Is Global Warming a Crisis?

• “No”

  

  “Computer Models Based on Faulty Assumptions ”

• No Objections Yet

Computer Models Based on Faulty Assumptions

National Center for Policy Analysis

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The complexity of the climate and the limitations of data and computer models mean projections of future climate change are unreliable at best.

• The data are flawed. There are major problems with data gathered from direct observation of air temperatures. Air temperature measurements do not accurately represent global patterns because of changes in the location, number, distribution and development surrounding observation sites over the 20th century.

• Climate models are limited. Disagreement exists among scientists about whether or not atmospheric aerosols help warm or cool the earth, but most climate models assume a warming effect. Another variable that climate models do not take into account is the effect of changes in solar radiation on the Earth's climate.

• Climate models do not make accurate predictions. In addition to problems with the data, computer models are limited by our incomplete understanding of how the Earth's climate responds to a variety of external forces. They are also limited by the speed and capabilities of contemporary computers. As a result, they do not accurately describe the current climate and have not been able to accurately describe the climate of the past 30 years.

In sum, the science does not support claims of drastic increases in global temperatures over the 21st century, nor does it support claims of human influence on weather events and other secondary effects of climate change.

Evidence

Link

Climate Science: Climate Change and Its Impacts

Next Argument

"No" NCPA

• Scientific Consensus Overstated
  9
• Climate Forecasts Inaccurate
  6
• Computer Models Based on Faulty Assumptions
  5
• Reports of Environmental Crisis from Global Warming Unfounded
  7
• There Are Benefits from Warmer Temperatures and CO2
  6
• Climate Adaptation Better than Mitigation
  5
• Climate Legislation Would Slow Economy Without Promised Benefits
  3
• Carbon Taxes Are the Best Policy for Greenhouse Gas Regulation
  3

"No" The Heartland Institute

• Global Warming Alarmism
  7
• There Is No Scientific Agreement
  7
• Most Scientists Don’t Believe Humans Threaten Earth's Climate
  7
• The Law of Unintended Consequences
  4
• The Politics of Global Warming
  6

"Yes" Sierra Club

• Science Is on Our Side
  6
• Global Warming’s Impact Is Already Happening
  6
• How Much Damage Will Be Done?
  6
• It’s an Economic Crisis If We Do Nothing
  5
• Even Bush, U.S. Military, British Petroleum, Wal-Mart Agree With Us
  4
• Who Are Today’s Skeptics?
  4

"Yes" NRDC

• The Debate is Over: It's Time For Action
  3
• A Little Historical Perspective
  3
• Global Warming is Changing Today’s World
  4
• For Some, Global Climate Change Means Survival
  2
• Corporations Are Part of the Answer
  2
• A Green Economy Means Job Opportunities
  3
• The Cost of Climate Change: We Need To Act Now
  3

Most Objections

• The Politics of Global Warming
  6
• Global Warming Alarmism
  7
• There Are Benefits from Warmer Temperatures and CO2
  6
• Reports of Environmental Crisis from Global Warming Unfounded
  7
• It’s an Economic Crisis If We Do Nothing
  5
• The Debate is Over: It's Time For Action
  3

Is Global Warming a Crisis?

• Yes
• No

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