Steven W. Leavitt
May 2014

TITLE- Professor of Dendrochronology and Associate Director, Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ  85721

                                    (Phone 520-621-6468; FAX 520-621-8229; e-mail



            May 1982         Ph.D. Geosciences.  University of Arizona, Tucson

(Dissertation title: Inference of past atmospheric δ13C and PCO2 from 13C/12C measurements in tree rings)

            Aug 1977         M.S. Environmental Sciences.  University of Virginia, Charlottesville

(Thesis title: Soil-plant relationships of nutrient and non-nutrient metals in Louisa Co., Virginia)

            June 1971         B.S. Geology.  University of Illinois, Urbana

(Thesis title: The geology and genesis of magmatic iron deposits at Kiruna and Gellivare, Sweden, and Iron Mountain, Missouri)


            Jan 2008 to present     Associate Director, Laboratory of Tree-Ring Research

            Jul 1996 to present        Professor, University of Arizona

            Jul 1992 to Jul 1993      Acting Director, Laboratory of Tree-Ring Research

            Aug 1990 to Jun 1996   Associate Professor of Dendrochronology, University of Arizona

            Jul 1989 to Aug 1990    Associate Professor of Geology, University of Wisconsin-Parkside
            Aug 1984 to Jul 1989    Assistant Professor of Geology, University of Wisconsin-Parkside

            Jun 1982 to Jul 1984     Post-doc Research Assoc., University of Arizona, Dept. of  Geosciences


            The Weather, Earth & Man, Environmental Earth Science, Geochemistry, Environmental Geology, Hydrogeology, Dendrochronology, Senior Seminar, Mineralogy, Petrology, Tree Rings as Chronometers, Dendrochronology: Biological Applications, Global Biogeochemical Cycles, Introduction to Global Change (Nats101), Isotope Dendrochonology, Natural History of the Southwest.


            Dr. Leavitt's research centers on past, present and future global change, and is variously involved with light stable-isotope analysis of tree rings, native plant leaves, crop plants, and geological materials: stable-isotope dendrochronology; light stable-isotope geochemistry applied to geological and environmental problems; the global carbon cycle in geologic time and the recent imbalance from anthropogenic effects; environmental and climate reconstructions with particular interest in the last 15,000 years.


Membership: The Geochemical Society, American Geophysical Union, The Tree-Ring Society, American Quaternary Association (executive council member), Ecological Society of America

Editor: Tree-Ring Research (2002-present); Editorial Board: Radiocarbon; Communicating Editor: Trees-Structure and Function (2006-present)

Ad Hoc manuscript peer review for 40 different journals & proposal review for 12 agencies since 1994; >50 proposals and >150 manuscripts from 2005 through 2013


            Dr. Leavitt routinely contributes to intramural service at the Department, College and University levels through membership on several committees.  Most notable among these was service on the Provost's University Promotion and Tenure Committee (1996-99).  Dr. Leavitt also served as Chairman of the Global Change Interdisciplinary Program from which the Global Change Ph.D. Minor is administered (1997-99).  Dr. Leavitt's outreach activities include general talks to service organizations, and lecturing at a "Stable Isotope Ecology Course" held at the University of Utah in June (1996-2014, except 2000 and 2006).



PI         NSF, "Support for AmeriDendro Conference; Tucson, AZ; May 13-17, 2013" with Thomas W. Swetnam (co-PI), May 1, 2013, to April 30, 2014,  $9463.

Co-PI   NSF, “COLLABORATIVE RESEARCH: Processes and Patterns in The North American Monsoon Macrosystem”, Monson R. (PI) et al., April 1, 2011 to Mar. 31, 2016, $2,949,061 to UA.

