Glenn Juday

Professor Emeritus of Forest Ecology


Contact information:
Phone: 907-474-6717
Fax: 907-474-7439
Location: 161 Arctic Health Research Building

Curriculum vitae:
B. S., 1972, Purdue University
Ph.D., 1976, Oregon State University

NRM/GEOG 464 - Wilderness Management
NRM/BIO 277 - Introduction to Conservation Biology
NRM 397/697 - Tree-ring Analysis

Research interests: 
Tree-ring studies, Climate change assessment, Biodiversity under forest management systems, Climate change and forest growth, Sustainable boreal forest production, Forest disturbance from insect outbreaks, Forest regeneration under management, Long-term environmental monitoring, Old-growth forest ecology, Natural controls of biodiversity, Wilderness and natural area management, Forest development and ecosystem life history.

Examples of research support:

Olnes, J., Kielland, K., Juday, G. P., Mann, D. H., Genet, H. and Ruess, R. W. 2017. Can snowshoe hares control treeline expansions?. Ecology 98(10): 2506-2512. doi:10.1002/ecy.1968.

Wilmking, M.; Burasa, A.; Eusemann, P.: Schnittler, M.; Trouillier, M.; Wurth, D.; Langea, J.; van der Maaten-Theunissen, M.; Juday, G.P. 2017. High frequency growth variability of white spruce clones does not differ from non-clonal trees at Alaskan treelines. Dendrochronologia 44: 187–192.

Allaby, A.; Juday, G.P.; Young, B. 2017. Early white spruce regeneration treatments increase birch and reduce aspen after 28 years: Toward an integrated management of boreal post-fire salvaged stands. Forest Ecology and Management 403: 79–95. 

Morimoto. M; Juday, G.P.; Young, B. 2017. Clearcutting and site preparation, but not planting, promoted early tree regeneration in boreal Alaska. Forests, 8 (1): 21pp.  doi:10.3390/f8010012

Anderson, C.; Juday, G.P. 2016. Mycoremediation of Petroleum: A Literature Review. Journal of Environmental Science and Engineering A 5: 397-405. doi:10.17265/2162-5298/2016.08.002 

Morimoto, M.; Juday, G.P.; Young, B.D. 2016. Early tree regeneration is consistent with sustained yield in low input boreal forest management in Alaska. Forest Ecology and Management 373:116-127.

Juday, G.P., Alix, C., Grant, T. 2015. Spatial coherence and change of opposite white spruce temperature sensitivities on floodplains in Alaska confirms early-stage boreal biome shift. Forest Ecology and Management 350: 46-61.

Principal Investigator. 11/30/2014 to 6/30/2016. “ Boreal Alaska - Learning, Adaptation, Production: Phase 2 (BAK LAP2) .” Alaska DNR. $150,000.

Principal Investigator. 06/01/2012 to 3/31/2015. “ Boreal Alaska - Learning, Adaptation, Production (BAK LAP) .” Alaska DNR. $1,000,000.

Senior Investigator; R. Reuss and 25 others. 10/01/2010 to 9/30/2016. “ Regional consequences of changing climate-disturbance interactions for the resilience of Alaska’s boreal forest .” NSF. $5,640,000.

Principal Investigator. 09/01/2009 to 3/31/2011. “ Yukon Flats Studies of the Yukon Basin Project: Black spruce climate sensitivity and forest Health assessment in the Yukon Flats/Beaver Creek lowlands .” USGS. $58,163.

Principal Investigator. 10/01/2008 to 3/31/2010. “ Documenting And Understanding Effects Of Increased Temperatures On Alaska Boreal Forest: Early Implementation Studies Of The Yukon Basin Project .” USGS. $48,080.

Senior Investigator; F.S. Chapin and 23 others. 10/01/2006 to 9/30/2010. “ The Dynamics of Change in Alaska’s Boreal Forests: Resilience and Vulnerability in Response to Climate Warming; Bonanza Creek LTER .” NSF. $3,729,326.

Senior Investigator; F.S. Chapin and 23 others. 10/01/2004 to 9/30/2006. “Alaska's changing boreal forest: Resilience and vulnerability: Bonanza Creek LTER.” NSF. $1,748,336.

