Sentences with phrase «by seawater at»

Shakhova says it may have been going on since the frozen shelf was inundated by seawater at the end of the last ice age.

Not exact matches

«Ocean acidification can affect individual marine organisms along the Pacific coast, by changing the chemistry of the seawater,» said lead author Brittany Jellison, a Ph.D. student studying marine ecology at the UC Davis Bodega Marine Laboratory.

One hint of weak coupling at a subduction zone is the presence of serpentinite — a mineral formed when seawater carried down by a descending plate reacts with mantle rock.

It also caused a decrease in precipitation by approximately 70 - 85 percent on land and a decrease of approximately 5 - 7 °C in seawater temperature at a 50 - m water depth, leading to mass extinction of life forms including dinosaurs and ammonites.

Because they form by leakage of methane into seawater it implies that something at that time caused a large release of methane into the ocean.

Max's invention also avoids a brine - disposal issue by removing only a small amount of freshwater at a time, about 5 percent per volume of seawater in the reactor.

In August 2011, scientists at the UC Davis Bodega Marine Laboratory walked into their labs to a strange, disturbing sight: Thousands of purple sea urchins and other marine invertebrates were dead in their tanks, which are fed directly by seawater.

Jackson, a volcanologist by training who led an earlier study at the ALS on Roman seawater concrete, is the lead author of a paper describing this study in the Proceedings of the National Academy of Sciences (PNAS) titled «Mechanical Resilience and Cementitious Processes in Imperial Roman Architectural Mortar.»

Biologist Eva Egelyng Sigsgaard at the Natural History Museum of Denmark at the University of Copenhagen and her team collected seawater containing skin cells — along with cells from urine and feces — naturally shed by the whale sharks and other animals.

The Calera process essentially mimics marine cement, which is produced by coral when making their shells and reefs, taking the calcium and magnesium in seawater and using it to form carbonates at normal temperatures and pressures.

In any case, a new market analysis by Lux Research forecasts that the global desalinated water supply will grow at a compound annual growth rate of 9.5 percent during the next decade as Australia, Israel, Singapore, California and others build desalinization plants for seawater and inland brackish water as well as for water recycling.

At present, the ocean takes up a quarter of the CO2 - released to the atmosphere by human industrial activities — with long - lasting consequences for the chemical composition of seawater and marine habitats.

By employing a technique they developed that involves collecting methane from roughly ten thousand gallons of seawater per sample, they made a surprising discovery: ancient - sourced methane is indeed being released into the ocean; but very little survives to be emitted to the atmosphere, even at surprisingly shallow depths.

At the heart of the exhibition is the huge ocean tank where visitors walk through a transparent underwater tunnel surrounded by 225 tonnes of seawater.

At Waipapa Bay, the Kaikōura quake lifted up submerged rock by several meters, trapping seawater.

And even if we assume it's accurate, when we consider that pH naturally rises and falls by about + / -0.5 over the course of a single decade, this means that natural changes in seawater pH occur at rates 100s of times faster than the trend attributed to anthropogenic CO2.

The sinking process was observed and filmed in large transparent cylinders filled with seawater at OceanLab Bremen by Dr. Pedro de Jesus Mendes.

To chronicle this and other successes, the special issue focused on «Uranium in Seawater» amasses research presented by international scientists at ACS's spring 2015 meeting in Denver.

According to new research by Thomas Weber, an assistant professor of Earth and environmental sciences at the University of Rochester, small microenvironments in the deep ocean may hold key clues to the global cycling of nitrogen in seawater.

On December 6, a short drive from the canyons of high - rises making up the city - state's turbocapitalist business district, elites and journalists assembled at the Souk Madinat — a beachside network of malls, restaurants, and luxury hotels connected by artificial seawater canals — for the opening night of the 14th Dubai International Film Festival.

Channelkeeper also collected kelp near Rincon as part of «Kelp Watch» an initiative coordinated by researchers at Cal State Long Beach and UC Berkeley to assess the extent of possible radiation contamination (primarily Cesium - 137 & -134) in kelp forests along the West Coast from seawater arriving from Fukushima.

While Eckert et al. (2013) propose a decreased seawater input or increased river input as potential causes, van der Meer et al. (2008), in contrast, suggest that the absence of a shallow chemocline can be best explained by the high sea - surface salinity at the time.

(A point made with a vivid irony by Arthur C. Clarke at the end of one of his «Tales From The White Hart» (paraphrased): «It's quite probable that even now, molecules of the late professor are passing through the very seawater filter that he devised...»)

Diffuse Attenuation Coefficient at 490 nm measures absorption of blue light (490 nm) in the top 50 m or so of seawater (largely) by suspended biomass.

Wattenberg: no problem for me, Wattenberg measured the pCO2 of seawater, Beck interpretes the measurements at 0 m depth as being from the atmosphere, while it is from seawater at the surface... The data are grossly reproduced by modern sea cruise investigations.

Thus there are three restraints placed on the solute molalities at 288K by the known properties of average seawater.

The open cycle consists of the following steps: (i) flash evaporation of a fraction of the warm seawater by reduction of pressure below the saturation value corresponding to its temperature (ii) expansion of the vapor through a turbine to generate power; (iii) heat transfer to the cold seawater thermal sink resulting in condensation of the working fluid; and (iv) compression of the non-condensable gases (air released from the seawater streams at the low operating pressure) to pressures required to discharge them from the system.

Seawater data collected by a Hydrolab DataSonde (Hach Company, Loveland, CO) since 2000 show that the ocean at this site has undergone a sustained decline in pH over the past decade [2] at a rate that is an order of magnitude greater than expected based on model predictions [13] and the equilibrium response to rising atmospheric CO2 concentration.

Modulated by ocean alkalinity, at 400 ppm atmospheric CO2, surface seawater declines to pH 8.2 or 8.1 (blue curve).

For a long time people thought that ocean pH was regulated ultimately by reactions between deep seawater and sediments, but as Walt Allensworth February 5, 2015 at 3:08 pm, says there are so many black, and clear, vents along the midocean ridges spewing acidic water, that these probably maintain ocean pH instead.

May said that Natural Resources Canada has conducted a similar study in Alberta, yet she added that research, dating back to 2015 and done at the Bedford Institute of Oceanography by the Department of Fisheries and Oceans (DFO) using actual seawater, found that bitumen and diluent separated, and the bitumen formed oil balls around bits of particulate and sank.

Im agree some mitigation is needed as well but the example they are now discussing eg of correcting the SA end of the Murray by flushing it with seawater does nothing to address the overallocation of water rights (and excessive extraction of water at the upper end).

Radiation from a molecule at -80 C therefore can not provide enough energy in the form of photons, to warm molecules (by boosting electrons into higher, more energetic orbits) at -4 C or above (seawater temperatures).