Jim Steele examines natural climate change, species extinctions, species range changes, environmental stewardship. Here he presents the transcript from Dr Judith Curry's statement from her debate along with Dr. Patrick Moore versus Michael Mann and Admiral Titley.
Agreement/Disagreement:
There is widespread agreement on these basic tenets:
- Surface temperatures have increased since 1880.
- Humans are adding carbon dioxide to the atmosphere.
- Carbon dioxide and other greenhouse gases have a warming effect on the planet.
However, there is substantial disagreement about the issues of greatest consequence:
- Whether the recent warming has been dominated by human causes.
- How much the planet will warm in the 21st Century.
- Whether warming is ‘dangerous’.
- How we should respond to the warming.
I have bolded the two issues that are the focus of this conversation. Now there is nothing wrong or bad about scientific disagreement. In fact, the scientific process thrives in the face of disagreement, which motivates research in new directions.
Disagreement: Causes of Climate Change
One perspective is that the climate is stable and that there are changes in response to changes in atmospheric CO2. In other words, carbon dioxide as the climate control knob. It’s a simple and seductive idea. However some scientists think that this is a misleading oversimplification. They regard climate as a complex nonlinear dynamical system, with no simple cause and effect. Climate can shift naturally in unexpected ways, owing to natural internal variability associated with large-scale ocean circulations.
Read on ......
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