Principal Investigator. “The Potential of Lodepolge Pine as a New Crop Tree in Alaska.” USDA. $53,672. 2001-2003

Co-Principal Investigator (one of 4; Dr. Roseann D-Arrigo, Principal Investigator) “Response of Pacific Northwest and Alaskan Forests to Recent Multiple Environmental Changes” (3-year term, 06/2002 to 06/2005; totaling $ 142,897. Source: U.S. Department of Energy, subcontract through Columbia University)

Co-Principal Investigator (one of 6; Dr. Terry Chapin, Principal Investigator) in project “Regional resilience and adaptation: Planning for change. Inegrative Graduate Research, Education, and Training (IGERT) Program National Science Foundation.” (4-year term, 09/2001 to 09/2005; totaling $ $2,620,100. Source: National Science Foundation)

Co-Principal Investigator 06/2000 to 10/2004; F.S. Chapin & 23 others; “Interaction of multiple disturbances with climate in the boreal forest: Bonanza Creek LTER.” National Science Foundation. $2,800,000

Co-Principal Investigator 10/01/2002 to 9/30/2003; G. Weller; “ACIA – Arctic Climatic Impact Assessment.” National Science Foundation and International Arctic Research Center. $19,500.

10/1998 to 10/1999. “AFES 98-24. Dendrochronological studies of National parks in Alaska.” U.S. Geological Survey, Biological Research Division. $33,719.

05/1998 to 05/2000. Principal Investigator (with F.S. Chapin III PI, and 28 others). “AFES 98-36. Interaction of multiple disturbances with climate in Alaskan boreal forests.” National Science Foundation. $1,400,000.

Examples of publications:

Juday, Glenn P. 2013. Monitoring Hectare-Scale Forest Reference Stands At Bonanza Creek Experimental Forest LTER. Pp 31-48 In: Camp, A.E.; Irland, L.C.; Carroll, C.J.W. (eds.) Long-term Silvicultural & Ecological Studies: Results for Science and Management, Volume 2. Global Institute for Sustainable Forestry Research Paper 013, Yale University School of Forestry and Environmental Studies. 187 p.

Juday, Glenn P.; Densmore, Roseann V.; Zasada, John C. 2013. White Spruce Regeneration Silviculture Techniques 25 years after Wildfire: the Rosie Creek Fire Tree Regeneration Installation. Pp 49-65 In: Camp, A.E.; Irland, L.C.; Carroll, C.J.W. (eds.) Long-term Silvicultural & Ecological Studies: Results for Science and Management, Volume 2. Global Institute for Sustainable Forestry Research Paper 013, Yale University School of Forestry and Environmental Studies. 187 p.

Wilmking, M.; Hallinger, M.; van Bogaert, R.; Kyncl, T.; Babst, F.; Hahne, W.; Juday G.P.; de Luis, M.; Novak, K.; Völlm, C. 2012. Continuously missing outer rings in woody plants at their distributional margins. Dendrochronologia 54 p. doi: 10.1016/j.dendro.2011.10.001

Juday, G.P. and C. Alix. 2012. Consistent negative temperature sensitivity and positive influence of precipitation on growth of floodplain Picea glauca in Interior Alaska . Canadian Journal of Forest Research 42:561-573.

Juday, G.P. 2011. The Biome Shift Now Occurring in the Boreal Region: Characteristics and a First Look at Knowledge Needs. Pp 62-63 IN: Frontiers in Understanding Climate Change and Polar Ecosystems: Summary of a Workshop , Committee for the Workshop on Frontiers in Understanding Climate Change and Polar Ecosystems. National Research Council. 86 pp. ISBN: 0-309-21088-7. (

Callaghan, T.V.; Johansson, M.; Brown, R.D.; Groisman, P.Y.; Labba, N.; Radionov, V.; Bradley, R.S.; Blangy, S.; Bulygina, O.N.; Christensen, T.R.; Colman, J.; Essery, R.L.H.; Forbes, B.C.; Forchhammer, M.C.; Golubev, V.N.; Honrath, R.E.; Juday, G.P.; Meshcherskaya, A.V.; Phoenix, G.K.; Pomeroy, J.; Rautio, A.; Robinson, D.A.; Schmidt, N.M.; Serreze, M.C.; Shevchenko, V.; Shiklomanov, A.I.; Shmakin, A.B.; Sköld, P.; Sturm, M.; Woo, M.; Wood, E.F. 2011. Multiple effects of changes in Arctic snow cover. Ambio 40: 32-45. Doi: 10.1007/s13280-011-0213-x.

