RESEARCH INTERESTS
My primary research interests are in glacial geology and paleoclimatology. I have worked for the past two decades studying glacial changes and climate variation in the Pacific Northwest, largely in coastal Alaska. This work has recently been expanded to include glacier and tree-ring records from the Russian Fareast. These projects are supported primarily by the National Science Foundation, the National Oceanographic and Amospheric Administration and the National Geographic Society and are in collaboration with Drs. Gordon C. Jacoby and Rosanne D'Arrigo of Lamont-Doherty Earth Observatory Tree Ring Lab. Most recently we have begun work on the tree-ring and glacial record in Glacier Bay National Park and Preserve. This work is in collaboration with Dr. Dan Lawson of CRREL in Hanover, New Hampshire.

In addition to the work in Alaska, we are developing a research program in the Quaternary (last 1.6 million years) geology of Ohio. We are working with archaeologists and geologists from around Ohio and at Lamont to develop tree-ring records from old growth oak forests and historical buildings, to reconstruct post-glacial histories from bogs and lakes, and to document Holocene through settlement climate and landscape changes from alluvial sediments. Much of this work and some of the Alaska projects are in collaboration with Dr. Tom Lowell of the University of Cincinnati. Below is a list of abstracts and presentations by students as well as research publications and recent reports.

RECENT RESEARCH PUBLICATIONS (Wooster students in italics)
Wiles, G.C., Barclay, D.J., Calkin, P.E., and Lowell, T.V., in press, Century to Millennial-Scale Temperature Variations for the Last Two Thousand Years Inferred from Glacial Geologic Records of Southern Alaska: Global and Planetary Change,

Lutz, B., Wiles, G.C., Lowell, T.V., and Michaels, J., 2007, The 8200 abrupt climate change in Brown’s Lake, Northeast Ohio: Quaternary Research.

Wilson, R., Wiles, G., D’Arrigo, R. and Zweck, C.. 2006, Cycles and shifts: 1300-years of multidecadal temperature variability in the Gulf of Alaska: Climate Dynamics.

Reyes, A.V., Wiles, G.C. Smith, D.J., Barclay, D.J., Allen, S., Jackson, S., Larocque, S., Laxton, S., Lewis, D. Calkin, P.E. and Clague, J.J., 2006, Expansion of alpine glaciers in Pacific North America in the first millennium AD: Geology, v. 34, p. 57-60, doi:10.1130/G21902.1.

Barclay, D.J., Gloss Barclay, J.L., Calkin, P.E. and Wiles G.C., 2006, A revised and extended Holocene history of Icy Bay, southern Alaska: Arctic, Antarctic and Alpine Research, v. 38, p. 153-162.

D'Arrigo, R.D., Wilson, R.J., Deser, C., Wiles, G., Cook, E.R., Villlalba, R., Tudhope, A., Cole, J., and Linsley, B., 2005, Tropical-North Pacific climate linkages over the past four centuries: Journal of Climate, v. 18, pp. 5253-5265, doi:10.1175/JCLI3602.1.

Driscoll, W., Wiles G.C., D'Arrigo, R.D., and Wilmking, M., 2005, Divergent tree growth response to recent climatic warming, Lake Clark National Park and Preserve, Alaska: Geophysical Research Letters, v. 32, L20703, doi:10.1029/2005GL024258.

Wiles, G.C., D'Arrigo, R.D., Villalba, R., Calkin, P.E. and Barclay, D.J., 2004, Century-scale solar variability and Alaskan temperature change over the past millennium: Geophysical Research Letters, v.31, L15203, doi:10.1029/200GL020050.

Davi, N.K., Jacoby, G.C., and Wiles, G.C., 2003, Boreal temperature variability inferred from maximum latewood density and tree-ring width data, Wrangell Mountain Region, Alaska: Quaternary Research, 60, 252-262.

Wiles, G.C., McAllister, R.P., Davi, N.K. and Jacoby, G.C., 2003, Eolian response to Little Ice Age climate change, Tana Dunes, Chugach Mountains, Alaska: Arctic, Antarctic and Alpine Research, v. 35, n.1, p. 67-73.

