Joe D’Aleo finds strong evidence for the Sun’s role in the US winter weather at the WeatherBell
We have noted that the sun plays a role in climate and weather in many ways. When the sun is more active near solar maxima, the sun is slightly brighter and irradiance increases – 0.1% on most recent cycles, more in cycle 23.
There is also up to 10% more UV radiation which produces ozone chemistry related warming in low and middle latitudes high up in the atmosphere that works it’s way down to the mid-troposhpere as shown in data by Karin Labitzke in numerous papers in recent decades and in models by Hansen’s star climate modeller, Drew Shindell. Geomagnetic storms can affect high latitude patterns and blocking.
Diffusion of galactic cosmic rays which play a role in low water cloudiness through ion mediated nucleation can produce less low cloudiness (the Svensmark effect).
You can read the whole article here, but this is the graphic that caught my attention. Note the winter cooling over the last decade and the biggest drop in temperatures were in America’s breadbasket.
As the winters cool, the probability of late spring killing frost and early fall frosts increase, shortening the growing season. I am working on a growing season base line, with a way to measure the progression of killing spring frosts into the growing season. Or, backing off giving farmers a longer growing season. Stay tuned, there is more to come on spring killing frosts.