A recent paper makes the extraordinary claim that climate change has been making North American winters colder and snowier. Specifically via a mechanism I have some history with, the polar vortex…
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In this video I talk about Cohen et al (2021), a recent paper linking climate change in the Arctic to changes in the stratospheric polar vortex, which itself causes changes in winter weather. As I studied this mechanism in some detail I thought that I knew what to expect, but it turns out that via machine learning techniques, a new way in which the polar vortex influences surface weather has been discovered!
Video about my thesis: https://www.youtube.com/watch?v=BkvJd_3thg4&t=94s
(2) For an in-depth review of SSWs, see https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020RG000708
(4) Quite how many events have happened (and when) depends on which criteria and which dataset you use. This list is from ERA/ERA-Interim data, via https://essd.copernicus.org/articles/9/63/2017/essd-9-63-2017.pdf
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How climate change is making winters colder in America and Canada, via the stratospheric polar vortex. Arctic sea ice melt has been found to cause changes in the polar vortex, which is making winters colder in North America. Amazing what machine learning in science can accomplish! Finally my PhD becomes useful, and I can draw on my PhD thesis again.
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