Greening of the Arctic: An IPY Initiative

Publications:

  1. 2012
    1. Fauria, M.M., Forbes, B.C., Zetterberg, P., Kumpula, T. 2012. Eurasian Arctic greening reveals teleconnections and the potential for novel ecosystems. Nature Climate Change.
    2. Kumpula, T., Forbes, B.C., Stammler, F., Meschtyb, N. 2012. Dynamics of a Coupled System: Multi-Resolution Remote Sensing in Assessing Social-Ecological Responses during 25 Years of Gas Field Development in Arctic Russia. Remote Sensing: Human-Induced Global Change. 4:(4):1046-1068. PDF
    3. Raynolds, M.K., Walker, D.A., Epstein, H.E., Pinzon, J.E., Tucker, C.J. 2012. A new estimate of tundra-biome phytomass from trans-Arctic field data and AVHRR NDVI. Remote Sensing Letters. 3:403-411. PDF

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  1. 2011
    1. Bhatt, U.S. 2011. The role of seasonality and large-scale climate drivers in recent Pan-Arctic tundra vegetation variability and change. Abstract GC51F-1075, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. PDF
    2. Bieniek, P.A., Bhatt, U.S., Walker, D.A., Raynolds, M.K., Comiso, J.C. 2011. Impacts of Changing Seasonality on Arctic Systems and an Arctic in Rapid Transition II. Abstract GC32A-04, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. PDF
    3. Frost, G.V., Epstein, H.E., Walker, D.A., Matyshak, G., Ermokhina, K. 2011. Tall shrub expansion facilitated by patterned ground in the northwest Siberian Low Arctic. Abstract GC51F-1058, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. PDF
    4. Goetz, S.J., Epstein, H.E., Alcaraz, J.D., Beck, P.S.A., Bhatt, U.S., Bunn, A., Comiso, J.C., Jia, G.J., Kaplan, J.O., Lilschke, H., Lloyd, A., Walker, D.A., Yu, Q. 2011. Recent changes in Arctic vegetation: Satellite observations and simulation model predictions. in G. Gutman, A. Reissell (eds.) Eurasian Arctic Land Cover and Land Use in a Changing Climate. Springer. New York. VI pp. 9-36. PDF
    5. Khitun, O.V., Ermokhina, K.A., Leibman, M.O., Khomutov, A.V. 2011. Plant species indicating the depth of active layer on the Bely Island. Fourth Russian Conference on Geocryology. Moscow, Russia, June 7-9.
    6. Kumpula, T., Pajunen, A., Kaarlejärvi, E., Forbes, B.C., Stammler, F. 2011. Land use and land cover change in Arctic Russia: Ecological and social implications of industrial development. Global Environ. Change. PDF
    7. Leibman, M.O., Moskalenko, N.G., Orekov, P.T., Khomutov, A.V., Walker, D.A., Epstein, H.E. 2011. Interaction of cryogenic and biotic components in cryolithozone of the West Siberia along the Yamal transect. in (eds.) Polar cryosphere and hydrosphere of the Land. 3.
    8. Pinzon, J.E., Raynolds, M.K., Pak, E.W., Bhatt, U.S., Walker, D.A., Tucker, C.J. 2011. GIMMS3g: a consistent long term vegetation index data set optimized for polar trend analysis. Geoscience and Remote Sensing Letters.
    9. Walker, D.A., Bhatt, U.S., Callaghan, T.V., Comiso, J.C., Epstein, H.E., Forbes, B.C., Gill, M., Gould, W.A., Henry, G.H.R., Jia, G.J., Kokelj, S.V., Lantz, T.C., Oberbauer, S.F., Pinzon, J.E., Raynolds, M.K., Shaver, G.R., Tucker, C.J., Tweedie, C.E., Webber, P.J. 2011. The Arctic: Land: Vegetation. [In: State of the Climate in 2010]. Bulletin of the American Meteorological Society. 92:S150-S152. - State of the Climate in 2010
    10. Walker, D.A., Bhatt, U.S., Callaghan, T.V., Comiso, J.C., Epstein, H.E., Forbes, B.C., Gill, M., Gould, W.A., Henry, G.H.R., Jia, G.J., Kokelj, S.V., Lantz, T.C., Oberbauer, S.F., Pinzon, J.E., Raynolds, M.K., Shaver, G.R., Tucker, C.J., Tweedie, C.E., Webber, P.J. 2011. Vegetation. in Richter-Menge, J., Jeffries, M.O., Overland, J.E. (eds.) Arctic Report Card 2011. NOAA. pp. 8. PDF - Arctic Report Card
