Influence of atmospheric circulation on regional 14CO2 differences

Hua, Quan and Barbetti, Mike (2007) Influence of atmospheric circulation on regional 14CO2 differences. Journal of Geophysical Research, 112 19: D19102.1-D19102.13. doi:10.1029/2006JD007898


Author Hua, Quan
Barbetti, Mike
Title Influence of atmospheric circulation on regional 14CO2 differences
Formatted title
Influence of atmospheric circulation on regional 14CO2 differences
Journal name Journal of Geophysical Research   Check publisher's open access policy
ISSN 0148-0227
2156-2202
Publication date 2007-10-04
Sub-type Article (original research)
DOI 10.1029/2006JD007898
Volume 112
Issue 19
Start page D19102.1
End page D19102.13
Total pages 13
Place of publication Washington, DC, U.S.A.
Publisher American Geophysical Union
Language eng
Formatted 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.
Keyword Meteorology & Atmospheric Sciences
Ucla Radiocarbon Dates
Annual Tree-rings
Bomb C-14
Troposphere
Thailand
Tracer
Level
Age
CO2
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
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Created: Mon, 18 Feb 2008, 15:19:58 EST