The W110 line on the left goes down through the Arizona SW area and on the right, the E40 line appears to cut through Moscow
THAT northern hemisphere section is about 1/3 of the northern hemisphere
THIS CHART shows a brief summaey of dates and number of above ground detonations by the two countries
Granted, some detonations accured in other parts of the globe, but the goodly portion happened in those two regions
Because of these facts, it is my hypothesis that we knocked ourselves off our axis a bit and THAT is why the weather is so screwy
Most of the detonations for both countries happened in a relatively small window ... Early sixties
Y'just can't pop that many pimples on mama Earth's face and not be affected
IMHO
That may be a good take on it, but I have one of my own. Way back in the dark ages of the '70's, I was in the concrete business. There, I learned that one gallon water equal 8.33 lbs. My hypothesis comes from China building that biggggg dam. It impounds so many gallons that it must have some effect on the earth. Think of placing weights on a wheel for balancing (or in this case, unbalancing!)
May be a combination of things like this massive engineering and what you propose!