCain (R Az) backed out of the deal because of a challenge from a far right candidate in the last election. Reducing CO2 emissions has been cast as a liberal issue and many conservatives oppose it for that reason. The wins by Republicans in the last election almost insure that action on a responsible policy will be delayed by at least two years. That is a shame as many Republicans in the past have been strong supporters of the environmental issues.

The Republican leadership adopted opposition to environmental regulations as a campaign strategy. They sent out propaganda based on slick reports produced by conservative think tanks, rather than science, and they inflated the cost of environmental legislation by a factor of twenty – while not mentioning any of the benefits. The propaganda has been passed along to voters in town hall meeting and press releases. The EPA has used science as a basis for its decisions and has moved to limit CO2 emissions as an air pollutant under existing regulations in the Clean Air Act. This has infuriated many Republicans anfd they have challenged the EPA’s right to do, calling it a “power grab”.

My Congressman,  Frank Lucas (R-OK), has spoken disparagingly of environmental regulations in his town hall meetings and in opinion pieces he has sent to the states major newspapers. He also writes a column that goes to many small town newspapers called “Frankly Speaking”. In his column, he has  labelled the EPA’s actions to limit carbon emissions as  “the EPA power grab” . That is hardly the case. The Supreme Court, in Massachusetts v. EPA, found the Environmental Protection Agency could make a determination as to whether carbon dioxide is a pollutant. The EPA has found, based on the best scientific evidence, that CO2 is an endangerment to public health and has moved forward to regulate it.

If Congress had acted to develop a sound energy policy and to curb pollution, the  EPA would not be forced to act in the matter. Regulations passed to limit carbon emissions would fall mainly on the coal industry and would favor a shift in the short term to petroleum and natural gas, both abundant in Oklahoma. Many from the petroleum and gas industries originally supported the cap-and -trade bill. However, all the OK Republican Congressmen sat out the process and let the Democrats from coal producing states load up the cap-and-trade bill with perks for coal producing states. Some of  Oklahoma’s industrial leaders see that limiting carbon emissions could be favorable to the Oklahoma economy, but apparently, the elected representatives have not caught on yet.

And, it is not just about the CO2 or climate change. Along with the 30 billion tons of CO2 we put into the air annually are large amounts of mercury, lead, cadmium, arsenic, sulfur oxides, nitrogen oxides, particulates, and radioactive isotopes of radon. Those end up in the air, the water, and the food chain. We are now finding mercury in fish and some places, even in Oklahoma, have limits on consumption. The oceans are now 20% more acidic and economically important fisheries are threatened. Whether we cap pollution, tax it, or strictly regulate it – something must be done and soon. The EPA regulation is a stop gap meaure and the U.S. Congress needs to stop the politics and pass a sound energy policy and meaningful environmental regulations.

(C) 2010 J.C. Moore

And, of course, the Earth does not care if man becomes extinct.

George Wills latest excursion into climate science (1) was inspired by the American Scholar which had on the cover  “The Earth Doesn’t Care if You Drive a Hybrid” and  Robert B. Laughlin’s essay inside “What the Earth Knows.” (2) George Will likes to look at things in terms of geologic times as it obscures the damage man is doing to the Earth. He summarizes Laughlin’s article as:

“What humans do to, and ostensibly for, the earth does not matter in the long run, and the long run is what matters to the earth. We must, Laughlin says, think about the earth’s past in terms of geologic time.”

George Will is also afraid that environmental regulations will inconvenience him, so he loved the quote from the article:

“Buy a hybrid, turn off your air conditioner, unplug your refrigerator, yank your phone charger from the wall socket—such actions will leave the end result exactly the same.”

I can imagine Mr. Will beaming as he was able to quote  a Nobel Prize winning physicist, albeit in theoretical physics, who agreed with him. Yet, you might wonder, what will that “end result” be?

And, Laughlin says:

“Someday, all the fossil fuels that used to be in the ground will be burned. After that, in about a millennium, the earth will dissolve most of the resulting carbon dioxide into the oceans. But most models, even pessimistic ones, envision a thousand-year carbon dioxide pulse followed by glacially slow decay back to the pre-civilization situation.”

Oops! Wait. Do we want to return to “pre-civilization”? There must be more that Mr. Will missed.  Oh yes, Mr. Will would never quote this:

“Carbon dioxide from the human burning of fossil fuel is building up in the atmosphere at a frightening pace, enough to double the present concentration in a century. This buildup has the potential to raise average temperatures on the earth several degrees centigrade, enough to modify the weather and accelerate melting of the polar ice sheets. Governments around the world have become so alarmed at this prospect that they’ve taken significant, although ineffective, steps to slow the warming. “

Laughlin offers a reason for the ineffectiveness:

“Experts are little help in the constant struggle in this conversation to separate myth from reality, because they have the same difficulty, and routinely demonstrate it by talking past each other. Respected scientists warn of imminent energy shortages as geologic fuel supplies run out. Wall Street executives dismiss their predictions as myths and call for more drilling. Environmentalists describe the destruction to the earth from burning coal, oil, and natural gas. Economists ignore them and describe the danger to the earth of failing to burn coal, oil, and natural gas. “

He left out columnists like Mr. Will who help spread the myths and some of our politicians who  spread misinformation and  refuse to take timely action – while somehow finding time to take large donations from those who are profiting from the status quo.

Laughlin goes on:

”And the damage to the environment is exacerbated by the real problem, which is human population pressure generally – overharvesting, habitat destruction, pesticide abuse, species invasion, and so forth. Slowing man-made extinctions in a meaningful way would require drastically reducing the world’s human population. That is unlikely to happen”.

So, Robert Laughlin says that the Earth will likely get warmer, the oceans more acidic, and we will exhaust our fossil fuel supplies – and then the Earth will return to the equilibrium upset by man’s activities. Man’s effect will be but a mere blip in the geological history of the Earth. The Earth will not care if we return to pre-civilization or even if  man becomes extinct. The only lasting change we may leave in Geologic time may be the loss of the species we take with us. Still, shouldn’t we try to preserve civilization and as many species as we can? Especially, ours?

(c) 2010 J.C. Moore

(1) http://www.newsweek.com/2010/09/12/george-will-earth-doesn-t-care-what-is-done-to-it.html?gt1=43002

(2) http://www.theamericanscholar.org/what-the-earth-knows/

If Congress had acted to develop a sound energy policy and to curb pollution, the  EPA would not be forced to act in the matter. Regulation of carbon emissions would fall mainly on the coal industry and would favor a shift to petroleum and natural gas, both abundant in Oklahoma. However, all our  Republican Congressmen sat out the process and let the Democrats from coal producing states load up the cap-and-trade bill with perks for coal producing states. Some of  leaders see that limiting carbon emissions could be favorable to the Oklahoma economy, but apparently, our elected representatives have not caught on yet.

It is not just about the CO2 or climate change. Along with the 30 billion tons of CO2 we put into the air annually are large amounts of mercury, lead, cadmium, arsenic, sulfur oxides, nitrogen oxides, particulates, and radioactive isotopes of radon. Those end up in the air, the water, and the food chain. We are now finding mercury in fish and some places have limits on consumption. The oceans are now 20% more acidic and economically important fisheries are threatened. Whether we cap pollution, tax it, or strictly regulate it, something must be done and soon.

Geo-engineering would  have unintended consequences, and it would not address the underlying problem.  Burning fossil fuels puts 30 billion tons of CO2 into the air annually along with mercury, lead, cadmium, arsenic, nitrogen oxides, sulfur oxides, and radioactive isotopes. Much of those end up in the environment and in the food chain. Like carbonated water, the oceans are now 20% more acidic than a century ago (3) and the mercury level in tuna has gone up 30% since 1990 (4).

NASA’s data shows that the past decade has been the hottest on record and that the Earth is now 1.2° warmer than it was a century ago. Global warming, like a fever of 99.8, is a sign that something is wrong. The warming has not been caused by volcanoes, sunspots, changes in solar output, or cosmic rays from the stars, and it is not part of the natural cycle of nature. It’s caused by us and it is up to us to do something about it.

(1)   http://www.tulsaworld.com/opinion/article.aspx?subjectid=65&articleid=20091107_65_A17_Tebgni286922

(2)   http://www.tulsaworld.com/news/article.aspx?subjectid=11&articleid=20091109_15_A1_TlaWrd833051&archive=yes

(3)   http://observationsofanerd.blogspot.com/2009/10/climate-change-whats-worse-than-heat.html

(4)   http://soundwaves.usgs.gov/2009/08/