Collaborator NSF, "Collaborative Research: Terrestrial Late Pleistocene paleoenvironment back to MIS 3 from fossil microflora and tree rings in recently excavated landslide deposits, western Oregon", Tim Jull (PI), Peter Van de Water (co-PI), Irina Panyushkina (co-PI), April 16, 2011, to April 15, 2013, ca. $145,000 [no-cost extension to April 15, 2014]

Co-PI   NSF, "Reconstructing Winter Temperatures in the Rockies using Tree-Ring Oxygen Isotopes", with Connie Woodhouse (PI), Adam Csank (co-PI), September 1, 2011 to August 31, 2013, $239,050 [no-cost extension to August 31, 2014]

Co-PI   NSF, "Flickering Climate: Assessment of the Non-Stationary Environment in the Great Lakes Area, 14 ka to 8 ka BP- A Time of Rising Human Population and Mega-Fauna Extinction" with Irina Panyushkina (PI) September 15, 2010August 31, 2013, $597K. [no-cost extension to August 14, 2014]

PI- U.S. Civilian Research and Development Foundation (CRDF), Russian/US proposal “Influence of changes in temperature and moisture on structure and composition of annual rings in Siberian trees” with Gene Vaganov (Russian PI), and other co-PIs, Dec 1, 2009 to Nov 30, 2011, $40K.

Co-PI   NSF, “An Investigation of North American Monsoon Variability using Instrumental and Tree-Ring Data”, with Connie Woodhouse (PI), Ramzi Touchan, Dave Meko Chris Castro (Co-PIs), Sept. 1, 2008, to Aug. 31, 2011, ca. $600K [no-cost extensions to Aug. 31, 2013]

Co-PI  IALC (Intl. Arid Lands Consortium), “Climate Response of Growth and Water Use in Semi-Arid Pine Forest”, with Dan Yakir (PI), Dec 1, 2003, to Nov. 30, 2005, ca. $100K.

Co-PI  NSF, "High-resolution Younger Dryas environmental Variability: A Comprehensive Assessment from Mid-North America Tree Rings" with Irina Panyushkina (PI), Jul. 1, 2002, to June 30, 2005 (Extended to June 30, 2006), ca. $220K


PUBLICATIONS OF LAST 5 YEARS (of ca. 150 in all categories since 1979)-


Liu, X., An, W., Leavitt, S.W., Wang, W., Xu, G., Zeng, X., and Qin, D., 2014. Recent strengthening of correlations between tree-ring δ13C and δ18O in mesic western China: Implications to climatic reconstruction and physiological responses.  Global and Planetary Change 113:23–33

Liu, Y., Wang, Y., Li, Q., Song, H., Linderhlom, H.W., Leavitt. S.W., Wang, R., An, Z., 2014. Tree-ring stable carbon isotope-based May-July temperature reconstruction over Nanwutai, China, for the past century and its record of 20th century warming. Quaternary Science Reviews, JQSR-D-13-00339. Accepted 26 March 2014.

Jull, A.J.T., Panyushkina, I.P., Lange, T.E., Kukarskih, V.V., Myglan, V.S., Clark, K.J., Salzer, M.W., Burr, G.S., and Leavitt. S.W., 2014.  Excursions in the 14C record at AD 774-775 in tree rings from Russia and America. Geophysical Research Letters doi: 10.1002/2014GL059874.


An, W., Liu, X., Leavitt, S.W., Ren, J., Xu, G., Zeng, X., Wang, W., Qin, D., and Ren, J., 2013.  Relative humidity history and coherence between tree-ring δ18O and δD on the Batang - Litang Plateau, western China, since AD 1755. Climate Dynamics DOI 10.1007/s00382-013-1937-z, published online 17 Sept. 2013.

Csank, A.Z., Fortier, D., and Leavitt, S.W., 2013. Annually resolved temperature reconstructions from a late Pliocene-early Pleistocene polar forest on Bylot Island.  Palaeogeography, Palaeoclimatology, Palaeoecology 369:313–322.

