http://cdiac.ess-dive.lbl.gov/trends/temp/domec/domec.html
Hieruit;
Methods
Because isotopic fractions of the heavier oxygen-18 (18O) and deuterium (2H) in snowfall are temperature-dependent and a strong spatial correlation exists between the annual mean temperature and the mean isotopic fraction of 18O or 2H in precipitation, it is possible to derive temperature records from the records of those isotopes in ice cores.
Deuterium values are expressed as δD, which is defined as:
δD = {[(2H/1H)sample - (2H/1H)V-SMOW] (2H/1H)V-SMOW} X 1000
where (2H/1H)sample is the ratio of deuterium to ordinary hydrogen in sample corresponding to a particular datum, and (2H/1H) V-SMOW is the ratio of deuterium to ordinary hydrogen in Vienna Standard Mean Ocean Water (V-SMOW).
The deuterium content distribution is well documented over East Antarctica and over a large range of temperatures (-20° to -55° C); there is a linear relationship between the average annual surface temperature and the snow deuterium content. The slope of this δD/surface temperature relationship was found by Jouzel et al. (1993, 1996) and Petit et al. (1999) to be 9°/°° per °C. Further details on the methodology are presented in Jouzel et al. (1987), Lorius et al. (1985), and Petit et al. (1999).
The record presented by Jouzel et al. (1987), based on data in a 2083-meter ice core from the Russian Vostok station in central east Antarctica, was the first such record to span a full glacial-interglacial cycle. Drilling continued at Vostok until January 1998, reaching a depth of 3623 m, and a corresponding time of ~420 kyr BP. More recently, a 740-kyr deuterium record has been extracted from an ice core taken at Dome C (EPICA Community Members, 2004). Deuterium fractions were determined in meltwater from 55-cm long sections of the ice core the surface down to the bottom of the core.
Vraag;
Geeft een verhoging van het Deuterium gehalte in oceanen een koeleffect ?
Een ietsie pietse verhoging van Deuterium in oceanen kan misschien totaal geen kwaad terwijl misschien een ietsie meer verhogen misschien, dan weer wel kwaad kan ?
Zie deze link in verband met misschien wat luguber het drinken van zwaar water.
Let op dit is zeer waarschijnlijk een lugubere handeling ?
https://youtu.be/fyK6kPi8k78
Slotvraag; Hoe dan verhogen ? Via neutronen activiteit ?
-
Puzzels