Sentences with phrase «marine sediment»

They analyzed marine sediment cores drilled off shore near East Antarctica and about 2.9 kilometers (1.8 miles) below sea level.

The scientists initially determined the rate of the LIS collapse using «radiocarbon dates of organic matter and marine shells, cosmogenic dates from the surface of boulders, and the composition of isotopes in marine sediment cores», but then the scientists also used a state - of - the art climate model to see if its results would bear out the paleoclimate data.

Marine sediment cores gathered near the western ice sheet provide some indirect evidence for the melting, as they show increased abundance of marine life during the Eemian.

Appenzeller (1991); «gun»: Kennett and Stott (1991), updated with evidence from other epochs («mounting geologic evidence for past pervasive, massive CH4 releases from the marine sediment reservoir») by Kennett et al. (2000), see Kennett (2002); Koch et al. (1992); Dickens et al. (1995); Norris and Röhl (1999); Katz et al. (1999); Nunes and Norris (2006); an overview is Kunzig (2004).

Shallow - marine sediment cores record climate variability and earthquake activity off Lisbon (Portugal) for the last 2000 years.

Paleoclimate records from ice cores, marine sediment cores, and speleothems (stalagmites and stalactites) have demonstrated that abrupt Northern Hemisphere cooling and Southern Hemisphere warming occurred in response to Heinrich events.

Nd, Sr, and Pb isotopes were measured on the 63 — 150 μm, de-carbonated marine sediment for the period 24 — 10.5 14C ka, from marine sediment core EW9303 - GGC31, collected from the top of Orphan Knoll, a topographic high 550 km northeast of Newfoundland, Canada.

Marine sediment record from the East Antarctic margin reveals dynamics of ice sheet recession.

Coincidentally (or not), the marine sediment core that I am currently working on shows a large 20th century warming signal as well.

Marine sediment cores cover a broader area — nearly 70 percent of the Earth is covered in oceans — but they only give tiny hints about the climate over the land.

Like marine sediment cores, an ice core provides a vertical timeline of past climates stored in ice sheets and mountain glaciers.

They used data from the past 8,000 years, particularly studying the climate and water changes in the Sierra Nevada mountains and cross-referencing it against the history of Pacific through marine sediment.

The first fossil pollen of maize, a Latin American species, appears in marine sediment in Europe in 1600, becoming common over subsequent centuries.

Constraints on the amplitude of Mid-Pliocene (3.6 - 2.4 Ma) eustatic sea - level fluctuations from the New Zealand shallow - marine sediment record.

In fact, marine sediment eDNA concentrations have been shown to be 3 orders of magnitude higher than seawater eDNA (Torti et al 2015).

Proof of past climatic conditions found in terrestrial plant waxes Niedermeyer and her colleagues worked on a marine sediment core which was collected off the coast of western Sumatra at a depth of 481 meters.

The team also correlated their findings with other studies of California climate history, and for the first time, cross-referenced these with histories of the Pacific Ocean's temperature taken from marine sediment cores and other sources.

About 104 stages of these cold and temperate cycles have been recognised in deep ocean marine sediment cores (Figure 1)[1].

It is therefore important, using instrumental records and proxies (such as ice cores, or microfossils in marine sediment cores), to compare current trends with those in the past [3].

http://www.nature.com/nature/journal/v470/n7333/full/nature09751.html Corrected online 14 April 2011 Erratum (April, 2011) ``... results, based on TEX86 sea surface temperature (SST) proxy evidence from a marine sediment core...»

We also don't yet know whether Europa's oceans come with a handy, nutrient rich layer of marine sediment.

Tierney and her colleagues had successfully revealed the Horn of Africa's climate back to 40,000 years ago by studying cores of marine sediment.

In contrast, material shed almost continuously from continents is preserved as marine sediment that can be analysed to infer the time - varying state of major ice sheets.

It assumes that organic material is not contaminated with older radiocarbon (which, for example, is a common problem with organic material from marine sediment cores around Antarctica).

