Cli­mate report con­tra­dicts Smith

Austin American-Statesman Sunday - - VIEWPOINTS -

Re: Sept. 20th let­ter to the ed­i­tor, “Wrong to link Har­vey to cli­mate change” and Sept. 9 com­men­tary, “My eighth-graders know cli­ma­tol­ogy bet­ter than con­gress­men.”

U.S. Rep. La­mar Smith’s let­ter to the ed­i­tor just con­firms the va­lid­ity of his crit­ics in the op-ed “My eighth-graders know cli­ma­tol­ogy bet­ter than con­gress­men.” La­mar re­ferred to the In­ter­gov­ern­men­tal Panel on Cli­mate Change as hav­ing “low con­fi­dence” that storms are in­creas­ing in fre­quency or in­ten­sity and that “sci­en­tists con­cerned with un­cov­er­ing the truth know to ex­am­ine trends over time.”

The IPCC fifth as­sess­ment report states:

“Warm­ing of the cli­mate sys­tem is un­equiv­o­cal, and since the 1950s, many of the ob­served changes are un­prece­dented over decades to mil­len­nia.”

“At­mo­spheric con­cen­tra­tions of car­bon diox­ide, meth­ane, and ni­trous ox­ide have in­creased to lev­els un­prece­dented in at least the last 800,000 years.”

Hu­man in­flu­ence on the cli­mate sys­tem is clear. It is ex­tremely likely (95100 per­cent prob­a­bil­ity) that hu­man in­flu­ence was the dom­i­nant cause of global warm­ing be­tween 1951-2010

This is what sci­en­tists found by ex­am­in­ing trends over time.

WAL­TER MAGAÑA, AUSTIN

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