Callaghan, T.V.; Johansson, M. (Convening lead authors), Brown, R.D.; Groisman, P.A.; Labba, N.; Radionov, V. (Lead authors), Barry, R.G.; Bradley, R.S.; Blangy, S.; Bulygina, O.N.; Christensen, T.R.; Colman, J.; Essery, R.L.H.; Forbes, B.C.; Forchhammer, M.C.; Frolov, D.M.; Golubev, V.N.; Grenfell, T.C.; Honrath, R.E.; Juday, G.P.; Rae Melloh, R.; Meshcherskaya, A.V.; Petrushina, M.N.; Phoenix, G.K.; Rautio, A.; Razuvaev, V.N.;  Robinson, D.A.; Rodionov, V.; Romanov, P.; Schmidt, N.M.; Serreze, M.C.; Shevchenko, V.; Shiklomanov, A.I.; Shindell, D.; Shmakin, A.B.; Sköld, P.; Sokratov, S.A.; Sturm, M.; Warren, S.; Woo, M.; Wood, E.F.; Yang, D. (Contributing authors). 2011. Changing Snow Cover and Its Impacts, Chapter 4, Pp 4-1 through 4-59. In: Snow, Water, Ice, and Permafrost (SWIPA). Oslo: Arctic Monitoring and Assessment Programme (AMAP). Oslo, Norway, xii + 538 pp. ISBN – 978-82-7971-071-4.

Beck, P.S.A.; Juday, G.P.; Alix, C.M.; Barber, V.A.; Winslow, S.E.; Sousa, E.E.; Heiser, P.; Herriges, J.D.; Goetz, S.J.. 2011. Changes in forest productivity across Alaska consistent with biome shift. Ecology Letters 14: 373–379 . doi: 10.1111/j.1461-0248.2011.01598.x

Burton, P.J., Y. Bergeron, B.E.C. Bogdanski, G.P. Juday, T. Kuuluvainen, B.J. McAfee, A. Ogden, V.K. Teplyakov, R.I. Alfaro, D.A. Francis, S. Gauthier, and J. Hantula. 2010. Sustainability of boreal forests and forestry in a changing environment. Pages 249 to 282 in G. Mery, P. Katila, G. Galloway, R.I. Alfaro, M. Kanninen, M. Lobovikov and J. Varjo, editors.  Forests and Society - Responding to Global Drivers of Change. International Union of Forest Research Organizations (IUFRO), Vienna, Austria.

McGuire, D.; Ruess, R.; Lloyd, A.H.; Yarie, J.; Clein, J. S.: Juday, G.P. 2010. Vulnerability of White Spruce Tree Growth in Interior Alaska in Response to Climate Variability: Dendrochronological, Demographic, and Experimental Perspectives. Canadian Journal of Forest Research. 40: 1197–1209. doi:10.1139/X09-206  

Juday, Glenn Patrick. 2009. Boreal Forests and Climate Change. Pp. 75-84, In: Oxford Companion to Global Change. Oxford University Press. 684 pp. ISBN: 978-0-19-532488-4.

Beier, C.M., Sink, S.E., Hennon, P.E., D’Amore, D.V., and Juday, G.P. 2008. Twentieth-century warming and the dendroclimatology of declining yellow-cedar forests in southeastern Alaska. Canadian Journal of Forest Research. 38 (6): 1319-1334. 

Hennon, P.; D’Amore, D.; Wittwer, D.; Johnson, A.; Schaberg, P.; Hawley, G.; Beier, C.; Sink. S.; Juday. G. 2006. Climate Warming. Reduced snow, and freezing injury could explain the demise of yellow-cedar in southeast Alaska, USA. World Resource Review 18: 427-445.

Wilmking M., Juday G.P., Barber V., Terwilliger M. 2006. Modeling spatial variability of white spruce (Picea glauca) growth responses to climate change at and below treeline in Alaska - A case study from two National Parks. Erdkunde 60 (2):113-126.

