Sentences with phrase «deep sediment cores»

Ding J, Li F, Yang G, Chen L, Zhang B, Liu L, Fang K, Qin S, Chen Y, Peng Y, Ji C, He H, Smith P, Yang Y (2016) The permafrost carbon inventory on the Tibetan Plateau: a new evaluation using deep sediment cores.

The researchers extracted nine - meter (30 - foot) deep sediment cores that they then analyzed in a laboratory.

Scientists sampled a 650 - foot deep sediment core from roll - front uranium deposits at an unmined site at Wyoming's Smith Ranch Highlands.

Dr. Edwards took deep sediment core samples to further understand the geology of the region including the unusual seafloor mound where these samples were collected.

Not exact matches

His team drilled sediment cores up to 10 meters deep.

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.

It's estimated that Lake Tuwuti sediments record up to 800,000 years of climate data, and Russell recently received funding to take deeper cores.

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.

Core samples from deeper in the Lake Towuti sediment will show whether this drying evident during the last ice age also happened in previous ice ages.

Gard found similar fossils deeper down in the sediment cores, indicating that the Arctic ice partially cleared at various times from about 128 000 to 71 000 years ago — a period covering the latest interglacial and the early part of the latest ice age.

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.

18Oc measured in foraminifera collected from deep sea sediment cores (Lisiecki et al., 2005).

By studying sediment cores from the deep Pacific near the Philippines, paleoclimatologist Lowell Stott of the University of Southern California in Los Angeles and his colleagues revealed that the temperatures of the deepest seas rose by around 2 degrees Celsius (3.6 degrees Fahrenheit) at least 1,000 years before sea - surface temperatures.

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.

However, foraminifera data are limited and difficult to obtain by deep - sea sediment coring, and the shells are not perfect proxies for ocean conditions.

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

Donnelly's team examined cores of sediment sampled from two of the salt pond's deepest points, searching for layers that were deposited when storms violently washed ocean sand into the 65 - acre waterway.

For Fred Singer, a climatologist at the University of Virginia and another co-author, the current warming «trend is simply part of a natural cycle of climate warming and cooling that has been seen in ice cores, deep sea sediments and stalagmites... and published in hundreds of papers in peer reviewed journals.»

Suppl., HR: 1340h AN: OS53B - 1101 Holocene Paleoceanography of the Chukchi Sea / Alaskan Margin, Western Arctic Ocean «A multi-proxy approach to the analysis of deep - sea sediment cores has been used to investigate paleoceanographical changes in the western Arctic.»

In my briefings to the Association of Small Island States in Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's models.

It is far more important to see whether there is a consistency between corals and deep sea sediment and ice cores and models than it is to validate someones spread sheet.

What is true is that there is very very strong evidence from paleoclimate data (deep sea sediment cores) for changes in the distribution of chemical tracers that must reflect changes in the deep circulation in the Atlantic.

This is not necessarily a contradiction to the other data series, because the two sediment cores used are located in the area of the deep outflow of Labrador Sea Water — but this is only one of two deep currents that together make up the southward part of the overturning circulation of the Atlantic, and thus the heat transport to the north.

Cores extracted from deep - sea sediment deposits contain evidence of earlier cold periods.

Proxy records of sea level are preserved in a variety of marine and terrestrial settings, such as sediments and organisms in deep ocean cores or once - submerged shorelines, and uplifted fossil reefs.

There are some detailed pages of information that have been meticulously reconstructed after having passed through the cross-cut shredder of geological history: the information from ice cores and the deep sea sediment cores are obvious examples.

Headed by University of Colorado scientist Yarrow Axelford, the study retrieved the sediment core from the bottom of a thirty foot deep lake on Baffin Island.

Avery also disputes the scientific consensus on global warming, ascribing the warming to «sunspots,» purportedly based on information about ice cores and deep ocean sediment deposits.

... The evidence comes from a close correlation between inferred changes in production rates of the cosmogenic nuclides carbon - 14 and beryllium - 10 and centennial to millennial time scale changes in proxies of drift ice measured in deep - sea sediment cores.

Evidence from ice cores and deep - sea sediment has shown that the Northern climate also cooled before the Southern climate during these abrupt changes, creating a «bipolar seesaw,» with the North cool while the South was warm, and the South cooling as the North warmed.

Thirty years ago when much of the research involved deep - sea sediment cores (fossils and chemistry) with millennial - scale intervals, there wasn't much data available to calculate meaningful confidence intervals.

Using evidence garnered from samples of glacial cores and deep sea sediment, paleoclimatologists can find patterns in the natural changes of the past and use them to predict future changes.

Beyond that are various isotopes isolated from ostracods etc. in deep sea sediment cores.

The principal dataset we use is the temporal variation of the oxygen isotope ratio (δ18O relative to δ16O; figure 1a right - hand scale) in the shells of deep - ocean - dwelling microscopic shelled animals (foraminifera) in a near - global compilation of ocean sediment cores [4].

Milankovitch's theory was largely ignored until, in 1976, a study based on deep - sea sediment cores in Antarctica substantiated that changes in temperature going back 450,000 years largely conformed to changes in the Earth's orbit.

Then he examined layers of sediment in these deep cores, using a suite of techniques to calculate the age of the sand, other rocks, and organic matter in each layer.

As part of the Dead Sea Deep Drill Core Project, Goldstein and other colleagues drilled deep below the lakebed of the Dead Sea in 2010 and 2011 to pull up more than 1,300 feet (400 meters) of sediment in a long column — a record of sediment deposits spanning 200,000 yeDeep Drill Core Project, Goldstein and other colleagues drilled deep below the lakebed of the Dead Sea in 2010 and 2011 to pull up more than 1,300 feet (400 meters) of sediment in a long column — a record of sediment deposits spanning 200,000 yedeep below the lakebed of the Dead Sea in 2010 and 2011 to pull up more than 1,300 feet (400 meters) of sediment in a long column — a record of sediment deposits spanning 200,000 years.