Grachev A.M., Vaganov E.A., Leavitt S.W., Panyushkina I.P., Chebykin E.P., Shishov V.V., Zhuchenko N.A., Knorre A.A., Hughes M.K., Naurzbaev M.M., 2013. Methodology for development of a 600-year tree-ring multi-element record for larch from the Taymir Peninsula, Russia. Journal of Siberian Federal University Biology 6(1):61-72.

Griffin, D., Woodhouse, C.A., Meko, D.M., Stahle, D.W., Faulstich, H.L., Carrillo, C., Touchan, R., Castro, C.L., Leavitt, S.W., 2013. North American monsoon precipitation reconstructed from tree-ring latewood.  Geophysical Research Letters 40(5):954–958, DOI: 10.1002/grl.50184.

Hultine, K.R., Dudley, T.L., and Leavitt, S.W., 2013. Herbivory-induced mortality increases with radial growth in an invasive riparian phreatophyte.  Annals of Botany 11(6):1197-206, doi: 10.1093/aob/mct077.

Liu, X., Zeng, X., Leavitt, S.W., Wang, W., An, W., Xu, G., Sun, W., Wang, Y., Qin, D., and Ren, J., 2013. A 400-year tree-ring δ18O chronology for the southeastern Tibetan Plateau: Implications for inferring variations of the regional hydroclimate. Global and Planetary Change 104:23–33.

Meko, D.M.,  Touchan, R., Villanueva Díaz, J., Griffin, D., Woodhouse, C.A., Castro, C.L., Carillo, C. and Leavitt, S.W., 2013. Sierra San Pedro Mártir, Baja California, cool-season precipitation reconstructed from earlywood width of Abies concolor tree rings. Journal of Geophysical Research. 118(4):1660–1673, DOI: 10.1002/2013JG002408.

Panyushkina, I.P. and Leavitt, S.W., 2013.  Ancient boreal forests under the environmental instability of the glacial to post-glacial transition in the Great Lakes region (14,000-11,000 years BP). Canadian J. of Forest Research 43:1032–1039


An, W., Liu, X., Leavitt, S.W., Sun, W., Wang, W., Wang, Y., Xu, G., Chen, T., Ren, J., and Qin, D., 2012. Specific climatic signals recorded in earlywood and latewood δ18O of tree rings in southwestern China. Tellus B, 64, 18703,

Creasman, P.P., Bannister, B., Towner, R.H., Dean, J.S., and Leavitt, S.W., 2012.  Reflections on the foundation, persistence, and growth of the Laboratory of Tree-Ring Research, circa 1930–1960.  Tree-Ring Research 68(2):81-89.

Liu, X., An, W., Treydte, K., Shao, X., Leavitt, S., Hou, S., Chen, T., Sun, W., and Qin, D., 2012. Tree-ring δ18O in southwestern China linked to variations in regional cloud cover and tropical sea surface temperature. Chemical Geology 291:104–115, doi:10.1016/j.chemgeo.2011.10.001.

Liu, Y., Wang, R., Leavitt, S.W., Song, H., Linderhlom, H.W., Li, Q., and An, Z., 2012.  Individual and pooled tree-ring stable-carbon isotope series in Chinese pine from the Nan Wutai region, China: Common signal and climate relationships. Chemical Geology 330-331:17-26.

Linderholm, H.W., Liu, Y., Leavitt, S.W., and Liang, E., 2012.  Dendrochronology in Asia. Guest Editorial. Quaternary International 330-331:1-2.


Bale, R. J., Robertson, I., Salzer, M.W., Loader, N. J., Leavitt, S.W., Gagen, M., Harlan, T.P., McCarroll, D., 2011. A 920 year climate reconstruction of the White Mountains of California using carbon isotope values from bristlecone pine cellulose. Quaternary Research 76:22-19.

Griffin, D., Meko, D.M., Touchan, R., Leavitt, S.W., and Woodhouse, C.A., 2011. Latewood chronology development for summer-moisture reconstruction in the U.S. Southwest.  Tree-Ring Research 67(2):87-101.

