[NSRCA-discussion] What a difference a year makes

[Bill's Email]

On 3/20/13 1:46 PM, Larry Diamond wrote:
> Nice...
> Food for thought... I wonder how many years of pollution by 
> industrialized nations is equal to one St. Helens blast/eruption?
> An interesting thought against global warming... Studying Earth's 
> History now... LOL... Since the Earth was formed 4.6 billion years 
> ago, ALL DATA Points to Earth Cooling as a trend... Just saying...
>
Good question. Perhaps these will help:

http://www.scientificamerican.com/article.cfm?id=how-do-volcanoes-affect-w

 From that article:
" There is no doubt that volcanic eruptions add CO_2 to the atmosphere, 
but compared to the quantity produced by human activities, their impact 
is virtually trivial: volcanic eruptions produce about 110 million tons 
of CO_2 each year, whereas human activities contribute almost 10,000 
times that quantity."

http://volcanoes.usgs.gov/hazards/gas/climate.php
 From that article:
"
While sulfur dioxide released in contemporary volcanic eruptions has 
occasionally caused detectable global cooling of the lower 
atmosphere,*the carbon dioxide released in contemporary volcanic 
eruptions has never caused detectable global warming of the atmosphere*. 
This is probably because the amounts of carbon dioxide released in 
contemporary volcanism have not been of sufficient magnitude to produce 
detectable global warming."

The examples go on for a long time, but I think you get the point.


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