Wallace concluded, "Unless global warming starts to accelerate at a rate FAR beyond what we've seen, it's going to be a long time before weather statistics change so much from the human signal that it would become clearly detectable in the presence of natural variability."<quoted text>
Thank you for an article from a researcher from my alma mater & here is an excerpt:
co-author Mike Wallace with the University of Washington.......
Sea ice has declined 2.6 percent per decade on average since the late 1970s, reports CTV News, but the area north of Greenland and the Canadian archipelago has been warming more quickly due to rain and wind patterns in the South Pacific — not man-made carbon dioxide emissions.
“We find that the most prominent annual mean surface and tropospheric warming in the Arctic since 1979 has occurred in northeastern Canada and Greenland,” the authors wrote.“In this region, much of the year-to-year temperature variability is associated with the leading mode of large-scale circulation variability in the North Atlantic, namely, the North Atlantic Oscillation.”
But the researchers show that the increased warming is from a “negative trend in the North Atlantic Oscillation” is in response to “anomalous Rossby wave-train activity originating in the tropical Pacific.”
Much(most?) Arctic warming occurs during the dark Arctic winter with the sun below the horizon. Prof. Wallace has studied Rossby waves since the '80's & has had one of the UW buildings named after him.
Good to see an article showing the tremendous energies being pumped into the Arctic from the south, which are enough to drive cold months of Arctic weather & show the chilling effects to Canada, the U.S., Mexico, Central America, & other countries, even to far southern China, India, Iran, Iraq, & Northern Africa. Prof. Wallace was one of the first professors sending up signals about man-made GHGs in the 70's.
Tho the article emphasized Wallace studies from the late 70's & early 80's, it must be noted that warming in the Arctic has been shown since at least the latter 1950's. & Arctic heating really poured it on these past several years & especially this past late 2013 fall & & 13-14 winter.
Don't make a mountain out of a mole hill.