bripat9643
Diamond Member
- Apr 1, 2011
- 170,170
- 47,318
- 2,180
Or here?
[Q:] I know this kind of extreme weather is part of the territory in the middle of the country, but is climate change going to make such extreme weather more likely or more powerful?
[A: Trenberth] Of course, tornadoes are very much a weather phenomenon. They come from certain thunderstorms, usually supercell thunderstorms that are in a wind shear environment that promotes rotation. That environment is most common in spring across the U.S. when the storm track is just the right distance from the Gulf [of Mexico] and other sources of moisture.
The main climate change connection is via the basic instability of the low-level air that creates the convection and thunderstorms in the first place. Warmer and moister conditions are the key for unstable air. The oceans are warmer because of climate change.
The climate change effect is probably only a 5 to 10 percent effect in terms of the instability and subsequent rainfall, but it translates into up to a 33 percent effect in terms of damage. (It is highly nonlinear, for 10 percent it is 1.1 to the power of three = 1.33.) So there is a chain of events, and climate change mainly affects the first link: the basic buoyancy of the air is increased. Whether that translates into a supercell storm and one with a tornado is largely chance weather.
What about it? None of those claims are proven.
None of the proof of those claims is known by you. Why would you expect it to be?
If you got the proof, then post it.