North American Arctic Transect
Posters
Talks
- Walker, D.A. 2019. Landscape evolution and adapting to change in ice-rich permafrost systems (NNA-IRPS). Institute of Arctic Biology (IAB) Life Sciences Seminar Series. University of Alaska Fairbanks, Fairbanks, AK, October 25. (Oral Presentation)
- Walker, D.A. 2019. Landscape evolution and adapting to change in ice-rich permafrost systems (NNA-IRPS). Presented at Bridging Science, Art, and Community in the New Arctic, UVA, Charlottesville, Virginia, 23-25 September. (Oral Presentation)
- Epstein H.E. 2016. Patterns and dynamics of arctic tundra plant diversity and relations to ecosystem processes. Presented at URPP Global Change and Biodiversity Conference, Monte Veritá; Ascona, Switzerland, Aug 28-Sept 1. (Oral Presentation)
- Buchhorn, M., Curry, T., Kanevskiy, M., Raynolds, M.K., Shur, Y. and Walker, D.A. 2015. Landscape, permafrost, and social change in the Prudhoe Bay region, Alaska: Snapshots from the NSF-ArcSEES project. Institute of Arctic Biology (IAB) Life Sciences Seminar Series. University of Alaska Fairbanks, Fairbanks, AK,, January 23. (Oral Presentation)
- Walker, D.A., Kuss, H.P., Kopecky, M., Frost, G.V., Daniëls, F.J.A., Kade, A.N., Vonlanthen, C.M., Raynolds, M.K., Epstein, H.E. 2011. The North American and Eurasia Arctic transects: Using phytosociology and remote sensing to detect vegetation pattern and change. Presented at European Vegetation Survey 20th Workshop. Rome, Italy April 6-9. (Oral Presentation)
- Munger, C.A., Walker, D.A., Maier, H.A., Hamilton, T.D. 2008. Spatial analysis of glacial geology, surficial geomorphology, and vegetation in the Toolik Lake region: Relevance to past and future land-cover changes. Presented at Ninth International Conference on Permafrost. Fairbanks, AK June 29 - July 3, 2:1255-1260. (Oral Presentation)
- Peterson, R.A. 2008. Numerical modeling of differential frost heave. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3, 2:1399-1404. (Oral Presentation)
- Romanovsky, V.E., Marchenko, S.S., Daanen, R., Sergeev, D.O., Walker, D.A. 2008. Soil climate and frost heave along the permafrost/ecological North American Arctic transect. Ninth International Conference on Permafrost. Fairbanks, AK, June 28-July3, 2:1519-1524. (Oral Presentation)
- Walker, D.A. 2008. Arctic sea ice, Arctic vegetation change and lessons from 2007. Presented at Arctic Observation Integration Workshop. Palisades, NY March 17-20. (Oral Presentation)
- Walker, D.A. 2008. Greening of the Arctic: An IPY Initiative. Does the loss of sea ice affect the tundra and those who depend on it?. Presented at Institute of Arctic Biology Seminar. Fairbanks, AK November 21. (Oral Presentation)
- Walker, D.A. 2008. Biocomplexity of Arctic Patterned Ground: A tale of cracking, heaving, and smothering!. Presented at Dynamics of Complex Systems: Common Threads Workshop. Fairbanks, AK 6 August. (Oral Presentation)
- Michaelson, G.J., Ping, C.L., Epstein, H.E., Kimbel, J.M., Romanovsky, V.E., Tarnocai, C.T., Walker, D.A. 2006. Soil Properties and Patterned Ground Across the North American Arctic Transect. AGU Fall Meeting. San Francisco, CA, December 11-15, C51A-0397. (C51A-0397)
- Munger, C.A., Walker, D.A., Raynolds, M.K., Kade, A.N., Vonlanthen, C.M., Kuss, P., Daanen, R.P. 2006. The North American Arctic Transect: baseline vegetation and active layer maps for the IPY. AGU Fall Meeting. San Francisco, CA, December 11 - 15, C51A-0382. (C51A-0382)
- Romanovsky, V.E., Marchenko, S.S., Daanen, R., Nikolsky, D., Sergeev, D.O., Walker, D.A. 2006. Soil climate and frost heave along the permafrost/ecological North American Arctic Transect. AGU Fall Meeting. San Francisco, CA, December 11 - 15, C44A-06. (C44A-06) (Oral Presentation)
- Walker, D.A. 2006. Complexity in natural biological ecosystems: Interactions of physical and biological processes in the formation of small patterned-ground features across the Arctic climate gradient. Presented at Dynamics of Complex Systems: Common Threads Workshop. Fairbanks, AK July 5-7. (Oral Presentation)
- Epstein, H.E., D.A. Walker, G.J. Jia, Kelley, A.M. 2005. Climate, plant biomass, NDVI, and LAI relationships along the full arctic bioclimate gradient. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:B33E-1092. (B33E-1092) (Oral Presentation)
- Jia, G.J., Epstein, H.E., Walker, D.A. 2005. Uneven response of arctic tundra to recent environmental changes. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:B33E-1091. (B33E-1091) (Oral Presentation)
- Kade, A., Walker, D.A., Romanovsky, V.E. 2005. The effect of vegetation, soil organic layer and snow on the modified N-factor in patterned-ground ecosystems. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:C21C-1135. (C21C-1135) (Oral Presentation)
