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.

RESEARCH EXPERIENCE
Columbia University, Lamont-Doherty Earth Observatory, Adjunct Associate Research Scientist 1996-present, Associate Research Scientist 1995-1996
Byrd Polar Research Center, The Ohio State University, Adjunct Research Associate 2006-present
Lamont-Doherty Post-Doctoral Fellowship 1993-1995

SELECTEDACTIVITIES
Contributing author to Chapter 6 (Paleoclimate) of the Working Group I, IPCC Fourth Assessment Report, 2007.
Supervised and coadvised 32 undergraduate theses primarily in Alaska (24) and Ohio.
Member of the U.S. National Academies of Science – U.S. National Committee for the International Union for Quaternary Research (2008 to present).
Associate Editor, Tree Ring Research (2002-present)
Manager of the COWO (The College of Wooster) Seismic Station – a seismic station part of Ohioseis and located in Scovel Hall in the Geology Department (http://140.103.104.56/).
Director and founder of the Wooster GIS Lab and Wooster Tree Ring Lab (http://www.wooster.edu/treering/).

RECENT RESEARCH PUBLICATIONS (Wooster students in italics)
Wiles, G.C., Krawiec, A.C., and D’Arrigo, R.D., 2009 in press, A 265-Year Reconstruction of Lake Erie Water Levels Based on North Pacific Tree Rings: Geophysical Research Letters, doi: 2008gl037164.

Barclay, D.J., Wiles, G.C. and Calkin, P.E., 2009 in press, Holocene glacier fluctuations in Alaska: Quaternary Sciences Review.

Barclay, D.J., Wiles, G.C. and Calkin, P.E., 2009, Tree-ring cross-dates for a first millennium AD advance of Tebenkof Glacier, southern, Alaska: Quaternary Research, 71: 22-26, doi:10.1016/j.yqres.2008.09.005.

Wiles, G.C., Barclay, D.J., Calkin, P.E., and Lowell, T.V., 2008, Century to Millennial-Scale Temperature Variations for the Last Two Thousand Years Inferred from Glacial Geologic Records of Southern Alaska: Global and Planetary Change, 57, doi:10.1016/j.gloplacha.2006.07.036.

Solomina, O., Haeberli, W., Kull, C. and Wiles, G., 2008, Historical and Holocene Glacier-climate variations: general concepts and overview: Global and Planetary Change, 57, doi:10.1016/j.gloplacha.2007.02.001.

Barclay, D.J., Wiles, G.C. and Calkin, P.E., in press, 2008, Tree-ring cross-dates for a fist millennium AD advance of Tebenkof Glacier, southern, Alaska: Quaternary Research.

Barber, V.A., Juday, G.P., Osterkamp, T., D'Arrigo, R., Berg, E., Buckley, B., Hinzman, L, Huntington, H., Jorgensen, T., McGuire, D., Riordan, B., Whiting, B., Wiles, G. Wilmking, M., 2008, Synthesis of Recent Climate Warming Effects on Terrestrial Ecosystems of Alaska: in Climate Warming in Western North America/Evidence and Environmental Effects, Ed. Frederic H. Wagner, University of Utah Press.

Moore, T., Malcomb, N. and Wiles, G.C., 2007, Climate response of Dahurian Larch in Secrest Arboretum, Wooster,Ohio, USA: Tree Ring Research.

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.. 2007, Cycles and shifts: 1300-years of multidecadal temperature variability in the Gulf of Alaska: Climate Dynamics, 28: 425-440, DOI 10.1007/s00382-006-0194-9.

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.

Solomina, O., Wiles, G.C., Shiraiwa, T., and D’Arrigo, R., 2006, Multiproxy records of climate variability for Kamchatka for the past 400 years: Climate of the Past, 2, 1051-1073, SRef-ID: 1814-9359/cpd/2006-2-1051

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.

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.

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.

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

RECENT PRESENTATIONS AND PUBLISHED ABSTRACTS (last 3 years - Wooster students in italics)
Capps, D., Wiles, G. and Clague, J., 2009, Dendrochronology to the Beat of a Different Drummer: Lakes Dammed by a Tidewater Glacier Out of Phase with Climate: EGU, Geophysical Research Abstracts, v. 11, EGU2009-0.

Laxton, S., Lawson, D., Wiles, G., and Lowell, T., 2008, Reconstructing mid- Holocene glacial fluctuations in Glacier Bay, Alaska: AGU, Fall Meet. Suppl., Abstract.

Brush, N., Wiles, G. and Kardulias, P., 2008, The Impact of Millennial-Scale, Rapid Climate Change Events on the Expansion and Contraction of Prehistoric Cultures in Eastern North America During the Late Holocene: AGU, Fall Meet. Suppl., Abstract.

Wiles, G.C., Lawson, D. E., Barclay, D. J., Lowell, T.V., 2008, Alaskan Tidewater Glacier Response to Climate Change during the Medieval Climate Anomaly: Geological Society of America Abstracts with Programs, Vol. 44.

Fetters, C., Wiles, G.C., Lawson, D. E. , Krivicich, M. and Koch, J., 2008, Tlingit Legends and Tree Ring Dated Little Ice Age Maximum in Glacier Bay during the Early 18th Century: Geological Society of America Abstracts with Programs, Vol. 44.

Laxton, S.C., Wiles, G.C, 2008, Spatial distribution of mountain hemlock divergence in the Gulf of Alaska: Abstract, First American Dendrochronology Conference, Vancouver, British Columbia.

