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Dendrochemistry of White Mountain bristlecone pines: An investigation via Synchrotron Radiation Scanning X-Ray Fluorescence Microscopy
Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell Tree-Ring Laboratory, Cornell University, Ithaca, New York, USA
Cornell High Energy Synchrotron Source, Wilson Laboratory, Cornell University, Ithaca, New York, USA
Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell Tree-Ring Laboratory, Cornell University, Ithaca, New York, USA
Laboratory of Tree-Ring Research, University of Arizona, Tuscon, Arizona, USA
Cornell High Energy Synchrotron Source, Wilson Laboratory, Cornell University, Ithaca, New York, USA
Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell Tree-Ring Laboratory, Cornell University, Ithaca, New York, USA
Synchrotron Radiation Scanning X-Ray Fluorescence Microscopy (SXFM) was used for the first spatially/temporally resolved investigation of the multielemental chemistry of bristlecone pine (Pinus longaeva D.K. Bailey). A new protocol was designed to apply this nondestructive method of analysis to this unique palaeoclimatological resource, extracting previously inaccessible dendrochemical information at subannual resolution from tree rings ranging from 1400 to 40 μm. The potential of Pinus longaeva was assessed for the reconstruction of multicentennial annual resolution sequences of elemental change, with specific focus on the identification of multielemental markers for major, climatically effective volcanic eruptions. Increases in calcium (Ca), strontium (Sr), manganese (Mn), and zinc (Zn) were identified in association with frost rings around AD1601, following the eruption of Huaynaputina, Peru, but these could not be directly attributed to volcanogenic changes in environmental chemistry. Elemental patterns for 500 years from five trees demonstrated little agreement indicating that, for the elements detected, this species may be unsuitable for temporal reconstructions of external chemistry. Further development of SXFM dendrochemical technique, however, offers much potential for future work.
Received 24 July 2008; accepted 23 January 2009; published 25 March 2009.
Citation: (2009), Dendrochemistry of White Mountain bristlecone pines: An investigation via Synchrotron Radiation Scanning X-Ray Fluorescence Microscopy, J. Geophys. Res., 114, G01023, doi:10.1029/2008JG000830.
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