Zhang, Y. Tian, Q. Gou, X. Chen, F. Leavitt, S.W., Wang, Y., 2011. Annual precipitation reconstruction since A.D. 775 based on tree rings from the Qilian Mountains, northwestern China. International Journal of Climatology, Volume 31(3): 371–381 DOI: 10.1002/joc.2085.

Leavitt, S.W., Woodhouse, C.A., Castro, C.L., Wright, W.E., Meko, D.M., Touchan, R., Griffin, D., Ciancarelli, B., 2011.  The North American Monsoon in the U.S. Southwest:  Potential for investigation with tree-ring carbon isotopes. Quaternary International 235: 101-107.

Maseyk, K.,  Hemming, D., Angert, A., Leavitt, S.W., and Yakir, D., 2011.  Increase in water-use efficiency and underlying processes in pine forests across a precipitation gradient in the dry Mediterranean region over the past 30 years. Oecologia 167(2):573-585.

Wang, W., Liu, X., Shao, X., Leavitt, S., Xu, G.B., An, W.L., Qin, D.H., 2011. A 200 year temperature record from tree ring δ 13C at the Qaidam Basin of the Tibetan Plateau after identifying the optimum method to correct for changing atmospheric CO2 and δ13C.  Journal of Geophysical Research-Biogeosciences 116, DOI: 10.1029/2011JG001665.


Bale, R.J., Robertson, I., Leavitt, S.W., Loader, N.J., Harlan, T.P., Gagen, M.H., Young, G.H.F., Csank, A.Z., Froyd, C.A., McCarroll, D., 2010. Temporal stability in bristlecone pine tree-ring δ 18O  chronologies over the last two centuries. The Holocene 20(1):3-6.

Leavitt, S.W., Treydte, K., Yu, L., 2010.  Environment in time and space: Opportunities from tree-ring isotope networks. IN Understanding Movement, Pattern, and Processes on Earth Through Isotope Mapping, West, J.B.; Bowen, G.J.; Dawson, T.E.; Tu, K.P. (eds.), Ch. 6, Springer, Dordrecht, pp. 113-135.

Kagawa, A., Leavitt, S.W., 2010. Stable carbon isotopes of tree rings as a tool to pinpoint timber geographic origin. J. of Wood Science, doi: 10.1007/s10086-009-1085-6. Special Issue “Wood Science and Technology for Mitigation of Global Warming”.


Leavitt, S.W., 2009. Carbon isotopes- stable. IN Encyclopedia of Paleoclimatology and Ancient Environments (Encyclopedia of Earth Sciences Series), Gornitz, Vivien (Ed.), pp. 133-136. ISBN: 978-4020-4551-6, 1049 p.

Leavitt, S.W., 2009. Editor’s Note. Tree-Ring Research 65(1): 3.

Leavitt, S.W. and Bannister, B., 2009.  Dendrochronology and radiocarbon dating: The Laboratory of Tree-Ring Research connection. Radiocarbon 51:373-384.

Leavitt, S.W., Follett, R.F., 2009. Stable-carbon isotopes of U.S. Great Plains soils and climate events during the Holocene.  SSSA Special paper. Ch. 14, pp. 223-232, Soil Carbon Sequestration and the Greenhouse Effect, 2nd edtion, edited by Rattan Lal, Ronald F. Follett, SSSA Special Publ. 57.

Pewe, T.L., Westgate, J.A., Preece, S.J., Brown, P.M. and Leavitt, S.W., 2009. Late Pliocene Dawson Cut Forest Bed and new tephrochronological findings in the Gold Hill Loess, east-central Alaska.  GSA Bulletin 121(1/2):294–320, DOI: 10.1130/B26323.1.