Chapin, F.S. III,; McGuire, A.D.; Ruess, R.W.; Walker, M.W.; Boone, R.; Edwards, M.; Finney, B.; Hinzman, L.D.; Jones, J.B.; Juday, G.P.; Kasischke, E.S.; Kielland, K.; Lloyd, A.H.; Oswood, M.W.; Ping, C.-L.; Rexstad, E.; Romanovsky, V.; Schimel, J.; Sparrow, E.; Sveinbjornsson, B.; Valentine, D.W. ; Van Cleve, K.; Verbyla, D.L.; Viereck, L.A.; Werner, R.A.; Wurtz, T.L.; Yarie, J. 2006. Summary and synthesis: Past and future changes in the Alaskan boreal forest. Pp. 332-338. In: Alaska's Changing Boreal Forest. Chapin, F.S. III, M.W. Oswood, K. van Cleve, L.A. Viereck, and D.L. Verbyla (Eds.) Oxford University Press. 368 p.

Eamer, J. Finnmore-Rogan, M. (lead Authors), and Ahlenius, H., Copland, L., Crump, J., Haney, L.E., Hemmings, A.D., Johnsen, K.I., Juday, G., Lambrechts, C., Nelleman, C., Osmond-Jones, E., Zockler, C. 2006. Polar Regions; Pp. 35-38 in: GEO Yearbook 2006 An Overview of Our Changing Environment. United Nations Environment Programme, Nairobi, Kenya. ISBN 92-807-2668-4. 82 pp.

Juday, G.P. (Lead Author), Barber, V.; Vaganov, E.; Rupp, S.; Sparrow, S.; Yarie, J.; Linderholm, H. (Contributing Authors), Berg, E.; D’Arrigo, R.; Duffy, P.; Eggertsson, O.; Furyaev V.V.; Hogg, E.H.; Huttunen, S. ; Jacoby, G.; Kaplunov, V.Ya. ; Kellomaki, S.; Kirdyanov, A.V.; Lewis, C.E.; Linder, S.; Naurzbaev, M.M.; Pleshikov, F.I.; Runesson, U.T.; Savva, Yu.V.; Sidorova, O.V.; Stakanov, V.D.; Tchebakova N.M.; Valendik E.N.; Vedrova, E.F., Wilmking, M. (Consulting Authors). 2005. Forests, Land Management, Agriculture, Chapter 14 Pp 781-862, In: Arctic Climate Impact Assessment. Arctic Council. Cambridge University Press. ISBN 978-0-521-86509-8.

Usher, M.B. (Lead Author), Callaghan, T.V.; Gilchrist, G.; Heal, O.W.; Juday, G.P.; Loeng, H.; Muir, M.A.K.; Prestrud, P. (Contributing Authors). 2005. Principles of Conserving the Arctic’s Biodiversity. Chapter 10 Pp 551-608, In: Arctic Climate Impact Assessment. Arctic Council. Cambridge University Press. 1024 p. ISBN 978-0-521-86509-8.

Wilmking, M., R. D'Arrigo, G. C. Jacoby, and G. P. Juday. 2005. Increased temperature sensitivity and divergent growth trends in circumpolar boreal forests. Geophysical Research Letters 32(15): L15715. doi:10.1029/2005GL023331.

Wilmking, M., and G. P. Juday. 2005. Longitudinal variation of radial growth at Alaska’s northern treeline – recent changes and possible scenarios for the 21st century, Global and Planetary Change 47: 282-300. doi:10.1016/j.gloplacha.2004.10.017.

Hassol, S.J. (plus numerous Contributors and Lead Authors of the Full Science Report). 2004. ACIA, Impacts of a Warming Arctic. Arctic Climate Impact Assessment. Cambridge University Press. 139 p.

Chapin, F.S.; Peterson, G.; Berkes, F.; Callaghan, T.V.; Anglestam, P.; Apps, M.; Beier, C.; Bergeron, Y,; Crepin, A.-S. ; Elmqvist, T.; Folke, C.; Forbes, B.; Fresco, N.; Juday, G.; Niemela, J.; Shvidenko, A.; Whitemna, G. 2004. Resilience and vulnerability of northern regions to social and environmental change. Ambio 33(6): 344-349.

