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Climate Depot | 6/13/2019 | Marc Morano
Caris (Posted by) Level 3


Regarding storm surge, our expectation is that a widespread worsening of total inundation levels during storms is occurring due to the global mean sea level rise associated with anthropogenic warming, assuming all other factors equal, although we note that no TC climate change signal has been convincingly detected in sea level extremes data. To date, there is not convincing evidence of a detectable anthropogenic influence on hurricane precipitation rates, in contrast to the case for extreme precipitation in general, where some anthropogenic influence has been detected.

The relatively low confidence in TC change detection results from several factors, including: observational limitations, the smallness of the expected human-caused change (signal) relative to the expected natural variability (noise), or the lack of confident estimates of the expected signal and noise levels.”

JC - Comments - Paper - Approach - Annals

JC comments: This paper illustrates an approach that is very unusual in the annals of climate change assessments. The sea level rise community is also using expert elicitation (e.g. Bamber et al.). Expert elicitation and and expert structured judgment is much preferred over ‘consensus seeking’. The Knutson et al. paper is distinguished by clearly explaining the evidence and and arguments that the individual scientists are considering, and in the Supplementary Information also showing individual responses.

Experts disagree on most aspects of climate change. Why do they disagree? I have covered this extensively before, the main reasons are summarized as:

Reasons - Disagreement - Issue - Need - Knutson

The specific reasons for disagreement on a given issue need to be clarified, which the Knutson paper does. Distinguishing between Type I and II errors is also useful, which clearly identifies the speculative issues as scientifically informed speculation.

ATTP has a joint blog post with philosopher Eric Winsberg entitled Extreme weather event attribution.

Eric - Naomi - Oreskes - Elisabeth - Lloyd

Eric has just published, together with Naomi Oreskes and Elisabeth Lloyd, a paper called Severe Weather Event Attribution: Why values won’t go away. The paper...
(Excerpt) Read more at: Climate Depot
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