Isotopes temperatures

Jouzel, J., Lorius, J. R., Petit, C. et al. (1993). Vostok ice-core - a continuous isotope temperature record over the last climatic cycle (160000 years). Nature 329,403 08. 

Fig. 18-18 Top two panels show the history of Antarctic MSA fraction (Legrand et at., 1991), and coincident isotopic temperature history 0ouzel et al., 1993). Bottom two panels present a closer look at the last 25 kyr, for both Antarctica and Greenland (Saltzman et al., 1997).

Epstein, S., Buchsbaum, R, Lowenstam, H. and Urey, H.C. 1951 Carbonate-water isotopic temperature scale. Bulletin of the Geological Society of America 62 417-425. 

Revised phosphate-water isotopic temperature scale. Earth and Planetary Science Letters... 

Figure 1.178 represents a comparison between the stannite-sphalerite temperatures and homogenization temperatures of fluid inclusions or sulfur isotope temperatures. It can be seen in Fig. 1.178 that Nakamura and Shima s geothermometer would be rather consistent with the temperature estimated based on the fluid inclusions or sulfur isotope studies. It is notable that almost all stannite-sphalerite temperatures are within 30°C of average homogenization temperatures and sulfur isotope temperatures. 

Figure 1.178. Comparison between the stannite-sphalerite temperatures and filling temperatures of fluid inclusions or sulfur isotope temperatures. NT Nakatatsu, OB Obira, KN Kano, KG Kuga, TM Tsumo, KM Kamioka, OT Ohtani, KU Kaneuchi, Ak Akenobe, TT Takatori, YT Yatani (Shimizu and Shikazono, 1985).

Epstein, S., R. Buchsbaum, H. A. Lowenstam, and H. C. Urey (1953), Revised carbonate water isotopic temperature scale, Bull. Geol. Soc. Am. 64, 1315-1322. 

Giletti BJ (1986) Diffusion effects on oxygen isotope temperatures of slowly cooled igneous and metamorphic rocks. Earth Planet Sci Lett 77 218-228... 

In a more trivial sense, small isotope effects may appear temperature-independent simply because the expected isotopic difference in enthalpies or energies of activation is small. It is thus, of course, important to compare the apparent isotopic temperature dependences and their error estimates with the semiclassical expectations. 

The pH dependence of the oxygen isotope composition in the carbonate-water system has important implications in the derivation of oxygen isotope temperatures. 

Sulfur isotope temperatures from ore deposits often have been controversial one of the reasons are strong " S zonations in sulfide minerals that have been observed by laser probe and ion probe measurements (McKibben and Riciputi 1998). 

He postulated that the determination of temperatures of the ancient oceans should be possible, in principle, by measuring the 0 content of fossil shell calcite. The first paleotemperature scale was introduced by McCrea (1950). Subsequently, this scale has been refined several times. Through experiments which compare the actual growth temperatures of foraminifera with calculated isotope temperatures Erez and Luz (1983) determined the following temperature equation ... 

It is noteworthy that the zeolites have significantly higher thermal motion than the simpler silicates. The room-temperature equivalent isotopic temperature factors for Si and O in sodium zeolite A are reported as 1.85 and 3.0 A2, respectively, compared with 0.49 and 0.99 A2 in quartz. 

Diffusion effects on oxygen isotope temperatures of slowly cooled igneous... 

Isotopic disequilibrium between gases induced by re-injection has been reported by Bolognesi et al. (1990). Oxygen, H, and C isotopes of the fluid discharged by wells of a S-N oriented transect crossing the whole geothermal field reveal that after re-injection, samples show different isotopic temperatures from those obtained... 

Fig. II. Observed variations of isotopic temperatures before and after re-inject ion in selected wells (VC 10, Gl. 137. Le PR2). (a) Variations computed with the pair (FLO-Hj) in relation 10 the wellhead temperatures (7 vh)- (b) Isotopic temperatures are relative to the pair (C02-CH4). Full symbols refer to the pre-injection data.

Figure 7 also shows the influence of sea surface temperature, on 5p. Merlivat and Jouzel (1979), Johnsen et al. (1989), and Petit et al. (1991) show that source conditions (temperature and humidity) also influence the relative amounts of HDO and H2 0 in the parcel and thus the deuterium excess in precipitation. The model reproduces deuterium-excess values observed in Greenland (Johnsen et al., 1989) and in Antarctica, where d becomes higher than 15%o in central regions (Petit et al., 1991 Dahe et al, 1994). These results as well as those concerning the isotope-temperature relationship were further confirmed by Ciais and Jouzel (1994), who introduced mixed clouds into the Rayleigh-type model, thereby allowing supercooled liquid droplets and ice crystals to coexist between-15 °C... 

Jouzel J., Vimeux F., Caillon N., Delaygue G., Hoffmann G., Masson V., and Parrenin F. (2003) Magnimde of the isotope/ temperature scaling for interpretation of central Antarctic ice cores. J. Geophys. Res. 108(D12), doi 10.1029/2002 JD002677. 

Werner M., Mikolajewicz U., Heimann M., and Hoffmann G. (2000) Borehole versus isotope temperatures on Greenland seasonality does matter. Geophys. Res. Lett. 27, 723-726. 

Shackleton N. J. and Opdyke N. D. (1973) Oxygen isotope and paleomagnetic stratigraphy of equatorial Pacific core V28-238 oxygen isotope temperatures and ice volumes on a 10 and 10 year scale. Quat. Res. 3, 39-55. 

It should be possible to test the fidelity of alkenone SST reconstructions with an independent paleothermometer such as 5 0. There are a number of reasons why this comparison is not straightforward, however. First, many planktonic foraminifera live below the mixed layer for part or all of their life cycle. Comparing their isotopic temperatures with the unsaturation index of the alkenone producers, which must live in the photic zone, may not yield consistent estimates of past temperature changes. Many foraminifera have seasonal cycles of production far more pronounced... 

Several studies have in fact attempted to deduce regional changes in salinity by pairing foraminiferal 8 0 data with alkenone paleotemperature estimates. In a seminal paper, Rostek et al. (1993) subtracted the isotopic temperature effect from an Indian Ocean curve obtained from... 

Matheney R. K. and Knauth L. P. (1993) New isotopic temperature estimates for early silica diagenesis in bedded cherts. Geology 21, 519-522. 

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