Articles | Volume 20, issue 9
https://doi.org/10.5194/acp-20-5293-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-5293-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 May 2020
Research article |
| 15 May 2020
| 15 May 2020
O2 : CO2 exchange ratio for net turbulent flux observed in an urban area of Tokyo, Japan, and its application to an evaluation of anthropogenic CO2 emissions
National Institute of Advanced Industrial Science and Technology
(AIST), Tsukuba 305-8569, Japan
Hirofumi Sugawara
Department of Earth and Ocean Sciences, National Defense Academy of
Japan, Yokosuka 239-8686, Japan
Yukio Terao
National Institute for Environmental Studies, Tsukuba 305-8506, Japan
Naoki Kaneyasu
National Institute of Advanced Industrial Science and Technology
(AIST), Tsukuba 305-8569, Japan
Nobuyuki Aoki
National Institute of Advanced Industrial Science and Technology
(AIST), Tsukuba 305-8569, Japan
Kazuhiro Tsuboi
Meteorological Research Institute, Tsukuba 305-0052, Japan
Hiroaki Kondo
National Institute of Advanced Industrial Science and Technology
(AIST), Tsukuba 305-8569, Japan
Viewed
Total article views: 2,967 (including HTML, PDF, and XML)
Cumulative views and downloads
(calculated since 05 Sep 2019)
| HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 2,026 | 861 | 80 | 2,967 | 97 | 120 |
- HTML: 2,026
- PDF: 861
- XML: 80
- Total: 2,967
- BibTeX: 97
- EndNote: 120
Total article views: 2,269 (including HTML, PDF, and XML)
Cumulative views and downloads
(calculated since 15 May 2020)
| HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 1,678 | 519 | 72 | 2,269 | 86 | 108 |
- HTML: 1,678
- PDF: 519
- XML: 72
- Total: 2,269
- BibTeX: 86
- EndNote: 108
Total article views: 698 (including HTML, PDF, and XML)
Cumulative views and downloads
(calculated since 05 Sep 2019)
| HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 348 | 342 | 8 | 698 | 11 | 12 |
- HTML: 348
- PDF: 342
- XML: 8
- Total: 698
- BibTeX: 11
- EndNote: 12
Viewed (geographical distribution)
Total article views: 2,967 (including HTML, PDF, and XML)
Thereof 2,799 with geography defined
and 168 with unknown origin.
Total article views: 2,269 (including HTML, PDF, and XML)
Thereof 2,160 with geography defined
and 109 with unknown origin.
Total article views: 698 (including HTML, PDF, and XML)
Thereof 639 with geography defined
and 59 with unknown origin.
| Country | # | Views | % |
|---|
| Country | # | Views | % |
|---|
| Country | # | Views | % |
|---|
| Total: | 0 |
| HTML: | 0 |
| PDF: | 0 |
| XML: | 0 |
- 1
1
| Total: | 0 |
| HTML: | 0 |
| PDF: | 0 |
| XML: | 0 |
- 1
1
| Total: | 0 |
| HTML: | 0 |
| PDF: | 0 |
| XML: | 0 |
- 1
1
Cited
14 citations as recorded by crossref.
- Source identification of carbon monoxide over the greater Tokyo area: Tower measurement network and evaluation of global/regional model simulations at different resolutions S. Itahashi et al. 10.1016/j.aeaoa.2024.100284
- Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles S. Ishidoya et al. 10.5194/acp-25-1965-2025
- “Urban Respiration” Revealed by Atmospheric O2 Measurements in an Industrial Metropolis X. Liu et al. 10.1021/acs.est.2c07583
- Using eddy-covariance to measure the effects of COVID-19 restrictions on CO 2 emissions in a neighborhood of Indianapolis, IN E. Vogel et al. 10.1080/17583004.2024.2365900
- Tall tower eddy covariance measurements of CO2 fluxes in Vienna, Austria B. Matthews & H. Schume 10.1016/j.atmosenv.2022.118941
- Separating above-canopy CO2 and O2 measurements into their atmospheric and biospheric signatures K. Faassen et al. 10.5194/bg-21-3015-2024
- Analysis of environmental degradation in Maceió-Alagoas, Brazil via orbital sensors: A proposal for landscape intervention based on urban afforestation W. Correia Filho et al. 10.1016/j.rsase.2021.100621
- Harmonized gap-filled datasets from 20 urban flux tower sites M. Lipson et al. 10.5194/essd-14-5157-2022
- Measurement report: Method for evaluating CO2 emissions from a cement plant using atmospheric δ(O2 ∕ N2) and CO2 measurements and its implication for future detection of CO2 capture signals S. Ishidoya et al. 10.5194/acp-24-1059-2024
- Source decomposition of eddy-covariance CO2 flux measurements for evaluating a high-resolution urban CO2 emissions inventory K. Wu et al. 10.1088/1748-9326/ac7c29
- Discussion on key issues of carbon footprint accounting for bast fiber textiles J. Liu et al. 10.1016/j.scitotenv.2023.166272
- Satellite observations reveal a decreasing albedo trend of global cities over the past 35 years S. Wu et al. 10.1016/j.rse.2024.114003
- A modeling approach to investigate drivers, variability and uncertainties in O2 fluxes and O2 : CO2 exchange ratios in a temperate forest Y. Yan et al. 10.5194/bg-20-4087-2023
- Anthropogenic CO2 Emissions Changes in an Urban Area of Tokyo, Japan, Due to the COVID‐19 Pandemic: A Case Study During the State of Emergency in April–May 2020 H. Sugawara et al. 10.1029/2021GL092600
14 citations as recorded by crossref.
