Judith Curry is Professor, School of Earth and Atmospheric Sciences, Georgia Institute of Technology
Stripped of dogma and green evangelism, the key issue is this: the inadequacies of current policies based on emissions reduction are leaving the real societal consequences of climate change and extreme weather events largely unaddressed, whether caused by humans or natural variability.
Noted climate scientist Judith Curry neatly set out the weaknesses of the human-caused catastrophic global warming excitement when she testified this month before a US House of Representatives committee. Her written submission is here , but her verbal introduction is below:
THE central issue in the scientific debate on climate change is the extent to which the recent (and future) warming is caused by human-caused greenhouse gas emissions versus natural climate variability that are caused by variations from the sun, volcanic eruptions, and large-scale ocean circulations.
Recent data and research supports the importance of natural climate variability and calls into question the conclusion that humans are the dominant cause of recent climate change. This includes
The slow down in global warming since 1998
Reduced estimates of the sensitivity of climate to carbon dioxide
Climate models that are predicting much more warming than has been observed so far in the 21st century
While there are substantial uncertainties in our understanding of climate change, it is clear that humans are influencing climate in the direction of warming. However this simple truth is essentially meaningless in itself in terms of alarm, and does not mandate a particular policy response. We have made some questionable choices in defining the problem of climate change and its solution: