Sentences with phrase «of changes in ocean chemistry»

Read / Purchase the Report Ocean Acidification: A National Strategy to Meet the Challenges of A Changing Ocean (2010) Excess carbon dioxide in the atmosphere — in addition to contributing to climate change — is absorbed by the ocean, making sea water more acidic and leading to a suite of changes in ocean chemistry.

Excess carbon dioxide in the atmosphere — in addition to contributing to climate change — is absorbed by the ocean, making sea water more acidic and leading to a suite of changes in ocean chemistry.

Not exact matches

Now, a 15 - year, 30 - nation research collective called Geotraces is embarking on an ambitious global survey of ocean chemistry to quantify trace elements and shed light on how chemical concentrations fluctuate in response to changing environmental conditions.

This means that the sudden appearance of rangeomorphs at large size could have been a direct result of major changes in climate and ocean chemistry.

«When tiny bacteria in the ocean began producing oxygen, it was a major turning point and changed the chemistry of the Earth,» explained Katsev.

Instead, the team points out that similar swings in different isotopes» levels, occurring in both parts of the world, suggest that the two regions were experiencing the same changes in ocean chemistry at the same time.

At a global level, the excess of atmospheric CO2 is absorbed by ocean waters and it causes changes in water chemistry (pH decrease or ocean acidification).

Scientists conducting fieldwork in the region are reporting massive chick die - offs and nests with abandoned eggs, reports National Geographic's Winged Warnings series, which lays out the many threats facing the island's seabirds: warming oceans, earlier thaws, changing ocean chemistry and food webs, and increasing levels of ocean pollutants from PCBs to mercury.

«Changes to the chemistry of the Arctic Ocean could lead to changes in currents and weather patterns worldwide,» hChanges to the chemistry of the Arctic Ocean could lead to changes in currents and weather patterns worldwide,» hchanges in currents and weather patterns worldwide,» he said.

As atmospheric CO2 levels rise, those in the oceans do too, changing the chemistry of the seawater.

By studying the chemistry of growth rings in the shells of the quahog clam, an international team led by experts from Cardiff University and Bangor University have pieced together the history of the North Atlantic Ocean over the past 1000 years and discovered how its role in driving the atmospheric climate has drastically changed.

The chemistry in the growth rings in the shells of the clam — which occur much like the annual growth rings in the centre of trees — can act as a proxy for the chemical make - up of the oceans, enabling researchers to reconstruct a history of how the oceans have changed over the past 1000 years with unprecedented dating precision.

A McGill - led international research team has now completed the first global study of changes that occurred in a crucial component of ocean chemistry, the nitrogen cycle, at the end of the last ice age.

Enter the toy octopus: A team of researchers in California is exploring how the changing ocean chemistry affects a hermit crab's fight - or - flight response by simulating octopus attacks in the laboratory.

Seagrasses also undergo a high rate of photosynthesis that may serve to buffer changes in ocean chemistry that affect shell - building organisms.

The team analyzed little studied factors that play a role in ocean acidification (OA)-- changes in water chemistry that threaten the ability of shellfish such as oysters, clams and scallops to create and maintain their shells, among other impacts.

Beyond the sea level rise itself, the ancient geologic and geographic changes probably led to a buildup of oxygen in the atmosphere and a change in ocean chemistry, allowing more complex life - forms to evolve, he said.

How are humans driving changes in the chemistry of the ocean, and what might this mean for marine ecosystems in the future?

«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.

Such priorities include: 1) establishing an ocean carbon chemistry baseline; 2) establishing ecological baselines; 3) determining species / habitat / community sensitivity to ocean acidification; 4) projecting changes in seawater carbonate chemistry; and 5) identifying potentially synergistic effects of multiple stressors.

ref Such changes in the carbon chemistry of the open ocean probably have not occurred for more than 20 million years.

ref It will also be important to encourage socioeconomic research on the impacts of ocean acidification, the projected timing of impacts, and the ways to increase adaptability and resilience of socioeconomic systems in the face of changing ocean chemistry.

Oceanic uptake of anthropogenic carbon dioxide (CO2) causes pronounced shifts in marine carbonate chemistry and a decrease in seawater pH. Increasing evidence indicates that these changes — summarized by the term ocean acidification (OA)-- can significantly affect marine food webs and biogeochemical cycles.

The South China Sea (SCS) is said to be ocean - dominated at depth, and its CaCO3 records should reflect and preserve the effects of changes in the carbonate chemistry of the (western) Pacific Oocean - dominated at depth, and its CaCO3 records should reflect and preserve the effects of changes in the carbonate chemistry of the (western) Pacific OceanOcean.

