Determining terrestrial paleotemperatures using the oxygen isotopic composition of pedogenic carbonate

Dworkin, Steven I.; Nordt, Lee C.; Atchley, Stacy C.

doi:10.1016/j.epsl.2005.06.054

Cited by 130 publications

(79 citation statements)

References 39 publications

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“…C3-dominated ecosystem throughout the Pleistocene. Furthermore, δ 18 O c is well correlated with the isotopic composition of meteoric water and could be used to reconstruct paleotemperature worldwide (Dworkin et al, 2005). Our δ 18 O c results of the last 0.8 Myr are similar to those from 2.6-0.9 Myr (Table 1 and Table S1), suggesting that changes in the formation temperature of carbonate nodules were minor.…”

Section: Examining the Fidelity Of S(z) Estimatessupporting

confidence: 86%

An Early Pleistocene atmospheric CO2 record based on pedogenic carbonate from the Chinese loess deposits

Zhang

Wang

et al. 2015

Earth and Planetary Science Letters

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Section: Examining the Fidelity Of S(z) Estimatessupporting

confidence: 86%

An Early Pleistocene atmospheric CO2 record based on pedogenic carbonate from the Chinese loess deposits

Zhang

Wang

et al. 2015

Earth and Planetary Science Letters

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“…Beyond stable carbon isotope composition, also the 18 O/ 16 O ratio in pedogenic carbonate can provide paleoclimatic information (e.g. Cerling 1984;Dworkin et al 2005). Royer et al (2001), however, pointed out that the temporal resolution of stable isotope analysis based on pedogenic CaCO 3 is limited by the time scale of secondary carbonate formation.…”

Section: Introductionmentioning

confidence: 98%

Carbonate recrystallization in root-free soil and rhizosphere of Triticum aestivum and Lolium perenne estimated by 14C labeling

2010

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Under arid and semiarid conditions, pedogenic (secondary) carbonates are formed in soil by precipitation of Ca 2? from soil parent material with dissolved CO 2 originating from root and rhizomicrobial respiration. d 13 C values of secondary CaCO 3 record the photosynthetic pathway of former vegetation and is therefore used as a tool for paleoenvironmental studies. The time scale of pedogenic carbonate formation as well as the influence of several environmental factors are crucial, yet poorly known. We estimated the recrystallization rate of pedogenic carbonate by the 14 C isotopic exchange method. 14 CO 2 was assimilated by plants, respired into the rhizosphere and subsequently incorporated into secondary carbonate by recrystallization of primary loess carbonate. With ascending number of 14 CO 2 pulses, the amount of rhizosphere 14 C recovered in loess CaCO 3 increased linearly, leading to recrystallization rates of 3.2 9 10 -5 and 2.8 9 10 -5 day -1 for wheat and ryegrass, respectively. In loess close to roots, recrystallization rates more than twice as high were obtained. Extrapolating these rates we showed that several hundred years are necessary for complete recrystallization of primary loess CaCO 3 in root-free substrate, assuming that both primary and secondary carbonate is recrystallized several times. In contrast, the process probably takes only decades in rhizosphere loess if carbonaceous encrustations form around the root, impeding repeated recrystallization. This indicates the importance of rhizosphere processes (e.g. respiration of roots and microorganisms, exudation) for secondary carbonate formation.

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“…As a re sult of this, cal cu la tion of tem per atures in high-res o lu tion cli mate re con struc tions based on Quater nary speleothems has been aban doned or demands ad di tional data (see Fairchild and Baker, 2012). How ever, such es ti ma tions have been com monly made in a study of other fresh wa ter car bon ates, namely palaeosols (e.g., Dworkin et al, 2005 and ref er ences therein), and also palaeokarst de pos its (e.g., Elliassen and Tal bot, 2005). The Hays and Grossmann's (1991) equation is rou tinely used.…”

Section: Discussion Origin Of Deposits Foundmentioning

confidence: 99%

New data on pre-Eocene karst in the Tatra Mountains, Central Carpathians, Poland

Jach

Gradziński

Hercman

2016

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1 Jagiellonian Uni ver sity, In sti tute of Geo log i cal Sci ences, Oleandry 2a, 30-063 Kraków, Po land 2 Pol ish Acad emy of Sci ences, In sti tute of Geo log i cal Sci ences, Twarda 51/55, 00-818 Warszawa, Po land Jach, R., Gradziński, M., Hercman, H., 2016. New data on pre-Eocene karst in the Tatra Moun tains, Cen tral Carpathians, Po land. Geo log i cal Quar terly, 60 (2): 291-300, doi: 10.7306/gq.1281Sparry lime stone, ferruginous muddy lime stone and lime stone brec cia have been found in the West ern Tatra Mts. They occur within Ju ras sic rocks of the Choč Nappe just be low red con glom er ates of prob a ble Eocene age. The de pos its found bear strong re sem blance to the infill of sub ter ra nean karst forms. They dif fer sig nif i cantly from Qua ter nary karst de pos its of the Tatra Mts. The d 18 O val ues of spelean car bon ates sug gest crystallisation at rel a tively high tem per a tures (over 20°C) whereas their rel a tively neg a tive d 13 C val ues im ply the pres ence of soil-de rived CO 2 linked with veg e ta tion dom i nated by C3 path way plants. The karst forms and their infill were formed be fore the Eocene trans gres sion, which shows un equiv o cally that the Tatra Mts. were sub jected to karstification at that time.

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Determining terrestrial paleotemperatures using the oxygen isotopic composition of pedogenic carbonate

Cited by 130 publications

References 39 publications

An Early Pleistocene atmospheric CO2 record based on pedogenic carbonate from the Chinese loess deposits

An Early Pleistocene atmospheric CO2 record based on pedogenic carbonate from the Chinese loess deposits

Carbonate recrystallization in root-free soil and rhizosphere of Triticum aestivum and Lolium perenne estimated by 14C labeling

New data on pre-Eocene karst in the Tatra Mountains, Central Carpathians, Poland

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