Author: Dr. James Hansen

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Dr James Hansen: It’s all hunky-dory, but… Regional climate change and national responsibilities 2

Well-meaning souls, (including my friend Michael Shellenberger) rightfully concerned about the effect of “gloom-and-doom” talk on young people, say that everything is hunky-dory, climate change impacts are exaggerated (they often are) and climate change is not a serious threat (unfortunately, it is). By Dr James Hansen and Makiko Sato Let’s look at reality, real data […]

July 7th

Dr. James Hansen: The monarch butterflies return

Last summer the population of monarch butterflies in the Northeast United States seemed to be greater than it had been in the past decade. This was consistent with the fact that the number of butterflies making it to Mexico for the 2018-19 winter was the highest since 2006-07 (see graph). Unfortunately, only half as many […]

April 29th

Dr James Hansen: Bending the curves on coronavirus and climate change

Coronavirus experience has educated the public about scientific concepts that are relevant to climate change.  ‘Delayed response’ – days and weeks for Coronavirus, decades and centuries for climate change –  makes both problems difficult and dangerous.  Delayed response, in a system that has amplifying feedbacks, can lead to exponential response that is difficult to control. […]

April 16th

James Hanson: Climate Models vs. Real World

Climate models are most useful when used so as to help us understand climate mechanisms in the real world, and thus improve our ability to understand ongoing and future climate change. Comparison of climate model predictions against real world outcome provides one way to gain improved understanding. By Dr. James Hansen There is recent discussion […]

February 14th