    11. Walker, D.A., Bhatt, U.S., Raynolds, M.K., Bieniek, P.A., Epstein, H.E., Frost, G.V., Leibman, M.O., Forbes, B.C., Comiso, J.C., Tucker, C.J., Pinzon, J. 2011. Satellite and land-based observations of environment, vegetation and NDVI along two Arctic Transects: Partial results from the IPY Greening of the Arctic Project. Abstract GC51F-1072, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. PDF
    12. Walker, D.A., Forbes, B.C., Leibman, M.O., Epstein, H.E., Bhatt, U.S., Comiso, J.C., Drozdov, D.S., Gubarkov, A.A., Jia, G.J., Karlejaärvi, E., Kaplan, J.O., Khumutov, V., Kofinas, G.P., Kumpula, T., Kuss, P., Moskalenko, N.G., Raynolds, M.K., Romanovsky, V.E., Stammler, F., Yu, Q. 2011. Cumulative effects of rapid land-cover and land-use changes on the Yamal Peninsula, Russia. in G. Gutman, A. Reissel (eds.) Eurasian Arctic Land Cover and Land Use in a Changing Climate. Springer. New York. VI pp. 206-236. PDF
    13. Walker, D.A., Kuss, H.P., Epstein, H.E., Kade, A.N., Vonlanthen, C., Raynolds, M.K., Daniëls, F.J.A. 2011. Vegetation of zonal patterned-ground ecosystems along the North American Arctic Transect. Applied Vegetation Science. 14:440-463. PDF
    14. Yu, Q. 2011. Modeling dynamics of circum-arctic tundra plant communities in response to climate warming and grazing pressure. Abstract GC41C-0831 , presented at AGU Fall Meeting. San Francisco, cA, December 5-9. PDF
    15. Yu, Q., Epstein, H.E., Walker, D.A., Frost, G.V., Forbes, B. 2011. Modeling dynamics of tundra plant communities on the Yamal Peninsula, Russia, in response to climate change and grazing pressure. Environmental Research Letters. 6:(4). PDF - Environmental Research Letters

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  1. 2010
    1. Alcaraz, J.D., Cabello, J., Epstein, H.E., Jia, G.J. 2010. Trends in the surface vegetation dynamics of the tundra and taiga network of protected areas in Eurasia as observed by satellite sensors. in prep..
    2. Bhatt, U.S., Walker, D.A., Raynolds, M.K., Bieniek, P.A., Epstein, H.E., Comiso, J.C., Pinzon, J.E., Tucker, C.J., Polyakov, I.V., Liu, Y., Gens, R., Tweedie, C.E., Webber, P.J., Steele, M., Jia, G.J. 2010. Understanding drivers of recent Arctic tundra vegetation changes. Abstract GC43B-08, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    3. Bhatt, U.S., Walker, D.A., Raynolds, M.K., Comiso, J.C., Epstein, H.E., Jia, G.J., Gens, R., Pinzon, J.E., Tucker, C.J., Tweedie, C.E., Webber, P.J. 2010. Circumpolar Arctic tundra vegetation change is linked to sea-ice decline. Earth Interactions. 14:(8):1-20. PDF
    4. Bieniek, P.A., Bhatt, U.S., Walker, D.A., Raynolds, M.K., Comiso, J.C., Epstein, H.E., Gens, R., Pinzon, J.E., Tucker, C.J., Steele, M., Ozimek, C. 2010. Alaska tundra vegetation trends and their links to the large-scale climate. Abstract GC43B-0976, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    5. Forbes, B.C., Fauria, M.M., Zetterberg, P. 2010. Russian Arctic warming and 'greening' are closely tracked by tundra shrub willows. Global Change Biology. 1542-1554:1542-1554. PDF
    6. Forbes, B.C., Fauria, M.M., Zetterberg, P., Kumpula, T. 2010. Deciduous shrub growth and the greening of the Arctic in West Siberia. Abstract GC53B-08, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    7. Frost, G.V., Epstein, H.E., Walker, D.A., Yu, Q., Raynolds, M.K. 2010. Spatio-temporal trends in vegetation structure and NDVI in Low Arctic northwest Siberia: evidence from the satellite record and ground observations. Abstract GC54A-03, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    8. Kumpula, T., Forbes, B.C., Stammler, F. 2010. Remote sensing and local knowledge of hydrocarbon exploitation: the case of Bovanenkovo, Yamal Peninsula, West Siberia, Russia. Arctic. 63:(2):165-178.
