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National Aeronautics and Space Administration

NASA's Arctic-Boreal Vulnerability Experiment

ABoVE

Walker-01 Project Profile
  (updated 09-Sep-2016)
Project Title:Recovery and Archiving of Key Arctic Alaska Vegetation Map and Plot Data for Long-Term Vegetation Analyses
Project Lead: Donald (Skip) Walker, University of Alaska, Fairbanks
Project Funding: 2013 - 2016
NASA (agency representative: Diane Wickland)
Project Type:NASA -- joined ABoVE in 2013
Solicitation:NASA: Pre-ABoVE: Terrestrial Ecology (2012)
Abstract: We are assembling a consistent database that contains map and plot data describing the vegetation of Arctic Alaska. The map data are presented in a hierarchy of scales, from the plot level to the circumpolar arctic. The maps include many geobotanical themes, including vegetation, soils, landform, and geology. We also include vegetation maps based o ... [more]
ABoVE Science Questions
  • Flora and Fauna
ABoVE Science Objectives: Ecosystem Dynamics
  • Permafrost Vulnerability / Resilience
  • Vegetation, hydrology, disturbance interactions
  • Vegetation Greening and Browning
ABoVE Science Objectives: Ecosystem Services
  • Land Management
  • Ecosystem Services Interactions
ABoVE Disciplinary Theme
  • Vegetation Dynamics and Distribution
Participants: Project Lead(s):Co-Investigator(s):Participant(s):

Contact Support to request an email list for your project.

Project URL(s): http://alaskaaga.gina.alaska.edu/
 
Research
Contributions:
Status: Available Date When Available: 2014-12-01
Product Title:  Alaska Arctic Geoecological Atlas Map Archive: Data portal for viewing and downloading Alaska Arctic map data
Description:  The Geoecological Atlas is an archive of maps depicting the vegetation and other environmental characteristics of the Arctic. Many of the maps were created using a geoecological approach, based on the principle that landforms and parent material are the key variables controlling the distribution of arctic soils and plant communities. These maps have a single GIS shapefile, with numerous fields that can be used to create a suite of map themes, including geology, soils and vegetation. The geoecological mapping approach was used for a hierarchy of scales, from mapping individual plants within a 1-square-meter plot to the circumpolar Arctic. The areas with the most detailed mapping include the Toolik Research Station and Prudhoe Bay, Alaska vicinities. The Map Archive also includes vegetation maps produced from image classifications. The data available for download include images of the maps, relevant publications, and the GIS files.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):
Circumpolar Arctic:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=39
Arctic Alaska:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=94
Northern Alaska:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=58
Prudhoe Bay:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=26
Arctic National Wildlife Refuge
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=41
Western Alaska Arctic Transect:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=104
Seward:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=57
Toolik:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=105
Upper Kuparuk:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=61
(additional datasets being added)
Data Server URL(s):

http://geobotanical.portal.gina.alaska.edu
Archived Data Citation:  

Status: Available Date When Available: 2014-12-01
Product Title:  Alaska Arctic Geoecological Atlas Vegetation Plot Archive: Data portal for viewing and downloading Alaska Arctic plot data
Description:  The Arctic Vegetation Archive (AVA) working group of the Conservation of Arctic Flora and Fauna (CAFF), the biodiversity arm of the Arctic Council, is gathering a baseline record of vegetation plot-data within the Arctic, an area of about 7.1 million km2. The goal of the AVA is to unite and harmonize vegetation data from the Arctic tundra biome for use in developing a pan-Arctic vegetation classification and to facilitate research on vegetation and biodiversity change and ecosystem models. The AVA was launched in 2013-14 with two meetings in Krakow, Poland, and Boulder, Colorado, USA. The AVA working group has started work on two prototype databases for Greenland and northern Alaska. Here describe the Alaska AVA prototype. The Alaska Geobotany Center (AGC) is building the AAVA, which will be made accessible to scientists and the public via the Arctic Alaska Geoecological Atlas (AAGA), an on-line resource being developed by the Geographic Information Network of Alaska (GINA). The Alaska AVA utilizes the Turboveg for Windows database program and follows protocols developed for the European Vegetation Archive (EVA) and the Global Index of Vegetation Databases (GIVD). Vegetation plot data will also be deposited in the US vegetation archive, VegBank. We will also follow the data management protocols
established for ABoVE. Datasets will be archived with the ORNL-DAAC and robust use of the ABoVE Science Cloud (ASC) for data and product sharing. A PanArctic Species List (PASL, beta 1.0) provides a standard list of accepted vascular plant, bryophyte, and lichen species names for the Arctic biome. A variety of photos, maps, reports, and other ancillary data are linked to each plot's geographic location. High quality plot data and non-digital legacy datasets that are in danger of being lost have the highest priority for entry into the plot archive. Approximately 5,000 vegetation plots in northern Alaska are being evaluated for inclusion in the Alaska AVA (AAVA) and nearly 1,000 plots have been imported thus far.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):
Vegetation Plot Data:
http://geobotanical.portal.gina.alaska.edu/search?utf8=%E2%9C%93&​search%5Bcollection_ids%5D=37&​search%5Btags%5D=&​limit=30&​search%5Bbbox%5D=&​search%5Bfield%5D=&​search%5Bdirection%5D=&​search%5Bq%5D=&​search%5Bfield%5D=relevance&​limit=30&​search.
Additional datasets being added.
Data Server URL(s):
Vegetation Plot Data:
http://geobotanical.portal.gina.alaska.edu/search?search[collection_ids]=37
Archived Data Citation:  

