Horse crap. They never bothered to measure it before so we have no idea WHAT it was like before. And as I pointed out in the other link, carbonates are MORE SOLUABLE in colder water than warm which kinda screws with your little fairytale....
"Counter to the typical increase of mineral solubility with increasing temperature observed for most minerals,
many carbonate minerals are more soluble in cold water. For example, the Ksp for calcite at 0 and at 50 is 10-8.02 and 10-8.63, respectively (Garrels and Christ, 1965). These values represent about a four-fold difference in calcite solubility caused by temperature alone. A thorough discussion of the thermodynamic reactions of carbonate minerals solubilities is beyond the scope of this article. A simplified explanation for carbonate minerals being more soluble in cold water is that the dissolution reaction for carbonate minerals is exothermic, which results in higher temperatures favoring the solid phase over dissolved ions. A more detailed discussion for this unusual behavior can be found in Langmuir (1997).
In addition to an increase in solubility products with decreasing temperature, carbon dioxide is more soluble at lower temperatures, further favoring carbonate mineral dissolution in cooler environments. More carbonic acid is present in cold water at a given partial pressure of carbon dioxide (P ) and carbonic acid concentration is the controlling factor for the solubility of carbonate minerals under natural conditions. Carbon dioxide is obtained from the air or from decomposition of organic matter that releases carbon dioxide which reacts with water to form carbonic acid. These factors combine to form the calcite compensation depth (about 4,500 m) below which calcite dissolves.
When geothermal waters reach the surface of Earth and precipitate tufa, a calciumcarbonate rock, some reaction must overcome the temperature decrease or these waters would dissolve calcite rather than deposit tufa as the water cools. The required reaction is the loss of CO2 due to lower P pressure at EarthÂ’s surface and subsequent a decrease in the amount of carbonic acid, which controls the amount of dissolved calcite (see Calcite Solubility below)."
Carbonate Chemistry
Again, you lie, Walleyes. The proxies they have for that give very good information concerning the amount of aragonite in solution for as recent as 1800.
Um, OR, I dont think proxies EVER substitute for actual measurments since there are too many variables that deny an ability to get even a certain number of significant digits for the data used from the proxy. They may be useful for guesstimates but that is not something one can compare to actually measured stats.
Take the tree ring data for example used for many AGW models. The same data that shows cooler temperatures for areas prior to acurate measuring instruments being present also shows a continuing cooling process with a resultant decline in temperatures that the current global measurements refute.
So how acurate is the tree ring data for past temperatures? We really dont know, but we do know that they dont entirely correspond to known temperatures that have actually been measured directly.
Yes, as the ocean waters warm, and become more acidic, there will be less aragonite in solution. Which is what the site demonstrates. Demonstrates with historic data, and with reasonable projections from present increases in heat and acidity. And, as has been the case with the past predictions, probably have underestimated the speed with which this will occur.
Well not the past predictions I have seen. I am old enought to remember how we only had seven years to save the Earth back in 1995 when I graudated from college after about eight years of night school.
OR, there is a huge money making industry among scientists that promote the AGW agenda, and I no longer have any confidence in the objectivity or scientific rigor of the current climate science establishment. I think this is a growing view of that discipline.