Porteaus, F., Hill, J., Ball, A.S., Pinter, P.J., Kimball, B.A., Wall, G.W., Adamsen, F.J., Hunsaker, D.J. , LaMorte, R.L., Leavitt, S.W., Thompson, T.L., Matthias, A.D., Brooks, T.J., Morris, C.F., 2009.  Effect of Free Air Carbon dioxide Enrichment (FACE) on the chemical composition and nutritive value of wheat grain and straw.  Animal Feed Science and Technology 149:322–332.  

Schneider, A.F., Leavitt, S.W., and Lange, T., 2009. Stratigraphy, age and flora of the Southport forest bed, Southeastern Wisconsin.  Journal of Great Lakes Research 35: 538–547.


Anchukaitis, K.J., Evans, M.N., Lange, T., Smith, D.R., Leavitt, S.W., and Schrag, D.P., 2008. Purity and isotopic results from a rapid cellulose extraction method. Analytical Chemistry 80(6): 2035-2041.

Haavik, L., Stephen, F., Fierke, M., Salisbury, V., Leavitt, S.W. and Billings, S., 2008. Tree-ring δ13C and historic growth patterns as indicators of Northern red oak (Quercus rubra Fagaceae) susceptibility to red oak borer (Enapholodes rufulus (Haldeman) (Coleoptera: Cerambycidae)). Forest Ecology and Management. 255:1501–1509.

Knapp, A.K., Beier, C., Briske, D., Classen, A.T., Luo, Y., Reichstein, M., Smith, M.D., Smith, S.D., Bell, J.E., Fay, P.A., Heisler, J.L., Leavitt, S.W., Sherry, R., Smith, B., and Weng, E., 2008. Consequences of more extreme precipitation regimes for terrestrial ecosystems. BioScience 58(9): 811-821.

Leavitt, S.W., 2008. Tree-ring isotopic pooling without regard to mass: No difference from averaging δ13C values of individual trees.  Chemical Geology 252:52–55. doi:10.1016/j.chemgeo.2008.01.014

Leavitt, S.W., Chase, T.N., Rajagopalan, B., Lee, E., Lawrence, P.J., 2008. Southwestern U.S. tree-ring carbon isotope indices as a possible proxy for reconstruction of greenness of vegetation. Geophysical Research Letters. Vol. 35, L12704, doi:10.1029/2008GL033894.Robertson, I., Leavitt, S.W., Loader, N.J. and Buhay, B., 2008. Progress in isotope dendroclimatology. Chemical Geology 252: EX1-EX4 (editorial)

Panyushkina, I.P., Leavitt, S.W., Thompson, T.A., Schneider, A.F., Lange, T., 2008. Environment and paleoecology of a 12 ka mid-North American Younger Dryas forest chronicled in tree rings. Quaternary Research 70:433-441.

Robertson, I., Leavitt, S.W., Loader, N.J. and Buhay, B., 2008. Progress in isotope dendroclimatology. Chemical Geology 252: EX1-EX4 (editorial)

Tardif, J.C., Conciatori, F., Leavitt, S.W., 2008. Tree rings, δ13C and climate in Picea glauca growing near Churchill, subarctic Manitoba, Canada.  Chemical Geology 252:88-101. doi:10.1016/j.chemgeo.2008.01.015

Williams, A.P., Still, C.J., Fischer, D.T., and Leavitt, S.W., 2008. The influence of summertime fog and overcast clouds on the water relations of a coastal Californian pine: A tree-ring study.  Oecologia 156(3):601-611.