Barclay, D.J., Wiles, G.C. and Calkin, P.E., 2003, An 850-year record of climate and fluctuations of the tidewater-calving Nellie Juan Glacier, South central Alaska: Annals of Glaciology, v.36, p. 51-56.

Wiles, G.C., Jacoby, G.C., Davi, N.K., and McAllister, R.P., 2002, Late Holocene glacial fluctuations in the Wrangell Mountains, Alaska: Geological Society of America Bulletin, v. 114, p. 896-908.

D'Arrigo, R., R. Villalba and G. Wiles, 2001, Tree-ring estimates of Pacific decadal climate variability, Climate Dynamics, v. 18, p. 219-224.

Calkin, P.E., Wiles, G.C., and Barclay, D.J., 2001, Holocene coastal glaciation of Alaska: Quaternary Science Reviews, 20, p. 449-461.

Barclay, D.J., Calkin, P.E. and Wiles, G.C., 2001, Holocene history of Hubbard Glacier in Yakutat Bay and Russell Fjord, Southern Alaska: Geological Society of America Bulletin, v. 113, p.388-402.

Villalba, R., D'Arrigo, Cook, E.R., Jacoby, G.C. and Wiles, G.C., 2001, Decadal-scale climatic variability along the extratropical western coast of the Americas: evidence from tree-ring records: In: V. Markgraf (ed.) Interhemispheric Climate Linkages. Academic Press, p. 155-172.

RECENT PRESENTATIONS AND PUBLISHED ABSTRACTS (Wooster students in italics)
Wiles, G. C., Lyon, Eva, Lawson, D.E., and Finnegan, D., 2006, Extension of a multi-millennial tree ring serieos from southern coastal Alaska using subfossil wood from Glacier Bay National Park and Preserve: a record of subarctic climate forcing: Geological Society of America, Abstracts with Programs, 39.

Malcomb, N.L. and Wiles, G.C., 2006, Tree-ring-based mass balance stimates for Wolverine Glacier, southern Alaska, AD 1554-1987.Geological Society of America, Abstracts with Programs, 39.

Johnson, P. E., Wiles, G. C., Lowell, T.V., Santos, J., Sobral da Cunha, L., and Rochette, A., 2006, Reconstructing Little Ice Age histories for Crescent and Amherst Glaciers, College Fiord, southern Alaska: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Krawiec, A. C., Wiles, G.C., and D'Arrigo, R.D., 2006, A 267 year reconstruction of spring Lake Erie levels based on north Pacific tree-ring series: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Lehmann, S.B., Wiles,G.C., and Cook, E.R., 2006, Extending drought-sensitive oak tree-ring chronologies by dating historical structures in Northeastern Ohio: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Lutz, B., Wiles, G.C., Lowell, T.V., and Michaels, J., 2006, The 8K event in Northeast Ohio: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Wiles, G.C., Kardulias, P.K, Brush, N., Taggart, D., Rowe, R., 2006, Climate variability in North America during the first millennium AD and possible links to the middle-late Woodland transition in the Midwest: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Zavar, E., Wiles, G.C., Taggart. D., Lowell, T.V. and Michaels, J., 2006, Alluvial records of environmental change from mid to late Holocene, northeast Ohio: Geological Society of America, Abstracts with Programs, North-Central Section, 38, 25.

Wilson, R.S.J., Wiles, G.C., D'Arrigo, R.D., and Zweck, C., 2006, 1300-years of multi-decadal temperature variability in the Gulf of Alaska: Beijing International Tree Ring Meeting.

Solomina, O. and Wiles, G.C., 2006, Glaciers and climate during the last 2000 years: comparison with high- and low- resolution regional proxy records: European Geosciences Union, General Assembly 2006, Vienna Austria, 2-7 April.

Heitger, A., and Wiles, G.C., 2005, Dendroglaciological Little Ice Age History of the Land Lobe Glacier, southcentral Alaska: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 424

Krawiec, A. L., Wiles, G.C., and D'Arrigo, R.D., 2005, Potential for Midwestern hydrometeorological reconstructions using North Pacific and Midwestern tree-ring series: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 365

Lehmann, S. and Wiles, G.C., 2005, Dendroarchaeology: Tree ring dating of historical structures in Northeastern Ohio: Midwest Archaeological Conference, Dayton, OH, 2005.

