Sentences with phrase «from isotopic data»

Evidence from isotopic data on Early Holocene bison and other large herbivores in northern Europe.

Not exact matches

Nonetheless, the findings are valuable because isotopic nitrous oxide data from the Arctic and sub-Arctic are extremely rare.

The UniChem connectivity search function allows users to find not only exact matches of their chemical structure across 60 million related molecules from 21 data sources worldwide, but also identifies «equivalent» structures that have the same atom connectivity while differing in stereochemistry or isotopic composition, or which exist in a different salt form.

Conservative tracer studies using stable oxygen isotopic data from 307 sites show that while the entire surface of this area receives abundant freshwater from meteoric sources, freshwater from sea ice melt is most closely linked to the areas of carbonate mineral undersaturation.

In the subtropical Himalayas, there is evidence from ice - core isotopic data and from nearby stations for unusual 20th century warming [Thompson et al, 2003].

The isotopic data evaluated above is derived from the fractionation of the naturally occuring stable isotopes of Carbon, 12 and 13.

From what I can tell you really can not use isotopic data to determine this accurately at all.

Despite much (valid) concern about amplifying climate - methane feedbacks and leaks from «fracking» activity, the isotopic data suggest that the increase of CH4 emissions is more a result of agricultural emissions.

Since the system is linear (we are assuming — I'm open to empirical data showing it is not, but I currently don't know of any), the above decay time will be measured for each isotopic species individually and independently from the others.

Although a previous estimate based on this approach yielded a MAT of approximately — 5 °C, additional information from oxygen isotopes in mosses at the site allowed us to calculate isotopic enrichment in the cellulose of fossil trees, thereby reducing assumptions and increasing the precision of our MAT estimates (see the Data Repository).

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.