Scientific american flaws of online dating
Hopefully it will give some insight into the science and the people behind it.  Look at the instrumental record!
There are huge differences between different regions - Alaska has warmed substantially while eastern North America cooled after the 1950s.
* The second IPCC report (1995) states that “data prior to 1400 are too sparse to allow the reliable estimation of global mean temperature” and shows a graph of proxy-derived temperatures for Earth’s Northern Hemisphere from 1400 onward with different details but a similar overall trend to the first report. * The third IPCC report (2001) states that the latest proxy studies indicate “the conventional terms of ‘Little Ice Age’ and ‘Medieval Warm Period’ appear to have limited utility in describing …
global mean temperature changes in past centuries.” The report contains the following graph of average temperature changes in Earth’s Northern Hemisphere, showing higher temperatures at present than at any time in the past 1,000 years.
It shows a “Medieval warm period” that was warmer than the present era and a “Little Ice Age” that was cooler.
do not allow any observational assessment” because many variables are involved, and “it is not possible …
to insure that only one variable is changing.” found that during 1973-2007, humidity increased in the lowest part of Earth’s atmosphere but decreased at higher altitudes, implying that the “long-term water vapor feedback is negative—that it would reduce rather than amplify” the warming effect of CO2.
For instance, the sea level in the Indian Ocean is about 330 feet below the worldwide average, while the sea level in Ireland is about 200 feet above average.
Such variations are caused by gravity, winds, and currents; and the practical effects of these phenomena are dynamic.