    9. Raynolds, M.K., Walker, D.A., Verbyla, D., Munger, C.A. 2010. Changes in tundra vegetation over 25 years as measured by Landsat NDVI in the Upper Kuparuk River Basin, North Slope Alaska, 1985-2009. Abstract GC43B-0984, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    10. Walker, D.A. 2010. Greening of the Arctic: Spatial and temporal (1982-2009) variation of circumpolar tundra NDVI and aboveground biomass. Abstract GC53B-01, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF
    11. Walker, D.A., Bhatt, U.S., Comiso, J.C., Epstein, H.E., Gould, W.A., Henry, G.H.R., Jia, G.J., Kokelj, S.V., Lantz, T.C., Mercado-Diaz, J.A., Pinzon, J.E., Raynolds, M.K., Shaver, G.R., Tucker, C.J., Tweedie, C.E., Webber, P.J. 2010. The Arctic: Land: Vegetation. Bulletin of the American Meteorological Society. 91:(7):S115-S116. PDF - State of the Climate in 2009
    12. Walker, D.A., Raynolds, M.K., Maier, H.A., Barbour, E.M., Neufeld, G.P. 2010. Circumpolar geobotanical mapping: a web-based plant-to-planet approach for vegetation-change analysis in the Arctic. Viten. 1:125-128. PDF - (Conference Website)
    13. Walker, D.A., Walker, M.D., Gould, W.A., Mercado, J., Auerbach, N.A., Maier, H.A., Neufeld, G.P. 2010. Maps for monitoring changes to vegetation structure and composition: The Toolik and Imnavait Creek grid plots. Viten. 1:121-123. PDF - (Conference Website)
    14. Yu, Q., Epstein, H.E., Walker, D.A., Frost, G.V. 2010. Modeling dynamics of tundra plant communities on the Yamal Peninsula. Abstract GC54A-04, presented at AGU Fall Meeting. San Francisco, CA, 13-17 December. PDF

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  1. 2009
    1. Bhatt, U.S., Walker, D.A., Raynolds, M.K., Steele, M., Epstein, H.E., Jia, G.J., Comiso, J.C., Pinzon, J.E., Tucker, C.J. 2009. Seasonality of the air-sea-ice-land environment of Arctic tundra in Northern Eurasia and North America. Abstract GC31A-0701, presented at AGU Fall Meeting. San Francisco, CA, December 14-18. 90:GC31A-0701. PDF
    2. Epstein, H.E., Walker, D.A., Raynolds, M.K., Kelley, A.M., Jia, G.J., Ping, C.L., Michaelson, G.J., Liebman, M.O., Kaarlejärvi, E., Khumotov, A.V., Kuss, H.P., Moskalenko, N.G., Orekhov, P., Matyshak, G., Forbes, B.C., Yu, Q. 2009. Vegetation biomass, leaf area index, and NDVI patterns and relationships along two latitudinal transects in arctic tundra. Abstract GC31A-0697, presented at AGU Fall Meeting. San Francisco, CA, December 14-18. 90:GC31A-0697. PDF
    3. Forbes, B.C., Stammler, F., Kumpula, T., Meschtyb, N., Pajunen, A., Kaarlejärvi, E. 2009. High resilience in the Yamal-Nenets social-ecological system, West Siberian Arctic, Russia. Proc. Natl. Acad. Sci.. 106:(52):22041-22048. PDF
    4. Frost, G.V., Epstein, H.E., Walker, D.A. 2009. Spatio-temporal trends in tree and tall shrub cover in the Eurasian Low Arctic: evidence from 1960s and contemporary satellite imagery and ground observations. Abstract GC31A-0698, presented at AGU Fall Meeting. San Francisco, CA, December 14-18. 90:GC31A-0698. PDF
    5. Groisman, P.Y., Clark, E.A., Kattsov, V.M., Lettenmaier, D.P., Sokolik, I.N., Aizen, V.B., Cartus, O., Chen, J., Conard, S., Katzenberger, J., Krankina, O., Kukkonen, J., Machida, T., Maksyutov, S., Ojima, D., Qi, J., Romanovsky, V.E., Santoro, M., Schmullius, C.C., Shiklomanov, A.I., Shimoyama, K., Shugart, H.H., Shuman, J.K., Sofiev, M.A., Sukhinin, A.I., Vorosmarty, C., Walker, D.A., Wood, E.F. 2009. The Northern Eurasia Earth Science Partnership: An example of Science Applied to Societal Needs. Bulletin of the American Meteorological Society. 90:671-688. PDF - Permanent link
    6. Jia, G.J., Epstein, H.E., Walker, D.A. 2009. Vegetation greening in the Canadian Arctic related to decadal warming. Journal of Environmental Monitoring. 11:2231-2238. - Purchase PDF
    7. Kelley, A.M., Epstein, H.E. 2009. Effects of nitrogen fertilization on plant communities of nonsorted circles in moist nonacidic tundra, Northern Alaska. Arctic, Antarctic, and Alpine Research. 41:(1):119-127. PDF - BioOne online article
    8. Leibman, M.O., Khomutov, A.V. 2009. Environmental controls of the thaw depth and rate of thaw under climate fluctuations. Abstract Abstract, presented at Association of American Geographers Annual Meeting. Las Vegas, NV, March 22-27. PDF
    9. Leibman, M.O., Ukraintseva, N.K. 2009. Mechanisms and geoecological consequences of cryogenic landslides in the area of marine sedimentation. Abstract EGU2009-3980, presented at European Geosciences Union General Assembly 2009. Vienna, Austria, April 19-24. 11:EGU2009-3980.
