Ví dụ về việc sử dụng Sediment cores trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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But even moresignificant was their second finding in the lake sediment cores.
By using the lake sediment cores, they found it was actually warmer than previously believed.
They were there to drill hydroholes through the ice, film the ocean floor,and collect sediment cores that are millions of years old.
Lots of evidence from sediment cores and the pollen types, oxygen isotopes and so on.
To see how the chemical contents of that sediment had changed since the 2011 quake,the team dug up several long sediment cores from the bottom of the trench.
But a recent study based on sediment cores going back thousands of years, extracted from the Gulf of Aden, contradicts this view.
For over 50 years, the scientific community based its estimates on what they learned from foraminifera,which are the fossils of tiny marine organisms found in sediment cores taken from the ocean floor.
We used sediment cores and dug out all of the sediment from some ponds, to measure the organic carbon that had accumulated.
Wahl also looks for things like pollen grains andsigns of erosion in his sediment cores- clues that give away the presence of people in ancient landscapes.
Three sediment cores were extracted from the bottom of the Indian and Pacific oceans and analyzed with the aim of comparing 10Be concentrations with those of 9Be, which originates in the Earth's crust.
In 1976,a study published in the journal Science examined deep-sea sediment cores and found that Milankovitch's theory did in fact correspond to periods of climate change.
The discovery also will allow researchers to study the planet's past withfiner resolution by using this geomagnetic"fingerprint" to compare sediment cores taken from the Atlantic and Pacific oceans.
Richard Vachula and colleagues analyzed sediment cores taken from Lake E5 in the Brooks Range on the North Slope of Alaska.
Well, scientists can estimate the temperature changes at this time by looking at chemicals found in ice cores andmarine sediment cores and studying pollen buried in layers deep underground.
In one study, Maezumi's team took sediment cores dating back 8,500 years from Lake Caranã in the Brazilian state of Pará, near where the Tapajós River meets the Amazon.
In 1989 and 1990, an international team of geologists led by Dr. Stephan Kempe from the University of Hamburg(now Professor at the Technische Universität Darmstadt)retrieved ten sediment cores from depths up to 446 m(1,463 ft).
To reach their findings, the team examined ocean sediment cores and found that over the past 100,000 years, at least 8“pulses” of iron have penetrated the eastern equatorial Pacific.
Several geochemical proxy tools include long-chain organic molecules(e.g. alkenones), stable and radioactive isotopes, and trace metals.[1]Additionally, sediment cores can also be useful; the field of paleoceanography is closely related to sedimentology and paleontology.
They compared those records with sediment cores from other sites in the Pacific Ocean to capture a magnetic fingerprint, which is based on the orientation of the magnetite in the sediment, which acts as a magnetic recorder of the past.
Now, after analysing marine sediment cores from 83 sites around the world, the researchers have reconstructed global sea surface temperatures during the LIG, and matched it with temperature data sets covering the years 1870- 1889 and 1995- 2014.
According to the researchers, who analysed sediment cores extracted from the floor of the Arabian Sea- the site of what is thought to be the largest dead zone in the world- anaerobic bacteria that dwell in deep waters could be responsible for producing almost one-fifth of the organic matter that exists on the seabed.
Sea-surface temperature(SST) records can be extracted from deep-sea sediment cores using oxygen isotope ratios and the ratio of magnesium to calcium(Mg/Ca) in shell secretions from plankton, from long-chain organic molecules such as alkenone, from tropical corals near the sea surface, and from mollusk shells.[2].
Their findings, based on ocean sediment core samples between 2.5 million to 3.3 million years old, provide scientists with a deeper understanding of the mechanisms of climate change today.
David Wahl, a U.S. Geological Survey expert in studying ancient climates,turned up the ash layer in a sediment core he drilled in Laguna Ek'Naab, located about a mile away from the city.
The University of Arkansas has produced a 1238-year tree-ring based chronology of weather condition in central Mexico by examining core samples taken from living Montezuma Cypress trees.[citationneeded] Sediment core samples taken at the volcanic caldera in Valles Caldera, New Mexico and other locations.
The new sediment core findings, Alley noted, suggest that these climate models are accurate.
In mapping the pollution history in a sediment core from the Baltic coast of Germany, researchers could clearly observe that within 10 to 15 years of phasing out lead in petrol by 1996, lead pollution levels in the sea had decreased….
This researcher and colleagues at the University of Washington, the South African National Museum and the California Institute of Technology, in particular,looked 127 fossilized skulls of reptiles and amphibians found in a sediment core from 300 m thick taken from sedimentary deposits of the Karoo basin in South Africa.
The only way to prove this was by analyzing sediment and rock cores.
Our new study used an extensive network of tree rings,ice cores, corals, and sediment records from across Australia and the adjacent Indian and Pacific Oceans to extend rainfall records across all of the major regions of Australia by between 400 and 800 years.