Diurnal variation of CO2 concentration, Δ14C and δ13C in an urban forest: estimate of the anthropogenic and biogenic CO2 contributions

Hiroshi A. Takahashi; Eiichi Konohira; Tetsuya Hiyama; Masayo Minami; Toshio Nakamura; Naohiro Yoshida

doi:10.3402/tellusb.v54i2.16651

Diurnal variation of CO2 concentration, Δ14C and δ13C in an urban forest: estimate of the anthropogenic and biogenic CO2 contributions

Tellus B: Chemical and Physical Meteorology

Volume 54 (2002): Issue 2

By: Hiroshi A. Takahashi, Eiichi Konohira, Tetsuya Hiyama, Masayo Minami, Toshio Nakamura and Naohiro Yoshida

Open Access

|Jan 2002

Abstract

Diurnal variation in the atmospheric CO₂ concentration and the carbon isotopic composition (Δ¹⁴C and δ¹³C) was measured in a forest in an urban area on 9 February 1999. The carbon isotope approach used in the present study differentiated between the quantitative contributions from anthropogenic and biogenic CO₂ sources in the urban atmosphere. The anthropogenic (fossil fuel) and biogenic (soil respiration) contributions was estimated, and they ranged from 1 to 16% and from 2 to 8% of the total atmospheric CO₂. The diurnal variation of the anthropogenic CO₂ was the major cause of the total atmospheric CO₂ variation, while the biogenic CO₂ remained relatively constant throughout the day. Estimating the contribution of soil respired CO₂ provided the mean residence time of soil respired CO₂ within the forest atmosphere.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v54i2.16651 | Journal eISSN: 1600-0889

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Language: English

Page range: 97 - 109

Submitted on: Jun 13, 2000

Accepted on: Nov 26, 2001

Published on: Jan 1, 2002

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2002 Hiroshi A. Takahashi, Eiichi Konohira, Tetsuya Hiyama, Masayo Minami, Toshio Nakamura, Naohiro Yoshida, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 54 (2002): Issue 2