Griffin, D., Woodhouse, C.A, Leavitt, S.W., and Graham, R.C., 2014. North American Monsoon climate signal in a multi-proxy dataset from tree-ring latewood.  2014 AAG Annual Meeting, Tampa, Florida

Jull, T., Panyushkina, I., Lange, T., Chang, C.-C., Myglan, V., Kukarskih, V., Burr, G., Leavitt, S., and Swetnam, T., 2014.  Evaluating the possible size of excursions in the 14C record due to cosmic events.  9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

Csank, Z., Woodhouse, C.A., Pederson, G., Leavitt, S.W., and Danloe, J., 2014.  Proxy xool-season temperatures in the Upper-Colorado River headwaters from tree-ring δ18O.  9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

Wright, W.E., Leavitt, S.W., Woodhouse, C.A., Monson, R.K., and Szejner, P., 2014. Tree-ring isotopes applied to understanding the North American Monsoon macrosystem.  9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

*Leavitt, S.W., 2014. Stable isotopes in tree rings:  Background and applications.  Environmental Workshop, 6 January 2014, Universidad Austral de Chile, Valdivia.         

Leavitt, S.W., and Panyushkina, I.P., 2014.  Radiocarbon age control of tree-ring chronologies from a network of ancient wood sites in the U.S. Great Lakes area.  9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

Liu, T., Li, Q., Wang, Y., Song, H., Leavitt, S., Linderholm, H., Wang, R., and An, Z., 2014.  The superiority of numerical mix method in tree-ring stable-carbon isotope based May-July temperature reconstruction over Nanwutai, China for the past century.  9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

Panyushkina, I., Grachev, A., Shishov, V., Kirdynov, A., Chebykin, E., Vaganov, E., Leavitt, S., and Hughes, M., 2014.  Tree-ring evidence of wood property changes caused by modern acidification of Arctic soils. 9th International Conference on Dendrochronology (WorldDendro), 13-17 January 2014, Melbourne, Australia.

*Leavitt, S.W., 2014. Tree rings and the tales they tell of drought, floods, fires, and times gone by.  Shade Tree Short Course “Respect Your Elders” (invited) Feb 25-27, 2014, Ames, Iowa.

Leavitt, S.W. (Co-presentation with Irina Panyushkina), 2014. Ancient Environmental Change from Tree Rings: Paleoenvironment in the American Great Lakes (5-14ka BP) and in Khazakhstan (Iron Age)., 11 February 2014, Climate Change Research Center, University of New South Wales, Australia.


Griffin, D., Woodhouse, C., Meko, D., Stahle, D., Faulstich, H., Carrillo, C., Touchan, R., Castro, C., and Leavitt, S., 2013. North American monsoon precipitation reconstructed from tree-ring latewood.  2nd AmeriDendro Conference, 13-17 May 2013, Tucson, Arizona.

Leavitt, S., Woodhouse, C., Griffin, D., Touchan, R., Carrillo, C., Castro, C., and Meko, D., 2013. Monsoon rainfall from annual δ13C chronologies of Pseudotsuga menziesii and Pinus ponderosa in Southern Arizona, USA.  2nd AmeriDendro Conference, 13-17 May 2013, Tucson, Arizona.

Panyushkina, I., and Leavitt, S., 2013.  Abrupt changes of moisture variability in the Great Lakes region at ca. 13.7ka, 12ka, 11.5ka and 8.2ka:  A new perspective from subfossil tree rings. Paleoamerican Odyssey, A Conference Focused on First Americans Archaeology, 16-19 Oct 2013, Santa Fe, New Mexico.

Panyushkina, I., and Leavitt, S., 2013. Tree-ring perspectives on short-term climate variability during the transition during Late Pleistocene to Holocene from the Great Lakes network of buried timbers. 2nd AmeriDendro Conference, 13-17 May 2013, Tucson, Arizona.

Wright, W., Leavitt, S., Woodhouse, C., Monson, R., 2013.  Spatial changes in the seasonal mixing proportions of available soil moisture in the high elevations of Arizona and New Mexico.  2nd AmeriDendro Conference, 13-17 May 2013, Tucson, Arizona.


Graham, R., Woodhouse, C., Griffin, D., Meko, D., Touchan, R., Leavitt, S.W., Castro, C., 2012. Reconstruction of winter and July precipitation in the US Southwest using minimum blue intensity measurements from Pseudotsuga menziesii.  AGU Fall Meeting, 3-7 December 2012, San Francisco.

