Tom Chavez
Al, I’m all in favor of simple living and high thinking, or at least MATH, “Making America Think Harder.”
Gregg, you are right, the oceans contain a lot of CO2, as does the earth, of course. Regarding Le Chatelier’s principle, you interpret it to say that if conditions of a system in equilibrium are changed, then the equilibrium will shift in a direction to restore the original conditions. Applying your interpretation to the increased atmospheric CO2 released from coal, oil, etc., the atmospheric equilibrium will react to restore original conditions by pushing the CO2 back into the ground, into the oceans, etc.
The way I understand the principle is that the system will seek a new equilibrium to minimize the effect of the changes. So the atmosphere is pushing more CO2 into the oceans. As for putting CO2 back into the earth (in the form of coal or gas or whatever), that process will take eons. Or, alternatively, we may end up with a catastrophic change of equilibrium (as described in chaos theory) with the accumulating incremental changes resulting in a radically new equilibrium.
The accumulating CO2 from industrialization creates other knock-on changes, such as the permafrost melting, methane hydrates in the ocean destabilizing, etc., which could conceivably lead to a runaway chain reaction and a radical new equilibrium which would render planet earth too hot for human habitation for eons. We don't know, but ignorance is no excuse.
Ocean acidification is the result of long-term change of ocean chemistry as CO2 is absorbed from the atmosphere. With the increase in CO2 since the Industrial Revolution, the world’s oceans are absorbing CO2 more than in the past.
When CO2 is absorbed in the ocean, it reacts with seawater to form a weak acid, called carbonic acid. The carbonic acid breaks down or dissociates into hydrogen (H+), bicarbonate and carbonate ions.
The results of these chemical reactions include an increase in the amount of hydrogen (H+) ions which is what decreases the pH of the ocean, making it more acidic. As industrialized society produces more CO2 the oceans will continue to become ever more acidic.
Since the beginning of the Industrial Revolution, the pH of the surface ocean has fallen by 0.1 pH units, which represents approximately a 30% increase in hydrogen ion concentration. Problems arise when the pH of the ocean changes more quickly than organisms are able to adapt.
A study in the journal Science of the Total Environment, based on a 2016 survey of Oregon, Washington and British Columbia coastal waters, documented that wild Dungeness larvae had pitted and folded shells, described in their journal article as “severe carapace dissolution,” and are typically smaller in size. The cause appears to be ocean acidity.
The earth’s environment is very complex and unpredictable (consider the ‘butterfly effect”). We are changing the environment in huge ways which we should very carefully reconsider if we don’t want to irreversibly ruin our home planet.
|