Sentences with phrase «acidification occurred»

The rise of CO2 that led to this dramatic acidification occurred during the Paleocene - Eocene Thermal Maximum (PETM), a period when global temperatures rose by around 5 °C over several thousand years and one of the largest - ever mass extinctions in the deep ocean occurred.

2) Why would ocean acidification occur only (or much more) with today's CO2 and not yesteryear's.

Acidification occurs when the oceans absorb CO2 from the atmosphere.

Acidification occurs first in the surface waters and then spreads to the rest of the ocean over time, explains Mathesius:

This acidification occurs in a region with a naturally low carbonate ion concentration, and studies suggest that the surface of the Southern Ocean will become undersaturated with respect to calcium carbonate minerals aragonite and calcite by the end of the century.

Ocean acidification occurs when carbon dioxide dissolves out of the atmosphere and into the ocean, where it chemically reacts and lowers the water's pH. The process is sometimes dubbed the «evil twin» of climate change because of the harmful effects it may have on marine ecosystems.

Ocean acidification occurs when the ocean absorbs large amounts of the carbon dioxide released into the atmosphere as a result of the burning of fossil fuels.

Ocean acidification occurs through the uptake of additional CO2 from the atmosphere.

Not exact matches

A crucial reason why the study of freshwater acidification has lagged until now is because determining how atmospheric carbon affects these ecosystems requires complex modeling, and is much less clear than that occurring in oceans, according to study author Linda Weiss, an aquatic ecologist at Ruhr University Bochum in Germany.

The one - two punch of warming waters and ocean acidification is predisposing some marine animals to dissolving quickly under conditions already occurring off the Northern California coast, according to a study from the University of California, Davis.

The authors said the study underlines the increasing vulnerability of calcified animals to ocean acidification, which occurs as the ocean absorbs more atmospheric carbon emitted through the burning of fossil fuels.

Emerging evidence for variability in the coral calcification response to acidification, geographical variation in bleaching susceptibility and recovery, responses to past climate change, and potential rates of adaptation to rapid warming supports an alternative scenario in which reef degradation occurs with greater temporal and spatial heterogeneity than current projections suggest.

As part of the research projects SOPRAN (Surface Ocean Processes in the Anthropocene) and BIOACID (Biological Impacts of Ocean Acidification) the KOSMOS system was deployed in the Raunefjord at the west coast of Norway, were blooms of Emiliania huxleyi regularly occur in late spring.

The research, published in Nature Communications, examined preserved fossil remains of coccolithophores from a period of climate warming and ocean acidification that occurred around 56 million years ago — the Paleocene Eocene Thermal Maximum (PETM)-- and provides a much - needed long - term perspective of coccolithophore response to ocean acidification.

There is, therefore, much current interest in how coccolithophore calcification might be affected by climate change and ocean acidification, both of which occur as atmospheric carbon dioxide increases.

«The ability to adapt to changing conditions is going to become even more important as humans impact the environment, whether it's from ocean acidification or increasing temperatures or other types of global changes that are occurring.»

«The other carbon dioxide problem», «the evil twin of global warming», or part of a «deadly trio», together with increasing temperatures and loss of oxygen: Many names have been coined to describe the problem of ocean acidification — a change in the ocean chemistry that occurs when carbon dioxide (CO2) from the atmosphere dissolves in seawater.

Ocean acidification processes are occurring at global scales; therefore, we need to go beyond local measurements and observe ocean acidification globally in order to understand its drivers correctly.

While anthropogenic CO2 emissions are driving acidification at global scales, processes occurring at local scales can also affect ocean chemistry.

«Ocean warming, acidification and deoxygenation are essentially irreversible on centennial time scales,» found the Royal Society, a London - based group specializing in scientific research, in a 2011 paper, «[O] nce these changes have occurred, it will take centuries for the ocean to recover.

And while most of the disasters foreseen in the book have not occurred, environmental problems overlooked at the time have become more threatening, such as the acidification of the oceans and the release of hormone - mimicking chemicals into the environment.

If large scale changes in the ocean ecology occur because of acidification the model can not reasonably be expected to capture the effects.

Since you state that a decrease in net calcification could result from a decrease in gross calcification, an increase in dissolution rates, or both, you distinguish between these responses and get to the conclusion that the impact of ocean acidification on a creature's net calcification may be largely controlled by the status of its protective organic cover and that the net slowdown in skeletal growth under increased CO2 occurs not because these organisms are unable to calcify, but rather because their unprotected skeleton is dissolving faster.

Then we have paleoceanographers who look at the impact of ocean acidification events that occurred in the past.

