Sentences with phrase «ocean sediment data»

Strong evidence from ocean sediment data and from modelling links abrupt climate changes during the last glacial period and glacial - interglacial transition to changes in the Atlantic Ocean circulation.

«The data of the model simulation was so close to the deep ocean sediment data, that we knew immediately, we were on the right track,» said co-author Dr Laurie Menviel from the University of New South Wales, Australia, who conducted the model simulation.

Not exact matches

The researchers studied temperature measurements over the last 150 years, ice core data from Greenland from the interglacial period 12,000 years ago, for the ice age 120,000 years ago, ice core data from Antarctica, which goes back 800,000 years, as well as data from ocean sediment cores going back 5 million years.

The team, led by Dr Kira Rehfeld and Dr Thomas Laepple, compared the Greenland data with that from sediments collected in several ocean regions around the globe, as well as from ice - core samples gathered in the Antarctic.

Real - world data back the claim: Accumulations of calcium carbonate in deep - sea Pacific sediments show that the Pliocene ocean experienced huge shifts at the time, with waters churning all the way from the surface down to about three kilometers deep, as would be expected from a conveyor belt — type circulation.

Other papers in the issue examine how deep sea sediments may affect seismic wave readings, and evaluate how the Cascadia Initiative's data collection from ocean bottom seismometers has improved over the first three years of the study.

«Thanks to the sediment core data, we have clear evidence that, during the last interglacial roughly 125,000 years ago, the central Arctic Ocean was still covered with sea ice during the summer.

Combining the seismic data with measurements from sediment samples previously retrieved from this region through ocean drilling, they found that while the thickness of the incoming sediment is similar offshore of Washington and Oregon, the compaction is very different.

To untangle the impacts that these three climate stressors will have on seafloor diversity in the future, the researchers examined existing published data and collected new data on organisms living in deep - sea sediments in upwelling regions along continental margins, where the ocean and continental crusts meet along the seafloor.

The new findings on Arctic Ocean salinity conditions in the Eocene were calculated in part by comparing ratios of oxygen isotopes locked in ancient shark teeth found in sediments on Banks Island in the Arctic Circle and incorporating the data into a salinity model.

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.

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

Ice core data from Antarctic from ocean sediments show 8 episodes of very large ice flux — largest 14,600 years ago, meltwater pulse 1a — 1 - 3 meters sea level rise per century for several centuries.

Paleoclimatology data are derived from natural sources such as tree rings, ice cores, corals, and ocean and lake sediments.

Now the locations of avaialble proxy data (tree rings, ice cores, ocean sediment records, corals etc.) are not necessarily optimally spread out, but the spatial sampling error is actually quite easy to calculate, and goes into the error bars shown on most reconstructions.

For instance, here's the data for delta - oxygen - 18 from a stack of 57 ocean sediment cores, which is considered an excellent proxy for global ice volume, known as the «LR04 stack» (from Lisiecki, L.E., & Raymo, M.E. 2005.

Independent non-thermometer data (so - called proxies, like tree rings, ice cores, ocean sediments, stalagmites, etc.) also show no warming trend between 1978 and 2000.

On the contrary, independent data on both ocean sediments in the Sargasso Sea and dendrology favor repeated strong temperature oscillations with comparably large gradients in historic times.

This «new evidence» is based on a single analysis of «proxy» data (that is, data that do not come from thermometers but rather from sources like tree rings, ice cores, corals, and ocean and lake sediments) showing the twentieth century to be the warmest in the past thousand years.

Proxy data such as those generated from ice core samples, measurements of tree rings intervals, bore samples taken from sediments from the ocean and sea floor, and measurement of gases from bubbles trapped in ice are some examples of preserved physical characteristics of the past used by scientists to reconstruct prevailing climatic conditions in the past.

Data from an ocean glider equipped with a host of scientific instrumentation and deployed ahead of the storm allowed researchers not only to see how sediment was being redistributed by the hurricane as the storm unfolded but also to compare their real - life observations with forecasts from mathematical models.

Climate forcings due to past changes in GHGs and surface albedo can be computed for the past 800000 years using data from polar ice cores and ocean sediment cores.

Here we use dust deposition data and temperature reconstructions from ice sheet, ocean sediment, and land archives to construct dust − climate relationships.

There are now several alternative proxy measures of ancient climate change, but the δ18O data (figure 1a) of Zachos et al. [4], a conglomerate of the global ocean sediment cores, is well suited for our purpose as it covers the Cenozoic era with good temporal resolution.

In recent years there have been many studies collecting data from ice cores in Greenland, sediments drilled from the ocean floor and from continental lakes, and so forth.

Paleoclimatology data are derived from natural sources such as tree rings, ice cores, corals, and ocean and lake sediments.