Status: Archived Date When Available: 11/30/2016
Product Title:  Pre-ABoVE: Arctic Vegetation Plots at Happy Valley, Alaska, 1994
Description:  This data set provides environmental, soil, and vegetation data collected in July 1994 from 56 study plots at the Happy Valley research site, located along the Sagavanirktok River in a glaciated valley of the northern Arctic Foothills of the Brooks Range. Data includes the baseline plot information for vegetation, soils, and site factors for the study plots subjectively located in 17 plant communities that occur in 5 broad habitat types across the glaciated landscape. Specific attributes include: dominant vegetation species, cover, indices, and biomass pools, soil chemistry, physical characteristics, moisture, and organic matter. This product brings together for easy reference all the available information collected from the plots that has been used for the classification, mapping, and analysis of geo-botanical factors in the Happy Valley region and across Alaska.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1354
Data Server URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1354
Archived Data Citation:  Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Happy Valley, Alaska, 1994. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1354

Site(s) of Data Collection:

69.17000,-148.87000; 69.12000,-148.82000

Status: Archived Date When Available: 12/19/2016
Product Title:  Pre-ABoVE: Arctic Vegetation Plots, Frost Boil Sites, North Slope, Alaska, 2000-2006
Description:  This data set describes the environment, soil, and vegetation on nonsorted circles and earth hummocks at seven study sites along a N-S-transect from the Arctic Ocean to the Arctic Foothills based on data collected from 2000 to 2006. The study sites are located along the Dalton Highway, beginning in Prudhoe Bay, on the North Slope of Alaska. These frost-boil features are important landscape components of the arctic tundra. Data include the baseline plot information for vegetation, soils, and site factors for 117 study plots subjectively located in areas of homogeneous, representative vegetation on frost-heave features surrounding stable tundra. Nine community types were identified in three bioclimate subzones. Vegetation was classified according to the Braun-Blanquet system.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

https://daac.ornl.gov/ABOVE/guides/Frost_Boils_Veg_Plots.html
Data Server URL(s):

https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1361
Archived Data Citation:  Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots, Frost Boil Sites, North Slope, Alaska, 2000-2006. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1361

Site(s) of Data Collection:

70.38000,-148.99000; 69.15000,-147.99000

Status: Archived Date When Available: 09/28/2016
Product Title:  Pre-ABoVE: Arctic Vegetation Plots at Toolik Lake, Alaska, 1989
Description:  This data set provides environmental, soil, and vegetation data collected in August 1989 from 81 study plots at the Toolik Lake research site, located in the southern Arctic Foothills of the Brooks Range, Alaska. Data includes the baseline plot information for vegetation, soils, and site factors for the study plots subjectively located in 26 communities and 4 broad habitat types across the glaciated landscape. Specific attributes include: dominant vegetation species, cover, indices, and biomass pools; soil chemistry, physical characteristics, moisture, and organic matter. This product brings together for easy reference all the available information collected from the plots that has been used for the classification, mapping, and analysis of geobotanical factors in the Toolik Lake region and across Alaska.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1333
Data Server URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1333
Archived Data Citation:  Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Toolik Lake, Alaska, 1989. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1333

Site(s) of Data Collection:

