Lee Gerhard is a geologist and a reviewer for the Intergovernmental Panel on Climate Change (IPCC). Here’s what he has to say about greenhouse gases, CO2 concentrations and effect, Arctic and Antarctic ice, polar bears, human influence on global temperature and so on (from Icecap):

It is crucial that scientists are factually accurate when they do speak out, that they ignore media hype and maintain a clinical detachment from social or other agendas. There are facts and data that are ignored in the maelstrom of social and economic agendas swirling about Copenhagen. Greenhouse gases and their effects are well-known. Here are some of things we know:

• The most effective greenhouse gas is water vapor, comprising approximately 95 percent of the total greenhouse effect.

• Carbon dioxide concentration has been continually rising for nearly 100 years. It continues to rise, but carbon dioxide concentrations at present are near the lowest in geologic history.

• Temperature change correlation with carbon dioxide levels is not statistically significant.

• There are no data that definitively relate carbon dioxide levels to temperature changes.

• The greenhouse effect of carbon dioxide logarithmically declines with increasing concentration. At present levels, any additional carbon dioxide can have very little effect.

We also know a lot about Earth temperature changes:

• Global temperature changes naturally all of the time, in both directions and at many scales of intensity.

• The warmest year in the U.S. in the last century was 1934, not 1998. The U.S. has the best and most extensive temperature records in the world.

• Global temperature peaked in 1998 on the current 60-80 year cycle, and has been episodically declining ever since. This cooling absolutely falsifies claims that human carbon dioxide emissions are a controlling factor in Earth temperature.

• Voluminous historic records demonstrate the Medieval Climate Optimum (MCO) was real and that the “hockey stick” graphic that attempted to deny that fact was at best bad science. The MCO was considerably warmer than the end of the 20th century.

• During the last 100 years, temperature has both risen and fallen, including the present cooling. All the changes in temperature of the last 100 years are in normal historic ranges, both in absolute value and, most importantly, rate of change.

Contrary to many public statements:

• Effects of temperature change are absolutely independent of the cause of the temperature change.

• Global hurricane, cyclonic and major storm activity is near 30-year lows. Any increase in cost of damages by storms is a product of increasing population density in vulnerable areas such as along the shores and property value inflation, not due to any increase in frequency or severity of storms.

• Polar bears have survived and thrived over periods of extreme cold and extreme warmth over hundreds of thousands of years extremes far in excess of modern temperature changes.

• The 2009 minimum Arctic ice extent was significantly larger than the previous two years. The 2009 Antarctic maximum ice extent was significantly above the 30-year average. There are only 30 years of records.

• Rate and magnitude of sea level changes observed during the last 100 years are within normal historical ranges. Current sea level rise is tiny and, at most, justifies a prediction of perhaps ten centimeters rise in this century.

The present climate debate is a classic conflict between data and computer programs. The computer programs are the source of concern over climate change and global warming, not the data. Data are measurements. Computer programs are artificial constructs.

Public announcements use a great deal of hyperbole and inflammatory language. For instance, the word “ever” is misused by media and in public pronouncements alike. It does not mean “in the last 20 years,” or “the last 70 years.” “Ever” means the last 4.5 billion years.

For example, some argue that the Arctic is melting, with the warmest-ever temperatures. One should ask, “How long is ever?” The answer is since 1979. And then ask, “Is it still warming?” The answer is unequivocally “No.” Earth temperatures are cooling. Similarly, the word “unprecedented” cannot be legitimately used to describe any climate change in the last 8,000 years. …

I have been a reviewer of the last two IPCC reports, one of the several thousand scientists who purportedly are supporters of the IPCC view that humans control global temperature. Nothing could be further from the truth. Many of us try to bring better and more current science to the IPCC, but we usually fail. Recently we found out why. The whistleblower release of e-mails and files from the Climate Research Unit at East Anglia University has demonstrated scientific malfeasance and a sickening violation of scientific ethics. …

Lawrence Solomon writing for the Financial Post exposes fibs and crimes in the global warming racket:

This week, the doomsters were embarrassed to learn, once again, that the planet was not in grave peril. Antarctica, their greatest candidate for catastrophe, was not melting at an ever-faster rate, according to a report in Geophysical Research Letters, but at the slowest rate in 30 years. To add to their frustration, they couldn’t even lash out at the lead author, Marco Tedesco of the Earth and Atmospheric Sciences Department of City College of New York — the doomsters had praised his previous reports showing high rates of Antarctic melt.

The latest news from the Arctic — delivered daily via satellite — is no better. Two years ago with the Arctic ice in rapid retreat, the doomsters, convinced of the coming of an ice-free Arctic, could scarcely contain themselves. Now, with the Arctic ice in rapid return, their anticipation of disaster seems more a cruel hoax of Nature. …

The red faces aren’t all caused by Nature’s refusal to cooperate in Earth’s demise. The clean carbon folks have recently discovered that they’ve been in bed with organized crime. Scotland Yard and Europol, among numerous other law enforcement agencies across Europe, are hot on the trail of scam artists believed to have made off with £1-billion by illicitly trading carbon credits. In Australia, authorities are investigating claims that a supplier to Carbon Planet, a carbon trading business, has been using fake carbon trading certificates to persuade forest dwellers in Papua New Guinea to sign over the rights to their forests under a UN scheme called REDD, for “Reduced Emissions from Deforestation and Degradation.’’ Australia’s REDD-faced Climate Change Minister Penny Wong may now be unable to tout Carbon Planet — about to list on the Australian stock exchange on the promise of A$100-million in REDD assets — at the upcoming climate change meetings in Copenhagen. Other dodgy carbon dealings led to the suspension of the UK branch of SGS, one of the world’s largest clean energy auditors, and of the Norwegian certification company DNV.

If universities could blush, Stanford would be setting the skies ablaze with its latest embarrassment, an attempt to censor a global warming documentary about to be released that had filmed one of its professors, global warming catastrophist Stephen Schneider. “You are prohibited from using any of the Stanford footage you shot, including your interview of Professor Stephen Schneider,” Stanford demanded in a letter. “Professor Schneider likewise has requested that I inform you that he has withdrawn any permission for you to use his name, likeness or interview in connection with any film project you may undertake.”

What caused Stanford and Schneider to go ballistic over the release of the documentary, Not Evil Just Wrong, by independent Irish filmmaker Phelim McAleer? He asked Schneider about his many predictions of global cooling catastrophe in the 1970s. …

 From DailyTech:

Rapid Rebound Brings Ice Back to Levels from the 1980s.

An abnormally cool Arctic is seeing dramatic changes to ice levels.  In sharp contrast to the rapid melting seen last year, the amount of global sea ice has rebounded sharply and is now growing rapidly. The total amount of ice, which set a record low value last year, grew in October at the fastest pace since record-keeping began in 1979.