Sentences with phrase «organic carbon from»

They found that erosion of permafrost releases a total of 36 million kilograms of organic carbon from the Yukon Coastal Plain into the Beaufort Sea annually.

Methane production is accelerated even more in areas dominated by sedges, grasslike plants that exude more easily altered forms of dissolved organic carbon from their roots.

March 20, 2018 Researchers analyzed dissolved organic carbon from water column samples collected in five regions to establish baseline data about its relative persistence and cycling in the northern Gulf of Mexico.

The dissolved organic carbon from the Amazon Rivers spreads into the Atlantic Ocean to be decomposed by solar radiation.

«The export of terrestrial dissolved organic carbon from inland water to the ocean is faster than its photochemical mineralization in the inland waters.

The scientists focused on the ocean's biological pump, which exports organic carbon from the euphotic zone — the well - lit, upper ocean — through sinking particulate matter, largely from zooplankton feces and aggregates of algae.

The authors aren't yet sure why the organic carbon from the more developed watersheds is less vulnerable to breakdown by sunlight in rivers and streams, but suggest that it might be because it has already been exposed to appreciable sunlight in the less shady urban and agricultural environment.

Not exact matches

You can also select organic produce or materials from companies that offset their carbon footprints.

Darin Kingston of d.light, whose profitable solar - powered LED lanterns simultaneously address poverty, education, air pollution / toxic fumes / health risks, energy savings, carbon footprint, and more Janine Benyus, biomimicry pioneer who finds models in the natural world for everything from extracting water from fog (as a desert beetle does) to construction materials (spider silk) to designing flood - resistant buildings by studying anthills in India's monsoon climate, and shows what's possible when you invite the planet to join your design thinking team Dean Cycon, whose coffee company has not only exclusively sold organic fairly traded gourmet coffee and cocoa beans since its founding in 1993, but has funded dozens of village - led community development projects in the lands where he sources his beans John Kremer, whose concept of exponential growth through «biological marketing,» just as a single kernel of corn grows into a plant bearing thousands of new kernels, could completely change your business strategy Amory Lovins of the Rocky Mountain Institute, who built a near - net - zero - energy luxury home back in 1983, and has developed a scientific, economically viable plan to get the entire economy off oil, coal, and nuclear and onto renewables — while keeping and even improving our high standard of living

This organic whole that began from an initial high bang and eventuated into the present universe is distinguished by a form of unity and diversity radical beyond all imagining: infinite differences, and diversity that is marked not by isolation but by shared atoms over millennia as well as minute - by - minute exchanges of oxygen and carbon dioxide between plants and animal.

Nearly 61 to 62 gigatons of carbon are lost from this pool as soil organic matter is oxidized by the atmosphere through tillage and erosion.

Sustainable coffee agrosystems frequently rely on fallen leaves from their shade trees as well as the application of coffee skins and other organic matter for soil moisture retention and fertilization, providing another means in which these farms can contribute to carbon sequestration.

The regenerative agricultural practice of carbon farming on organic dairy farms is helping move carbon from the atmosphere and put it back into the soil.

Tilling results in soil organic matter being broken down much more rapidly, and carbon is lost from the soil into the atmosphere.

Dr Parr has been investigating the potential for soil organic carbon sequestration by bamboo leaf litter in collaboration with researchers from the Fujian Academy of Forestry Sciences in south - east China.

According to Ms Clare Hughes from CHOICE, there is an increasing appreciation of accreditation schemes for food products — such as organic, free range, fair trade, and carbon - reduction labelling schemes.

As the price of food goes higher and higher and we worry more and more about where our food comes from, organic vs. conventional (pesticide - laden), genetically - modified organisms, carbon emissions and climate change, it makes sense to me to try to grow some of our own food.

Atmospheric carbon dioxide derives from multiple natural sources including volcanic outgassing, the combustion of organic matter, and the respiration processes of living aerobic organisms; man - made sources of carbon dioxide come mainly from the burning of various fossil fuels for power generation and transport use.

A molecular cloud is an interstellar cloud of dust, gas, and a variety of molecules ranging from molecular hydrogen (H2) to complex, carbon - containing organics.

When that happens, the hybrid membrane switches from having a single channel to transport carbon dioxide, in which the molecules must go through the polymer, to two channels, in which the molecules can either move through the polymer or through the metal - organic framework highways.

Using a six - square - mile test plot, they found that the organic carbon comes from shallow ponds that were dug to provide soil for flood protection.

Determining the rate of old carbon release from permafrost had been a challenge for researchers, since vegetation that grows in thawed permafrost in forest and tundra systems releases its own modern organic carbon into soils, which readily decomposes and dilutes the «old carbon» signal from thawing permafrost soils.

To their surprise, the researchers found that the samples from the thermokarst sites had lower levels of colored dissolved organic matter than did reference sites, suggesting that the carbon in the deeper soils exposed by thermokarst failure is significantly different from the carbon draining from the topmost, active layer of the permafrost, the team reports in the Proceedings of the National Academy of Sciences.