Jull., A.J.T., Panyushkina, I.P., Van de Water, P., Leavitt, S.W., Squire, J., Testa, N., Wie, A.J., Armstrong, A.L., Diaz-Gomez, C.I., Leonard, A.G., 2012.  High-resolution terrestrial MIS3 environment from trees recovered from landslide deposits in Oregon.  21st International Radiocarbon Conference, July 9-13, 2012, Paris, France.

Panyushkina, I.P., Leavitt, S.W., Schmierer, Jr., J.M., and Wiedenhoeft, A.C., 2012.  Mystery of ancient buried wood in the Arnheim “Swamp”, Upper Peninsula Michigan, USA.  21st International Radiocarbon Conference, July 9-13, 2012, Paris, France.

Leavitt, S.W., Panyushkina, I.P., Zawiskie, J.M., Wiedenhoeft, A.C., 2012.  Wood from the Shelton Mastodon Site (Michigan): Radiocarbon and tree-ring dating.  21st International Radiocarbon Conference, July 9-13, 2012, Paris, France.

Panyushkina, I.P., and Leavitt, S.W., 2012.  Progress with Ancient Great Lakes Wood: Radiocarbon and Tree-Ring Analysis. 2012 American Quaternary Association Conference, June 21-24, 2012, Duluth, Minnesota.


Panyushkina, I.P., Leavitt, S.W., 2011. Dieback patterns of ancient spruce in the Great Lakes region between ca. 14,000 and 10,000 cal yr BP.  54th International Conference on Great Lakes Research (IAGLR), Duluth, Minnesota, May 30-Jun 3, 2011.

Leavitt, S.W., Woodhouse, C.A., Touchan, R., Meko, D.M., Griffin, D., Castro, C.L., 2011. U.S. Southwest monsoon precipitation inferred from tree-ring stable-carbon isotopes.  XVIII INQUA Congress, Bern, Switzerland, 20-27 July 2011.

Panyushkina, I.P., Leavitt, S.W., James C. Knox, J.C., Hunter, R.D., Wiedenhoeft, A., 2011. LGM to Holocene transition in the Great Lakes area: Environmental inferences from floating tree-ring chronologies. XVIII INQUA Congress, Bern, Switzerland, 20-27 July 2011.

Grachev, A.M., Shishov, V.V., Leavitt, S.W., Darikova, J.A., Chebykin, E.P,, Zhuchenko N.A., Knorre, A.A., Panyushkina, I.P., Kirdyanov, A.V., Vaganov E.A., Hughes M.K., 2011. Developing tree-ring chronologies of microelement concentrations in northern Eurasia.  2nd International Asian Dendrochronological Conference (Xian, China August 20-23, 2011) [Abstract submitted but no one went to present]

Panyushkina, I.P., Van de Water, P., Jull, A.T., Leavitt, S.W., Squire, J., Testa, N.R., Wiedenhoeft, A.J., 2011. High-resolution terrestrial MIS3 environment from trees encapsulated in landslide deposits of Oregon, USA. XVIII INQUA Congress, Bern, Switzerland, 20-27 July 2011.

Panyushkina, I.P., Leavitt, S.W., 2011. Ancient boreal forest in climatic disequilibrium: Lessons from distribution and dendrochronology of subfossil wood in the U.S.A. Great Lakes area 10,000 to 14,000 14C yrs.  15th Scientific Conference of the International Boreal Forest Research Association (IBFRA), Krasnoyarsk, Russia, 15-21 August 2011.


A. A. Knorre, A. V. Kirdyanov, M. Saurer, R. T. Siegwolf, M. V. Bryukhanova, A. M. Grachev, E. P. Chebykin, E. L. Goldberg, I. P. Panyushkina, S. W. Leavitt, and E. A. Vaganov, 2010. Investigating tree-ring isotopes and trace elements in larch to determine links with climate in Southern Siberia. Poster 72 in 22nd Conference on Climate Variability and Change, American Meteorological Society Annual Meeting, Atlanta, GA, 16-21 January 2010.

