by Norm Kalmanovitch, Calgary Herald
," Letter, April 30.
Pure water has a pH of 7. Acids have a pH below 7, bases have a pH above 7. Sea water has a typical pH of 8.2, so it is a base, not an acid. Sea water is saturated with the carbonate ion which means that it is saturated in CO2. Soda water is acidic because it is pure water with just CO2 which forms carbonic acid. Soda water at bottled pressure of 2.5 atmospheres, has a pH of 3.7 making it quite acidic, but if left standing in the refrigerator at 2 degrees C at atmospheric pressure, the CO2 will bubble off leaving a saturated solution with a pH of 5.6. If the soda water is left standing at room temperature, more CO2 will bubble off, leaving a saturated solution with a less acidic pH of 5.7. CO2 saturation is dependent on temperature and pressure, and in sea water the amount of CO2 dissolved is a function of depth and temperature.
In all cases, sea water is saturated in CO2, but as sea water is basic, any acidity changes due to CO2 really have no effect because of the overwhelming predominance of dissolved salts that make sea water basic. People are entitled to their opinions, but they are not entitled to misrepresent fact as has continually been done promoting the scientifically baseless human-caused global warming issue.
Norm Kalmanovitch, Calgary
Listed below are a series of letters published in the Calgary Herald that started from the article "CO2 buildup turning ocean water acidic" by Deborah Zaba
CO2 buildup turning ocean water acidic
by Deborah Zaba Renko, Reuters
Carbon dioxide emissions that contribute to global warming are also turning the oceans more acidic at the fastest pace in hundreds of thousands of years, the National Research Council reported on Thursday.
"The chemistry of the ocean is changing at an unprecedented rate and magnitude due to anthropogenic carbon dioxide emissions," the council said.
"The rate of change exceeds any known to have occurred for at least the past hundreds of thousands of years."
Ocean acidification eats away at coral reefs, interferes with some fish species' ability to find their homes and can hurt commercial shellfish like mussels and oysters and keep them from forming their protective shells.
Corrosion happens when carbon dioxide is stored in the oceans and reacts with sea water to form carbonic acid.
Unless carbon dioxide emissions are curbed, oceans will grow more acidic, the report said. Oceans absorb about one-third of all human-generated carbon dioxide emissions, including those from burning fossil fuels, cement production and deforestation, the report said.
The increase in acidity is 0.1 points on the 14-point pH scale, which means this indicator has changed more since the start of the Industrial Revolution than at any time in the last 800,000 years. The council's report recommended setting up an observing network to monitor the oceans over the long term.
"A global network of robust and sustained chemical and biological observations will be necessary to establish a baseline and to detect and predict changes attributable to acidification," the report said.
Scientists have been studying this growing phenomenon for years, but ocean acidification is generally a low priority at international and U.S. discussions of climate change. A new compromise U.S. Senate bill targeting carbon dioxide emissions is expected to be unveiled on April 26.
by Barry McIntyre, Calgary Herald
Re: "CO2 buildup turning ocean water acidic," April 23.
There was a major inconsistency arising from a report this week that CO2 levels in the ocean are rising fast and causing chemical changes. The only way CO2 absorption can increase is if the water temperature is dropping. This is a well-known property. How can this be if, as we have been told, the oceans are getting warmer? The simple answer is that the oceans are getting colder, counter to all we have been told. In their zeal to push CO2 as the enemy, scientists are unwittingly showing the fallacy of their own arguments. CO2 levels in the oceans increase when things are cooling down, not when they are warming up.
by John C. Ruelle, Calgary Herald
Re: "Cold water," Letter, April 27.
I must disagree with Barry McIntyre's recent comment on the absorption of oceanic CO2 ( "The only way CO2 absorption can increase is if the water temperature is dropping"). This is true only if the oceans have reached maximum saturation point. However, ocean waters are still under-saturated with CO2 and can therefore absorb more. The question is, will this cause the acidity to rise sufficiently to have a detrimental effect on calcareous critters?
John C. Ruelle,