Chapin. F.S. 3rd; Callaghan, T.V.; Bergeron, Y.; Fukuda, M.; Johnstone, J.F.; Juday, G.; Zimov, S.A. 2004. Global change and the boreal forest: thresholds, shifting states or gradual change? Ambio 33(6): 361-365.

Wilmking, M., Juday, G.P., Barber, V., and Zald, H. 2004. Recent climate warming forces contrasting growth responses of white spruce at treeline in Alaska through temperature thresholds. Global Change Biology 10 (10): 1724-1736.

Barber, V.A., G.P. Juday and B.P. Finney. 2004. Reconstruction of Summer Temperatures in Interior Alaska: Evidence for Changing Synoptic Climate Regimes. Climatic Change 63 (1-2): 91-120.

Barber, V.A., G.P. Juday and B.P. Finney. 2004. Reconstruction of Summer Temperatures in Interior Alaska: Evidence for Changing Synoptic Climate Regimes. Climatic Change 63 (1-2).

Juday, G.P., Barber, V., Rupp S., Zasada, J., Wilmking M.W. 2003. A 200-year perspective of climate variability and the response of white spruce in Interior Alaska. Chapter 12 Pp. 226-250. In: Greenland, D., Goodin, D., and Smith, R. (editors). Climate Variability and Ecosystem Response at Long-Term Ecological Research (LTER) Sites. Oxford University Press.

Ott, R.A., and G.P Juday. 2002. Canopy gap characteristics and their implications for management in the temperate rainforests of southeast Alaska. Forest Ecology and Management. 159(3): 271-291.

Rees, Daniel C., Juday, G.P. 2002. Plant species diversity and forest structure on logged and burned sites in central Alaska. Forest Ecology & Management 155 (1-3): 291-302.

Barber, V.A., G.P. Juday, B.P Finney. 2000. Reduced growth of Alaska white spruce in the twentieth century from temperature-induced drought stress. Nature 405: 668-673.

Waide R.B.; Willig, M.R. ; Mittelbach, G.; Steiner, C.; Gough, L.; Dodson, S.I.; Juday, G.P.; Parmenter. R. 1999. The relationship between productivity and species richness. Annual Review of Ecology and Systematics. 30:257-300.

Densmore, R.V.; Juday, G.P.; Zasada, J.C. 1999. Regeneration alternatives for upland white spruce after burning and logging in interior Alaska. Canadian Journal of Forest Research 29(4): 413-423.

Ott, R,A., Juday, G.P., and T.E. Garvey. 1999. Conducting a landscape-level wind risk assessment on northeast Chichagof Island, southeast Alaska, and its potential use for forest management. Pages 202-210 In: Proceedings of the Annual Meeting of the Society of American Foresters, 20 - 24 September, 1998. Traverse City, Michigan.

Juday, Glenn Patrick. 1998. Alaska Research Natural Areas: 4. Big Windy Hot Springs. Agricultural and Forestry Experiment Station Miscellaneous Publication 98-1. University of Alaska Fairbanks, Fairbanks, Alaska. 47 p.

Malmstrom, Carolyn M.; Thompson, Matthew V.; Juday Glenn P.; Los, Sietse O.; Randerson, James T; Field, Christopher B. 1997. Interannual Variation in Global-Scale Net Primary Production: Testing Model Estimates. Global Biogeochemical Cycles 11(3):367-392.

Juday, Glenn Patrick. 1996 (on-line version issued Jan. 1996). Boreal Forests (Taiga) In: The Biosphere and Concepts of Ecology. Volume 14 Encyclopedia Britannica, 15th edition. pp. 1210-1216. [hardcopy version in printed and bound volume 1997]

Examples of outreach activities: 

Invited Seminar, Fire and Ice, Centre for Research in the Arts, Social Sciences, and Humanities, Cambridge University, Cambridge, UK. January, 2013.

Member, University Advisory Board, Center for Legislative Energy and Environmental Research, The Energy Council. March, 2013 and continuing. Washington, D.C. and other North American locations.

Consulting Expert Reviewer, USDA Forest Service, Draft Programmatic Environmental Impact Statement, National Forest System Land Management Planning, March/April, 2011.

Lead scientist, training workshop, Catholic Coalition on Climate Change, March 3-5, 2011. Los Gatos, CA.

Lead scientist, training workshop, Catholic Coalition on Climate Change, December 3-5, 2010. Potomac, MD.

