Booms, Busts, and Recoveries Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Strategies & Market Trends : Booms, Busts, and Recoveries

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: Moominoid who wrote (50102)	7/18/2004 7:05:02 AM
From: Maurice Winn	Read Replies (1) of 74559

David, you are first person other than me who I've seen even slightly relate plate tectonics to ice ages and carbon cycles. <The real long-run changes seem to be driven by plate tectonics... though that is pretty uncertain... anyway that is much too slow to make any difference to our current predicament.> But I don't think it's uncertain. It's certain. If there wasn't any tectonic activity, including subduction, there wouldn't be any recycling of the ocean sediments. They'd just sit there getting thicker and thicker until the oceans were shallower and the amount of land sticking up above the oceans was nothing much at all. We really would get a watery world. Now that I think of it, the oceans wouldn't get all that much shallower if all the land was washed into the oceans. Now, the 'scientists' have discovered that oceans absorb CO2. The article is written as though these are new discoveries. Next they'll figure out that the ocean floor is a big sink for carbon, in the form of limestone and organic residue from fish and mammals. news.nationalgeographic.com After that, they'll realize that the oceanic plates get subducted and the organic material feeds volcanic activity, [that which doesn't get stored in oil and gas fields]. When there's lots of CO2 in the atmosphere, lots gets absorbed in the oceans and buried in oceanic sediment. It takes 10 million years at 10cm a year for 1000 kilometres of crust to be subducted. So when there has been a period of lots of CO2 and hence deposition of carbon into the oceanic crust due to accelerated biosphere activity in the absence of ice-age, it takes 10 million to 50 million years for that carbon to be recycled back up via volcanoes after subduction. When there's an ice-age, the amount of carbon being deposited in limestone and organic material is lower, because there isn't so much biosphere activity because much of the world is frozen. Mqurice

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next