Climate Change and Ocean Acidification Explained

The ocean plays a crucial role in regulating Earth's climate through carbon dioxide absorption.Carbon dioxide molecules from human activities accumulate in the atmosphere.The ocean absorbs approximately twenty-five percent of all human-produced carbon dioxide emissions.This natural process involves the exchange of carbon dioxide between the atmosphere and ocean surface.When carbon dioxide dissolves in seawater, it forms carbonic acid through a chemical reaction.This absorption has dramatically increased since the Industrial Revolution in the mid-eighteenth century.The rate of carbon dioxide absorption has risen sharply, with oceans now taking in more CO2 than ever before in human history.Today, the ocean is absorbing carbon dioxide at a rate ten times faster than any time in the past three hundred million years.This unprecedented rate of absorption is leading to significant changes in ocean chemistry.When carbon dioxide dissolves in seawater, it undergoes a series of chemical reactions.These reactions release hydrogen ions into the water, making it more acidic and lowering the pH level.Before the Industrial Revolution, ocean pH was around 8.2.Today, it has dropped to 8.1, representing a thirty percent increase in acidity.This increase in acidity means there are more hydrogen ions in the water.This change in ocean chemistry is happening at an unprecedented rate. While natural pH changes typically occur over millions of years, the current change is happening in just decades.Ocean acidification has severe impacts on marine organisms that build shells and skeletons from calcium carbonate.Scientists project that by 2100, ocean pH could drop significantly, representing a 150% increase in acidity.In more acidic conditions, coral reefs struggle to maintain their structure, becoming weaker and more vulnerable.Shellfish and plankton have difficulty forming their protective shells, making them more susceptible to predation.These changes affect the entire marine food web, from the smallest plankton to commercial fisheries.The impacts extend beyond marine life to affect millions of people who depend on healthy oceans for food and livelihood.