Wiles, G.C., Young, N., D'Arrigo, R.D., Barclay, D.J., Calkin, P.E., and Wilson, R., 2005, Century to Millennial-Scale Temperature Variations for the Last Two Thousand Years Inferred from Alaskan Glacial Geologic Records: extended abstract for the Open Science Conference on Global Change in Mountain Regions, 2-6 October, 2005, Edinburgh, Scotland.

Zavar, E., Wiles, G.C., Kardulias, P.N., and Taggart, D., 2005, Alluvial Records of Holocene Environmental Change, Northeast Ohio: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 429.

Solomina, O., D'Arrigo, G., Jacoby, G. Wiles, Y.,Muraviev, and T. Shiraiwa, 2005, Climatic events and tendencies in the North-West Pacific recorded by trees and glaciers during he last 400 years: Paleoclimate, Environmental Sustainability and our Future, Second Open Science Meeting of PAGES, Beijing, China, 10-12 August, 2005.

D'Arrigo, R.D., Wilson, R.J., Deser, C., Wiles, G., Cook, E.R., Villlalba, R., Tudhope, A., Cole, J., and Linsley, B., 2005, Tropical-North Pacific climate linkages over the past four centuries, Abstract for 2005
Chapman Conference on Tropical-Extratropical Climatic Teleconnections, A Long-Term Perspective, 8-11 February 2005, Hawaii.

Wiles, G.C., D'Arrigo, R.D., Wilson, R. and Barclay, D.J., 2004, North Pacific climate variability for the past two millennia inferred from tree-ring and glacier proxy records: Meeting of the American Geophysical Union, San Francisco, December, 2004.

Driscoll, W. W., and Wiles, G.C., 2004, A new dendroclimatic tree ring network from Lake Clark National Park and Preserve, Alaska: Geological Society of America Abstracts and Programs, Denver, v. 37.

Wiles, G.C., Young, N.E., Barclay, D.J. and Calkin, P.E., 2004, Dating first millennium AD expansions of Alaskan coastal glaciers: Geological Society of America Abstracts and Programs, Denver, v. 37.

Glover, K., Lowell, T.V., Pair, D., and Wiles, G.C., 2004, Deglaciation and post-glacial climate change in a regional network of sites, Ohio and eastern Indiana: Geological Society of America Abstracts and Programs, Denver, v. 37.

Michaels, J.A., Zavar, E.M., Trenton, A.M., Wiles, G.C., and Lowell, T.V., 2004, Post glacial environmental history from lakes, bogs and alluvial fans, northeast Ohio: Geological Society of America Abstracts and Programs, Denver, v. 37.

Kannenberg, C. and Wiles G.C., 2004, Using tree rings as a proxy record for historic Lake Erie levels: Ohio Lake Management Society, Nineteenth Annual Symposium, Mt. Sterling, OH, 26-27 March.

Wiles, G., and D'Arrigo, R., 2004, North Pacific Climate Variability and Linkages with Lower Latitudes in North America over the Past 2000 Years: Mid-States Archaeological Society, Milwaukee, WI.

Wiles, G.C., D'Arrigo, R.D., Villalba, R., Barclay, D.J., Calkin,P.E., 2004, Alaskan temperature change over the past millennium: Solar forcing modulated by the Arctic and Pacific Decadal Oscillations: 34th International Arctic Workshop, Boulder, CO, p. 175-176.

Barclay, D. J., Barclay, J.L., Calkin, P.E., and Wiles, G.C., 2004, Tree-ring and historical evidence for a large and rapid advance of an Alaskan tidewater glacier: 34th International Arctic Workshop, Boulder, CO, p. 26-28.

Beckwith-Laube, M.J., Wiles, G.C., Calkin, P.E., and Post A., 2004, Tree-ring dated 1000-year advance of Columbia Glacier: 34th International Arctic Workshop, Boulder, CO, p.30.

Villalba, R., Boninsegna, J.A., Stahle, D., Jacoby, G.C., Luckman, B.H., D'Arrigo, R.D., Lara, A., and Wiles, G.C., 2003, Long-term variability in tropical and high-latitude circulation modes of climate in the Americas inferred from tree-rings: Geological Society of America Program with Abstracts, Seattle, v. 36.

