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Regional atmospheric 14C offsets and atmospheric circulation
| Tree rings (Pinus kesiya) from central Thailand. |
Investigations of regional atmospheric 14C offsets have been carried out for the northern tropics in Asia and Africa, the North Atlantic region, and East Asia based on published 14C in tree rings and atmospheric data sets during the bomb peak period.
Measurements of 14C in tree rings from Thailand, during the latter part of the Little Ice Age and the pre-bomb period, have also been conducted.
These results indicate that seasonal atmospheric circulation patterns are crucial for the understanding of regional atmospheric 14C differences. This notion can be applied to the interpretation of small regional 14C offsets of the remote past.
Project support
AINSE Grants 00/004, 00/005 & 02/165
Project team members
Mike Barbetti (Faculty of Agriculture, Natural Resources and Environment, Naresuan University, Thailand) and Quan Hua (ANSTO).
Publications related to this project
Hua, Q., M. Barbetti, V.A. Levchenko, R.D. D’Arrigo, B.M. Buckley, and A.M. Smith (2012), Monsoonal influence on Southern Hemisphere 14CO2, Geophysical Research Letters, 39, L19806, doi:10.1029/2012GL052971.
Hua, Q., and M. Barbetti (2007), Influence of atmospheric circulation on regional 14CO2 differences, Journal of Geophysical Research, 112, D19102, doi:10.1029/2006JD007898.
Hua, Q., M. Barbetti, and U. Zoppi (2004), Radiocarbon in annual tree rings from Thailand during the prebomb period, AD 1938-1954, Radiocarbon, 46, 925-932.
Hua, Q., M. Barbetti, U. Zoppi, D. Fink, M. Watanasak, and G.E. Jacobsen (2004), Radiocarbon in tropical tree rings during the Little Ice Age, Nuclear Instruments and Methods in Physics Research B, 223-224, 489-494.
Abstracts related to this project
Hua, Q., Regional atmospheric 14C offsets, Keynote lecture at The 4th East Asia AMS Symposium, 16-18 Dec 2011, Tokyo, Japan.
Hua, Q., and M. Barbetti, Regional atmospheric circulation: Insights from radiocarbon in southern Asian tree rings, The 1st Asian Dendrochronology Conference and Workshop, 9-15 Sep 2007, Bangkok, Thailand.
Hua, Q., M. Barbetti, R. DArrigo, and A.M. Smith, Regional atmospheric circulation: Insights from bomb radiocarbon in Indonesian tree rings, The 19th International Radiocarbon Conference, 3-7 Apr 2006, Oxford, UK.
Hua, Q., and M. Barbetti, Influence of atmospheric circulation on regional atmospheric 14C, The 18th International Radiocarbon Conference, 1-5 Sep 2003, Wellington, New Zealand.
Hua, Q., U. Zoppi, D. Fink, G. Jacobsen, M. Barbetti, and M. Watanasak, Atmospheric radiocarbon offset for the tropics during the Little Ice Age, Cape Grim Baseline Air Pollution Station, Annual Science Meeting, 7-8 Nov 2002, Melbourne, Australia.
Hua, Q., M. Barbetti, U. Zoppi, D. Fink, and G. Jacobsen, Radiocarbon in tropical tree rings during the Little Ice Age, The 9th International Conference on AMS, 9-13 Sep 2002, Nagoya, Japan.
Hua, Q., M. Barbetti, U. Zoppi, and E.M. Lawson, Regional reduction of atmospheric 14C by upwelling in the tropical Indian Ocean, The 17th International Radiocarbon Conference, 18-23 Jun 2000, Judean Hills, Israel.