Half of 21st Century Warming Due to El Nino

By Roy W. Spencer – Re-Blogged From http://www.drroyspencer.com

A major uncertainty in figuring out how much of recent warming has been human-caused is knowing how much nature has caused. The IPCC is quite sure that nature is responsible for less than half of the warming since the mid-1900s, but politicians, activists, and various green energy pundits go even further, behaving as if warming is 100% human-caused.

The fact is we really don’t understand the causes of natural climate change on the time scale of an individual lifetime, although theories abound. For example, there is plenty of evidence that the Little Ice Age was real, and so some of the warming over the last 150 years (especially prior to 1940) was natural — but how much?

The answer makes as huge difference to energy policy. If global warming is only 50% as large as is predicted by the IPCC (which would make it only 20% of the problem portrayed by the media and politicians), then the immense cost of renewable energy can be avoided until we have new cost-competitive energy technologies.

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Weekly Climate and Energy News Roundup #165

By Ken Haapala, President, Science and Environmental Policy Project (SEPP)

A New Byrd-Hagel Resolution? As discussed in an article by Fred Singer, in 1997 the U.S. Senate passed by unanimous vote the Byrd-Hagel resolution against a climate protocol being considered by UN Framework Convention on Climate Change (UNFCCC) and by the Clinton-Gore Administration. The protocol in doubt became the unsuccessful Kyoto Protocol which extended the life of the UNFCCC and committed the parties to reduce emissions of carbon dioxide (CO2). Although technically signed by the US government, the Clinton-Gore administration did not submit the Kyoto Protocol to the Senate for ratification, as required by the Constitution to be binding on the US, in light of the opposition expressed in the Byrd-Hagel resolution.

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