Browsing by Subject "radiocarbon"
Now showing items 1-16 of 16
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Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14C Measurements From the Northern Permafrost Region
Estop‐Aragonés, Cristian;
; ; ; ; ; Egan, Jocelyn E.; ; Garnett, Mark H.; Hartley, Iain P.; ; ; Natali, Susan M.; O'Donnell, Jonathan A.; ; Tanentzap, Andrew J.; ; ; Turetsky, Merritt; Anthony, Katey Walter (Global Biogeochemical Cycles, 2020-09-14)
The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen ... -
Burial and Origin of Permafrost-Derived Carbon in the Nearshore Zone of the Southern Canadian Beaufort Sea
; Meyer, V.; Riedel, T.; ; Mathieu, L.; ; ; ; ; (Geophysical Research Letters, 2020)
Detailed organic geochemical and carbon isotopic (δ13C and Δ14C) analyses are performed on permafrost deposits affected by coastal erosion (Herschel Island, Canadian Beaufort Sea) and adjacent marine sediments (Herschel ... -
Cave paleozoology in the Judean Desert: assembling records of Holocene wild mammal communities
; ; ; ; ; ; (Journal of Quaternary Science, 2021-12-24)
Long temporal records of Holocene wild mammal communities are essential to examine the role of human impacts and climatic fluctuations in the configuration of modern ecosystems. We show that such records can be assembled ... -
Geomorphologische Untersuchungen im östlichen Kroumirbergland (Nordtunesien, Gebiet östlich von Tabarka)
(E&G – Quaternary Science Journal; Vol.27, No. 1)Im nordtunesischen Untersuchungsgebiet (östliches Kroumirbergland) lassen sich verschiedene Ablagerungen voneinander trennen. Am jüngsten ist eine Feinmaterialakkumulation, die eine maximale Höhe von 5—6 m über Niedrigwasserbett ... -
Impacts of Drying and Rewetting on the Radiocarbon Signature of Respired CO2 and Implications for Incubating Archived Soils
; ; ; ; (Journal of Geophysical Research: Biogeosciences, 2021-09-14)
The radiocarbon signature of respired CO2 (∆14C‐CO2) measured in laboratory soil incubations integrates contributions from soil carbon pools with a wide range of ages, making it a powerful model constraint. Incubating ... -
Northeast Siberian Permafrost Ice‐Wedge Stable Isotopes Depict Pronounced Last Glacial Maximum Winter Cooling
; ; ; ; ; ; ; (Geophysical Research Letters, 2021-04-09)
Stable isotopes (δ18O, δD) of wedge ice hold potential to reconstruct past winter climate conditions. Here, we present records of the marine isotope stages (MIS) 3 and 2 including the last Glacial maximum (LGM) from Bol’shoy ... -
Probability Distributions of Radiocarbon in Open Linear Compartmental Systems at Steady‐State
; ; ; (Journal of Geophysical Research: Biogeosciences, 2022-03-24)
Radiocarbon (14C) is commonly used as a tracer of the carbon cycle to determine how fast carbon moves between different reservoirs such as plants, soils, rivers, or oceans. However such studies mostly emphasize the mean ... -
Radiocarbon dates for upper Eem and Würminterstadial samples
(E&G – Quaternary Science Journal; Vol.09, No. 1)Es wird eine Übersicht gegeben von C14-Daten von Eem-interglazialen und Würm-interstadialen Proben von Loopstedt (Schleswig-Holstein), Amersfoort (Niederlande), Lebenstedt, Roggendorf, Karrestobel, Geesthacht, Upton Warren ... -
Radiocarbon Evidence for the Contribution of the Southern Indian Ocean to the Evolution of Atmospheric CO2 Over the Last 32,000 Years
; ; ; ; ; (Paleoceanography and Paleoclimatology, 2020)
It is widely assumed that the ventilation of the Southern Ocean played a crucial role in driving glacial-interglacial atmospheric CO2 levels. So far, however, ventilation records from the Indian sector of the Southern Ocean ... -
Radiocarbon Measurements and the Holocene and Late Würm Sealevel Rise
(E&G – Quaternary Science Journal; Vol.23-24, No. 1) -
Radiocarbon measurements of Würm-interstadial samples from Jutland
(E&G – Quaternary Science Journal; Vol.09, No. 1)Der Inhalt von radioaktivem Kohlenstoff in würminterstadialen Proben aus Brörup, Jütland, ist in den Datierungslaboratorien in Kopenhagen und Groningen gemessen worden. Die Proben waren durch verhältnismäßig große Mengen ... -
The new 14C chronology for the Palaeolithic site of La Ferrassie, France: the disappearance of Neanderthals and the arrival of Homo sapiens in France
; Aldeias, V.; Goldberg, P.; Chiotti, L.; Dibble, H. L.; Guérin, G.; Hublin, J.‐J.; Madelaine, S.; Maria, R.; Sandgathe, D.; Steele, T. E.; Turq, A.; Mcpherron, S. J. P. (Journal of Quaternary Science, 2020-08-24)
The grand abri at La Ferrassie (France) has been a key site for Palaeolithic research since the early part of the 20th century. It became the eponymous site for one variant of Middle Palaeolithic stone tools, and its ... -
Toward Reconciling Radiocarbon Production Rates With Carbon Cycle Changes of the Last 55,000 Years
; ; ; (Paleoceanography and Paleoclimatology, 2022-02-16)
Since it is currently not understood how changes in 14C production rate (Q), and in the carbon cycle, can be combined to explain the reconstructed atmospheric Δ14C record, we discuss possible reasons for this knowledge ... -
Weichselzeitliche Torfe aus den Ems—Terrassen bei Münster (Westf.)
(E&G – Quaternary Science Journal; Vol.28, No. 1)Bei Münster wurde in rund 7 m Tiefe unter Flur der Oberen Niederterrasse der Ems eine warvenähnliche Wechsellagerung von Drepanocladus aduncus-Torfen und Schluffen gefunden. Die Ablagerungen wurden von Eiskeilen durchzogen. ... -
Zur Chronologie des Kelsterbach—Hominiden, des ältesten Vertreters des Homo sapiens sapiens in Europa
(E&G – Quaternary Science Journal; Vol.28, No. 1)Das Cranium eines fossilen Hominiden des Formenkreises Homo sapiens sapiens wurde relativ-geologisch sowie absolut durch Radiokohlenstoff und Aminosäuren auf ungefähr 31 000 Jahre B.P. datiert. Andere absolute sowie relative ... -
Zur Entwicklung der jungquartären Tieflandstäler im Saale-Elbe-Raum unter besonderer Berücksichtigung von 14C-Daten
(E&G – Quaternary Science Journal; Vol.41, No. 1)Erstmalig wurden für den Saale-Elbe-Raum — als geologisch gut erschlossenes Untersuchungsgebiet Mitteleuropas — systematisch gesammelte Proben durch Radiokarbon datiert. Somit ist es möglich, das weichseiszeitliche Alter ...