    10. Ravilious, K. 2009. Siberia's Arctic landscape is getting greener. Environmental Research Web. - Environmental Research Web
    11. Raynolds, M.K., Walker, D.A. 2009. Effects of deglaciation on circumpolar distribution of arctic vegetation. Canadian Journal of Remote Sensing. 35:(2):118-129. PDF - Permanent link
    12. Walker, D.A., Bhatt, U.S., Epstein, H.E., Raynolds, M.K., Frost, G.V., Liebman, M.O., Khumotov, A.V., Jia, G.J., Forbes, B.C., Comiso, J.C., Pinzon, J.E., Tucker, C.J., Webber, P.J., Tweedie, C.E. 2009. Circumpolar Arctic greening: Relationships to summer sea-ice concentrations, land temperatures and disturbance regimes. Abstract GC43B-08, presented at AGU Fall Meeting. San Francisco, CA, December 14-18. 90:GC43B-08. PDF
    13. Walker, D.A., Bhatt, U.S., Raynolds, M.K., Comiso, J.C., Epstein, H.E., Jia, G.J. 2009. The Arctic: Land: Vegetation. Bulletin of the American Meteorological Society. 90:(8):S104-S105. PDF - State of the Climate in 2008
    14. Walker, D.A., Bhatt, U.S., Raynolds, M.K., Comiso, J.C., Epstein, H.E., Jia, G.J., Pinzon, J.E., Tucker, C.J. 2009. Vegetation. in Richter-Menge, J., Jeffries, M.O., Overland, J.E. (eds.) Arctic Report Card 2008. NOAA. pp. 3. PDF - Arctic Report Card
    15. Walker, D.A., Hamilton, T.D., Ping, C.-L., Daanen, R.P., Streever, W.W. 2009. Dalton Highway Field Trip Guide for the Ninth International Conference on Permafrost. Division of Geological and Geophysical Surveys. Fairbanks, AK. 9. 117 . PDF
    16. Walker, D.A., Leibman, M.O., Epstein, H.E., Forbes, B.C., Bhatt, U.S., Raynolds, M.K., Comiso, J., Gubarkov, A.A., Khomutov, A.V., Jia, G.J., Kaarlejärvi, E., Kaplan, J.O., Kumpula, T., Kuss, H.P., Matyshak, G., Moskalenko, N.G., Orechov, P., Romanovsky, V.E., Ukraientseva, N.K., Yu, Q. 2009. Spatial and temporal patterns of greenness on the Yamal Peninsula, Russia: interactions of ecological and social factors affecting the Arctic normalized difference vegetation index. Environmental Research Letters. 4:16. PDF
    17. Yu, Q., Epstein, H.E., Walker, D.A. 2009. Simulating soil organic nitrogen and grazing effects on arctic vegetation dynamics on the Yamal Peninsula, Russia. Environmental Research Letters. 4:(4). PDF
    18. Yu, Q., Epstein, H.E., Walker, D.A. 2009. Simulating soil organic nitrogen and grazing effects on arctic tundra vegetation dynamics on the Yamal Peninsula, Russia. Abstract GC31A-0693, presented at AGU Fall Meeting. San Francisco, CA, December 14-18. 90:GC31A-0693.

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  1. 2008
    1. Biocomplexity of Arctic Tundra Ecosystems - AGU Journal of Geophysical Research Special Collection
    2. Bhatt, U.S., Walker, D.A., Raynolds, M., Comiso, J. 2008. Examining relationships between sea ice and Arctic vegetation on the Pan-Arctic, regional and site scales. Abstract EGU2008-A-11271, presented at European Geosciences Union General Assembly. Vienna, Austria, 13 -18 April. 10:EGU2008-A-11271.
    3. Comiso, J.C., Nishio, F. 2008. Trends in the sea ice cover using enhanced and compatible AMSR-E,SSM/I, and SMMR data. Journal of Geophysical Research. 113:C02S07. PDF
    4. Comiso, J.C., Parkinson, C.L., Gersten, R., Stock, L. 2008. Accelerated decline in the Arctic sea ice cover. Geophysical Research Letters. 35:L01703. PDF - Abstract
    5. Cook, B., Bonan, G., Levis, S., Epstein, H. 2008. Rapid vegetation responses and feedbacks amplify climate model response to snow cover changes. Climate Dynamics. 30:(4):391-406. PDF - Permanent link
    6. Cook, B.I., Bonan, G.B., Levis, S., Epstein, H.E. 2008. The thermoinsulation effect of snow cover within a climate model. Climate Dynamics. 31:(1):107-124. PDF
    7. 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. 321-326. PDF
    8. Daanen, R.P., Misra, D., Epstein, H., Walker, D., Romanovsky, V. 2008. Simulating nonsorted circle development in arctic tundra ecosystems. Journal of Geophysical Research - Biogeosciences. 113:1-10. PDF - Permanent link
    9. Epstein, H.E., Walker, D.A., Kuss, P., Karlejaärvi, E., Matyshak, G. 2008. Ecosystem Properties along a Latitudinal Gradient of the Yamal Region, Russia. Abstract EGU2008-A-04406, presented at European Geosciences Union General Assembly. Vienna, Austria, 13 - 18 April. 10:EGU2008-A-04406. PDF
    10. Epstein, H.E., Walker, D.A., Raynolds, M.K., Jia, G.J., Kelley, A.M. 2008. Phytomass patterns across a temperature gradient of the North American arctic tundra. Journal of Geophysical Research - Biogeosciences. 113:1-11. PDF - Permanent link
    11. Jia, G.J., Epstein, H.E., Walker, D.A., Wang, H. 2008. Decadal changes of phenological patterns over arctic tundra biome. Abstract C21C-0559, presented at AGU Fall Meeting. San Francisco, CA, Dec. 15-19. 89:C21C-0559. PDF
    12. Kade, A., Walker, D.A. 2008. Experimental alteration of vegetation on nonsorted circles: effects on cryogenic activity and implications for climate change in the Arctic. Arctic, Antarctic, and Alpine Research. 40:(1):96-103. PDF - Abstract
    13. Leibman, M.O., Epstein, H.E., Khomutov, A.V., Moskalenko, N.G., Walker, D.A. 2008. Relation of active layer depth to vegetation on the central Yamal Peninsula, Russia. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3. Extended Abstracts:177-178. PDF
    14. Michaelson, G.J., Ping, C.L., Epstein, H., Kimble, J.M., Walker, D.A. 2008. Soils and frost boil ecosystems across the North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S11, 10.1029/2007JG000672. PDF - Abstract
    15. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2008. Modeling biogeophysical interactions in nonsorted circles in the Low Arctic. Journal of Geophysical Research - Biogeosciences. 113:1-17. PDF - Abstract
    16. 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. 1281-1286.
