Sentences with phrase «seawater temperature at»

All other environmental variables tested, including the UI (from April to September only), the PDO, silicate, nitrate and the seawater temperature at Tatoosh, were not associated with shell δ13C (Table 2).

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.

Not exact matches

The ratio of oxygen isotopes in seawater depends on the water temperature; the value of this ratio at any point in evolutionary time is «frozen» into the chemical composition of certain marine fossils.

The results show that blue crabs can — at moderate water temperatures — survive at oxygen levels as low as 1.3 milligrams per liter, just 15 % of the oxygen available in fully saturated seawater.

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 the study, published in the journal Proceedings of the Royal Society B: Biological Sciences, researchers at the UC Davis Bodega Marine Laboratory raised bryozoans, also known as «moss animals,» in seawater tanks and exposed them to various levels of water temperature, food and acidity.

The increase could be due to a combination of stronger winds spreading out the sea ice and fresh water from melting ice on land diluting seawater so it freezes at higher temperatures.

Most Antarctic researchers chalk this up to warm seawater melting the floating ice shelves at their bases; seawater temperatures there have risen since the 1970s, in part because of global temperature increases.

When seawater freezes it expels its salts, producing a layer of very dense, briny water at the freezing temperature.

Microbial communities in seawater from an Arctic and a temperate Norwegian fjord and their potentials for biodegradation of chemically dispersed oil at low seawater temperatures — Deni Ribicic — Marine Pollution Bulletin

The researchers analysed resting and active jumping oxygen consumption rates in snails exposed to seawater at the normal temperature of 29 °C and at the increased temperature of 34 °C, projected to be reached during the next 100 years due to global warming.

They were able to maintain this strong increase in oxygen uptake even when the seawater temperature was increased to 37 °C — a temperature at which coral reef fish can not even survive for a short time.»

«We knew that the environment was harsh, with -20 Celsius -LSB--4 degrees F] air temperatures and sea temperatures very close to the freezing point of seawater,» said Steve McPhail, head of AUV Development at the NOC, in a statement.

The facility has an 18,000 gal recirculating seawater system which supplies tanks in both indoor and semi-enclosed outdoor spaces with a constant supply of clean water at local environmental temperatures.

Maybe Trenberth thought our observations lacked a few data points, for example at the time he wrote that email, the observational evidence for seawater temperatures below 700 meters was, shall we say scant.

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.

That may seem small at first, but over time, especially when combined with other sources of sea level rise such as melting Greenland glaciers and the expansion of seawater as ocean temperatures increase, it adds up.

Instrumental data on seawater temperature, salinity, pH, dissolved oxygen, and chl a have been recorded every 30 min during the spring and summer months since 2000 at Tatoosh Island.

At first, the seawater was sampled using a bucket, hauling it onto the ship's deck and measuring the water temperature with a thermometer.

Explanations for this have included physiological barriers, an example being the decapod crustaceans, which have an inability to down - regulate blood magnesium levels sufficiently below that of seawater, leading to a loss of activity and eventual death at polar water temperatures [57].

The rest of the 100 + ppmv (80 ppmv since the measurements at the South Pole started) is NOT from the seawater temperature increase.

Even zero - degree seawater at outer continen tal shelf depths could expose ice shelves with deep grounding lines like the Totten (2.2 km), Moscow (2.0 km) and Shackleton (1.8 km) to temperatures more than 3 °C above their melting points.»

For the long - term experiment, the constant temperature regimes of the seawater bath were replaced with a seasonal cycle (adjusted monthly; see electronic supplementary material, figure S2) to match either historical mean monthly temperatures at the study site (ambient) or a warming scenario (ambient cycle +4 °C).

Aquaria in the short - term experiment were held in a seawater bath at a constant temperature (Titan 1500 chiller unit, Aqua Medic) to reflect either the annual mean temperature of the study site (10.24 ± 0.02 °C; see electronic supplementary material, figure S2) or a warming scenario of +4 °C (14.36 ± 0.12 °C; see electronic supplementary material, figure S2).

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).