68.64000,149.65000; 68.62000,-149.59000

Status: Archived Date When Available: 09/28/2016
Product Title:  Pre-ABoVE: Circumpolar Arctic Vegetation, Geobotanical, Physiographic Data, 1982-2003
Description:  This data set provides the spatial distributions of vegetation types, geobotanical characteristics, and physiographic features for the circumpolar Arctic tundra biome for the period 1982-2003. Specific attributes include dominant vegetation, bioclimate subzones, floristic subprovinces, landscape types, lake coverage, Arctic treeline, elevation, and substrate chemistry data. Vegetation indices, trends, and biomass estimate products for the circumpolar Arctic through 2010 are also provided.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1323
Data Server URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1323
Archived Data Citation:  Walker, D.A., and M.K. Raynolds. 2016. Pre-ABoVE: Circumpolar Arctic Vegetation, Geobotanical, Physiographic Data, 1982-2003. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1323

Site(s) of Data Collection:

90.00000,-180.00000; 55.80000,-180.00000

Status: Archived Date When Available: 11/29/2016
Product Title:  Pre-ABoVE: Arctic Vegetation Plots at Imnavait Creek, Alaska, 1984-1985
Description:  This data set provides environmental, soil, and vegetation data collected during the periods of August 1984 and August-September 1985 from 84 study plots at the Imnavait Creek research site. Imnavait Creek is located in a shallow basin at the foothills of the central Brooks Range. Data includes the baseline plot information for vegetation, soils, and site factors for the study plots subjectively located in 14 plant communities that occur in 19 broad habitat types across the glaciated landscape. Specific attributes include: dominant vegetation species, cover, indices, and biomass pools; soil chemistry, physical characteristics, moisture, and organic matter. This product brings together for easy reference all the available information collected from the plots that has been used for the classification, mapping, and analysis of geo-botanical factors in the Imnavait Creek region and across Alaska.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1356
Data Server URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1356
Archived Data Citation:  Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Imnavait Creek, Alaska, 1984-1985. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1356

Site(s) of Data Collection:

68.62000,-149.32000; 68.60000,-149.23000

Status: Archived Date When Available: 11/29/2016
Product Title:  Pre-ABoVE: Arctic Vegetation Plots at Prudhoe Bay, Alaska, 1973-1980
Description:  This data set provides environmental, soil, and vegetation data collected between 1973 and 1980 from 89 study plots in the Prudhoe Bay region of Alaska. Data includes the baseline plot information for vegetation, soils, and site factors for study plots subjectively located in 43 plant communities and 4 broad habitat types across the glaciated landscape. Specific attributes include: dominant vegetation, species, and cover; soil chemistry, physical characteristics, moisture, and organic matter. This product brings together for easy reference all the available information collected from the plots that has been used for classification, mapping, and analysis of geobotanical factors in the Prudhoe Bay region and across Alaska.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1360
Data Server URL(s):

http://dx.doi.org/10.3334/ORNLDAAC/1360
Archived Data Citation:  Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Prudhoe Bay, Alaska, 1973-1980. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1360

Site(s) of Data Collection:

70.38000,-148.95000; 70.25000,-148.29000

Status: Archived Date When Available: 11/29/2016
Product Title:  Pre-ABoVE: Arctic Alaska Vegetation, Geobotanical, Physiographic Data, 1993-2005
Description:  This data set provides the spatial distributions of vegetation types, geobotanical characteristics, and physiographic features for the Arctic tundra region of Alaska for the period 1993-2005. Specific attributes include dominant vegetation, bioclimate subzones, floristic subprovinces, landscape types, lake coverage, and substrate chemistry. This data set generally includes areas North and West of the forest boundary and excludes areas that have a boreal flora such as the Aleutian Islands and alpine tundra regions south of treeline.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

https://daac.ornl.gov/ABOVE/guides/Alaska_Arctic_Tundra_Veg_Map.html
Data Server URL(s):

https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1353
Archived Data Citation:  Raynolds, M.K., and D.J. Cooper. 2016. Pre-ABoVE: Arctic Alaska Vegetation, Geobotanical, Physiographic Data, 1993-2005. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1353

Site(s) of Data Collection:

71.37000,-173.05000; 57.08000,-138.54000

Status: Archived Date When Available: 01-30-2017
Product Title:  Pre-ABoVE: Land Cover and Ecosystem Map Collection for Northern Alaska
Description:  This data set provides four land cover and ecosystem classification maps for northern Alaska. The maps were produced for several projects and from different data sources including Landsat imagery and existing maps and models, and cover a range of ecosystem and vegetation classes. The data used to derive the maps covered the period 1976-08-04 to 2014-09-01.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

https://daac.ornl.gov/ABOVE/guides/Northern_Alaska_Veg_Maps.html
Data Server URL(s):

https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1359
Archived Data Citation:  Raynolds, M.K., A.L. Breen, and D.A. Walker. 2017. Pre-ABoVE: Land Cover and Ecosystem Map Collection for Northern Alaska. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1359