    17. Peterson, R.A. 2008. Numerical modeling of differential frost heave. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3. 1399-1404.
    18. Peterson, R.A., Krantz, W.B.a. 2008. Differential frost heave model for patterned ground formation: Corroboration with observations along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S04, 1-17. PDF - Abstract
    19. Ping, C.-L., Michaelson, G.J., Jorgenson, M.T., Kimble, J.M., Epstein, H., Romanovsky, V.E., Walker, D.A. 2008. High stocks of soil organic carbon in North American Arctic region. Nature Geoscience. 1:615-619. PDF - Abstract
    20. Ping, C.-L., Michaelson, G.J., Kimble, J.M., Romanovsky, V.E., Shur, Y.L., Swanson, D.K., Walker, D.A. 2008. Cryogenesis and soil formation along a bioclimate gradient in Arctic North America. Journal of Geophysical Research - Biogeosciences. 113:G03S12. PDF - Permanent link
    21. Raynolds, M.K., Comiso, J.C., Walker, D.A., Verbyla, D. 2008. Relationship between satellite-derived land surface temperatures, arctic vegetation types, and NDVI. Remote Sensing of Environment. 112:(4):1884-1894. PDF - Permanent link
    22. Raynolds, M.K., Walker, D.A. 2008. Circumpolar relationships between permafrost characteristics, NDVI, and arctic vegetation types. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3. 2:1469-1474. PDF
    23. Raynolds, M.K., Walker, D.A., Munger, C.A., Vonlanthen, C.M., Kade, A.N. 2008. A map analysis of patterned-ground along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:1-18. PDF - Abstract
    24. 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. Vol.2, Part VI:1519-1524. PDF
    25. Vonlanthen, C.M., Walker, D.A., Raynolds, M.K., Kade, A., Kuss, H.P., Daniëls, F.J.A., Matveyeva, N.V. 2008. Patterned-ground plant communities along a bioclimate gradient in the High Arctic, Canada. Phytocoenologia. 38:23-63. PDF - Abstract
    26. Walker, D.A., Barbour, E.M., Maier, H.A. 2008. A Web-based Arctic Geobotanical Atlas and a New Hierarchy of Maps of the Toolik Lake Region, Alaska. Abstract Ninth International Conference on Permafrost, presented at Ninth International Conference on Permafrost. Fairbanks, AK, June 29 - July 3. 1893-1898. PDF
    27. Walker, D.A., Bhatt, U.S., Epstein, H.E. 2008. Greening of the Arctic: an IPY Initiative. Abstract U23F-05 INVITED, presented at AGU Fall Meeting. San Francisco, CA, December 12-15. 89:1. PDF
    28. Walker, D.A., Bhatt, U.S., Romanovsky, V.E., Kofinas, G.P., Raynolds, M.K., Epstein, H.E., Yu, Q., Forbes, B.C., Stammler, F., Karlejäarvi, E., Leibman, M., Moskalenko, N., Gubarkov, A., Khomutov, A., Kumpula, T., Comiso, J.C., Kuss, J.P., Jia, G.J., Kaplan, J.O., Matyshak, G. 2008. Application of space-based technologies and models to address land-cover/land-use change problems on the Yamal Peninsula, Russia. Abstract EGU2008-A-05697, presented at European Geosciences Union General Assembly. Vienna, Austria, April 13-18. 10:EGU2008-A-05697. PDF
    29. Walker, D.A., Epstein, H.E., Romanovsky, V.E., Ping, C.L., Michaelson, G.J., Daanen, R.P., Shur, Y., Peterson, R.A., Krantz, W.B., Raynolds, M.K., Gould, W.A., Gonzalez, G., Nicolsky, D.J., Vonlanthen, C.M., Kade, A.N., Kuss, P., Kelley, A.M., Munger, C.A., Tarnocai, C.T., Matveyeva, N.V., Daniëls, F.J.A. 2008. Arctic patterned-ground ecosystems: A synthesis of field studies and models along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S01. PDF
    30. Walker, D.A., Epstein, H.E., Welker, J.M. 2008. Introduction to special section on Biocomplexity of Arctic Tundra Ecosystems. Journal of Geophysical Research - Biogeosciences. 113:G03S00. PDF - Permanent link
    31. Walker, D.A., Leibman, M.O., Forbes, B.C., Epstein, H.E. 2008. Cumulative effects of rapid climate and land-use changes on the Yamal Peninsula, Russia. Abstract GC52A-07, presented at AGU Fall Meeting. San Francisco, CA, December 15-19. 89:GC52A-07. PDF
    32. Walker, D.A., Raynolds, M.K., Gould, W.A. 2008. Fred Daniëls, Subzone A, and the North American Arctic Transect. Abhandlungen aus dem Westfälischen Museum für Naturkunde. 70:(3/4):387-400. PDF
    33. Yu, Q., Epstein, H.E. 2008. Evaluating Arctic tundra system resilience to grazing disturbances: A modeling approach. Abstract EGU2008-A-12154, presented at European Geosciences Union General Assembly 2008. Vienna, Austria, 13 - 18 April. 10:EGU2008-A-12154. PDF

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  1. 2007
    1. Alcaraz, D., Chuvieco, E., Epstein, H. 2007. Temporal trends in post-fire regeneration patterns of boreal forests using 1km AVHRR NDVI. Abstract B11D-0777, presented at AGU Fall Meeting. San Francisco, CA, December 10-14. 88:5.
