Ocean acidification, continued

Climate change effect on oceans under-estimated: CSIRO - ABC News

From this very short report:

CSIRO marine scientists say the Intergovernmental Panel on Climate Change and scientists worldwide are neglecting the earth's oceans in researching the effects of climate change.

In an article published today in the journal Science, the researchers argue that the effects of climate change on oceans is being underestimated.

Meanwhile, the Hobart Mercury reported recently about a conference there:

CSIRO marine scientist Bronte Tilbrook said what was already known about ocean acidification was troubling.

"Indications are that we will see some fairly significant changes in the ecosystem," Dr Tilbrook said.

"Under the CO₂ emissions scenarios -- and it's the high ones we seem to be tracking at present -- in about 2060 we'll cross a chemical threshold in the Southern Ocean where one form of calcium carbonate will become chemically unstable.

"It's very early days to say there will be a decline in (fishery) production or an increase -- some species will do better, we just don't know if they're going to be of much value for the ecosystem."

And earlier in the report:

The gathering of some of the region's leading climate change experts was told oceans would reach a carbon saturation tipping point within 50 years and nobody knew what might happen then.

Now, as the article makes clear, these problems are going to happen regardless of successful cuts in current CO2, because of the time it takes for the ocean to absorb CO2. So, you could argue that there is not much point in worrying now anyway.

But, go back to my original posts about this for my argument as to why we shouldn't let CO2 creep up towards 1000 ppm.

Pay attention, people.