We also have modellers that project future changes of ocean chemistry and biology in the next decades and century.

«Documenting an effect of OA [ocean acidification] involves showing a change in a species (e.g. population abundance or distribution) as a consequence of anthropogenic changes in marine carbonate chemistry.

The carbon dioxide buildup is changing the chemistry of surface seawater, lowering its pH in a way that, in theory, could be harmful to the shell - forming and reef - forming marine organisms of today's ocean ecosystem.

There's plenty more in the report summary, of course, on everything from changes in sea ice to ocean chemistry.

Hales» pioneering research in ocean carbon chemistry underlies much of what we know about the role carbon dioxide from fossil fuel emissions plays in changing the chemistry of Northwest seas.

Even with almost no chance of the high end of climate sensitivity estimates being right, the odds of substantial, prolonged and disruptive climate change (and changes in ocean chemistry) are still plenty high enough to justify a sustained push toward an energy menu that works for the long haul.

Climate change, rising atmospheric carbon dioxide, excess nutrient inputs, and pollution in its many forms are fundamentally altering the chemistry of the ocean, often on a global scale and, in some cases, at rates greatly exceeding those in the historical and recent geological record.

Changes in the ocean, ocean chemistry and biology on land and ocean need a lot of study.

This change in ocean chemistry can strip away the building blocks of coral reefs, weakening an important link in the oceanic food chain.

It's been enough to raise the levels of the ocean — and the extra carbon in the atmosphere has also changed the chemistry of that seawater, making it more acidic and beginning to threaten the base of the marine food chain.

«I've been surprised by the scarcity of direct data on the changes in pH and ocean chemistry more generally.

The ocean uptake of excess atmospheric carbon dioxide, the excess above preindustrial levels driven by human emissions, causes well - understood and substantial changes in seawater chemistry that can affect marine organisms and ecosystems.

The rate of that process reacts rather weakly to modest changes in pH and that change affects the ocean chemistry significantly only on very long term.

As long as I have tried to learn about ocean acidification I've been surprised by the scarcity of direct data on the changes in pH and ocean chemistry more generally.

It will be harder to get such a clear sign in a shell from other ocean regions — as variables like temperature and the amount of minerals available can significantly change the chemistry of a given ocean region.

«We knew there were changes in carbonate chemistry of the surface ocean associated with the large - scale glacial - interglacial cycles in CO2 [levels], and that these past changes were of similar magnitude to the anthropogenic changes we are seeing now,» says study co-author William Howard, a marine geologist at ACE.

Finding a way to reverse climate change is the foremost challenge of our time and the first step is collecting ocean data in order to help us understand how seawater chemistry is changing.

While scientific models can tell us what is going to happen as the earth warms, climate change will also be influenced by small so far neglected fluctuations in chemistry such as these pH changes in our oceans, affecting billions of creatures, and of course, us.

IANS: Climate change is causing toxic metals trapped in the sediment beds of the Hooghly estuary in the Indian Sunderbans to leach out into the water system due to changes in ocean chemistry, say scientists, warning of potential human health hazards.

There is a risk that small changes in the radiative properties of the atmosphere, in terrestrial hydrology and in ocean chemistry can trigger large responses in the Earth system.

But the change in carbon chemistry of the ocean and ultimately the atmosphere need to be transparently documented, also, if we are to trade carbon offsets based on iron fertilization.

Changes in ocean chemistry, which can be described through the Revelle buffer factor [1], limit oceanic removal of CO2 [2], while the potential for terrestrial vegetation to take up CO2 is also predicted by some models to fall as the climate warms [3], although the size of this feedback is uncertain [4].

And the changes in ocean chemistry are the sort of thing that can be expected to have a direct effect on the geological record if carbon levels rise far enough.

«Ocean acidification» (OA), a change in seawater chemistry driven by increased uptake of atmospheric CO2 by the oceans, has probably been the most - studied single topic in marine science in recent times.

Accumulating strong evidence suggests that these changes in ocean temperature and chemistry, including pH, will likely affect major Alaska marine fisheries, although the relative importance of these changes and the exact nature of response of each fishery are uncertain.16, 17,18,122,19,20,21

Current and projected increases in Alaska's ocean temperatures and changes in ocean chemistry are expected to alter the distribution and productivity of Alaska's marine fisheries, which lead the U.S. in commercial value.