    2. Bhatt, U.S., Walker, D.A., Raynolds, M.K., Comiso, J.C. 2007. Influence of Regional Sea Ice Variability on Arctic Tundra. Abstract Online Proceedings, presented at Seventh International Conference on Global Change: Connection to the Arctic. Fairbanks, Alaska, February 19-20. 76-78. PDF
    3. Bhatt, U.S., Walker, D.A., Raynolds, M.K., Comiso, J.C. 2007. The relationship between sea ice variability and arctic tundra on the pan-Arctic, regional, and site scales. Abstract U42C-0612, presented at AGU Fall Meeting. San Francisco, CA, December 10. 88:5.
    4. Cook, B.I., Bonan, G.B., Levis, S., Epstein, H.E. 2007. Dynamic vegetation amplifies climate model response to snow cover changes. Climate Dynamics .
    5. Daanen, R.P., Misra, D., Epstein, H.E. 2007. Active-layer hydrology in non-sorted circle ecosystems of the Arctic tundra. Vadose Zone Journal. 6:694-704. PDF - Permanent link
    6. Epstein, H.E., Yu, Q., Kaplan, J.O., Lischke, H. 2007. Simulating future changes in arctic and subarctic vegetation. Computing in Science and Engineering. 9:(4):12-23. PDF
    7. Jia, G.J., Epstein, H.E., Walker, D.A. 2007. Trends of Vegetation Greenness in the Arctic from 1982-2005. Abstract B21A-0041, presented at AGU Fall Meeting. San Francisco, CA, December 10-14. 88:5. PDF
    8. van Bogaert, R., Walker, D.A., Jia, G.J., Grau, O., Hallinger, M., De Dapper, M., Jonasson, C., Callaghan, T.V. 2007. Recent changes in vegetation. in Richter-Menge, J., Jeffries, M.O., Overland, J.E. (eds.) Arctic Report Card 2007. NOAA. pp. 8. PDF - Arctic Report Card

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  1. 2006
    1. Cook, B.I., Bonan, G.B., Levis, S., Epstein, H.E., Smith, T.M. 2006. Amplification of climate model response to snow cover fraction parameterization through dynamic vegetation. Abstract C21C-1181, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C21C-1181.
    2. Epstein, H.E., Kelley, A.M., Walker, D.A., Jia, G.J., Raynolds, M.K. 2006. Regional-scale vegetation dynamics in patterned-ground ecosystems of arctic tundra. Abstract C51A-0396, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C51A-0396.
    3. Jia, G.J., Epstein, H.E., Walker, D.A. 2006. Spatial heterogeneity of tundra vegetation response to recent temperature changes. Global Change Biology. 12:42-55. PDF - Permanent link
    4. Jia, G.J., Epstein, H.E., Walker, D.A. 2006. Decadal changes of vegetation greenness in the Canadian Arctic. Abstract C51A-0383, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C51A-0383.
    5. Kade, A., Romanovsky, V.E., Walker, D.A. 2006. The N-factor of nonsorted circles along a climate gradient in Arctic Alaska. Permafrost and Periglacial Processes. 17:(4):279-289. PDF
    6. Kuss, P., Kade, A.N., Vonlanthen, C.M., Raynolds, M.K., Matveyeva, N.V., Daniels, F.J.A., Walker, D.A. 2006. Vegetation differentiation of arctic patterned-ground ecosystems. Abstract C44A-05, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C44A-05.
    7. 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. Abstract C51A-0397, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. C51A-0397.
    8. 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. Abstract C51A-0382, presented at AGU Fall Meeting. San Francisco, CA, December 11 - 15. C51A-0382.
    9. Raynolds, M.K., Walker, D.A., Kade, A.N., Vonlanthen, C.M., Vockeroth, S.G., Munger, C.A., Kuss, H.P. 2006. Aboveground Phytomass of Vegetation Communities Along an Arctic Climate Gradient. Abstract C51A-0385, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C51A-0385. PDF
    10. Raynolds, M.K., Walker, D.A., Maier, H.A. 2006. NDVI patterns and phytomass distribution in the circumpolar Arctic. Remote Sensing of Environment. 102:271-281. PDF - Permanent link
    11. Richter-Menge, J., Overland, J., Proshutinsky, A., Romanovsky, V., Bengtsson, L., Brigham, L., Dyurgerov, M., Gascard, J.C., Gerland, S., Graversen, R., Hass, C., Karcher, M., Kuhry, P., Maslanik, J., Melling, H., Maslowski, W., Morison, J., Perovich, D., Przybylak, R., Rachold, V., Rigor, I., Shiklomanov, A., Stroeve, J., Walker, D., Walsh, J. 2006. State of the Arctic Report. NOAA/OAR/PMEL. Seattle, WA. NOAA OAR Special Report(2952). 36 . PDF - State of the Arctic
    12. 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. Abstract C44A-06, presented at AGU Fall Meeting. San Francisco, CA, December 11 - 15. C44A-06.
