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Wednesday, March 27, 2013

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Fairfax Climate Watch

I didn't include error bars on this chart because the excursion is well outside the margins.

Jpgreenword.wordpress.com

That corroborates with a study done by researchers at Oregon State University where they reconstructed temperatures going back 11,000 years. (http://jpgreenword.wordpress.com/2013/03/19/the-end-of-a-stable-climate/) Seems the whole world was slowly cooling until we decided to use fossil fuels as an energy source.

Fairfax Climate Watch

yea, the history of Earth's temperature is really fascinating. I just read an article by William Ruddiman from 2010 suggesting that the confusion about what caused the last ice age may come from faulty proxy data for the pre-ice core era. It looks like CO2 and CH4 really are the biggest culprits in most of the planet's temperature changes.

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Convert carbon dioxide (CO2) weight to carbon (C) weight

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CO2/3.67 = C 

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ex: 40 GtCO2 ≈ 10.9 GtC

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1 Gt (Gigatonne) = 1 billion tonnes

1 tonne = 1,000 kg

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Also: 1 Pg = 1 Gt

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1 Pg (Petagram) = 1 quadrillion grams

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Soil specialists tend to use Pg, as they are used to working with gram units per square meter of soil area. Atmospheric specialists tend to use Gt. 


Convert carbon emissions to ppm atmospheric CO2

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GtC/2.12 = ppm

To convert emissions of carbon to atmospheric ppm CO2, carbon sinks must be taken into account. 

So far, terrestrial and oceanic sinks have taken up about 50% of CO2.

source

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ex: 40 GtCO2 emissions ≈ 10.9 GtC

10.9 GtC/2.12 ≈ 5.14 ppm CO2 before accounting for sinks

5.14 ppm CO2 x 0.5 ≈ 2.57 ppm CO2 after accounting for sinks

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