Measurement of Radiocarbon Content in Leaves from Some Japanese Sites

We have measured radiocarbon contents in leaves collected from 15 sites in Japan, including mountain areas and big city areas for last three years. Comparing the radiocarbon contents in various areas, high 14 C concentrations (80–100‰ as δ 14 C) are seen for the leaves from the mountain and country sites. On the contrary, low concentrations (5–40‰) were observed for the leaves from city region, especially near the road with heavy traffic. These results indicate that the atmosphere of the mountain and country sites in Japan is still clean but the CO 2 gas coming from fossil non-radioactive carbon significantly pollutes the atmosphere of the city sites. The value of δ 14 C for the mountain areas implies that 14 C produced by nuclear bomb test in 1960s still remains. The decrease of δ 14 C at heavy traffic sites in Tokyo is consistent with the increase of CO 2 concentration in the atmosphere assuming that almost all CO 2 gas in this region originates from the fossil fuel

Archaeology · Geography · Meteorology · Physical geography · Radiocarbon dating · Atmospheric and Environmental Gas Dynamics · Chemistry · Environmental Science · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Environmental Chemistry · Geology

• Postglacial vegetation and climate history and traces of early human impact and agriculture in the present-day cool mixed forest zone of European Russia

  Open Access•Pavel E Tarasov, Larissa A Savelieva et al.•Quaternary International•2019

  Añadir item

• Lateglacial and Holocene changes in vegetation and human subsistence around Lake Zhizhitskoye, East European midlatitudes, derived from radiocarbon-dated pollen and archaeological records

  Open Access•Pavel E Tarasov, Larissa A Savelieva et al.•Quaternary International•2022

  Añadir item

• Seasonal Variations of Radiocarbon Content in Plant Leaves in a 14 C-Depleted Area

  Open Access•Rana Baydoun, Omar El Samad et al.•Radiocarbon•2015

  Añadir item

• Measurement of 14 C Content in Leaves near a Cement Factory in Mount Lebanon

  Open Access•Rana Baydoun, Omar El Samad et al.•Radiocarbon•2015

  Añadir item

• Radiocarbon Concentration in Annual Tree Rings from the Salamanca Region, Western Spain

  Andrzej Rakowski, Andrzej Z Rakowski et al.•Radiocarbon•2013

  Añadir item

• Twenty Years of Atmospheric 14 Co 2 Observations At Schauinsland Station, Germany

  Open Access•Ingeborg Levin, Bernd Kromer•Radiocarbon•1997

  Añadir item

• Comparing Long-Term Atmospheric 14 C and 3 H Records Near Groningen, the Netherlands with Fruholmen, Norway and Izaña, Canary Islands 14 C Stations

  Open Access•Harro A J Meijer, Johannes Van Der Plicht et al.•Radiocarbon•1995

  Añadir item

• Problems and Methods of Dating Low-Activity Samples by Liquid Scintillation Counting

  Open Access•Kh A Arslanov, T V Tertychnaya et al.•Radiocarbon•1993

  Añadir item

• The IAEA 14 C Intercomparison Exercise 1990

  Open Access•Kazimierz Rozanski, Willibald Stichler et al.•Radiocarbon•1992

  Añadir item

• The New Nagoya Radiocarbon Laboratory

  Open Access•Yasushi Muraki, Grant Kocharov et al.•Radiocarbon•1997

  Añadir item

• Changes of the CO 2 Sources and Sinks in a Polluted Urban Area (Southern Poland) Over the Last Decade, Derived from the Carbon Isotope Composition

  Open Access•Tadeusz Kuc, Miroslaw Zimnoch•Radiocarbon•1997

  Añadir item

• Two Decades of Environmental Isotope Records in Croatia

  Open Access•Ines Krajcar-Bronić, Nada Horvatinčić et al.•Radiocarbon•1997

  Añadir item

• A Survey of Environmental 14 C Levels in Hong Kong

  Open Access•P L LEUNG, M J STOKES et al.•Radiocarbon•1995

  Añadir item

• Discussion Reporting of 14 C Data

  Open Access•Minze Stuiver, Henry A Polach•Radiocarbon•1977

  Añadir item