- Kelley, A.M., Epstein, H.E., Walker, D.A. 2005. Soil nitrogen cycling associated with small patterned ground features along a high-latitude temperature gradient in northern Alaska. AGU Fall Meeting, San Francisco, CA, December 5-9, B51A-0193. (B51A-0193) (Oral Presentation)
- Ping, C.-L., Kimble, J.M., Michaelson, G.J., Tarnocai, C., Walker, D.A. 2005. Carbon stores and their distribution in different arctic ecosystems. Presented at 1st Climate and Cryosphere International Science Conference. Beijing, China April 11 - 15. (Oral Presentation)
- Ping, C.-L., Michaelson, G.J., Tarnocai, C., Walker, D.A. 2005. Cryogenic features of tundra soils along a bioclimate gradient in arctic Alaska and Canada. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:C24A-05. (C24A-05) (Oral Presentation)
- Raynolds, M.K., Walker, D.A., Kade, A.N., Munger, C.A. 2005. Small-scale patterned ground in the Arctic: Maps of vegetation and thaw depth on a north-south transect. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:C24A. (C24A-06) (Oral Presentation)
- Shur, Y., Ping, C.L., Walker, D.A. 2005. Comprehensive model of frost boils and earth hummocks formation. Presented at 2nd European Conference on Permafrost. Potsdam, Germany 12-16 June. (Oral Presentation)
- Tarnocai, C., Walker, D. 2005. Turf hummocks along a climatic gradient in Arctic Canada: characteristics and development. Presented at 2nd European Conference on Permafrost. Potsdam, Germany June 12-16.
- Walker, D.A. 2005. Biocomplexity of small patterned-ground features: A North American Arctic Transect. Presented at Institute of Arctic Biology Seminar. Fairbanks, AK October 28. (Oral Presentation)
- Walker, D.A., Daanen, R.P., Epstein, H.E., Gonzalez, G., Gould, W.A., Kade, A.N., Kelley, A.M., Krantz, W.B., Michaelson, G.J., Munger, C.A., Nickolsky, D.J., Peterson, R.A., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Shur, Y.L., Tarnocai, C.T., Tipenko, G.S., Timling, I., Vonlanthen, C.M. 2005. The North American Arctic Transect: Patterned ground ecosystems across the full arctic bioclimate gradient. AGU Fall Meeting, San Francisco, CA, December 5-9, 86:C24A-03. (C24A-03) (Oral Presentation)
- Chappell, G.G., Brody, B., Webb, P., Chord, J., Romanovsky, V., Tipenko, G. 2004. Virtual Reality Visualization of Permafrost Dynamics Along a Transect Through Northern Alaska. AGU Fall Meeting, San Francisco, CA, December 13-17, 85:C43B-0231. (C43B-0231) (Oral Presentation)
- Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2004. A coupled thermo-mechanical model of differential frost heave. AGU Fall Meeting, San Francisco, CA, December 13-17, 85:C13B-0282. (C13B-0282) (Oral Presentation)
- Tipenko, G.S., Marchenko, S., Romanovsky, V.E., Groshev, V., Sazonova, T. 2004. Spatially Distributed Model of Permafrost Dynamics in Alaska. AGU Fall Meeting, San Francisco, CA, December 13-17, 85:C12A-02. (C12A-02) (Oral Presentation)
- Walker, D.A. 2004. Greening of the Arctic: A transect to monitor terrestrial change across the full Arctic bioclimate gradient. Presented at IPY Workshop. Fairbanks, AK November 29. (Oral Presentation)
- Gould, W.A., Quijano, A., Gonzalez, G., Walker, D.A. 2003. Variation in frost-boil morphology and associated vegetation characteristics along a climatic gradient. AGU Fall Meeting, San Francisco, CA, December 8-12, 84:B31C-0311. (B31C-0311)
- Nicolsky, D.J., Tipenko, G.S., Romanovsky, V.E. 2003. Developing a numerical model of frost boils dynamics. AGU Fall Meeting, San Francisco, CA, December 8-12, 84:C21B-0813. (C21B-0813)
- Peterson, R.A., Walker, D.A., Romanovsky, V.E., Knudson, J.A., Raynolds, M.K., Krantz, W.B. 2003. A differential frost heave model: cryoturbation-vegetation interactions. Proceedings of the Eighth International Conference on Permafrost. Lisse, 21-25 July, 2:885-890. (Complete set of PDFs) (Oral Presentation)
- Shur, Y.L., Ping, C.L. 2003. The Driving Force of Frost Boils and Hummocks Formation. AGU Fall Meeting, San Francisco, CA, December 8-12, 84:C21B-0823. (C21B-0823) (Oral Presentation)
- Walker, D.A. 2003. Biocomplexity of frost-boil ecosystems: 2003 Expedition to Banks Island. Presented at Institute of Arctic Biology Seminar. Fairbanks, AK 2003. (Oral Presentation)
- Walker, D.A., Kade, A.N., Michaelson, G., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Epstein, H.E., Kelley, A.M., Gould, W.A., González, G., Krantz, W.B., Tarnocai, C.T. 2003. Biocomplexity of frost boil ecosystems: 2003 expedition to Banks Island and Prince Patrick Island, Canada. Presented at 54th Arctic Science Conference. Fairbanks, Alaska 22 - 24 September. (Oral Presentation)
- Michaelson, G.J., Ping, C.L., Walker, D.A. 2002. Biogeochemistry of Soils Associated with Cryptogamic Crusts on Frost Boils. Presented at AGU Fall Meeting, San Francisco, CA, December 6-10, 83:F260.
