Sentences with phrase «by isotope data»

This data was determined by a combination of direct observation and counting of inventories, and cross checked by isotope data.

Not exact matches

By measuring isotope ratios in B. kiplingi «s tissue and plugging this data into a dietary model, Christopher Meehan of the University of Arizona in Tucson determined that protein - rich nodules called Beltian bodies, found on the leaves of some plants, make up 90 per cent of its diet (Current Biology, DOI: 10.1016 / j.cub.2009.08.043).

By looking at the chemistry of rocks deposited during that time period, specifically coupled carbon and sulfur isotope data, a research team led by University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this evenBy looking at the chemistry of rocks deposited during that time period, specifically coupled carbon and sulfur isotope data, a research team led by University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this evenby University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this event.

That document and other statements by the Agency indicated that the DNA and isotope data would indeed be used, along with other evidence, to make asylum decisions.

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.

Analysis of the stable isotope control data was funded in part by a grant from the Fishmongers» Company, one of London's medieval Livery Companies, which retains responsibility for quality control at London's Billingsgate fish market.

The scientists behind the research, from Europe and North America, didn't get their data from a magical ancient pH - sensing prototype, but by analyzing isotopes from algae that grew amongst sampled coral.

Sunspot observations (going back to the 17th century), as well as data from isotopes generated by cosmic radiation, provide evidence for longer - term changes in solar activity.

Individual model parameterizations were constrained by paleontological data, and the overall modeled relationship between global temperature and sea level matched well against records from four previous warm periods: preindustrial, the last interglacial, marine isotope stage 11, and the mid-Pliocene.

Different records of solar activity (Wolf and group sunspot number, data on cosmogenic isotopes, historic data) were analyzed by means of modern statistical methods, including one especially developed for this purpose.

We studied a high - resolution multiproxy data set, including magnetic susceptibility (MS), CaCO3 content, and stable isotopes (δ18O and δ13C), from the stratigraphic interval covering the uppermost Maastrichtian and the lower Danian, represented by the pelagic limestones of the Scaglia Rossa Formation continuously exposed in the classic sections of the Bottaccione Gorge and the Contessa Highway near Gubbio, Italy.

This is a similar value to the ~ 5 years found from 13C / 12C carbon isotope mass balance calculations of measured atmospheric CO2 13C / 12C carbon isotope data by Segalstad (1992); the ~ 5 years obtained from CO2 solubility data by Murray (1992); and the ~ 5 years derived from CO2 chemical kinetic data by Stumm & Morgan (1970).

An examination of the data from: i) measurements of the fractionation of CO2 by way of Carbon - 12 and Carbon - 13 isotopes; ii) the seasonal variations of the concentration of CO2 in the Northern Hemisphere; and iii) the time delay between Northern and Southern Hemisphere variations in CO2, raises questions about the conventional explanation of the source of increased atmospheric CO2.

Tree Ring Data for Climate Reconstruction and Indication of Shifting Climate Regimes by Valerie Barber, Institute of Marine Science: «The three different parameters of the annual tree rings (width, density, and ð13C isotope concentration) measured in this study produce distinctly different climatic information.

Isotope Data Suggests Fossil Fuels Not to Blame for Increase Methane bubbles up from swamps and rivers, belches from volcanoes, rises from wildfires, and seeps from the guts of cows and termites (where is it made by microbes).

The researchers were able to discern agricultural methane from other sources of methane by looking at the gas» isotopic signatures — or the ratio of various carbon isotopes — using data from atmospheric monitoring stations around the world.

The main panel 1 data is from stable oxygen isotope measurements from the shells of macroscopic marine organisms («fossil shells»), collected by Veizer et al (1999), as re-interpreted by Royer et al (2004).