Where would you guess planetary warming would come from?

National Geographic:

Simultaneous warming on Earth and Mars suggests that our planet’s recent climate changes have a natural — and not a human-induced — cause…Earth is currently experiencing rapid warming…Mars, too, appears to be enjoying more mild and balmy temperatures. In 2005 data from NASA’s Mars Global Surveyor and Odyssey missions revealed that the carbon dioxide “ice caps” near Mars’s south pole had been diminishing for three summers in a row.

Habibullo Abdussamatov, head of the St. Petersburg’s Pulkovo Astronomical Observatory in Russia, says the Mars data is evidence that the current global warming on Earth is being caused by changes in the sun. “The long-term increase in solar irradiance is heating both Earth and Mars,” he said.

Abdussamatov believes that changes in the sun’s heat output can account for almost all the climate changes we see on both planets. Mars and Earth, for instance, have experienced periodic ice ages throughout their histories. “Man-made greenhouse warming has made a small contribution to the warming seen on Earth in recent years, but it cannot compete with the increase in solar irradiance,” Abdussamatov said.

The news story characterizes the idea that the sun is heating the planets as “controversial.” In some ways, the 21st century does not represent progress over the 18th century.

One Response to “Where would you guess planetary warming would come from?”

  1. David/California Says:

    My understanding is that astrophysicists have concluded the Earth’s global climate is almost exclusively determined by three factors: (1) the axial tilt of the Earth, which varies during the year and can vary from year-to-year, (2) the Earth’s orbit, which changes from circular to oval on a random but predictable basis based on the influence of other solar bodies, and (3) solar activity, principally solar flares. The solar flares’ activity may be the most influential because it affects the amount of cosmic radiation which reaches the Earth’s surface, which has been shown to determine global cloud cover, resulting in surface cooling or warming. I’m informed that the astrophysicists have concluded that increased CO2 levels are, in fact, the RESULT on global warming, NOT THE CAUSE.

    The warming on Mars would seem to validate these findings. I wonder if these scientific opinions will ever make the front pages?

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