Wiles, G.C. Brady, K.L., and Calkin, P.E., 2003, High-latitude terrestrial proxies of increased precipitation in western North America during the Medieval Climate Anomaly: Connections with low latitude moisture records: Geological Society of America Abstracts and Programs, Seattle, v. 36.

Beckwith-Laube, M, Kennedy, M., Wiles, G.C., Calkin, P.E., and Lowell, T.V., 2003, Late Holocene glacial stratigraphy of Columbia Bay Alaska: extending the record: Geological Society of America Abstracts and Programs, Seattle. v. 36.

Szabo, J.P., Lowell, T.V., Pair, D. and Wiles, G.C., 2003, Pleistocene glaciation of Ohio, USA: current studies on the stratigraphy of glacial deposits and rates of retreat of Wisconsinan ice: XVI INQUA Congress, Flagstaff, Arizona.

Glover, K., Lowell, T.V., Pair, D., and Wiles, G.C., 2003, Tracking climate change throughout the last termination: a network of paleobasins dating to c.15-16 ka years BP: XVI INQUA Congress, Flagstaff, Arizona.

Brady, K.L., Wiles, G.C., and D'Arrigo, R.D., 2003, Evidence for a Medieval warm period, Columbia Bay, Alaska: Geological Society of America Cordilleran Section, Abstracts and Programs, Puerta Vallarta, Mexico, v. 35.

Bowers, A.L., and Wiles G.C., 2003, Bridging the gap between science and society: brine spreading in Wooster, Wayne County, Northeast Ohio, USA: Geological Society of America, Abstracts and Programs Northeast Section, Halifax, Nova Scotia, v. 35.

Lowell, T.V., Pair D., and Wiles, G.C., 2003, Preliminary radiocarbon retreat chronology of the Erie Lobe: it might mean this: Geological Society of America Northcentral Section, Kansas City, MO, v. 35.

Wiles, G.C., Brady, K.L., Lucas, S.M., Kennedy, M.G., and Calkin, P.E., 2002, Medieval warm period advances of Alaskan iceberg-calving glaciers: Geological Society of America National Meeting, November 2002, Denver, CO, v. 34, n. 6.

BOOK CHAPTERS
Villalba, R. Luckman, B.H., Boninsegna, J.1, D'Arrigo, R.D., Lara, A., Villanueva-Diaz, J. , Masiokas, M.1,, Argollo, J., Soliz, C., LeQuesne, C., Stahle, D., Roig, F., Aravena, J.C.,, Wiles, G., Hartsough, P., in press, 2006, Dendroclimatology from regional to continental scales: Understanding regional processes to reconstruct large-scale climatic variations across the Western Americas: in M. Hughes, T. Swetnam and H. Diaz, Dendroclimatology: Progress and prospects, Springer.

RECENT REPORTSrts
Wiles, G.C., 2006, Radiocarbon dating of the Shreve Road 6000 year old buried forest, Shreve, Ohio, report submitted to Paul Eikleberry, Shreve Ohio.

Wiles, G.C., 2005, The Sassafrass Knoll tree-ring site, Wooster, Ohio: report submitted to Paul Locher, Wooster, Ohio.

Wiles, G.C. and Lehmann, S., 2005, Tree ring dating of the Geiser House, Orrville, Ohio. Report submitted to Shawn Godwin, Historical Architect, Cleveland, Ohio.

Wiles, G.C. and Lehmann, S., 2005, Tree ring dating of the Beall House, Wayne County Historical Society, Wooster, Ohio, Report submitted to Shawn Godwin, Historical Architect, Cleveland, Ohio.

Pair, D., Wiles, G., and Lowell, T., 2003, Keck Ohio 2002: The last glacial transition in Ohio recorded in lakes and bogs: in Proceedings of the 2003 Keck Geology Symposium, Beloit WI, ed. B.A. Palmer.

Wiles, G.C., Lowell, T.V., and Pair, D., 2002, Glacial Ohio 2001: the last glacial transition recorded in lakes and bogs, southwestern Ohio: in Proceedings of the 15th Annual Undergraduate Research Symposium, Amherst, MA, ed. B.A. Palmer.

