Evaluation of combined radiocarbon and carbon stable isotope data of PM2.5 carbonaceous aerosol in Debrecen, Hungary

2020 ◽  
Author(s):  
István Major ◽  
Enikő Furu ◽  
Tamás Varga ◽  
Anikó Horváth ◽  
István Futó ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Total Carbon ◽  
Carbonaceous Aerosol ◽  
Supplementary Information ◽  
Aerosol Sample ◽  
Carbon Stable Isotope ◽  
Carbonaceous Particle ◽  
Development Fund ◽  
Isotope Data ◽  
Stable Isotope Data

<p>Comprehensive atmospheric studies have demonstrated that carbonaceous aerosol is one of the main components of atmospheric particulate matter over Europe. Despite its significant role in atmospheric processes, the characteristic of carbonaceous particle sources and the contributions from modern and fossil sources in the Pannonian Basin are still less known. Using radiocarbon as a tracer, the ratio of modern (biological aerosol, wood burning etc.) and fossil (coal or oil burning, transportation) sources for an aerosol sample can unambiguously be determined but identification of exact sources is not possible. Considering other isotopic techniques, carbon stable isotope results can provide us such supplementary information that can be used in separating different large source clusters (e.g. burning of C3 type wood, coal burning or transportation). Different aerosol sources have well defined carbon stable isotope ranges, which can be used in source apportionment models. Nevertheless, these ranges often overlap each other, making the accurate source identification rather difficult. Combined radiocarbon and carbon stable isotope measurements can however help us to differentiate more precisely numerous modern or fossil sources.</p><p>In our study, the isotopic composition of carbon in the PM<sub>2.5 </sub>atmospheric aerosol collected on weekly basis in Debrecen, Hungary was investigated. In doing so, the organic and elemental carbon content, the specific <sup>14</sup>C content and the δ<sup>13</sup>C values of total carbon were measured using a Sunset OC/EC analyser, an accelerator mass spectrometer (AMS) and an EA/IRMS instrument, respectively. Based on our three-year long carbon stable isotope data of carbonaceous aerosol, relatively enriched δ<sup>13</sup>C results can be observed in each wintertime period, which are supposed by other authors to be related to the effect of coal combustion (mainly in heavily industrialised areas). Contrarily, radiocarbon measurements imply the dominance of modern sources for the same wintertime periods when the biological activity of vegetation is moderate. Consequently, according to our assumption, these values are caused by modern sources having more positive δ<sup>13</sup>C value such as biomass burning of residences. In contrast to single stable isotope or radiocarbon measurements our study sheds light on the importance of combined carbon isotopic investigations. The research was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016-00009 ‘ICER’</p>

scholarly journals Termination of Organic-Rich Accumulation of the Oceanic Anoxic Event 2 in the Deep-Water Carpathian Basins Based on Carbon Stable Isotope Data

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 420
Author(s):  
Marta Bąk ◽  
Krzysztof Bąk
Keyword(s):  
Stable Isotope ◽  
Deep Water ◽  
Black Shales ◽  
Carbon Stable Isotope ◽  
Western Tethys ◽  
Oceanic Anoxic Event ◽  
Isotope Data ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event ◽  
Stable Isotope Data

Organic-rich black shales intercalated with green radiolarian shales and bentonites, 2.2 m thick, represent an equivalent of the Bonarelli Level in the Outer Carpathian deep-water succession. Carbon stable isotope data from four sections in the Outer Carpathians show that termination of organic-rich accumulation, related to the oceanic anoxic event 2 (OAE2), occurred at the same time in this part of the Western Tethys. The excellent marker of this event is a first horizon of Fe–Mn layer (nodules), a few centimeters thick, directly covering the youngest black shale layer of the Bonarelli-equivalent Level, which is regarded as the regional chronohorizon. The youngest succession of the organic-rich shales, ca. 30 cm thick, corresponds to the latest Cenomanian interval of δ13Corg values displaying a negative trend, which represents a terminal part within the OAE2 carbon isotope excursion. A deep negative shift which ends this falling trend, close to the Cenomanian–Turonian boundary in δ13C curves from many sections around the world, is not visible in the Outer Carpathian successions. The reason for this was the long period of stratigraphic condensation, which is reflected in the ferromanganese sediments of this area.

scholarly journals Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Christopher J. Pollock ◽  
Pablo Capilla-Lasheras ◽  
Rona A. R. McGill ◽  
Barbara Helm ◽  
Davide M. Dominoni
Keyword(s):  
Stable Isotope ◽  
Breeding Success ◽  
Cyanistes Caeruleus ◽  
Isotope Data ◽  
Blue Tits ◽  
Stable Isotope Data

Contribution of recycled moisture to precipitation in the monsoon marginal zone: Estimate based on stable isotope data

2019 ◽  
Vol 569 ◽  
pp. 423-435 ◽  
Author(s):  
Guofeng Zhu ◽  
Huiwen Guo ◽  
Dahe Qin ◽  
Hanxiong Pan ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Marginal Zone ◽  
Isotope Data ◽  
Stable Isotope Data

scholarly journals Increasing the Research Value of Digitized Fossil Museum Specimens via Integrated Stable Isotope Data

2018 ◽  
Vol 2 ◽  
Author(s):  
Sean Moran ◽  
Bruce MacFadden ◽  
Michelle Barboza
Keyword(s):  
Stable Isotope ◽  
Data Sets ◽  
Museum Specimens ◽  
Ancillary Data ◽  
Deep Time ◽  
Aggregated Data ◽  
Isotope Data ◽  
The Status ◽  
The Individual ◽  
Stable Isotope Data

Over the past several decades, thousands of stable isotope analyses (δ13C, δ18O) published in the peer-reviewed literature have advanced understanding of ecology and evolution of fossil mammals in Deep Time. These analyses typically have come from sampling vouchered museum specimens. However, the individual stable isotope data are typically disconnected from the vouchered specimens, and there likewise is no central repository for this information. This paper describes the status, potential, and value of the integration of stable isotope data in museum fossil collections. A pilot study in the Vertebrate Paleontology collection at the Florida Museum of Natural History has repatriated within Specify more than 1,000 legacy stable isotope data (mined from the literature) with the vouchered specimens by using ancillary non Darwin Core (DwC) data fields. As this database grows, we hope to both: validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. Additionally, we envision that as the community gains a better understanding of the importance of these kinds of ancillary data to add value to vouchered museum specimens, then workflows, data fields, and protocols can be standardized.

Using stable isotope data to advance marine food web modelling

2019 ◽  
Vol 29 (2) ◽  
pp. 277-296 ◽  
Author(s):  
Stacey A. McCormack ◽  
Rowan Trebilco ◽  
Jessica Melbourne-Thomas ◽  
Julia L. Blanchard ◽  
Elizabeth A. Fulton ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Marine Food Web ◽  
Isotope Data ◽  
Marine Food ◽  
Stable Isotope Data
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