Sentences with phrase «of oxygen depletion in»

An intensification of oxygen depletion in the ocean therefore also has the potential to alter the global ocean inventory of nitrate, affecting photosynthesis in the ocean.

Two recently published studies detail the cycle of oxygen depletion in the lake's bottom waters, and the ecological impacts from bacteria to fish.

Nitrogen - rich fertiliser runoff is the primary cause of oxygen depletion in oceans, lakes and rivers, leading to aquatic «dead zones.»

«What complicates this story is that if these animals are responsible for a chunk of oxygen depletion in general, then a change in their habits might have a feedback in terms of oxygen levels in other parts of the deeper ocean.»

Not exact matches

We continue to pour on the nitrogen, even as scientists report the existence of 50 «dead zones» where nitrogen has flowed from fields to water, and resulted in an excess of plant growth, a depletion of oxygen and the extinction of life.

Measurements of oxygen depletion weeks after the spill detected as much as a 30 percent drop in the Gulf of Mexico seawater.

During the last century, the areas of oxygen depletion have increased drastically from approximately 5,000 km2 in around 1900 to the present day, where they extend to 60,000 km2 — or about one and a half times the total area of Denmark.

The influence of climate change was evident in areas with either extreme incidents of oxygen depletion or longer - than - normal trends of low oxygen levels.

«Concentrations of oil in this deep plume are so low that we don't see oxygen depletion,» he explains.

If you look at the last 65 million years, in the so - called Cenozoic era, I don't think there are any examples of globally widespread subsurface oxygen depletion.

Scientists with the U.S. Geological Survey, the Illinois - Indiana Sea Grant and partners recently found that dead zones caused by hypoxia, the depletion of oxygen in water, are unexpectedly variable in Lake Erie, sometimes disappearing and reemerging elsewhere in the matter of hours.

Over the past 50 years, changes in land use and wastewater inputs have led to eutrophication of the lake, with increased turbidity and oxygen depletion in deeper waters.

Although oxygen depletion occurs naturally in some parts of the ocean, such as fjords and deep basins, the Gulf of Mexico's dead zone is caused by humans.

In their work examining intergranular attack of alloys under hydrothermal conditions, scientists from PNNL's ACMD Division Computational Mathematics group, Physical Sciences Division, and Energy and Environment Directorate developed a mathematical model that is directly comparable to experimental data in predicting how fast oxygen penetrates binary alloys and the resulting depletion of select elements in the materials that leads to failureIn their work examining intergranular attack of alloys under hydrothermal conditions, scientists from PNNL's ACMD Division Computational Mathematics group, Physical Sciences Division, and Energy and Environment Directorate developed a mathematical model that is directly comparable to experimental data in predicting how fast oxygen penetrates binary alloys and the resulting depletion of select elements in the materials that leads to failurein predicting how fast oxygen penetrates binary alloys and the resulting depletion of select elements in the materials that leads to failurein the materials that leads to failures.

She calculated that the escape dives her team monitored in narwhals required 97 percent of the animal's oxygen supply and often exceeded its aerobic dive limit (meaning depletion of oxygen stores in the muscles, lungs, and blood, followed by anaerobic metabolism).

One of the best ways to correct this oxygen depletion is by increasing the respiratory rate, and this often results in panting.

Professor Santilli (nominationed for the Nobel Prize in chemistry and physics) has raised the issue of atmospheric oxygen depletion — particularly in some of our largest cities around the world.

The observed depletion of oxygen and 14C in the deep N Pacific is consistent with a diffusive conveyor and should not be interpreted as evidence of an advective terminus of the GOC deep branch.

MPAs may also be able to counteract increasing incidences of nutrient - poor «ocean deserts» and depletion of oxygen in areas of the upper ocean, both of which are linked to climate change, according to the paper.

However, it remains a major scientific challenge to model and project the changes of the magnitude and intensity of subsurface oxygen depletion because it depends on changes in ocean circulation, rates of de-nitrification, and nutrient runoff from land, and because global data coverage for chemical and biological parameters remains poor.

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.

Further warming will likely cause the disappearance of Arctic summer sea ice, further oxygen depletion and the release of Earth - warming methane trapped in the Arctic seabed.

For example, if more methane remains tied up in the ocean depths, the microbial buffet will contribute more seriously to oxygen depletion, and a corresponding loss of biodiversity.

However, a double check of the diagram shows that it doesn't distinguish between organic and inorganic C in the deep and intermediate ocean, so the total amount of organic C within the ocean that is available to be oxidized at that rate (using O2 at a rate of 0.011 % of atmospheric O2 per year) could be larger; however, oxygen depletion in the deeper ocean water wouldn't pull O2 out of the atmosphere until that water resurfaced.)

The depletion of already low dissolved oxygen levels causes the volume of the OMZs to grow, disrupting primary producers in this and surrounding ecosystems.