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Tuesday, January 15, 2008

COMMON MISCONCEPTIONS ABOUT GLOBAL WARMING

Myths and Facts

MYTH 1: Global temperatures are rising at a rapid, unprecedented rate.

FACT: Accurate satellite, balloon and mountain top observations made over the last three decades have not shown any significant change in the long term rate of increase in global temperatures. Average ground station readings do show a mild warming of 0.6 to 0.8C over the last 100 years, which is well within the natural variations recorded in the last millennium. The ground station network suffers from an uneven distribution across the globe; the stations are preferentially located in growing urban and industrial areas ("heat islands"), which show substantially higher readings than adjacent rural areas ("land use effects").

There has been no catastrophic warming recorded.

MYTH 2: The "hockey stick" graph proves that the earth has experienced a steady, very gradual temperature decrease for 1000 years, then recently began a sudden increase.

FACT: Significant changes in climate have continually occurred throughout geologic time. For instance, the Medieval Warm Period, from around 1000 to1200 AD (when the Vikings farmed on Greenland) was followed by a period known as the Little Ice Age. Since the end of the 17th Century the "average global temperature" has been rising at the low steady rate mentioned above; although from 1940 – 1970 temperatures actually dropped, leading to a Global Cooling scare.

The "hockey stick", a poster boy of both the UN's IPCC and Canada's Environment Department, ignores historical recorded climatic swings, and has now also been proven to be flawed and statistically unreliable as well. It is a computer construct and a faulty one at that.

MYTH 3: Human produced carbon dioxide has increased over the last 100 years, adding to the Greenhouse effect, thus warming the earth.

FACT: Carbon dioxide levels have indeed changed for various reasons, human and otherwise, just as they have throughout geologic time. Since the beginning of the industrial revolution, the CO2 content of the atmosphere has increased. The RATE of growth during this period has also increased from about 0.2% per year to the present rate of about 0.4% per year,which growth rate has now been constant for the past 25 years. However, there is no proof that CO2 is the main driver of global warming. As measured in ice cores dated over many thousands of years, CO2 levels move up and down AFTER the temperature has done so, and thus are the RESULT OF, NOT THE CAUSE of warming. Geological field work in recent sediments confirms this causal relationship. There is solid evidence that, as temperatures move up and down naturally and cyclically through solar radiation, orbital and galactic influences, the warming surface layers of the earth's oceans expel more CO2 as a result.

MYTH 4: CO2 is the most common greenhouse gas.

FACT: Greenhouse gases form about 3 % of the atmosphere by volume. They consist of varying amounts, (about 97%) of water vapour and clouds, with the remainder being gases like CO2, CH4, Ozone and N2O, of which carbon dioxide is the largest amount. Hence, CO2 constitutes about 0.037% of the atmosphere. While the minor gases are more effective as "greenhouse agents" than water vapour and clouds, the latter are overwhelming the effect by their sheer volume and – in the end – are thought to be responsible for 60% of the "Greenhouse effect".

Those attributing climate change to CO2 rarely mention this important fact.

MYTH 5: Computer models verify that CO2 increases will cause significant global warming.

FACT: The computer models assume that CO2 is the primary climate driver, and that the Sun has an insignificant effect on climate. You cannot use the output of a model to verify or prove its initial assumption - that is circular reasoning and is illogical. Computer models can be made to roughly match the 20th century temperature rise by adjusting many input parameters and using strong positive feedbacks. They do not "prove" anything. Also, computer models predicting global warming are incapable of properly including the effects of the sun, cosmic rays and the clouds. The sun is a major cause of temperature variation on the earth surface as its received radiation changes all the time, This happens largely in cyclical fashion. The number and the lengths in time of sunspots can be correlated very closely with average temperatures on earth, e.g. the Little Ice Age and the Medieval Warm Period. Varying intensity of solar heat radiation affects the surface temperature of the oceans and the currents. Warmer ocean water expels gases, some of which are CO2. Solar radiation interferes with the cosmic ray flux, thus influencing the amount ionized nuclei which control cloud cover.

MYTH 6: The UN proved that man–made CO2 causes global warming.

FACT: In a 1996 report by the UN on global warming, two statements were deleted from the final draft. Here they are: 1) “None of the studies cited above has shown clear evidence that we can attribute the observed climate changes to increases in greenhouse gases.”2) “No study to date has positively attributed all or part of the climate change to man–made causes”

To the present day there is still no scientific proof that man-made CO2 causes significant global warming.

MYTH 7: CO2 is a pollutant.FACT: This is absolutely not true. Nitrogen forms 80% of our atmosphere. We could not live in 100% nitrogen either. Carbon dioxide is no more a pollutant than nitrogen is. CO2 is essential to life on earth. It is necessary for plant growth since increased CO2 intake as a result of increased atmospheric concentration causes many trees and other plants to grow more vigorously. Unfortunately, the Canadian Government has included CO2 with a number of truly toxic and noxious substances listed by the Environmental Protection Act, only as their means to politically control it.

