scholarly journals Palaeotemperature estimation in the Holsteinian Interglacial (MIS 11) based on oxygen isotopes of aquatic gastropods from eastern Poland

2017 ◽  
Vol 67 (4) ◽  
pp. 585-605 ◽  
Author(s):  
Marcin Szymanek
Keyword(s):  
Oxygen Isotope ◽  
Quantitative Estimation ◽  
Isotope Composition ◽  
Growth Season ◽  
Average Growth ◽  
Air Temperatures ◽  
The Mean ◽  
Evaporative Enrichment ◽  
Climatic Optimum ◽  
Lake Waters

AbstractFor quantitative estimation of past water temperature of four Holsteinian (MIS 11) palaeolakes from eastern Poland, the oxygen isotope palaeothermometer was applied to shells of the aquatic gastropodsViviparus diluvianusandValvata piscinalis. The δ18O composition of their shells demonstrated the average growth-season water temperatures during the mesocratic stage of the interglacial (Ortel Królewski Lake), during its climatic optimum – theCarpinus–AbiesZone (Ossówka-Hrud, Roskosz and Szymanowo Lakes), and in the post-optimum (Szymanowo Lake). The calculation was based on δ18OShellvalues and the δ18OWaterassumed for the Holsteinian from the modern oxygen isotope composition of precipitation and the expected amount of evaporative enrichment. The mean oxygen isotope palaeotemperatures of Ortel Królewski lake waters were in the range of 18.1–21.9°C and were uniform for theTaxusandPinus–Larixzones. Ossówka-Hrud and Roskosz Lakes had mean temperatures of 17.4–21.0°C during the climatic optimum, whereas the temperature of Szymanowo lake waters was estimated at 20.6–21.7°C at that time. These values are concordant with the pollen-inferred July air temperatures noted during the Holsteinian in eastern Poland. Relatively high values of ~25°C in the post-optimum noted at Szymanowo were connected with the presence of a shallow and warm isolated bay indicated by pollen and mollusc records.

On the mean oxygen isotope composition of the Solar System

Icarus ◽  
2007 ◽  
Vol 186 (2) ◽  
pp. 562-570 ◽  
Author(s):  
M. Ozima ◽  
F.A. Podosek ◽  
T. Higuchi ◽  
Q.-Z. Yin ◽  
A. Yamada
Keyword(s):  
Solar System ◽  
Oxygen Isotope ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
The Mean

Fruit carbonate in Lithospermeae: 14C, stable isotope composition and potential as a paleoenvrionmental proxy

2021 ◽  
Author(s):  
Konstantin Pustovoytov ◽  
Simone Riehl
Keyword(s):  
Oxygen Isotope ◽  
Isotope Composition ◽  
Atmospheric Precipitation ◽  
Warm Season ◽  
Archaeological Sites ◽  
Good Correspondence ◽  
Oxygen Isotope Fractionation ◽  
Air Temperatures ◽  
Cultural Layers ◽  
Diverse Origin

<p>The tribe Lithospermeae (fam. Boraginaceae) represents one of very few taxa vascular plants that accumulate appreciable amounts of calcium carbonate in their tissues. The CaCO<sub>3</sub> is localized in the pericarp sclerenchyma, which makes their small fruits (nutlets) mechanically durable and provides their good preservation in sediments and cultural layers. Fossil Lithospermeae fruits appear as whitish, slightly elongated entities, 3-5 mm in length.  At archaeological sites, the nutlets can be of diverse origin: in most contexts they represent carpological evidence for weed flora of the past, however, some findings suggest that they were used for decorative purposes (beads etc.).  </p><p>Here we overview the potential use of fruit carbonate of Lithospermeae in paleoecological research.   </p><p><sup>14</sup>C-dating: Fruit carbonate of the taxon can be successfully dated with radiocarbon.  </p><p>The <sup>14</sup>C concentration in the CaCO<sub>3</sub> fraction of modern nutlets is well-correlated to the recent atmospheric <sup>14</sup>C levels. Radiocarbon ages of old nutlets are in good correspondence with the age ranges of archaeological contexts. Obviously, fruit carbonate can represent a geochemically closed system for millennia in sediment environments.               </p><p>δ<sup>18</sup>O values: Our data based on an array of herbarium exemplars of Lithospermeae, suggest that the δ<sup>18</sup>O of fruit carbonate is distinctively sensitive to the amount of atmospheric precipitation during the warm season. The degree of correlation between δ<sup>18</sup>O and local air temperatures is lower.</p><p>We further performed an experiment on gromwell (Buglossoides arvensis (L.) I.M.Johnst), irrigated by water with different oxygen isotope signatures. The δ<sup>18</sup>O values of fruit CaCO<sub>3 </sub>showed correlation to the δ<sup>18</sup>O of irrigation water. The oxygen isotope fractionation in fruit carbonate turned out to be surprisingly low with 1000lnα = 4.72±3.49, which is relatively close to foraminiferal CaCO<sub>3</sub>.</p><p> δ<sup>13</sup>C values: In contrast to the oxygen isotope signature, we did not find a strong correlation of the δ<sup>13</sup>C values of fruit carbonate to precipitation and temperature.  However, the photosynthetic origin of carbon in fruit CaCO<sub>3</sub> admits a possibility of some links of δ<sup>13</sup>C to ambient factors.  </p><p>   </p>

scholarly journals Isotope Composition of Precipitation, Groundwater, and Surface and Lake Waters from the Plitvice Lakes, Croatia

