A Warming Arctic Would Not Cause Increased Severe Weather or Temperature Extremes

Yet another ‘global warming’ scare proven to be just that – a scare.
What other ‘global warming’ catastrophic predictions, peddled by activist climate scientists are designed purely for fear-mongering and propaganda purposes.

Watts Up With That?

Guest essay by Chuck Wiese, Meteorologist, Weatherwise, Inc.

This essay is a critique Francis and Vavrus (2012), hereinafter FV (2012), by atmospheric scientists Jennifer Francis from Rutgers University and Steve Vavrus of the University of Wisconsin. Their paper can be downloaded here:

http://marine.rutgers.edu/~francis/pres/Francis_Vavrus_2012GL051000_pub.pdf

and an updated version here:

http://iopscience.iop.org/article/10.1088/1748-9326/10/1/014005/pdf

FV (2012) claims a measured decrease in the zonal or west to east wind component due to “arctic amplification” (AA) would increase jet stream meandering, increase the amplitude or “waviness” of the flow, and increase persistent long wave blocking patterns around the northern hemisphere. This, in turn, would increase severe weather, droughts, floods and temperature extremes.

To quote the authors directly:

“Two effects are identified that each contribute to a slower eastward progression of Rossby waves in the upper-level flow: 1) weakened zonal winds, and 2) increased wave amplitude. These effects are particularly evident in autumn and winter consistent with…

View original post 6,837 more words

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