Wiles, G.C. and Plourde, A., 2008, Modeling Laurentian Great Lake levels over the last several hundred years using North Pacific Tree Rings Geological Society of America Abstracts with Programs, Vol. 43.

Barclay, D.J., Wiles, G.C. and Calkin, P.E., 2008, Holocene glaciation of Alaska: 20 years on: Geological Society of America Abstracts with Programs, Vol. 43.

Solomina, O. and Wiles, G.C., 2008, Glacier variations during the last 2000 years in the high latitudes of the Northern Hemisphere: Comparison with other climate proxies: 38th International Annual Arctic Workshop 2008, Boulder Colorado.

Laxton, S.C., Wiles, G.C., Trutko, A., Lowell, T.V. and Lawson, D.E., 2008, Divergent tree growth along the North East Pacific Rim: Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract :  PP54A-03.

Lowell, T.V., and Wiles, G.C., 2008, Toward an understanding of why tidewater glaciers advance when its warm – its the dirt: Geological Society of America Abstracts with Programs, Vol. 40.

Trutko, A.A., Erlanger, E.D., Plourde, A.J., Wiles, G.C., and Lawson, D.L., 2007, A new dendroclimatic network of temperature –sensitive, tree-ring series from Glacier Bay National Park and Preserve, Alaska: Geological Society of America Abstracts with Programs, Vol. 39, No. 6, p. 302

Wiles, G.C., Barclay, D.J. and Malcomb, N., 2007, Glacier Changes and Inferred Temperature Variability in Alaska for the Past Two Thousand Years: Eos Trans. AGU,
88(52), Fall Meet. Suppl., Abstract  PP44A-03.

Wiles, G.C. and Plourde, A.J., 2008, Modeling Laurentian Great Lake levels over the last several hundred years using North Pacific tree rings: Geological Society of America Abstracts with Programs, Vol. 39, No. 6, p. 302

Kardulias, P.K, and Wiles, G.C., 2007, Mid to late Woodland transition and possible lins to climate change: American Anthropological Association National Meeting, Washington D.C.

Barclay, D., J., Wiles, G.C., and Calkin, P.E., 2008, A two millennia-long tree-ring-dated record of terminus fluctuations, Sheridan Glacier, southern Alaska: International Quaternary Association, Cairns, Australia.

Wiles, G.C., Barclay, D.J., and Calkin, P.E., 2007, Glacier Changes and Inferred Temperature Variability in Alaska for the Past Two Thousand Years: Eos Transactions of the American Geophysical Union.

Trutko, A. Erlanger, E., Plourde, A., Wiles, G., and Lawson, D., 2007, A new dendroclimatic network of temperature-sensitive tree-ring series from Glacier Bay National Park and Preserve, Alaska: Geological Society of America Abstracts with Programs.

Lehmann, S., Belding, E., Wiles, G. and Brush, N.,2007,  Development and climatic analysis of a 465 year tree ring chronology from northeast Ohio, USA: Geological Society of America Abstracts with Programs, v. 39, p. 637.

Laxton, S., Trutko, A. and Wiles, G., 2007, Divergent tree growth along the North East Pacific Rim: Eos Transactions of the American Geophysical Union.

Reyes, A., Smith, D., and Wiles, G., 2007, Regional expansion of alpine glaciers in northwestern North America in the first millennium AD: Arctic Workshop, Iceland, April 2007.

Barclay, D., Wiles, G., and Calkin, P., 2007, A two millennia-long tree-ring-dated record of terminus fluctuations, Sheridan Glacier, southern Alaska: XVII INQUA Congress 2007, Australia
28 July - 3 August 2007.

Wiles G. C., Lyon, E., and Lawson, D.E. and Finnegan, D., 2006, Extension of a multi-millennial tree-ring series 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, v. 39.

Malcomb, N.L. and Wiles, G.C., 2006, Tree-ring-based mass balance estimates for Wolverine Glacier, Southern Alaska, A.D. 1554-1987: Geological Society of America, Abstracts with Programs, v. 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, EGU06-A-05815.

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.

GRANTS (last 5 years)
Keck Geology Consortium - The Geomorphology and Dating of Holocene high-water levels on the Kenai Peninsula, Alaska (summer 2009) with Alaska Fish and Wildlife Service and the Alaska State Geological Survey.

Center for Creativity and Innovation (The College of Wooster) – Tree-Ring Dating of Historical Structures in Ohio, Summer 2008.

National Geographic Research Grant - Development and analysis of millennia-long tree-ring records from Glacier Bay National Park and Preserve, Alaska (GRANT #8246-07).

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.

SELECTED ACTIVITIES (last five years)
Invited talks 2007-08 - Case Western, Geology 14 September 2007; University of Northern Illinois, Geology 28 September 2007; Kent State University. Geology, 9 November 2007; The Wilderness Center, Wilmot Ohio, 19 January, 2008; University of Toledo, Geology, 12 March 2008; Ohio University, Department of Geological Sciences, 25 April 2008; Religious Academy, The College of Wooster 24 January 2008.
Miniconference on the Holocene History of the Northern Treeline, Lamont Doherty Earth Observatory, 26-27 June 2006.
Co-organized session on Climatic Inferences of Glacier Fluctuations (with O.Solomina, Russia) – 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.
Invited 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.