Wiles, G.C., Landa, E.R. and Savina, M.E., 2002, Soils and the Undergraduate Curriculum (Wooster, OH 26-30 September 2001): in Proceedings of the 15th Annual Undergraduate Research Symposium, Amherst, MA, ed. B.A. Palmer.

Wiles, G. C. and Rusell Kohrs, 2001, Updating and extending the Johnson Woods ring-width, tree-ring chronology, Johnson Woods Preserve, Orrville Ohio: Research Report - Submitted to the Ohio Chief of the Division of Natural Areas and Preserves for work performed under State Nature Preserve Research Permit #RP-207.

Howe, G.T, and Wiles, G.C., 2001, The story in the rings: Ohio Woodland Journal, v.8, p. 16-18.

GRANTS (last 5 years)
NSF – ATM-0202898 - coPI, Development and Analysis of Climatically-Sensitive Tree-Ring Chronologies from Data Sparse Sites along the North Pacific Rim (with R.D. D'Arrigo and Brendan Buckley, Columbia University), Support for 5 Wooster students for travel to Far East Asia and Alaska, 7/1/02- 6/31/06.

National Geographic Research Grant - A Thousand Year Glacial and Temperature History from College Fiord, Southern Alaska, with Lucio Cunha (University of Coimbra, Portugal) and Joao Santos (Oklahoma State University). Collaborative project funded by the Global Exploration Fund, NGS, 2004-05.

The Henry Luce Foundation – Participant, Funds to initiate The Environmental Analysis and Action Program at The College of Wooster, an interdisciplinary program built around student faculty research and policy implications of this work, 1/1/05-12/31/07.

Luce Fund for Distinguished Scholarship – Climate Change and Geomorphic History of Northeast Ohio, funds for the study of alluviation and its relation to recent climate change, 11/18/03-8/31/05.

Keck Geology Consortium Grant, - The Glacial/Interglacial Transition: The Record from Ohio’s Lakes and Bogs: with Donald Pair (University of Dayton) and Thomas V. Lowell (University of Cincinnati), Summer 2002. Support for nine students to travel to Alberta, Canada to study modern glacial environments and to core bogs and lakes in southwestern Ohio, summer 2002. ($65,000).

NSF - ATM99-10805 PI, Tree-Ring Based Records of Temperature and Glacial Fluctuation Spanning the Past Two Millennia, Prince William Sound, Alaska (collaborative project with P.E. Calkin, University of Colorado), The College of Wooster Participation 5/1/00-4/31/02.

NOAA- NA86GP0435 coPI, Development and Analysis of Climatically-Sensitive Tree-Ring Chronologies from Data Sparse Sites along the North Pacific Rim (with G.C. Jacoby and R.D. D'Arrigo) 7/1/98 - 6/30/01.

Keck Geology Consortium Grant, Surficial Geologic Mapping and Late Wisconsin Glacial Stratigraphy of Southwest Ohio, with Donald Pair (University of Dayton) and Thomas V. Lowell (University of Cincinnati), Summer 2001. Support for eight students to travel to British Columbia, Canada to study modern glacial environments and to investigate the glacial stratigraphy of southwestern Ohio.

SELECTED ACTIVITIES (last five years)
Presentation to the Miniconference on the Holocene History of the Northern Treeline, Lamont Doherty Earth Observatory, 26-27 June 2006.
Contributing author to Chapter 6 (Paleoclimate) of the Working Group I, IPCC Fourth Assessment Report, 2006.
Co-organized session on Climatic Inferences of Glacier Fluctuations (with O.Solomina, RU) - Open Science Conference: Global Change in Mountain Regions, Perth, Scotland, October 2005. Guest Editor with O. Solomina, C. Kull and W. Haberli of special issue of Global and Planetary Change, October 2005.
Presentation to the American Geophysical Union on North Pacific Climate Variability, San Francisco, December 2004.
Medieval Drought in the American West, Invited presentation to Comer Fellowship aboard the Turmoil, Piermont, NY, 17 October 2004
Keynote presentation on Solar forcing of Alaskan mountain glaciation over the past millennium, American Quaternary Association, Environmental Change and Human Migrations in the North Pacific Basin, Anchorage, August 2002.