Conveners
Applications in Atmospheric and Environmental C-14
- Jocelyn Turnbull (GNS Science)
Applications in Atmospheric and Environmental C-14
- Sheng Xu (Tianjin University)
Applications in Atmospheric and Environmental C-14
- Zhenchuan Niu (Institute of Earth Environment, Chinese Academy of Sciences)
Description
Applications involving modern C-14 in tracing environmental processes including greenhouse gases, soil processes, biodegradation, and groundwater.
The Tibetan Plateau plays an important role in the global carbon cycle. Despite its significance, the mechanisms, sources and fluxes of CO2 emissions from this region remain poorly understood. This study employs radiocarbon to trace the origins of CO2 released in the southern Tibetan Plateau. Combining 14C and other geochemical proxies (chemical compositions, 3He/4He, δ13C, etc.) from soil...
Advanced 14C dating on organic carbon with distinct bond strengths for terrestrial carbon cycling dynamics
Hong Wang1, Xiaofei Gao1, Peng Cheng2, Yi Yang1, Jia Cao1, Dongxue Li3, Peixian Shu2, Guodong Ming4, Yingna Liu1, Keli Zhang1, Baoshan Cui3, Yongming Han2, Xuefeng Lu2, Hua Du2, Feng Xian2, Sanyuan Zhu5, Yanmin Sun5, Tianhe Liu1, Lin liu1, Xiaolei Zhao1, Weijian Zhou2, Zhisheng An2...
The need for alternative sources of fuel has motivated the search for production routes based on renewable materials that may equal the fossil options in efficiency and which are economically viable. For the fuel industry to adapt to this reality, it is necessary to size up the investment in new production plants and in the development of new technologies. Regulatory bodies are supposed to...
Volcanic activities are known to release a substantial amount of deep carbon to the Earth’s surface, thereby influencing the global carbon cycle on geological timescales. Volcanic activities release CO₂ to the atmosphere not only from the crater, but also from the flank and base of the volcanoes in the form of soil emissions, hot springs, vents, and deep carbon in dissolved state. Carbon...
As a large carbon emitter, how much of the increased atmospheric CO2 derived from fossil fuel emissions is not only an important scientific question, but also important to assess the current policies of carbon peak and carbon neutrality in China. Because of the complete depletion in fossil fuels, radiocarbon (14C) is regarded as an independent and objective tool to evaluate fossil fuel CO2...
The 20 AMS 14C dates on a 96-cm long core (22-Al-02A) from Kolyvanskoe Lake in the Altai Krai, exhibit nuclear bomb 14C influence in the upper 13 cm part. However, the bomb 14C curve may have changed its shape owing to old carbon influence (OCI). An age-depth model (with selected 14C ages having less OCI) has been established for the past 3000 years by using the Bayesian statistical Bacon...
Analysis of 14C radioactivity in seawater of Beibu Gulf, Guangxi, China, using GXNU-AMS
After the Fukushima nuclear accident in Japan, the safety management of nuclear power has been emphasized by various countries, while the radioactivity levels in the environment surrounding nuclear power plants have also received public attention. Studies have shown that the persistence of nuclear...
Since few years the Centre of Applied Physics Dating and Diagnostics (CEDAD) at the University of Salento is collaborating with the Committee on Missing Persons in Cyprus (CMP) for the analysis of the human skeleton remains of around two thousand persons who went missing during the inter-communal fighting of 1963-64 and the events of 1974.
The aim of the CMP, supported by the United Nations,...
Urban areas are responsible for the vast majority of fossil fuel carbon dioxide emissions, thus mitigation actions are often taken at the city level. Detailed information about urban emissions and offsetting potential is needed to guide mitigation actions and to evaluate the efficacy of these actions. CarbonWatch-Urban is a multi-tiered approach to provide fine-scale carbon dioxide emissions...
Investigating the dissolved inorganic carbon (DIC) processes and associated chemical and isotopic (13C and 14C) evolutions is critical for deciphering its implications on climate change and groundwater quality. Growing number of 13C and 14C measurements of DIC in recent years,however, it is still unclear about the DIC evolution. In this study, we synthesize and deduce the isotopic...
81Kr is a cosmogenic isotope with a half-life of 229 ka. Due to its chemical inertness, it has a uniform distribution in the atmosphere and a simple transport behavior in the environment, avoiding some complexities in 14C dating. Therefore, 81Kr is an ideal tracer in the earth sciences.
Limited by the precision of 81Kr analysis, there is a dating gap between 14C and 81Kr. Recently, we have...