    13. Romanovsky, V.E., Marchenko, S.S., Grosse, G., Duguay, C.R., Zheleznyak, M.N., Sergeev, D.O. 2006. Monitoring and Modeling of the Northern Eurasia Permafrost Dynamics. Abstract GC21B-04 INVITED, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:52.

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  1. 2005
    1. Afonina, O.M., Raynolds, M.K., Walker, D.A. 2005. On the moss flora of Mould Bay (Prince Patrick Island, Canadian Arctic Archipelago). Arctoa. 14:135-142. PDF
    2. Daanen, R., Misra, D. 2005. Modeling Patterned Ground in the Arctic Tundra. Nordic Hydrology.
    3. 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. Abstract H53C-0477, presented at AGU Fall Meeting. San Francisco, CA, December 5-9.
    4. 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. Abstract B33E-1092, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:B33E-1092.
    5. Jia, G.J., Epstein, H.E., Walker, D.A. 2005. Uneven response of arctic tundra to recent environmental changes. Abstract B33E-1091, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:B33E-1091.
    6. Kade, A., Walker, D.A., Raynolds, M.K. 2005. Plant communities and soils in cryoturbated tundra along a bioclimate gradient in the Low Arctic, Alaska. Phytocoenologia. 35:(4):761-820. PDF - Abstract
    7. 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. Abstract C21C-1135, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C21C-1135.
    8. 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.
    9. Misra, D., Daanen, R. 2005. Visualizing Frost Boils. Challenges - in science and engineering. 13:(1):18-19, 23. PDF
    10. Ping, C.-L., Michaelson, G.J., Kimble, J.M., Walker, D.A. 2005. Soil acidity and exchange properties of cryogenic soils in Arctic Alaska. Journal of Soil Science and Plant Nutrition. 51:(5):649-653. PDF - Abstract
    11. 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. Abstract C24A-05, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A-05.
    12. 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. Abstract C24A-06, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A.
    13. Raynolds, M.K., Walker, D.A., Maier, H.A. 2005. Plant community-level mapping of arctic Alaska based on the Circumpolar Arctic Vegetation Map. Phytocoenologia. 35:(4):821-848. PDF - Abstract
    14. 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. Abstract C24A-03, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A-03.
    15. Zhurbenko, M.P., Laursen, G.A., Walker, D.A. 2005. New and rare lichenicolous fungi and lichens from the North American Arctic. Mycotaxon. 92:201-212. PDF - Abstract
    16. Zhurbenko, M.P., Raynolds, M.K., Walker, D.A., Matveeva, N.V. 2005. Lichens and lichenicolous fungi from the Kolyma delta region, Russian Arctic. Graphis Scripta. 17:27-29. PDF

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  1. 2004
    1. 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. Abstract C43B-0231, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C43B-0231.
    2. Epstein, H.E., Beringer, J., Copass, C., Gould, W., Lloyd, A., Chapin III, F.S., Ping, C.L., Michaelson, G., Rupp, S., Walker, D.A. 2004. The nature of spatial transitions in arctic ecosytems. Journal of Biogeography. 31:1917-1933. PDF - Abstract
    3. Jia, G.J., Epstein, H.E., Walker, D.A. 2004. Controls over intra-seasonal dynamics of AVHRR NDVI for the Arctic tundra in northern Alaska. International Journal of Remote Sensing. 25:(9):1547-1564. PDF
    4. Kelley, A.M., Epstein, H., Walker, D.A. 2004. Role of vegetation and climate in permafrost active layer depth in arctic tundra of Northern Alaska and Canada. Journal of Glaciology and Climatology. 26:269-273. PDF
    5. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2004. A coupled thermo-mechanical model of differential frost heave. Abstract C13B-0282, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C13B-0282.
    6. Ping, C.L., Jorgensen, T., Shur, Y. 2004. Soil cryogenic structures and their implications for land use in Alaska. Journal of Glaciology and Geocryology. 26:(z1).
    7. Ping, C.L., Swanson, D.K., Clark, M.H. 2004. Cryosols in Alaska. in J. M. Kimble (eds.) Permafrost-affected soils. Springer-Verlag. Heidelberg. pp. 727. PDF
    8. Tipenko, G.S., Marchenko, S., Romanovsky, V.E., Groshev, V., Sazonova, T. 2004. Spatially Distributed Model of Permafrost Dynamics in Alaska. Abstract C12A-02, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C12A-02.
    9. Walker, D.A., Epstein, H.E., Gould, W.A., Kelley, A.M., Kade, A.N., Knudson, J.A., Krantz, W.B., Michaleson, G., Peterson, R.A., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Shur, Y.L. 2004. Frost-boil ecosystems: complex interactions between landforms, soils, vegetation, and climate. Permafrost and Periglacial Processes. 15:(2):171-188. PDF - Abstract

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  1. 2003
    1. Comiso, J.C. 2003. Warming trends in the Arctic from clear sky satellite observations. Journal of Climate. 16:3498-3510. PDF - Permanent link
    2. Gould, W.A., Quijano, A., Gonzalez, G., Walker, D.A. 2003. Variation in frost-boil morphology and associated vegetation characteristics along a climatic gradient. Abstract B31C-0311, presented at AGU FAll Meeting. San Francisco, CA, December 8-12. 84:B31C-0311.