Marine sediment cores will reveal records of past glacial - interglacial cycles while lake sediments and peat cores will reveal climate records since the last ice age.

How are microbial communities assembled in the > 5,000 - y - old subsurface of marine sediment, and do they undergo adaptive evolution or accumulate mutations due to impaired DNA repair under such energy - limited conditions?

Radiocarbon dates from marine sediment cores across the continental shelf provide an indication of ice marginal positions during recession.

Marine sediment core collection from the South Georgia shelf on the RRS James Clark Ross in 2012 (JR257, Photo credit, Fred Wobus)

Now, new evidence from a marine sediment core from the deep Pacific points to warmer ocean waters around Antarctica (in sync with the Milankovitch cycle)-- not greenhouse gases — as the culprit behind the thawing of the last ice age.

To answer this question, the researchers analyzed marine sediment cores collected off Galicia (Spain) and from the Bay of Biscay, containing pollen and foraminifera, microscopic marine organisms with calcareous skeletons.

«The first step was to reconstruct the history of global mean temperatures for the last 784,000 years, using combined data from marine sediment cores, ice cores, and computer simulations covering the last eight glacial cycles,» said Friedrich, a post-doctoral researcher at IPRC.

Left: Marine sediment core sample from the South Atlantic with fossilised partially dissolved shells of planktonic organisms.

Analysing new data from marine sediment cores taken from the deep South Atlantic, between the southern tip of South America and the southern tip of Africa, the researchers discovered that during the last ice age, deep ocean currents in the South Atlantic varied essentially in unison with Greenland ice - core temperatures.

In April 2007 Calabrian authorities had temporarily halted fishing in waters off Cetraro (where the Cunski lies, according to a turncoat from the» Ndrangheta mafia) because of dangerous levels of heavy metals in marine sediment.

More than half of them live buried in marine sediment; about 70 trillion reside in and on your body.

Up until now, instrumental observations of the oceans have only spanned the last 100 years or so, whilst reconstructions using marine sediment cores come with significant age uncertainties.

The researchers analyzed a marine sediment core collected off the coast of the Eastern Cape of South Africa, close to where the Great Kei River meets the ocean.

The scientists studied a marine sediment core off the coast of South Africa and reconstructed terrestrial climate variability over the last 100,000 years.

And so a team of marine sediment experts has set up shop on the Nathaniel B. Palmer, hoping to sink great hollow cores deep into the ocean off Antarctica.

So far, ice cores from Greenland and marine sediment cores from Antarctica show that a notable warming period occurred from 3,000 to 8,000 years ago.

During an impact, clay could have trapped substantial amounts of the organic molecules formed in the same event, and then settled as marine sediment, the researchers say.

Carried within the water column, accumulating on the ocean bottom or becoming entrained in marine sediments — a spill of Alberta bitumen might prove impossible to contain.

In a recent study, a team of researchers from the University of Sydney's School of Geosciences has designed a new model that simulates sediment transport from mountains to coasts, reworking of marine sediments by wave - induced currents, and development of coral reefs.

These 1.9 billion - year - old marine sediments are from the East Arm of the Great Slave Lake, Canada.

Image of a hydrothermal vent field along the Arctic Mid-Ocean Ridge, close to where «Loki» was found in marine sediments.

«It doesn't have internal layering like marine sediments normally do,» says Garcia - Castellanos, who was also a co-author of the new study.

Now, over the coming weeks, a team of international researchers are returning to offshore Sumatra to collect marine sediments, rocks and fluids from this particular zone for the first time to gain a better understanding of the materials and to collect data for predicting how they behave in fault zones to generate large earthquakes.

In 2017, the team will start to collect marine sediments to look for signs of habitation, such as stone artefacts or ancient human DNA.

«We made several cross-sections of hundreds of metres of basin sediments and we determined the exact positions of ash beds contained in these marine sediments,» explained Björn Baresel, first author of the study.

Permian - Triassic boundary in shallow marine sediments, characterised by a significant sedimentation gap between the black shales of Permian and dolomites of Triassic age.