- Ping, C.-L., Michaelson, G.J., Kimble, J., Shur, Y.L., Walker, D.A. 2002. Morphogenesis of soils associated with frost boils. Presented at AGU Fall Meeting, San Francisco, CA, December 6-10, 83:F259. (Oral Presentation)
- Walker, D.A., Jia, G.J., Epstein, H.E., Shiklomanov, N.I., Nelson, F.E., Hinzman, L.D., Romanovsky, V.E. 2002. Vegetation-soil-active layer relationships along a low-arctic bioclimate gradient, Alaska. AGU Fall Meeting, San Francisco, CA, December 6-10, 83:B72D-02. (B72D-02) (Oral Presentation)
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Posters
- Bhatt, U.S., Walker, D.A., Raynolds, M.K., Bieniek, P.A., Epstein, H.E., Jia, G.J., Comiso, J.C., Pinzon, J.E., Tucker, C.J. 2011. Seasonal changes of the ice-ocean-atmosphere-terrestrial system on the Yamal. Presented at LCLUC Science Team Meeting. Adelphi, MD March 28-30. (Poster)
- Epstein, H.E., Yu, Q., Frost, G.V., Raynolds, M.K., Walker, D.A., Forbes, B.C. 2011. Effects of climate, grazing, and gas development on tundra ecosystems of the Yamal Peninsula, northwestern Siberia. Presented at LCLUC Science Team Meeting. Adelphi, MD . (Poster)
- Walker, D.A., Raynolds, M.K., Epstein, H.E., Bhatt, U.S., Frost, G.V., Jia, G.J., Comiso, J.C., Pinzon, J.E., Tucker, C.J. 2011. Greening of the Arctic: Spatial variation of biomass and NDVI along two Arctic transects and the Circumpolar Arctic. Presented at LCLUC Science Team Meeting. Adelphi, MD March 28-30. (Poster)
- Yu, Q., Epstein, H.E., Walker, D.A. 2011. Modeling dynamics of tundra plant communities on the Yamal Peninsula. Presented at LCLUC Science Team Meeting. Adelphi, MD March 28-30. (Poster)
- Daanen, R., Romanovsky, V., Walker, D., LaDouceur, M. 2008. High resolution, surface and subsurface survey of a non-sorted circle system. Ninth International Conference on Permafrost. Fairbanks, AK, June 29 - July 3, 1:321-326. (Session 1P-9-62) (Poster)
- Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2008. Modeling observed differential frost heave within non-sorted circles in Alaska. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3, 2:1281-1286. (Session 3P-6-54) (Poster)
- Walker, D.A. 2008. North American Arctic Transect. Presented at 20th Annual Meeting and Arctic Forum. Washington, D.C. May 13-15 . (Poster)
- Daanen, R., Misra, D., Epstein, H.E. 2005. Modeling the Hydrology and the Effect of Climate Warming on the Non-Sorted Circle Ecosystem in the Arctic Tundra. AGU Fall Meeting, San Francisco, CA, December 5-9. (H53C-0477) (Poster)
- Kuss, P. 2004. Cassiope tetragona - Dryas integrifolia Non-acidic Snowbed Communities Along the Thompson River, Banks Island, Canada. Presented at Second International Workshop on Circumpolar Vegetation Classification and Mapping. Tromsø, Norway June 2-6. (Poster)
- Ping, C.-L., Michaelson, G.J., Overduin, P.P., Stiles, C.A. 2003. Morphogenesis of frost boils in the Galbraith Lake area, arctic Alaska. Eighth International Conference on Permafrost Extended Abstracts. Zurich, Switzerland, July 21 - 25, 2:897-900. (Poster)
- Walker, D.A., Kade, A.N., Michaelson, G.J., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Epstein, H.E., Kelley, A.M., Gould, W.A., Gonzalez, G., Krantz, W.B., Tarnocai, C.T. 2003. Biocomplexity of Frost-Boil Ecosystems: Models for self-organization across the Arctic Bioclimate Gradient. Presented at Biocomplexity in the Environment Awardees Meeting. Arlington, VA 14 - 17 September.
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