Griffin, D., Castro, C.L., Ciancarelli, B., Leavitt, S.W., Meko, D.M., Touchan, R., and C.A. Woodhouse, 2010. Tree rings and North American monsoon variability in the southwestern United States. Poster at WorldDendro 2010: The 8th International Conference on Dendrochronology, Rovaniemi, Finland, June 13-18, 2010.

Williams, A.P., Allen, C.D., Millar, C.I., Swetnam, T.W., Michaelsen, J., Still, C.J., Leavitt, S.W., 2010. Forest responses to increasing aridity and warmth in the southwestern United States. 95th Ecological Society of America Annual Meeting, Pittsburgh, PA, August 1-6, 2010. [Absract COS 33-3]


*Leavitt, S.W., Panyushkina, Irina P., Schneider, Allan F., 2009. Ancient wood in the Great Lakes region: A significant paleoenvironment and paleoecology resource. North-Central Section, GSA 42nd Annual Meeting, 2-3 April 2009, Rockford, IL, GSA Abstracts with Programs Vol. 41, No. 4.

Mode, W. N., Edwards, C. J., Gertz, H. M., Hooyer, T. S., Panyushkina, I. P., Leavitt, S. W., Williams, J. W., Santiago, A., Gill, J., 2009. Paleoenvironmental record from a late glacial to early Holocene beaver pond in east-central Wisconsin. . North-Central Section, GSA 42nd Annual Meeting, 2-3 April 2009, Rockford, IL, GSA Abstracts with Programs Vol. 41, No. 4.

*Leavitt, S.W., Woodhouse, C.A., Meko, D.M., Touchan, R., 2009. Tree-ring carbon isotopes in the U.S. Southwest: Inference of moisture and monsoon. PACLIM Workshop, April 19-22, 2009, Asilomar Conference Grounds, Pacific Grove, CA.

Griffin, D., Meko, D.M., Touchan,R., Woodhouse, C.A., Leavitt, S.W., Castro, C.L., 2009.  Tree rings nd monsoon season rainfall variability in the Southwestern US: Strategies for sensitive chronology development.  AGU Fall Meeting (14-18 Dec.) Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H53E-0986.

Woodhouse, C.A., Meko, D.M.,  Touchan, R.,  Leavitt, S.W.,  Griffin, D., Castro, C.L.,  Ciancarelli, B., 2009.  North American Monsoon Variability from Instrumental and Tree-Ring Data: A Progress Report. AGU Fall Meeting (14-18 Dec.) Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H41K-02.

Van de Water, Peter K., Leavitt, Steven W., Jull, A.J.T., Squire, Joe, Testa, Nick, 2009. Tree boles revealed in Pacific Northwest landslide deposits provide tree-ring record for period prior to deglaciation.  GSA National Meeting, Portland, OR, 18-21 October 2009.

Ciancarelli, B., Castro, C., Woodhouse, C., Meko, D., Touchan, R., Leavitt, S.W., Griffin, D., 2009.  Use of tree ring and long-term precipitation records to characterize warm season climate variability in the Southwest U.S.  The Fifth Symposium on Southwest Hydrometeorology, Albuquerque, NM, Sept. 30- Oct. 1, 2009.


*Leavitt, S.W., 2008.  Current advances in tree-ring isotope dendrochronology and reconstruction of climatic conditions in recent centuries.  Geol. Assoc. Canada Annual Meeting, 26-28 May 2008. SY4:  Recent advances in isotopic reconstruction of climatic changes over the last centuries - temperature and precipitation series, Quebec City, 26 May 2008.

*Leavitt, S.W., 2008.  Environment in time and space: Opportunities from tree-ring isotope networks. Isoscapes2008, April 7 - 10, 2008, Santa Barbara, CA.