Sentences with phrase «deuterium excess»

One involves working out what is called the deuterium excess by comparing the relative amounts of deuterium and oxygen - 18 in the ice.

New insights into Southern Hemisphere temperature changes from Vostok ice cores using deuterium excess correction.

Masson - Delmotte et al. (2005) highlight an abrupt drop in GRIP deuterium excess at 4.5 ka, and suggest that this change in isotopes of precipitation over central Greenland may have recorded a shift in regional hydroclimate.

The deuterium excess, a proxy of Greenland precipitation moisture source, switches mode within 1 - 3 years over these transitions and initiates a more gradual change (50 years) of the Greenland air temperature as recorded by water stable isotopes.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

Not exact matches

Yet, even today he doesn't know how a commercial energy source could be constructed for the palladium - deuterium system, despite his many experiments that have produced significant excess heat correlated with helium production.

Excess deuterium is an indicator of the presence of extraterrestrial materials, clearly demonstrating that extraterrestrial organic amino acids exist, survive planetary accretion, and are delivered to the Earth's surface.