Sentences with phrase «ocean oxygen»

The maps could also be useful resources for deciding where to place instruments to monitor ocean oxygen levels in the future to get the best picture of climate change impacts.

One problem is that researchers haven't been studying ocean oxygen levels that long, so there isn't an extensive history of data collection to draw on.

Previous research has also suggested that ocean oxygen levels are going down globally.

Extreme events of ocean oxygen depletion leading to anoxia are thought to be prime candidates for explaining some of the large extinction events in Earth history including the largest such event at the end of the Permian 250 million years ago.

But it isn't always that easy, and nowhere is this made plainer than in the varying explanations offered for observations of changing ocean oxygen concentrations.

During an unrelated study of ocean oxygen during this dire time, he and his colleagues pulled up cores of sediment in northern Germany near Braunschweig from what had once been a huge lagoon.

Widespread declines in ocean oxygen concentrations are now being reported with authors offering quite different explanations.

«As ocean oxygen content declines and acidity increases in California waters it will become increasingly important to incorporate these changes into fisheries management practices,» says Scripps Institution of Oceanography researcher Lisa Levin, Sato's advisor and a study coauthor.

«Long - Term Ocean Oxygen Depletion in Response to Carbon Dioxide Emissions from Fossil Fuels.»

Conducting global research on how climate change is impacting ocean oxygen levels has been an ongoing challenge for ocean scientists.

To make their predictions even better, Deutsch would like to see broader use of ocean oxygen monitoring through close to 4,000 Argo floats, autonomous ocean robots that collect data and send information to satellites.

Koslow said that for the most part, the public was not as aware of the effects of climate change on ocean oxygen levels.

It is our hope that wider consideration of this feedback loop and the timing of its onset, will improve our understanding of the extent to which Earth's atmosphere - ocean oxygen reservoir is regulated.»

Currently ocean oxygen measurements are relatively sparse.

However, Prof Robert Diaz at the Virginia Institute of Marine Science, who reviewed the new study, said: «Right now, the increasing expansion of coastal dead zones and decline in open ocean oxygen are not priority problems for governments around the world.

Reduced fossil fuel emissions are needed over the next few generations to limit ongoing ocean oxygen depletion and acidification and their long - term adverse effects».

The worst - case result is that mean ocean oxygen concentration falls to a low of about 68 % of pre-industrial levels in the next few millennia, while low - oxygen «dead zones» — which don't support fish or many other marine animals such as crabs and clams — spread nearly six-fold to cover 12.8 % of the sea surface area.

Substantial reductions in fossil - fuel use over the next few generations are needed if extensive ocean oxygen depletion for thousands of years is to be avoided.

«Some climate models suggest that under global warming scenarios, ocean oxygen content will decrease,» Johnson says.

The findings are reported in a paper «Long - term ocean oxygen depletion in response to carbon dioxide emissions from fossil fuels» published on - line in the scientific journal Nature Geoscience.

Chan studies ocean oxygen concentrations off the coast of Oregon.

The amount of trace elements in ocean pyrite correspond to ocean oxygen concentrations at different points in geologic time.

And no one knows how the biological pump will respond to human influences such as climate change and the accompanying acidification of ocean waters, or to decreases in ocean oxygen levels driven by the excess of nutrients that wastewater treatment, agriculture, and other human activities are putting into the ocean.

The collision wasn't directly responsible for the extinction, but rather triggered a series of events, such as massive volcanism and changes in ocean oxygen, sea level and climate.

«Widespread loss of ocean oxygen to become noticeable in 2030s: Deoxygenation due to climate change threatens marine life.»

The latest results come at a time when scientists are already reconsidering what was happening to ocean oxygen levels during this crucial period.

«If the ocean oxygen changes, then the depth of these migrations also will change.

«If a civilization uses fossil fuels, the climate change they trigger can lead to a large decrease in ocean oxygen levels.

Physical oceanographers, keenly aware of how sensitive their models are to changes in the wind field, tend to invoke changes in wind as the primary driver of changes in the ocean oxygen field.

Ocean oxygen depletion affects ocean and land life profoundly.

Other consequences include a decline in ocean oxygen, the bleaching of coral reefs, and the melting of sea ice and ice shelves.

Ocean oxygen levels have been dropping since the 1980s in a pattern consistent with expectations from global warming, according to a new analysis of 50 years of global ocean data.

If a civilization uses fossil fuels, the climate change they trigger can lead to a large decrease in ocean oxygen levels.