Sentences with phrase «of ocean productivity»

21 March, 2018 — Runaway climate change will alter the pattern of ocean productivity and circulation and play perhaps irreversible havoc with fish catches.

In many parts of the ocean the productivity of phytoplankton — microscopic plants at the base of the marine food chain — is limited by the availability of dissolved iron.

Not exact matches

«Understanding nitrogen cycling is crucial to understanding the productivity of the oceans as well as the global climate,» he said.

Both processes occur in regions of the ocean that are naturally low in oxygen, or anoxic, due to local lack of water circulation and intense phytoplankton productivity overlying these regions.

While the addition of iron to forest - size patches of ocean might help mitigate global warming, it is even more important that we use it to mitigate the decline in the ocean's primary productivity.

The lab results are now being integrated into biogeochemical models, which calculate the productivity of the ocean of the future and the limits of carbon storage.

Scientists say reserves can help marine ecosystems and people adapt to five key impacts of climate change: ocean acidification; sea - level rise; increased intensity of storms; shifts in species distribution, and decreased productivity and oxygen availability.

That was the key message of a new study recently published in the journal Science, in which American and German biologists defined the first universal principle on the combined effects of ocean warming and oxygen loss on the productivity of marine life forms.

In this regard, one of the key questions is: How will the warming of the oceans and resultant decrease in dissolved oxygen impact marine life forms» productivity?

This global biological recordbased on daily observations of ocean algae and land plants from NASAs Sea - viewing Wide Field - of - View Sensor (SeaWiFS) missionwill enable scientists to study the fate of atmospheric carbon, terrestrial plant productivity and the health of the oceans food web.

It's the primary cause of the collapse of primary productivity in the oceans.

There have been hints that there's more biological productivity in the Arctic Ocean than once suspected (perhaps helped along by climate change): In 2012, scientists reported seeing massive blooms of algae proliferating under the sea ice.

The researchers looked specifically at the average fishing revenue in 106 Alaskan communities for 10 years before and after 1989, a year when the North Pacific Ocean experienced a significant shift in productivity and abrupt changes in the composition of marine food webs, while at the same time the global price for salmon dropped because of competition from farm - raised fish.

Now, using two deep cores collected at two Ocean Drilling Program sites in the Southern Ocean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyOcean Drilling Program sites in the Southern Ocean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyOcean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cycles.

Changing temperatures and ocean acidification, together with rising sea level and shifts in ocean productivity, will keep marine ecosystems in a state of continuous change for 100,000 years.

When that edge moves off the continental shelf into deep open ocean waters, the productivity drops off and the marine organisms that feed larger wildlife are out of reach, scientists say.

Studying more lakes could also reveal whether their discharges of minerals affect the chemistry and biological productivity of the Southern Ocean.

Rising temperatures, for example, could either increase or decrease biological productivity,» Salawitch says, as well as the emission of certain less - prevalent gases that are exchanged between the air and ocean.

They found the same pattern occurring across continents and various ocean locations — as well as across various levels of productivity and diversity — all of which showed shifts in the way symbiotic organisms interacted.

Earlier this year, researchers discovered that periods when the ocean had high levels of trace elements — like zinc, copper, manganese and selenium — seemed to overlap with periods of high productivity, including the Cambrian explosion, when most groups of living animals first appeared.

«However, only a small part of this iron reaches the surface layers and the open ocean where biological productivity is limited by iron,» Florian Scholz explains.

The team — from Southampton, the University of Cape Town and the Norwegian Institute for Air Research — conducted three research voyages in 2010 investigating ocean productivity in the area affected by ash from Eyjafjallajökull.

Rising ocean temperatures will alter the productivity and composition of marine phytoplankton communities, thereby affecting global biogeochemical cycles.

Climate change is thus inseparable from ocean change, and our ability to understand these changes relies heavily on our understanding of ocean ecosystems and, more specifically, the role of iron in regulating ocean productivity and hence the global carbon cycle and climate.

Together with shipboard and satellite data, the global network of measuring sites provides further understanding of the ocean - atmosphere system and its influence on global climate and biological productivity.

Environmental regulation of primary productivity in aquatic ecosystems, physiological ecology of phytoplankton, hydrological optics, integrated ocean observatories.

«You're threatening the basic productivity of the ocean.»

