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Given that the solar magnetic dynamo has been in a slump as of late, and we’ve experienced a very low U.S. tornado season, one wonders if the low tornado numbers are partially related to lack of perturbations induced in the jet stream, which guide storm tracks and fronts.
The existence of a meteorological response in the polar regions to fluctuations in the interplanetary magnetic field (IMF) component By is well established. More controversially, there is evidence to suggest that this Sun–weather coupling occurs via the global atmospheric electric circuit. Consequently, it has been assumed that the effect is maximized at high latitudes and is negligible at low and mid-latitudes, because the perturbation by the IMF is concentrated in the polar regions.
originally posted by: bbracken677
a reply to: FyreByrd
But should we? Can we?
Is it hubris to believe that we have the ability to affect climate change in a "positive" manner?
Published Wednesday in the journal Climate Dynamics, Professor James Elsner writes that though tornadoes are forming fewer days per year, they are forming at a greater density and strength than ever before. So, for example, instead of one or two forming on a given day in an area, there might be three or four occurring.
"We may be less threatened by tornadoes on a day-to-day basis, but when they do come, they come like there's no tomorrow," Elsner said.
Elsner, an expert in climate and weather trends, said in the past, many researchers dismissed the impact of climate change on tornadoes because there was no distinct pattern in the number of tornado days per year. In 1971, there were 187 tornado days, but in 2013 there were only 79 days with tornadoes.
The long-term weather question is whether or not we'll see more or less of these "classic" looks in our changing meteorological environment. It turns out that of all the weather phenomena, from droughts to hurricanes, tornadoes are the most complex to answer from a broader atmospheric trends point of view. The reason is that a warming world affects the factors that lead to tornadoes in different ways.
Climate change is supposed, among other things, to bring warmer and moister air to earth. That, of course, would lead to more severe thunderstorms and probably more tornadoes. The issue is that global warming is also forecast to bring about less wind shear. This would allow hurricanes to form more easily, but it also would make it much harder for tornadoes to get the full about lift and instability that allow for your usual thunderstorm to grow in height and become a fully-fledged tornado. Statistics over the past 50 years bear this out, as we've seen warmer and more moist air as well as less wind shear.
Meteorological studies differ on whether or not the warmer and moister air can overcome a lack of wind shear in creating more tornadoes in the far future. In the immediate past, the jet stream, possibly because of climate change, has been quite volatile. Some years it has dug south to allow maximum tornado activity in the middle of the country, while other years it has stayed to the north.
In his October 17, 1972 Statement on Veto, President Nixon complained about the ”staggering, budget wrecking $24 billion” provided for in the bill, and “hope[d], with millions of taxpayers, that at least one third plus one of the members in one House will be responsible enough to vote for the public interest and sustain this veto.”