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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
arts and humanities
Latest
14
C concentrations of plant leaves at high altitudes in the northern and southern hemispheres: Vertical stability of local suess effect
Radiocarbon, Volume 55, No. 2-3, Year 2013
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Description
The radiocarbon concentrations in plant leaves from different altitudes at 3 sampling locations were measured with the new compact accelerator mass spectrometer (AMS) at Yamagata University to investigate air mixing on a global scale. The sampling locations are Yamagata in the mid-latitudes of the Northern Hemisphere (NH), Kenya in the equatorial region (EQ), and Chacaltaya in the Southern Hemisphere (SH). The 14C concentrations of the plant leaves ranged from 102 to 105 pMC. The 14C concentrations at high altitudes and mountain summits showed similar values of 104.2 ± 0.28, 104.3 ± 0.36, and 104.4 ± 0.23 pMC at the Yamagata, Kenya, and Chacaltaya sites, respectively. These results indicate that air from the free troposphere is well mixed on a global scale. The local Suess effect was calculated using the 14C concentrations of leaves at the land surface and mountain summits. The fractions were estimated as 1.25 ± 0.3% and 0.87 ± 0.44% at Yamagata and Nairobi, respectively. This estimation method is more advantageous than the conventional calculation. The life cycle of the leaves sampled is 1 or 2 yr, and hence the leaves allow us to study the 14C concentrations in the ambient atmosphere during a narrow and specific time period. © 2013 by the Arizona Board of Regents on behalf of the University of Arizona.
Authors & Co-Authors
Sakurai, Hirohisa
Japan, Yamagata
Yamagata University
Tokanai, Fuyuki
Japan, Yamagata
Yamagata University
Kato, Kazuhiro
Japan, Yamagata
Yamagata University
Takahashi, Yui
Japan, Yamagata
Yamagata University
Sato, Taichi
Japan, Yamagata
Yamagata University
Kikuchi, Satoshi
Japan, Minato
Fujitsu Limited
Inui, Emiko
Japan, Yamagata
Yamagata University
Arai, Yumi
Japan, Yamagata
Yamagata University
Masuda, Kimiaki
Japan, Nagoya
Nagoya University
Miyahara, Hiroko
Japan, Tokyo
The University of Tokyo
Mundia, Charles Ndegwa
Kenya, Nairobi
Jomo Kenyatta University of Agriculture and Technology
Tavera, Wilfredo
Bolivia, La Paz
Universidad Mayor de San Andres Bolivia
Statistics
Citations: 12
Authors: 12
Affiliations: 6
Identifiers
Doi:
10.2458/azu_js_rc.55.16273
ISSN:
00338222
Research Areas
Environmental
Study Locations
Kenya