Sentences with phrase «isotopic shift»

Oceanic methane releases could account for the magnitude of C - 12, while terrestrial sources seem unlikely: «To cause this type of global isotopic shift, you'd have to take all terrestrial plants and burn them into carbon dioxide,» Kessler says in the June 11 edition of Science.

If you add CO2 from the oceans to the atmosphere, including the isotopic shift at the sea - air border, the per mil δ13C of the atmosphere would go up.

Although scientists were aware of processes that could cause an isotopic shift in surface waters, Hallis says, «until we made our measurements, we didn't know whether that would be a measureable difference or not.»

«To cause this type of global isotopic shift, you'd have to take all terrestrial plants and burn them into carbon dioxide,» Kessler says, which seems unlikely.

Not exact matches

The researchers analysed quartz crystals from Toba, and found a distinct shift in the isotopic composition towards the outer rim of the crystals.

Instead of CO2 concentrations being about 15 p.p.m.v. lower, the CO2 / temperature shift can also be explained by isotopic composition overestimating temperature by about 1 °C.

This could shift the overall isotopic signature by enough to mask a rise in emissions linked to natural gas.

«ENSO and IOD bring... shift [s] in the seasonal rainfall distribution,» Ghosh said, «which can be easily captured using isotopic fingerprinting of carbonates in growth bands of Achatina fulica snails.»

Oakwood, the tragedy is not what's happening in science — things there are just as they should be: the field continues to develop new data and refined analyses, general conclusions have been reached that a very large majority support, based on well - established principles (properties of CO2, thermodynamics, effects of warmer air on evaporation...) and data (measures of CO2 levels, shifts in isotopic composition of atmospheric CO2, temperature records — instrumental and proxy,...).