Freshwater such as lakes, though, receive various sources of carbon dioxide from decomposing organic and inorganic matter swept into them, which makes it hard for scientists to distinguish between the direct effects of rising atmospheric CO2 and these other elements.

From remote observations, the team assumes that Bennu should contain water and organic — or carbon - rich — material, but they don't know yet how this material is distributed across the surface.

«The deposition of compounds such as sugars and organic acids from living roots can increase the activity of bacteria and fungi, and it's this increase in activity that accelerates the decomposition of carbon in the soil, leading to higher CO2 emissions,» Sulman said.

One involves organic molecules — not the pricey kind from Whole Foods, but molecules that contain carbon.

The team used stable isotope labels to trace plant litter - derived carbon and nitrogen as the litter decomposed and formed soil, specifically the fraction of soil called organic matter, which comes from plant inputs and microscopic animals.

Biochemist Lars Thelander at the announcement from the Royal Swedish Academy of Sciences: «Palladium - catalyzed cross-coupling has made it possible to synthesize carbon based molecules, for example, new medicines, agricultural chemicals and organic compounds used in the electronics industry.»

That could explain two other anomalies from the era's geologic record, Lenton says: the large amounts of organic - rich shale that were deposited as nearshore sediments and the unusually high proportion of carbon - 13 isotopes in the rocks.

The study also shows that wetlands, thought of as a useful tool for conservation and carbon sequestration, may require consistent flooding to realize environmental benefits from organic matter accumulation.

The results revealed that dissolved organic carbon is efficiently removed from ocean water when heated.

Yet there is always some leftover organic material, consisting of carbon, nitrogen, and minerals, which remains sequestered in the soil, somehow prevented from further decomposition.

The results showed that mature forest stands stored significantly more soil organic carbon in strongly mineral - bound and stable carbon pools than did soils from cut stands.

When he tested soils from the experimental plots, he saw soil organic carbon concentrations rise gradually with increases in nitrogen fertilization at soil depths from 0 to 6 inches, although not at deeper ones.

When converting carbon dioxide from the atmosphere into a sugar, plants use an organic catalyst called an enzyme; the researchers used a metal compound called tungsten diselenide, which they fashioned into nanosized flakes to maximize the surface area and to expose its reactive edges.

The heterotrophs receive the organic carbon they need to grow from the anammox bacteria in the form of several specific molecules, the researchers discovered in the study.

That significant amounts come from respiratory processes means that the decomposition of terrestrial organic carbon in running waters may be higher than previously thought.

Hayes and his colleagues looked at organic compounds from sediments formed between 1.8 billion and 550 million years ago, and found that simple hydrocarbons from the sediments contained more carbon - 13 than more complex organic molecules.

The data come from deep - sea sediment cores dating to 205 million years ago that contain inorganic carbon - rich minerals as well as the organic remains of single celled marine phytoplankton.

Soil carbon decomposition, which is temperature sensitive, is a potentially important source of greenhouse gases, which could create a positive feedback to global climate change through the release of greenhouse gases from decomposing organic matter.

«Even fungi and bacteria have to breathe, and when they do, through the degradation of terrestrial organic carbon, they release carbon dioxide, which makes up about 30 percent of all carbon dioxide released from streams and rivers,» explains Erin Hotchkiss, a researcher at the Department of Ecology and Environmental Science, Umeå University.

Scientists from Tomsk Polytechnic University together with their colleagues from USA and Japan have proposed a novel way to address the most important and fundamental challenge of organic chemistry, i.e. breaking a bond between carbon and hydrogen atoms to form new organic substances.

If it is Martian in origin, the carbon may be from organic hydrocarbons or inorganic carbonates.

Cyanobacteria, which still exist in a similar form today, probably started using energy from sunlight to photosynthesize some of the carbon dioxide in the atmosphere into organic compounds.

Hundreds of yards below the seafloor, microbes called archaea produce methane from hydrogen and carbon extracted from organic sediments.

A new study led by researchers at the Virginia Institute of Marine Science reveals that land use in the watersheds from which this «dissolved organic matter» originates has important implications for Bay water quality, with the organic carbon in runoff from urbanized or heavily farmed landscapes more likely to persist as it is carried downstream, thus contributing energy to fuel low - oxygen «dead zones» in coastal waters.

Attendees at the astrobiology meeting in Arizona showcased an assortment of high - tech devices for next - generation exploration, ranging from microfluidic «life analyzers» and integrated nucleic acid extractors for studying «Martian metagenomics» to exquisitely sensitive, miniaturized organic chemistry labs for spotting tantalizing carbon compounds and minerals at microscopic scales.

This taste of carbon is intriguing, but it is a far cry from recent feverish speculation that the rover had found definitive evidence for organic compounds on Mars.

While the team's research showed no significant difference in bacterial degradation of organic matter from cleared or forested watersheds, Canuel says it did show that «organic carbon in runoff from watersheds affected by human activity is less susceptible to solar degradation than that from forested watersheds.»