Invited Seminar, Yale University School of Forestry and Environmental Studies, December 2, 2010. New Haven, CT.

Invited presenter, participant, and reviewer - National Academy of Sciences, Polar Research Board Workshop on Frontiers in Understanding Climate Change and Polar Ecosystems, August 24-25, 2010. Cambridge, MD.

Invited opening plenary presenter, National Park Service Leadership Council (Director, Deputy and Regional Directors) meeting, August 10, 2010. Denali National Park.

Invited opening plenary presenter, Association of Natural Resource Extension Professionals, 7th Biennial Conference, June 28, 2010. Fairbanks, AK.

Keynote Speaker, Alaska Society of American Foresters Annual Meeting, April 30, 2010. Anchorage, AK.

Invited author, research career retrospective for Witness the Arctic, NSF Arctic Sciences Division, October, 2009.

Invited opening plenary speaker, Wetlands 2008 (Annual Meeting of Association of State Wetland Managers and Wetland Scientists. September 15, 2008. Portland, Oregon.

Invited Speaker, Aspen Environment Forum sponsored by National Geographic Society and the Aspen Institute. Aspen, Colorado, March 26-30, 2008.

Invited Testimony to U.S. House Committee on Science and Technology, (Oct. 17, 2007).

Invited plenary presenter, Defenders of Wildlife, Innovations in Wildlife Conservation Symposium, Reducing The Impact Of Global Warming On America’s Wildlife. September 27, 2007. Capitol Hilton Hotel, Washington, DC.

Invited Testimony to U.S. House Select Committee on Energy Independence and Global Warming, (Sep. 25, 2007).

Lead University of Alaska presenter to Alaska Climate Change Impact Commission, Dec. 7, 2006, University of Alaska Fairbanks, Fairbanks, Alaska.

Member, National Science Executive Team, Yukon River Basin Initiative. Joint US Geological Survey/University of Alaska climate change research project developed for FY2008/2009 implementation as new model of large-scale interdisciplinary priority research.

Invited Seminar Speaker (2nd time) Climate Change Is Strongly Affecting the Boreal Forests of Alaska, Capitol Hill Seminar, Sponsored by American Meterological Society. July 14, 2006, Russell Senate Office Building, Washington, D.C.

Field Trip leader, Alaska field investigation, U.S. Senate Commerce Committee, Subcommittee on Climate Change, August 17, 2005. Senators, J. McCain, H. Clinton, L. Graham, S. Collins.

Research featured in February 2004 issue of National Geographic on Carbon Cycle, and October issue on global warming.

Invited speaker and workshop participant, Workshop on Sustainability, Royal Swedish Academy of Sciences, Stockholm, January, 2003.

Certificate of recognition for outstanding accomplishments of Forest Ecology Working Group (WG), Society of American Foresters (SAF), presented to Chairman of WG at SAF National Convention, November 17, 2000, Washington D.C.

Lead author (nominated by peers), Chapter on Forestry and Agriculture, Arctic Climate Impact Assessment international project ( ), 2002-2005.

Co-convenor of the National Climate Forum, authorized by "Global Change Research Act of 1990" (P.L. 101-606) the co-preparer of a national assessment which analyzes the effects of global change on the natural environment, agriculture, energy production and use, land water resources, transportation, human health and welfare, human social systems, and biological diversity. Sponsored by U.S. Global Change Research Program, in cooperation with the White House Office of Science and Technology Policy (OSTP) National Climate Forum held at U.S. Department of Commerce Building, Washington, D.C. Nov. 11-12, 1997.

Chair and Chair-Elect, Society of American Foresters Forest Ecology Working Group 1997-99. Responsible for SAF Annual Convention Program, Technical Sessions, policy advice to National SAF.

Award of Special Appreciation from Chief, USDA Forest Service “In recognition of contribution to the Alaska Research Natural Area Program including identification of RNAs and establishment of important monitoring plots within RNAs.” 1994.

Paid consultant to Exxon Valdez Trustee Council and Restoration Program, Anchorage, Alaska, Jan. 1994 - 1999. Contributor to Guiding Principles document for restoration program of Exxon Valdez Oil Spill and author of Introduction to Ecosystems document.  

Back to Top