12 thoughts on “Bring On The Volcanoes”

  1. Ah, but for the anthropogenic warming, we have to find something we can blame on man!

    I blame cleaner-running cars and cleaner factories. Smokestack scrubbers have destroyed the climate!!!

  2. An interesting theory, indeed.

    Earth warms, temperate areas start to dry out, deserts start to expand, dust storms increase, planet cools down, temperate areas restore themselves, deserts shrink, earth warms up…

    You’d think it was some sort of natural cycle or something…

  3. My problems with the science of AGW is the time scale that is studied.

    In order to deduce a climatic pattern, or the break in a climatic a pattern, one needs to study a longer time history than 30, 50, or 100 years.

    These studies are (pro & con) are stamps of what we understand to be currently happening.

    Show me the trend over a geologic time scale, then I’ll be impressed.

  4. McGehee, the convenient thing about anthropogenic global warming is that by definition it is humanity’s fault.

    I wonder how much this effect contributes to average global temperature? Reading around I get the impression that there’s been more than a 0.5 C rise in temperature in parts of the North Atlantic ocean since 1980. Further, since the North Atlantic has somewhere around 8% of the total area of Earth, that means up to a 0.05 C rise in global average temperature due to the North Atlantic temperature rise. 70% of that is considerable.

    In comparison. the rise in global average temperature since 1980 is measured to be somewhere around 0.2C. I don’t know that this research is valid, but if it is, it seems to be a large effect that explains 10% of global average temperature increase since 1980 (incidentally which might heat other regions as well) just on its own.

    Incidentally, here is the original news source. I am annoyed by blogs that fail to link to primary sources.

    From looking at Amato Evan’s webpage, this article will be published in Science magazine at some future date:

    Bennartz, R., R. Preusker, C. O’dell & A. T. Evan (2007) Observational constraints on the first indirect aerosol effect. Science, to be submitted.

  5. Er, I mean the North Atlantic covers 8-12% of the Earth’s land area. I can’t find a good description of its true land area and eyeballing it, the North Atlantic appears to be similar in size to the South Atlantic. Combined the Atlantic Ocean covers a touch over 20% of the Earth’s surface.

  6. No, Earth has 100% land area, just 3/4 of it is covered by water. There is land at the bottom of all oceans. . . 😉

  7. It’s nice that we have such a large heat sink (those oceans) that regulate our temperature.

    You’d think environmentalists would be space advocates… unless they are in reality just anti-any-humans-but-themselves advocates.

  8. Karl, I think it’s the other way around: the assumption is that the warm Atlantic is a symptom of various forcing terms, not a cause. So, e.g. less dust means more UV-vis hits the surface and gets absorbed, one forcing term, and more CO2 means less of the IR that’s re-radiated escapes to space, the other.

    Which is not to say that the question of how much the dust contributes to observed heating changes isn’t very important. Tihs is, after all, what drove the AGC (anthropogenic global cooling) fears of the 60s and 70s, when it was thought air pollution was going to bring on another ice age — and they had the dropping temperature trends to prove it!

    What I think is quite interesting is the question, again, of whether the cause-and-effect link between CO2 and temperature has been reversed. Both have gone up, and because CO2 in the lab is a greenhouse, the assumption has always been that the CO2 increase caused the temperature increase.

    But what if it’s the other way around? Let us keep in mind that an enormous amount of CO2 is dissolved in the Earth’s oceans, and the solubility of CO2 decreases with temperature. Raising the temperature of the ocean will release CO2.

  9. I’m surprised jack lee hasn’t appeared here to blame Dick Cheney for something. Maybe Cheney demanded all the volcanoes in the Atlantic be stopped up so his conquest of Iceland (via the destruction of their financial empire!) could proceed in peace?

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