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Ken Caldeira

Senior Scientist, Carnegie Institution for Science

Expertise: Climate modeling, Ocean acidification, Long-term Geochemical cycles

Financial Post commentary jumps to unsupported conclusions in claiming “climate change isn’t causing extreme weather”

“This article is misleading since it confuses changes in climate change impacts with changes in climate and weather extremes and it subjectively selects examples that support its message.
There is clear scientific evidence that many weather and climate extreme events increase in intensity and frequency due to anthropogenic climate change. Munich Re, for example, publishes data on global major extreme events in its annual reports.”

Breitbart article baselessly claims a study of past climate invalidates human-caused climate change

“By the reasoning of this article, if a rock rolled down a hill three million years ago, no human can be responsible for rolling a rock down a hill today. The fallaciousness of this reasoning is astounding.
It is hard to imagine that a well-intentioned person can so profoundly misunderstand the science. Assuming the author is acting in good faith, this article provides evidence that motivated reasoning can produce results that appear delusional to well-informed people.”

Analysis of "Ocean acidification: yet another wobbly pillar of climate alarmism"

The scientists who have analyzed the article show that it contains significant inaccuracies, notably for its core assumptions, and misrepresents scientific studies and scientists it cites to make its point. Reviewers also note that the article knocks down strawman arguments that do not represent the state of scientific knowledge (scientists do not claim the ocean will become a “giant acid bath”).

Analysis of "James Lovelock: ‘Before the end of this century, robots will have taken over’"

“Extraordinary claims demand extraordinary evidence, and Lovelock has not even come up to the standards of providing what the scientific community would consider to be ordinary evidence. The journalist did not balance Lovelock’s statements with a set of clear statements saying that the vast majority of informed climate scientists (as, for example, represented by the IPCC reports) have reached consensus on conclusions that are diametrically opposed to what Lovelock is saying, and that the IPCC scientists have backed up their statements with a wealth of empirical data, whereas Lovelock is largely opining without providing any substantive evidence to support his rather extraordinary claims.”

Analysis of "Flooding of Coast, Caused by Global Warming, Has Already Begun"

“The theory of sea-level rise and flood problems is pretty well understood — this makes the point that this theory is also happening now and can only be expected to get worse — sea levels have been rising on the US east coast for the last 150 years or more and even if current trends simply continue, impacts will continue to grow. As the article states, we actually expect a significant acceleration of sea-level rise in the coming decades meaning the impacts will grow more rapidly.”

Analysis of "What science can tell us about the links between global warming and massive heat waves"

“This is a well-written article that provides a good overall discussion around the connection between climate change and the ongoing US heat wave. In the absence of a specific event attribution study the role of climate change in this event can’t be quantified, but Chris Mooney provides an insightful overview of the role of climate change in heat events generally.”

Analysis of "Scientists warn of 'global climate emergency' over shifting jet stream"

“This article makes little sense. It uses scientific jargon, such as in the last paragraph, to make it sound “scientific”, but uses it so loosely that it has no meaning. I do not see any logic behind these wild claims, there are no connections with established research, and there is no discussion of statistical certainty. Moreover, wild attributions to anthropogenic climate change are made without any backing.”

Analysis of "Thanks to climate change, the Arctic is turning green"

“The article reports about recent evidence that terrestrial ecosystems are ‘greening’ in response to human activities, principally the increasing atmospheric CO2 concentration. The author presents this ‘greening’ as a new finding while annual global carbon budgets have reported that about 25% of the fossil-fuel emissions have been taken up by the biosphere since the 1960s. Nothing is fundamentally wrong in the article but it is organized in a somewhat misleading way”

Analysis of "Great Barrier Reef may perish by 2030s…"

This Mashable article reports on new preliminary research that finds the ongoing coral bleaching event in the Pacific is mainly due to human-caused global warming, and that if global warming proceeds as currently expected, “large parts” of the Great Barrier Reef could die by the mid-2030s. Six scientists have reviewed the article and conclude that it is overall accurate and in agreement with the science.

Analysis of "Scientists say human greenhouse gas emissions have canceled the next ice age"

“The article presents an accurate account of recently published research which suggests that human-induced global warming will delay the onset of the next ice age by 50,000 years. The research supports the findings of several studies published over the past 15 years, and is consistent with the scientific consensus that human activity is changing the climate with very long-term consequences.”