MYTH 8: Global warming will cause more storms and other weather extremes.

FACT: There is no scientific or statistical evidence whatsoever that supports such claims on a global scale. Regional variations may occur. Growing insurance and infrastructure repair costs, particularly in coastal areas, are sometimes claimed to be the result of increasing frequency and severity of storms, whereas in reality they are a function of increasing population density, escalating development value, and ever more media reporting.

MYTH 9: Receding glaciers and the calving of ice shelves are proof of global warming.

FACT: Glaciers have been receding and growing cyclically for hundreds of years. Recent glacier melting is a consequence of coming out of the very cool period of the Little Ice Age. Ice shelves have been breaking off for centuries. Scientists know of at least 33 periods of glaciers growing and then retreating. It’s normal. Besides, glacier's health is dependent as much on precipitation as on temperature.

MYTH 10: The earth’s poles are warming; polar ice caps are breaking up and melting and the sea level rising.

FACT: The earth is variable. The western Arctic may be getting somewhat warmer, due to unrelated cyclic events in the Pacific Ocean, but the Eastern Arctic and Greenland are getting colder. The small Palmer Peninsula of Antarctica is getting warmer, while the main Antarctic continent is actually cooling. Ice thicknesses are increasing both on Greenland and in Antarctica.
Sea level monitoring in the Pacific (Tuvalu) and Indian Oceans (Maldives) has shown no sign of any sea level rise.

More FACTS and MYTHS? See what Professor deFreitas has to say. Click here.

4 comments:

Anonymous said...

When you do a Google search for “Climate change,” one of the top results that always appears is the Wikipedia entry for this subject. Wikipedia is a free online encyclopedia that anyone can edit. Unfortunately, most of the people that sign up to edit this article are pro-global warming evangelists who exhibit a clear pro-global warming agenda. This means that everyone from school children to the media are getting this highly biased view of climate change, when they research this topic via a Google search. Fortunately, however, ANYONE can sign up on Wikipedia free of charge in less than one minute and edit this article. I would encourage everyone to sign up and contribute to this article, to ensure it presents the correct view of global warming. Simply go to: http://en.wikipedia.org/wiki/Climate_change (or just go to Google and search “Climate Change” to find the Wikipedia entry right near the top) and start editing! Then you can help to provide the proper balance that is needed in this highly biased article.

-S. Khratzinski

JLain said...

Nice list of facts. Wish more people would learn things like this before jumping on the global warming bandwagon.

Joe
http://www.warmingscaretactics.com

Anonymous said...

I cannot believe this blog even exists!The propaganda is ridiculous! Yes, global warming is natural but the rate at which it is happening will cause massive destruction to the world and civilization. What you call "mild" warming of about 0.5degree is actually a drastic change in which species can not survive the increase due to their range of tolerance. If the range took over a period of thousands of years species could survive and adapt. However, this is not possible when the change is on a small scale of time, even 100yrs. Articles that are peer reviewed by scientists do NOT dispute the FACT of global warming! I think you need to become climate literate before publishing what you have called the "myths" !!!!

Mike Venetian said...

Dear Mr. or Mrs. Anonymous,

I direct you to the report of 31,000 scientists that have signed the petition proving that climate change, if any, is not a result of mankind.

My Rant

The claim that climate change is direct result of man's energy consumption is simply unproven and politically motivated. While they propound lies that certain lightbulbs or cars will destroy the earth and raise ocean levels as much as 20 feet within the next century, fascists, like Al Gore, fly around in their Gulfstream jets and live in homes that use 22 times the energy of an average American's home! Their propaganda is outrageous and potentially catastrophic for the economies of United States, the developed world and developing world.

The proof of global warming or man's influence on climate change is not settled science. Just consider the source of the big lie: the proselytizing hypocritical high priest of the pagan environmental religion Al Gore or the other Kool-Aid drinking climateers from the left such as Learjet liberals, Hollywood high school drop-outs, billonaire elitists, the left-leaning mainstream media, the United Nations, academia, environmental radicals, socialists, other anti-capitalists and so called "researchers", "experts" and/or "scientists" whose paychecks depend upon the apparent existence of the "issue".

United States energy conservation and independence is a worthy goal that should be supported by Republicans, the Democrat Party, true Democrats, Independents and environmentalists. Energy independence is a major national security concern. However, lying to our people, implementing the cap & trade boondoggle which will crush our economy or doing anything that will cause the United States to transfer an portion of its sovereignty to the United Nations is idiotic. Not in my name!
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