[Coral-List] More La Ninia

David M. Lawrence dave at fuzzo.com
Mon Nov 29 23:50:36 EST 2010

Gene, please get your facts right.  The annual zigzags in the Keeling 
curve are seasonal changes in atmospheric carbon dioxide levels 
triggered by seasonal changes in the balance between photosynthesis 
(which removes carbon dioxide from the atmosphere) and respiration 
(which releases carbon dioxide to the atmosphere) in northern hemisphere 
terrestrial ecosystems.

In the fall, deciduous species drop their leaves, other species stop 
growing.  Living plants need energy, and produce it by respiration.  
Dead plants decompose, the bacteria and fungi responsible for that 
decomposition produce energy by respiration, too.  Respiration dominates 
the balance through the winter into the spring -- as it does so, 
atmospheric CO2 concentrations increase.  In the spring and summer, 
plants leave out and grow -- photosynthesis dominates the balance, and 
atmospheric CO2 concentrations decrease.  So, contrary to you comment, 
it's not temperature driving the seasonal changes in CO2, but the biosphere.

You really should invest in a fire extinguisher.  The physics is 
settled, whether or not you choose to pay attention to it.


On 11/29/2010 9:33 AM, Eugene Shinn wrote:
>        I suspect that Arhenius did not know that if you raise the
> temperature you also raise the CO2 level.(thats the little annual
> spikes on the Keeling CO2 curve) Even if it was CO2 causing the
> cycles in deep sea cores  described by Arrhenius what caused the CO2
> spikes.

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