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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: Eric who wrote (76967)

5/18/2017 6:16:07 PM

From: Brumar89

Read Replies (1) | Respond to of 86363

Is Global Warming Data Reliable?

For pundits and the press, it's a given that increases in greenhouse gas emissions have caused an observed increase in global temperatures since the early twentieth century. There are, however, several premises underneath that assumption that don't hold up to scrutiny, according to Independent Institute Research Fellow S. Fred Singer, in a recent op-ed for American Thinker. One goes to the reliability of the data.

Not all data sets are created equal. The apparent warming interval of 1910 to 1942 is based on proxy data from many sources (tree rings, ice cores, etc.) that are consistent with one another, whereas the apparent warming interval of 1977 to 2000 comes from data sources (weather stations, sea temperatures, nighttime marine air-temperatures, microwave sounding units, etc.) that are often inconsistent with one another, according to Singer. The "warming" believed to have occurred during this second interval is therefore likely an erroneous by-product of the data-gathering process.

Consider temperature-gathering at airports. The number of weather stations at airports fell significantly from 1970 to 1995, but the number of weather stations overall fell by even more. As a result, the relative weight of data gathered at airports rose significantly, from 35 percent to 80 percent of all weather stations. During this period, air traffic increased "about 5 percent per year worldwide," Singer writes. Consequently, the "observed" trend of warming from 1977 to 2000 isn't terribly well supported. "Obviously, if there is no warming trend, these demonstrations [cited by the Intergovernmental Panel on Climate Change] fail-and so do their proofs for AGW [anthropogenic global warming]," Singer concludes.

independent.org