Over the last 50 years or so, Earth’s average temperature has, by some accounts, risen about one degree Fahrenheit. During this same time, global warming has been observed on Mars, Neptune, Neptune’s moon Triton, and Pluto. Is that just coincidence or are natural cycles at work?
Proponents of anthropogenic global warming (AGW) claim that human carbon dioxide emissions are the main cause of recent warming on Earth. I have yet to see any compelling physical evidence to support that hypothesis.
There is, however, physical evidence that Earth’s temperature and climate are controlled by cyclic changes in the Sun’s luminosity and magnetic field. There is also physical evidence that Earth’s global temperature and climate are related to the Earth’s position relative to the sun. These positional relationships include variations in orbital eccentricity, and variations and magnitude of axial tilt. These cycles induce atmospheric oscillations that affect our weather and global temperature, and ultimately climate cycles. For a more detailed look at these cycles, see Ice Ages and Glacial Epochs. Similar natural cycles are apparently at work on other planets too.
AGW proponents are under fire resulting from release of more emails in the “Climategate” scandals. These emails show, as in the previous release two years ago, that a small cabal of influential scientists promoted the AGW line, schemed to suppress dissenting views, bullied journal editors, hid the decline, and in private expressed much more uncertainty than their public statements would connote. While we are waiting to see the fallout from recent revelations, I offer for your consideration an essay by British scientist and engineer Dr. John Brignell titled: “How we know they know they are lying.” Among other things, he discusses the difference between real science and bureaucratic science (BS): http://www.numberwatch.co.uk/lying.htm