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Climatic Change

, Volume 26, Issue 2–3, pp 299–307 | Cite as

Major wet interval in white mountains medieval warm period evidenced inδ13C of bristlecone pine tree rings

  • Steven W. Leavitt
Article

Abstract

A longδ13C chronology was developed from bristlecone pine (Pinus longaeva) at the Methuselah Walk site in the White Mountains of California. The chronology represents cellulose from five-year ring groups pooled from multiple radii of multiple trees. The most dramatic isotopic event in the chronology appears from A.D. 1080–1129, whenδ13C values are depressed to levels ~ 2σ below the mean for the period A.D. 925–1654. This isotopic excursion appears to represent a real event and is not an artifact of sampling circumstances; in fact, a similar excursion occurs in a previously-reported, independentδ13C chronology from bristlecone pine. By carbon isotope fractionation models, the shift to lowδ13C values is consistent with abundant soil moisture, permitting leaf stomata to remain open, and allowing ready access of CO2 from which carbon fixation may discriminate more effectively against13C in favor of12C. According to this model, the13C-depleted 50-yr isotopic excursion represents the wettest period in the White Mountains in the past 1000 yr, during which isotope-reconstructed July Palmer Drought Severity Indices averaged ~ +2.2.

Keywords

Carbon Isotope Tree Ring Drought Severity Isotope Fractionation Isotopic Event 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Craig, H.: 1957, ‘Isotopic Standards for Carbon and Oxygen and Correction Factors for Mass-Spectrometric Analysis of CO2’,Geochim. Cosmochim. Acta 12, 133–149.Google Scholar
  2. DeNiro, M. J. and Cooper, L. W.: 1989, ‘Post-Photosynthetic Modification of Oxygen Isotope Ratios of Carbohydrates of Potato: Implications for Paleoclimate Reconstruction Based on Isotopic Analysis of Wood Cellulose’,Geochem. Cosmochim. Acta 53, 2573–2580.Google Scholar
  3. Drew, L. G. (ed.): 1972,Tree-Ring Chronologies of Western America III California and Nevada, Lab. of Tree-Ring Research, University of Arizona, Tucson, Chronology Series 1.Google Scholar
  4. Epstein, S. and Yapp, C. J.: 1976, ‘Climatic Implications of the D/H Ratio of Hydrogen in C-H Groups in Tree Cellulose’,Earth Planet Sci. Lett. 30, 252–261.Google Scholar
  5. Farquhar, G. D., O'Leary, M. H., and Berry, J. A.: 1982, ‘On the Relationship between Carbon Isotope Discrimination and the Intercellular Carbon Dioxide Concentration in Leaves’,Austr. J. Plant Phys. 9, 121–137.Google Scholar
  6. Freyer, H. D. and Belacy, N.: 1983, ‘13C/12C Records in Northern Hemispheric Trees during the Past 500 Years. Anthropogenic Impact and Climate Superpositions’,J. Geophys. Res. 88, 6844–6852.Google Scholar
  7. Fritts, H.: 1976,Tree Rings and Climate, Academic, New York, 567 pp.Google Scholar
  8. Green, J. W.: 1963, ‘Wood Cellulose’ in Whistler, R. L. (ed.),Methods of Carbohydrate Chemistry, Academic, New York, pp. 9–21.Google Scholar
  9. Karl, T. R., Metcalf, L. K., Nicodemus, M. L., and Quayle, R. G.: 1983,Historical Climatology Series 6-1: Statewide Average Climatic History, NOAA, National Climate Data Center, Asheville, North Carolina.Google Scholar
  10. Leavitt, S. W. and Long, A.: 1984, ‘Sampling Strategy for Stable Carbon Isotope Analysis in Pine’,Nature 311, 145–147.Google Scholar
  11. Leavitt, S. W. and Long, A.: 1988, ‘Stable Carbon Isotope Chronologies from Trees in the Southwestern United States’,Glob. Biogeochem. Cycl. 2, 189–198.Google Scholar
  12. Leavitt, S. W. and Long, A.: 1989a, ‘Drought Indicated in Carbon-13/Carbon-12 Ratios of Southwestern Tree Rings’,Water Res. Bull. 25, 341–347.Google Scholar
  13. Leavitt, S. W. and Long, A.: 1989b, ‘Intertree Variability ofδ 13C in Tree Rings’, in Rundel, P. W., Ehleringer, J. R., and Nagy, K. A., (eds.),Stable Isotopes in Ecological Research. Springer-Verlag, New York, pp. 95–104.Google Scholar
  14. Palmer, W. C.: 1965,Meteorological Drought, U.S. Weather Bureau Research Paper No. 45. U.S. Dept. of Commerce, Washington, D.C.Google Scholar
  15. Peng, T. H., Broecker, W. S., Freyer, H. D., and Trumbore, S.: 1983, ‘A Deconvolution of the Tree-Ring Basedδ 13C Record’,J. Geophys. Res. 88, 3609–3620.Google Scholar
  16. Ramesh, R., Bhattacharya, S. K., and Gopalan, K.: 1986, ‘Climatic Correlations in Stable Isotope Records of Silver Fir (Abies pindrow) Trees from Kashmir, India’,Earth Planet. Sci. Lett. 79, 66–74.Google Scholar
  17. Stine, S.: 1990, ‘Late Holocene Fluctuations of Mono Lake, Eastern California’,Palaeogeog. Palaeoclimat. Palaeoecol. 78, 333–381.Google Scholar
  18. Stuiver, M.: 1978, ‘Atmospheric Carbon Dioxide and Carbon Reservoir Changes’,Science 199, 253–258.Google Scholar
  19. Stuiver, M., Burk, R. L., and Quay, P. D.: 1984, ‘13C/12C Ratios in Tree Rings and the Transfer of Biospheric Carbon to the Atmosphere’,J. Geophys. Res. 89, 11731–11748.Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Steven W. Leavitt
    • 1
  1. 1.Laboratory of Tree-Ring ResearchThe University of ArizonaTucsonUSA

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