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Politics : Manmade Global Warming, A hoax? A Scam? or a Doomsday Cult? -- Ignore unavailable to you. Want to Upgrade?

To: Hawkmoon who wrote (3427)	11/28/2013 2:06:06 AM
From: bruwin	Read Replies (2) \| Respond to of 4326

There's been much discussion recently about the part that Iron plays in what happens in our oceans. That reminded me of a documentary series I saw recently. It appears that all the Iron that exists in our planet, and elsewhere in our universe for that matter, originated from the disintegration of Supernovas .... to quote ... "But massive stars, many times larger than our own sun, may create a Supernova when their core's fusion process runs out of fuel. Star fusion provides a constant outward pressure, which exists in balance with the star's own mass-driven, inward gravitational pull. When fusion slows, outbound pressure drops and the star's core begins to condense under gravity, becoming ever denser and hotter. To outward appearances, such stars begin growing, swelling into bodies known as red super giants. But at their cores shrinking continues, making a supernova imminent. When a star's core contracts to a critical point a series of nuclear reactions is unleashed. This fusion staves off core collapse for a time, but only until the core is composed largely of <b.Iron, which can no longer sustain star fusion. In a microsecond, the core may reach temperatures of billions of degrees Celsius. Iron atoms become crushed so closely together that the repulsive forces of their nuclei create a recoil of the squeezed core, a bounce that causes the star to explode as a supernova and give birth to an enormous, super heated, shock wave." .... just thought I'd add that as a bit of trivia, although I'm fairly sure it's not news to some on this board.

To: Hawkmoon who wrote (3427)	12/8/2013 2:42:41 PM
From: Jorj X Mckie	1 Recommendation Recommended By Hawkmoon Read Replies (1) \| Respond to of 4326

That's what I'm thinking as well.. Calcium is either combined with Carbon to form a carbonate, or it's dissolved within the seawater. Not quite sure how it is just "consumed" and disappears, but maybe it settles to the ocean floor, as with Iron? This one is a pretty complex issue. There is common consensus among the AGW crowd that the increased atmospheric CO2 creates more carbonic acid in the oceans which in turn causes more bicarbonate (HCO3) ions which increases the ocean's acidity (lowers the pH) by releasing more hydrogen ions. The consensus among the AGW crowd is that calcium in the form of aragonite (CaCO3) is where marine life gets its calcium to form the biogenic calcium carbonate "hard structures" instead of HCO3. So, the issue is not just the generic calcium concentration, but the form that the calcium is in. In basic terms....Aragonite good, bicarbonate bad. If you accept that aragonite saturation is the key issue, there is still the chicken and the egg question. That question being, is increased CO2 causing the warming or is warming causing the increased CO2 (through oceanic outgassing). This becomes an even more important question when it is clear that the aragonite saturation zone changes with the temperature of the ocean water. It appears that many of the beliefs about how marine life reacts to higher acidity are based on artificial experiments that used HCl to get the desired pH levels during testing. At least one study shows that it is the use of HCl in the study that throws all of the results off and pretty much calls into question all of the studies out there that suggest that ocean acidification is a serious global warming issue. The ocean floor is the largest calcium and carbon sink on earth. One thing that we never really hear about is the role that tectonics have on our climate. The ocean floors record the carbon and calcium cycles in the strata. And if undisturbed, should have a leveling effect on the cycles as the material is subducted (and later released through other volcanic activity). But that assumes even distribution over time and doesn't account for ocean currents that may cause variations in the material that is subducted. Hell, when it comes to climate and ocean chemistry, it matters if the volcanic activity is above or below the surface of the ocean. When it comes to calcium concentration and CO2 release, it matters if the volcanic activity is at a hot spot, rift or subduction zone. There are enough buzz words above that anybody can do their google research on the topic. Ocean Acidification Biogenic Calcification Aragonite Saturation HCO3 CaCO3 carbonate bicarbonate Calcium Carbonate Calcite But I strongly recommend reading this study before accepting the AGW consensus. dl.uncw.edu It appears that this is yet another are of the science that is not settled.