    3. Gould, W.A., Walker, D.A., Biesboer, D. 2003. Combining research and education: Bioclimatic Zonation along a Canadian Arctic Transect. Arctic. 56:(1):45-54. PDF - Abstract
    4. Jia, G.J., Epstein, H.E., Walker, D.A. 2003. Greening of arctic Alaska, 1981-2001. Geophysical Research Letters. 30:(20):HLS 3-1 ~ 3-4. PDF - Abstract
    5. Kaplan, J.O., Bigelow, N.H., Prentice, I.C., Harrison, S.P., Bartlein, P.J., Christensen, T.R., Cramer, W., Matveyeva, N.V., McGuire, A.D., Murray, D.F., Razzhivin, V.Y., Smith, B., Walker, D.A., Anderson, P.M., Andreev, A.A., Brubaker, L.B., Edwards, M.E., Lozhkin, L.V. 2003. Climate change and Arctic ecosystems II: Modeling, paleodata-model comparisons, and future projections. Journal of Geophysical Research. 108 (D19). PDF - Abstract
    6. Nicolsky, D.J., Tipenko, G.S., Romanovsky, V.E. 2003. Developing a numerical model of frost boils dynamics. Abstract C21B-0813, presented at AGU Fall Meeting. San Francisco, CA, December 8-12. 84:C21B-0813.
    7. Peterson, R.A., Krantz, W.B. 2003. A mechanism for differential frost heave and its implications for patterned ground formation. Journal of Glaciology. 49:(164):69-80. PDF - Abstract
    8. 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. Abstract Complete set of PDFs, presented at Proceedings of the Eighth International Conference on Permafrost. Lisse, 21-25 July. 2:885-890. PDF
    9. Ping, C.-L., Michaelson, G.J., Overduin, P.P., Stiles, C.A. 2003. Morphogenesis of frost boils in the Galbraith Lake area, arctic Alaska. Permafrost: Proceedings of the Eighth International Conference on Permafrost. Zurich, Switzerland, 21-25 July, 2003. 2:897-900.
    10. Shur, Y.L., Ping, C.L. 2003. The Driving Force of Frost Boils and Hummocks Formation. Abstract C21B-0823, presented at AGU Fall Meeting. San Francisco, CA, December 8-12. 84:C21B-0823.
    11. Walker, D.A., Epstein, H.E., Jia, J.G., Balser, A.W., Copass, C., Edwards, E.J., Gould, W.A., Hollingsworth, J., Knudson, J., Maier, H.A., Moody, A., Raynolds, M.K. 2003. Phytomass, LAI, and NDVI in northern Alaska: Relationships to summer warmth, soil pH, plant functional types, and extrapolation to the circumpolar Arctic. Journal of Geophysical Research - Atmospheres. 108:(d2):8169. PDF - Abstract
    12. Walker, D.A., Jia, G.J., Epstein, H.E., Raynolds, M.K., Chapin , F.S., III, Copass, C.D., Hinzman, L.D., Knudson, J.A., Maier, H.A., Michaelson, G.J., Nelson, F., Ping, C.L., Romanovsky, V.E., Shiklomanov, N. 2003. Vegetation-soil-thaw-depth relationships along a low-arctic bioclimate gradient, Alaska: synthesis of information from the ATLAS studies. Permafrost and Periglacial Processes. 14:(2):103-123. PDF - Abstract

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  1. 2002
    1. Jia, G.J., Epstein, H.E., Walker, D.A. 2002. Spatial characteristics of AVHRR-NDVI along latitudinal transects in northern Alaska. Journal of Vegetation Science. 13:(3):315-326. PDF - Jstor link
    2. Michaelson, G.J., Ping, C.L., Walker, D.A. 2002. Biogeochemistry of Soils Associated with Cryptogamic Crusts on Frost Boils. Abstract B12A-0778, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:F260.
    3. Ping, C.-L., Michaelson, G.J., Kimble, J., Shur, Y.L., Walker, D.A. 2002. Morphogenesis of soils associated with frost boils. Abstract B12A-0775, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:F259. PDF
    4. 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. Abstract B72D-02, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:B72D-02.

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  1. 1998
    1. Nelson, F.E., Hinkel, K.M., Shiklomanov, N.I., Mueller, G.R., Miller, L.L., Walker, D.A. 1998. Active-layer thickness in north central Alaska: Systematic sampling, scale, and spatial autocorrelation. Journal of Geophysical Research. 103:(D22):28963-28973. PDF - Abstract
    2. Reeburgh, W.S., King, J.Y., Regli, S.K., Kling, G.W., Auerbach, N.A., Walker, D.A. 1998. A CH4 emission estimate for the Kuparuk River basin, Alaska. Journal of Geophysical Research. 103:(D22):29,005-29,013. PDF - Abstract

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  1. 1997
    1. Nelson, F.E., Shiklomanov, N.I., Mueller, G.R., Hinkel, K.M., Walker, D.A., Bockheim, J.G. 1997. Estimating active-layer thickness over a large region: Kuparuk River Basin, Alaska, U.S.A.. Arctic, Antarctic, and Alpine Research. 29:(4):367-378. PDF - Jstor link
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