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2414
Author(s):  
Ines Krajcar Bronić ◽  
Jadranka Barešić ◽  
Andreja Sironić ◽  
Ivanka Lovrenčić Mikelić ◽  
Damir Borković ◽  
...  
Keyword(s):  
Air Temperature ◽  
Lake Water ◽  
Isotope Composition ◽  
Precipitation Amount ◽  
Ordinary Least Squares ◽  
Water Line ◽  
Significant Difference ◽  
The Mean ◽  
Lake Waters ◽  
Plitvice Lakes

The application of tritium, 2H, and 18O in the characterization of the precipitation, groundwater, and surface and lake water of the Plitvice Lakes (PL), Croatia, over the 1979–2019 period is presented. An increase in the mean annual air temperature of 0.06 °C/year and in the annual precipitation amount of 10 mm/year is observed. The good correlation of the tritium activity concentration in the PL and Zagreb precipitation implies that the tritium data for Zagreb are applicable for the study of the PL area. The best local meteoric water line at PL was obtained by the reduced major axis regression (RMA) and precipitation-weighted ordinary least squares regression (PWLSR) approaches: δ2HPWLSR = (7.97 ± 0.12) δ18O + (13.8 ± 1.3). The higher deuterium excess at PL (14.0 ± 2.2 ‰) than that at Zagreb reflects the higher altitude and influence of the Mediterranean precipitation. The δ2H in precipitation ranges from −132.4‰ to −22.3‰ and δ18O from −18.3 ‰ to −4.1‰. The much narrower ranges in the groundwater (<1‰ in δ18O, <10‰ in δ2H) indicate the good mixing of waters in aquifers and short mean residence times. The higher average δ2H in all three karst springs observed after 2003 can be attributed to the increase in the mean air temperature. The mean δ2H and δ18O values in the surface and lake water increase downstream due to the evaporation of surface waters. There is no significant difference between the surface water line and the lake water line (2011–2014). The stable isotope composition of the surface and lake waters reacts to extreme hydrological conditions.

Oxygen isotope composition of Holocene dolomite formed in a humid hypersaline setting: Comment and Reply

Geology ◽  
1993 ◽  
Vol 21 (3) ◽  
pp. 281 ◽  
Author(s):  
Gerald M. Friedman ◽  
R. P. Major ◽  
R. Michael Lloyd ◽  
F. Jerry Lucia
Keyword(s):  
Oxygen Isotope ◽  
Isotope Composition ◽  
Oxygen Isotope Composition

Stable Hydrogen and Oxygen Isotope Composition of Waters from Mine Tailings in Different Climatic Environments

2007 ◽  
Vol 41 (6) ◽  
pp. 1870-1876 ◽  
Author(s):  
Jorge E. Spangenberg ◽  
Bernhard Dold ◽  
Marie-Louise Vogt ◽  
Hans-Rudolf Pfeifer
Keyword(s):  
Oxygen Isotope ◽  
Mine Tailings ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
Hydrogen And Oxygen Isotope

Oxygen isotope composition of kaolinite rocks as an indicator of different stages of their lithogenesis

2011 ◽  
Vol 438 (1) ◽  
pp. 697-700
Author(s):  
N. S. Bortnikov ◽  
V. M. Novikov ◽  
E. O. Dubinina ◽  
A. D. Savko ◽  
A. G. Berketa ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Composition ◽  
Oxygen Isotope Composition

scholarly journals Spatial and temporal variability in isotope composition of recent snow in the vicinity of Vostok station, Antarctica: implications for ice-core record interpretation

2002 ◽  
Vol 35 ◽  
pp. 181-186 ◽  
Author(s):  
Alexey A. Ekaykin ◽  
Vladimir Ya. Lipenkov ◽  
Narcisse I. Barkov ◽  
Jean Robert Petit ◽  
Valerie Masson-Delmotte
Keyword(s):  
Isotope Composition ◽  
Ice Core ◽  
Snow Accumulation ◽  
Spatial And Temporal Variability ◽  
Weak Correlation ◽  
Ice Core Record ◽  
Vostok Station ◽  
The Mean ◽  
Mean Annual Air Temperature ◽  
Snow Samples

AbstractContinuous, detailed isotope (δD and δ18O) profiles were obtained from eight snow pits dug in the vicinity of Vostok station, Antarctica, during the period 1984– 2000. In addition, snow samples taken along the 1km long accumulation-stake profile were measured to determine spatial variability in isotope composition of recent snow. the stacked δD time series spanning the last 55 years shows only weak correlation with the mean annual air temperature recorded at Vostok station. Significant oscillations of both snow accumulation and snow isotope composition with the periods 2.5, 5, 20 and, possibly, ~102 years observed at single points are interpreted in terms of drift of snow-accumulation waves of various scales on the surface of the ice sheet.

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