Tuesday, October 11, 2011 6:02:16 PM
Yeah yeah, I know, shutting up now. Just to give some food for thought to those who say “but we mere humans couldn’t possibly affect the overall CO2 balance in the atmosphere, earth will heal itself, we’re only small beer etc”. The Eyjafjallajökull eruption in Iceland last year which sent up the ash-cloud over the North Atlantic and grounded all flights between Europe and North America for a week or so, saw slightly less global CO2 production that day from grounded airplanes planes than the volcano put into the atmosphere, as recorded by satellites. Which, when you think about it, made it the world’s first carbon-neutral volcano.
And if that doesn’t convince you, just fire up Google Earth, and have a walk around.
Anyways, not setting off any alarm bells, but just some food for thought.
Tuesday, October 11, 2011 5:51:46 PM
Point is, blanket stating that “CO2 is beneficial not harmful” is a deeply retarded statement to make, and simplifies complex systems to the point where it’s scientifically meaningless. Oceanic Anoxic Events, due to an overabundance of CO2 deoxygenizing our oceans are very real, the evidence being the gasoline you put in your car engine and the TV that comes on when you flick the switch. Good for us in this day and age, but I wouldn’t have wanted to be around when one was going on.
Lastly, don’t underestimate the volume of CO2 that humans are pumping out. Not being alarmist, but best scientific evidence from DSDP (Deep Sea Drilling Project) wells and geological outcrop studies indicate that these global OAE events are likely to occur when CO2 levels get into the 1000ppm range. We’re currently at 400ppm. The present level is higher than at any time during the last 800 thousand years, and likely higher than in the past 20 million years.
Tuesday, October 11, 2011 5:51:25 PM
It’s not a case of higher CO2 levels -> more algae -> Beneficial. High levels of CO2 have been known to cause Algal Blooms, which in many cases are highly toxic to life. In extreme cases, they have led to Global Oceanic Anoxic Events at various points throughout geological time. These are directly correlated to high CO2 levels (as you correctly point out, through periods of high volcanic activity). These are periods when the entire circulatory system of the world’s oceans stagnates, stratifies, and result in mass extinctions due to low oxygenation of the waters because of high CO2 levels. Happened several times in the Cretaceous, the end-Jurassic and in the Palaeozoic.
I know about these because I work in oil and gas exploration, and they make for excellent source rocks. Believe me, I understand these systems, and have published several p