Lowest pH (7.8) and highest pCO2 (658.3 µatm) values measured during a cold - water intrusion event in the non-upwelling season were similar to those minimum values reported from upwelling season (pH = 7.8, pCO2 = 643.5 µatm), unveiling that natural acidification also occurs sporadically in the non-upwelling season.

Ocean acidification is projected to occur relatively rapidly in the Arctic due to processes and conditions that are unique to Arctic surface waters [7]--[9].

During sourdough bread - making gluten is hydrolyzed by proteases during the acidification that occurs from the microorganisms that are present in sourdough culture.

Over acidification of your body wastes your muscle and bone tissues, and as the level of acid rises, cellular congestion occurs along with increased vulnerability to degenerative disease.

No one has formally studied the effect of joint nutriceuticals on urine pH. If one wants to use glucosamine or other products on an arthritic stone forming Dalmatian, the urine pH will require monitoring to be sure excess urine acidification has not occurred.

Failures in the Earth system are already beginning to occur in a number of ways at a GMT increase of only 0.8 oC; GMT does not address huge regional differences in temperature increase; a temperature target doesn't even address ocean acidification; and we are frittering our time here (and in numerous scientific papers) addressing 2oC as if it is a reasonable target???

Realization that we must reduce the current CO2 amount has a bright side: effects that had begun to seem inevitable, including impacts of ocean acidification, loss of fresh water supplies, and shifting of climatic zones, may be averted by the necessity of finding an energy course beyond fossil fuels sooner than would otherwise have occurred.

Whether we look at the steady increase in global temperature; the buildup of greenhouse gases in the atmosphere to the highest level in a half - million years; the march of warmest - ever years (9 of the10 hottest on record have occurred since 2000); the dramatic shrinking of mountain glaciers and Arctic sea ice; the accelerating rise in sea level; or the acidification of our oceans; the tale told by the evidence is consistent and it is compelling.

a. «Ocean acidification» is actually occurring to a significant extent or b.

But other changes are occurring such as the melting of glaciers and ice packs in the Arctic and the acidification of the oceans.

Scientific observations show that ocean acidification is already occurring around the globe and is amplified in some coastal regions by changing ocean circulation, pollution, and land management practices.

Ocean warming is occurring in concert with the acidification of ocean waters (e.g. Doney et al. 2009), as well as changes in ocean circulation (e.g. Bakun et al. 2009).

CO2 is said to be responsible for global warming that is not occurring, for accelerated sea level rise that is not occurring, for net glacial and sea ice melt that is not occurring, for ocean acidification that is not occurring, and for increasing extreme weather that is not occurring.»

And at the risk of being pedantic, ocean acidification, like acidification anywhere, occurs when the pH is less than 7.

Your political views have nothing whatsoever to do with the physical facts of increasing CO2 due to our emissions, the warming that will cause (~ 1.1 C / doubling), the feedbacks that will occur (to a total of about 3C / doubling), crop movements, sea level rise, ocean acidification, precipitation changes, etc..

The decreases in calcification and PIC occur simultaneously with decreases in the observed carbonate ion concentration, suggesting a possible link between acidification and decreasing calcification in this vulnerable region.

• In addition to global warming, fossil fuel burning is causing ocean acidification faster than it occurred in the Paleocene - Eocene Thermal Maximum.

The size of the carbon injection is estimated from changes in the stable carbon isotope ratio 13C / 12C in sediments and from ocean acidification implied by changes in the ocean depth below which carbonate dissolution occurred.

Changes in ecosystem structure can occur when specific organisms respond to surface warming, acidification, changes in nutrient ratios resulting from changes in external sources of nutrients (atmosphere or rivers) and changes in upper trophic levels (fisheries).

If the acidification event occurred in this manner it has important implications for how strongly the Earth might warm in response to increases in atmospheric CO2.

Both acidification and climate change are now occurring at rates that may out pace any evolutionary changes.

Finally the acidification has only recently started and even though there might be no harm now, it is increasingly likely that harm will occur as the pH drops further.

Past hot episodes may also have involved ocean acidification, and this acidification may be a partial explanation of extinctions that occurred.

Organisms living in areas where upwelling of cool, low pH water occurs (e.g. Eastern Pacific and Baltic Sea) may be acclimatized / adapted to acidification [31 — 34], whereas those living in areas with strong warming (e.g. Eastern Australia) may be acclimatized / adapted to increased temperature [7,35].

However, the gradual trend in ocean acidification will be overlaid on additional stressors to marine ecosystems (e.g. temperature, fishing and nutrients) as well as short - term perturbations that occur at local to regional scales (e.g. storms, coral bleaching, coral disease and mass urchin mortalities).

-- Life in the oceans are under severe stress and 90 % of the big fish biomass is already fished out, plus ocean acidification is occurring which threatens entire bio webs.