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Monokultur » At gennemskue en graf


At gennemskue en graf

Diverse — Drokles on December 11, 2009 at 7:08 pm

Det er ikke en sag at gennemskue, hvad en graf har at fortælle. Richard Attenborough (den tykke mand med den dæmpede stemme i gorillaflokken) prøver at forstå den globale opvarmning, som en forsker forklarer ham den

The Foresight Institute gennemgår de også grafer og her viser det sig, hvorfor man skal være på vagt. Her har man kigget på en is-kerne boring fra Grønland

So what does it tell us about, say, the past 500 years? (the youngest datum is age=0.0951409 (thousand years before present) — perhaps younger snow doesn’t work so well?):

histo6

Well, whaddaya know — a hockey stick.  In fact, the “blade” continues up in the 20th century at least another half a degree.  But how long is the handle? How unprecedented is the current warming trend?

histo5

Yes, Virginia, there was a Medieval Warm Period, in central Greenland at any rate.  But we knew that — that’s when the Vikings were naming it Greenland, after all.  And the following Little Ice Age is what killed them off, and caused widespread crop failures (and the consequent burning of witches) across Europe.  But was the MWP itself unusual?

Den er værd at læse i sin helhed.

1 Kommentar »

  1. Det er nu ikke skuespilleren, Richard Attenborough, vi ser i videoen. Det er hans bror, videnskabsjournalisten, David Attenborough…

    h ttp://en.wikipedia.org/wiki/David_Attenborough

    Comment by Universalgeni — January 2, 2010 @ 2:56 pm

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