But we wanted to observe the natural development of the plankton ecosystem from the first productivity in late winter until summer, closely monitor the succession of the plankton communities and follow how effects of ocean acidification are transmitted from one generation to the next,» Riebesell explains.

Occasionally, upwelling events increase the productivity in these ocean deserts: Oceanic eddies transport deep - water containing high concentrations of nitrate, phosphate and silicate, towards the surface.

The 30,000 square feet of inspiring and innovative space overlooking the Atlantic Ocean sets the stage for collaboration, motivation, and productivity.

While spectacular views of the ocean bring people together in a completely different way it's a place where productivity can be measured in line charts or in tan lines.

Named one of Time Magazine's «Heroes for the Planet,» Earle is a former chief scientist for the National Oceanic and Atmospheric Administration and founder of SEAlliance, which partnered with National Geographic on Mission Blue to further global initiatives aimed at restoring health and productivity to the ocean.

Fertilizing the surface ocean with iron increases biological productivity, but the resulting carbon dioxide removal will be much less than expected due to the increased productivity of diatoms, which incorporate and remove the bioavailable iron.

The shift from a multiyear to seasonal ice cover has significant implications for the heat and mass budget of the ice and for primary productivity in the upper ocean.

As the global demand for animal protein grew more than fivefold over the second half of the twentieth century, humans began to press against the productivity constraints of the world's rangelands and oceans.

And just as increased algal productivity at sea increases the emission of sulfur gases to the atmosphere, ultimately leading to more and brighter clouds over the world's oceans, so too do CO2 - induced increases in terrestrial plant productivity lead to enhanced emissions of various sulfur gases over land, where they likewise ultimately cool the planet.

We don't have good information on the base of the food chain for most of the past — that's just «noise» but now that we start having ways to track trends in primary productivity — what's being made out of sunlight, water and CO2, by which organisms, and how fast do their populations change (remembering that some plankton populations turn over a new generation in a couple of weeks so relative numbers of different species can change that fast across the oceans).

There is another important angle to the ocean productivity issue that you might consider — there is a very real danger that the satellites that provide climate - research quality observations of this kind will not be available in the near future due to limited budgets and other priorities.

Upwelling in the northwest Indian Ocean provides sufficient surface productivity to provide an excess of organic matter to sediments on the continental slope of the Arabian Peninsula where the oxygen minimum zone intersects the slope.

The 10 Earth System Models used here project similar trends in ocean warming, acidification, deoxygenation and reduced primary productivity for each of the IPCC's representative concentration parthways (RCP) over the 21st century.

Obviously, the most important affects of ocean acidification would be on living organisms in the ocean thereby affecting primary productivity.

The impacts of anthropogenic climate change include decreased ocean productivity, altered food web dynamics, reduced abundance of habitat - forming species, shifting species distributions, and a greater incidence of disease.

In the ocean, we need to consider better the controls on thermohaline circulation, on potential changes in biological productivity, and on the overall stability of the ocean circulation system.

But between 2000 and the present, researchers found that as the oceans warmed and became more stratified, phytoplankton productivity declined by 190 million tons of carbon each year.

«There can be no improvement in the well being and productivity of our nation's waters without political action, and I'm proud to be associated with Ocean Champions and its focus on supporting policy through advocacy to elect like - minded political representatives.»

Even if the northern ocean increases in productivity in the future, it will barely be enough to maintain current levels of fish consumption.

If entering the «climate drivers equation» is now the increasing activity of tropical (or extra-tropical) ocean cyanobacterial productivity (driven by the CO2 fertilization effect including the effect of the anthropogenic nitrogen discharges to coastal oceans), then what can we say about the strength of future El Ninos and La Ninas and the predictability of the PDO?

You know, for a little while there I even thought that Bob T himself (who is undoubtedly an interesting fellow) might even be sharp enough to appreciate that the coupling of increased atmospheric CO2 and increased seawater N nutrient levels to produce enhanced cyanobacterial productivity in near surface layers of the oceans would also produce the weather - moderating effects listed above (particularly in the areas where tropical storms are «brewed»).

Physical properties of the water and satellite estimates of primary productivity were used separately to describe 25 different water masses in Australia's oceans, identified by different circulation regimes and oceanographic features.

Fifth, warming of the oceans may have serious impacts on fisheries productivity, and ocean acidification from the carbon dioxide humanity is pouring into the atmosphere may have even more serious consequences for the harvest from the sea.