- Source identification of carbon monoxide over the greater Tokyo area: Tower measurement network and evaluation of global/regional model simulations at different resolutions S. Itahashi et al. 10.1016/j.aeaoa.2024.100284
- Diurnal, seasonal, and interannual variations in δ(18O) of atmospheric O2 and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles S. Ishidoya et al. 10.5194/acp-25-1965-2025
- “Urban Respiration” Revealed by Atmospheric O2 Measurements in an Industrial Metropolis X. Liu et al. 10.1021/acs.est.2c07583
- Using eddy-covariance to measure the effects of COVID-19 restrictions on CO 2 emissions in a neighborhood of Indianapolis, IN E. Vogel et al. 10.1080/17583004.2024.2365900
- Tall tower eddy covariance measurements of CO2 fluxes in Vienna, Austria B. Matthews & H. Schume 10.1016/j.atmosenv.2022.118941
- Separating above-canopy CO2 and O2 measurements into their atmospheric and biospheric signatures K. Faassen et al. 10.5194/bg-21-3015-2024
- Analysis of environmental degradation in Maceió-Alagoas, Brazil via orbital sensors: A proposal for landscape intervention based on urban afforestation W. Correia Filho et al. 10.1016/j.rsase.2021.100621
- Harmonized gap-filled datasets from 20 urban flux tower sites M. Lipson et al. 10.5194/essd-14-5157-2022
- Measurement report: Method for evaluating CO2 emissions from a cement plant using atmospheric δ(O2 ∕ N2) and CO2 measurements and its implication for future detection of CO2 capture signals S. Ishidoya et al. 10.5194/acp-24-1059-2024
- Source decomposition of eddy-covariance CO2 flux measurements for evaluating a high-resolution urban CO2 emissions inventory K. Wu et al. 10.1088/1748-9326/ac7c29
- Discussion on key issues of carbon footprint accounting for bast fiber textiles J. Liu et al. 10.1016/j.scitotenv.2023.166272
- Satellite observations reveal a decreasing albedo trend of global cities over the past 35 years S. Wu et al. 10.1016/j.rse.2024.114003
- A modeling approach to investigate drivers, variability and uncertainties in O2 fluxes and O2 : CO2 exchange ratios in a temperate forest Y. Yan et al. 10.5194/bg-20-4087-2023
- Anthropogenic CO2 Emissions Changes in an Urban Area of Tokyo, Japan, Due to the COVID‐19 Pandemic: A Case Study During the State of Emergency in April–May 2020 H. Sugawara et al. 10.1029/2021GL092600
Latest update: 27 Jul 2025
Short summary
Atmospheric O2 and CO2 concentrations, along with CO2 flux, have been observed in a megacity, Tokyo, Japan. The O2 : CO2 exchange ratio for net turbulent O2 and CO2 fluxes (ORF) between the urban area and the overlaying atmosphere was obtained, and we applied it to estimate the diurnal cycles of CO2 fluxes from gas and liquid fuel consumption separately. We found simultaneous observations of ORF and CO2 flux are useful in validating CO2 emission inventories from statistical data.
Atmospheric O2 and CO2 concentrations, along with CO2 flux, have been observed in a megacity,...
Altmetrics
Final-revised paper
Preprint