Influence of atmospheric circulation on regional 14CO2 differences
Abstract
Detailed analyses of published 14C data from tree rings and atmospheric CO2 samples for the northern tropics in Asia (India, Thailand, and Vietnam) and Africa (Ethiopia) have been performed for the heavily bomb‐influenced period 1963–1967 A.D. The results show that the Asian summer monsoon and Intertropical Convergence Zone (ITCZ) position influenced atmospheric 14CO2 over the study area. Similar analyses of atmospheric records for northern and western Europe, northwestern Africa, and the northeastern United States and tree ring data for east Asia show that the Northern Hemisphere distribution of bomb 14C for 1963–1967 depended on atmospheric circulation controlled by the seasonal positions of Hadley cell boundaries and the ITCZ. The distribution of 14C did not have a simple latitudinal dependence. This work shows that the seasonal atmospheric circulation patterns are crucial for the description of atmospheric 14C gradients during the bomb peak period. These principles can be applied to the interpretation of the small intrahemispheric 14C offsets of the remote past.
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Data from northern Norway from trees growing during the peak of nuclear weapons testing also had higher 14C but may not be representative of natural offsets due to the high latitude of many of the atmospheric bomb tests.
“Data from northern Norway from trees growing during the peak of nuclear weapons testing also had higher 14 C (Hua and Barbetti 2007; Svarva et al. 2019) but may not be representative of natural offsets due to the high latitude of many of the atmospheric bomb tests.”
From The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP) (2020) · cites this paper as Hua and Barbetti 2007
Cites
Anthropogenic and solar components of hemispheric <sup>14</sup>C
Stuiver, M., & Braziunas, T. F. (1998) · Geophysical Research Letters · doi:10.1029/97gl03694 · Cited by 110 · see citing works
Kromer, B., Manning, S. W., Kuniholm, P. I., Newton, M. W., Spurk, M., & Levin, I. (2001) · Science · doi:10.1126/science.1066114 · Cited by 77 · see citing works
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The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Reimer, P. J., Austin, W. E. N., Bard, E., Bayliss, A., Blackwell, P. G., Bronk Ramsey, C., Butzin, M., Cheng, H., Edwards, R. L., Friedrich, M., et al. (2020) · Radiocarbon · doi:10.1017/rdc.2020.41 · Cited by 7,900 · see citing works
“Data from northern Norway from trees growing during the peak of nuclear weapons testing also had higher 14 C (Hua and Barbetti 2007; Svarva et al. 2019) but may not be representative of natural offsets due to the high latitude of many of the atmospheric bomb tests.”
BackgroundSHCal20 Southern Hemisphere calibration, 0–55,000 years cal BP
Hogg, A. G., Heaton, T. J., Hua, Q., Palmer, J. G., Turney, C. S., Southon, J., Bayliss, A., Blackwell, P. G., Boswijk, G., Bronk Ramsey, C., et al. (2020) · Radiocarbon · doi:10.1017/rdc.2020.59 · Cited by 1,530 · see citing works
Self-citationAtmospheric radiocarbon for the period 1950–2010
Hua, Q., Barbetti, M., & Rakowski, A. Z. (2013) · Radiocarbon · doi:10.2458/azu_js_rc.v55i2.16177 · Cited by 1,019 · see citing works
Self-citationMarsh, E. J., Bruno, M. C., Fritz, S. C., Baker, P., Capriles, J. M., & Hastorf, C. A. (2018) · Radiocarbon · doi:10.1017/rdc.2018.16 · Cited by 109 · see citing works
Mediterranean radiocarbon offsets and calendar dates for prehistory
Manning, S. W., Kromer, B., Cremaschi, M., Dee, M. W., Friedrich, R., Griggs, C., & Hadden, C. S. (2020) · Science Advances · doi:10.1126/sciadv.aaz1096 · Cited by 41 · see citing works
The 1953–1965 rise in Atmospheric bomb <sup>14</sup>C in Central Norway
Svarva, H., Grootes, P., Seiler, M., Stene, S., Thun, T., Værnes, E., & Nadeau, M.-J. (2019) · Radiocarbon · doi:10.1017/rdc.2019.98 · Cited by 14 · see citing works
- Authors
- Hua, Q., & Barbetti, M.
- Affiliations
- Australian Nuclear Science and Technology Organisation (AU)
- The University of Queensland (AU)
- ORCID
- Hua, Quan
- Venue
- Journal of Geophysical Research: Atmospheres
- Publisher
- American Geophysical Union (AGU)
- Published
- 2007-10-04
- Volume
- 112
- Issue
- D19
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2080958440
- Cited by
- 48
- References
- 2
- Citations by year
- 2026: 1 · 2025: 4 · 2023: 2 · 2022: 1 · 2021: 6 · 2020: 5 · 2019: 2 · 2018: 6 · 2017: 3 · 2016: 5 · 2014: 1 · 2013: 5 · 2012: 1
- FWCI
- 0.89
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Geophysical Research Atmospheres (publishedVersion)
- The Australian Nuclear Science and Technology Organisation Institutional Repository (The Australian Nuclear Science and Technology Organisation) (submittedVersion)
- Funders
- Australian Institute of Nuclear Science and Engineering
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Tree-ring climate responses
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Keywords
- bomb 14C, atmospheric CO2, atmospheric circulation, Intertropical Convergence Zone, tree rings, summer monsoon
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