The uptake of fossil fuel carbon dioxide (CO2) by the ocean increases seawater acidity and causes a decline in carbonate ion concentrations. This process, termed ocean acidification, makes it energetically more costly for calcifying organisms to form their calcareous shells… Read More ›
In the vast and chaotic climate systems that govern our atmosphere and oceans, making sense of how one change — diminished sea ice — affects places or people thousands of miles away is a task of such extraordinary complexity that it strains even the most sophisticated supercomputers.
Veteran diver Steve Lackey, an instructor at Sub-Surface Progression Dive Shop in Fort Bragg, said, “I try not to be an alarmist, but it is pretty unprecedented, in my opinion.”
This time of year, he’s accustomed to seeing small sprouts of kelp begin to appear on the ocean floor, a harbinger of the spring and summer growing season. This year, there are none, he said.
“I don’t remember quite this clean, this kind of scoured rock, with hungry invertebrates,” he said.
“Communities around the country are increasingly vulnerable to ocean acidification and long-term environmental changes,” said Richard Spinrad, chief scientist for the National Oceanic and Atmospheric Administration, and former OSU vice president for research. “It is crucial that we comprehend how ocean chemistry is changing in different places…”
Tropical coral reefs cover less than 1% of the ocean, but they are home and nursery to 25% of all marine species; billions of fish, mollusks and other creatures rely on reefs for their food and shelter. Their wonder and beauty generates needed tourism dollars for many poor nations, and they act as natural barriers providing storm surge protection for many millions of coastal residents.
“Overall, we found there’s a decrease in species diversity and abundance irrespective of what ecosystem we are looking at. These are broad scale impacts, made worse when you combine the effect of warming with acidification.