Site(s) of Data Collection:

71.54000,169.71000; 65.56000,130.00000

Status: Archived Date When Available: 01-12-2017
Product Title:  Pre-ABoVE: Land Cover and Vegetation Map Collection for Seward Peninsula, Alaska
Description:  This data set provides two landcover and vegetation maps for the Seward Peninsula, Alaska. These maps were produced from existing maps, Landsat imagery, and color infrared aerial photography covering the period 1976-06-01 to 1999-09-01.
Map descriptions:

Seward Peninsula Landsat MSS Classification: The map developed in 1999 covers the entire Seward Peninsula west of an arbitrary line drawn between the Elephant Point to the north, and the Koyukuk River Delta to the south at 50-m resolution. The legend includes six vegetation classes, water, barren, snow and ice, and shadows.
Seward Peninsula Range Map: A vegetation map of the entire Seward Peninsula (includes the Baldwin Peninsula attached to the northeast corner) initiated with Landsat imagery in 1976 and enhanced using the color infrared aerial photography through 1983. The map includes 41 vegetation/land cover units.
There are three data files with this data set. The Landsat MSS Classification is in GeoTIFF (*.tif) format, with one layer file (.lyr) which corresponds to the .tif file. The Range Map is in one compressed shapefile (.shp) provided in a .zip file. One companion file, that contains the Range Map information in Google Earth (*.kmz) format, is also provided.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

https://daac.ornl.gov/ABOVE/guides/Seward_Peninsula_Veg_Maps.html
Data Server URL(s):

https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1363
Archived Data Citation:  Raynolds, M.K., C. Thayer-Snyder, and J.D. Swanson. 2017. Pre-ABoVE: Land Cover and Vegetation Map Collection for Seward Peninsula, Alaska. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1363

Site(s) of Data Collection:

66.95000,168.54000; 63.97000,159.19000

Status: Archived Date When Available: Jan 2017
Product Title:  Pre-ABoVE: Arctic Vegetation Plots, Willow Communities, North Slope, Alaska, 1997
Description:  This data set provides environmental, soil, and vegetation data collected in July and August 1997 from 85 study plots in willow shrub communities located along a north-south transect from the Brooks Range to Prudhoe Bay on the North Slope of Alaska. Data includes the baseline plot information for vegetation, soils, and site factors for the study plots subjectively located in three broad habitat types across the glaciated landscape. Specific attributes include: dominant vegetation species, cover, indices, and biomass pools; soil chemistry, physical characteristics, moisture, and organic matter. This product brings together for easy reference all the available information collected from the plots that has been used for the classification, mapping, and analysis of geobotanical factors in the region and across Alaska.
Expected Users:  ABoVE Science Team and other scientists and researchers interested in long-term changes in arctic permafrost, snow, hydrology, biodiversity, ecosystems and communities due to both infrastructure and climate, state and federal policy makers, educators, general public
Metadata URL(s):

https://daac.ornl.gov/ABOVE/guides/Willow_Veg_Plots.html
Data Server URL(s):

https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1368
Archived Data Citation:  Schickhoff, U., D.A. Walker, A.L. Breen, and L.A. Druckenmiller. 2017. Pre-ABoVE: Arctic Vegetation Plots, Willow Communities, North Slope, Alaska, 1997. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1368

Site(s) of Data Collection:

70.18700,-149.85100; 68.03300,-148.08400
  [view google map]
 
Publications: Bratsch, S., Epstein, H., Buchhorn, M., Walker, D. 2016. Differentiating among Four Arctic Tundra Plant Communities at Ivotuk, Alaska Using Field Spectroscopy. Remote Sensing. 8(1), 51. DOI: 10.3390/rs8010051

Walker DA, Raynolds MK, Maier HA, Barbour EM, Neufeld GP (2010) Circumpolar geobotanical mapping: A web-based plant-to-planet approach for vegetation-change analysis in the Arctic (eds Bryn A, Dramstad W, Fjellstad W). Viten fra Skog og landscap, 125-128.

Walker, D. A., Breen, A. L., Druckenmiller, L. A., Wirth, L. W., Fisher, W., Raynolds, M. K., Sibik, J., Walker, M. D., Hennekens, S., Boggs, K., Boucher, T., Buchhorn, M., Bultmann, H., Cooper, D. J., Daniels, F. J., Davidson, S. J., Ebersole, J. J., Elmendorf, S. C., Epstein, H. E., Gould, W. A., Hollister, R. D., Iversen, C. M., Jorgenson, M. T., Kade, A., Lee, M. T., MacKenzie, W. H., Peet, R. K., Peirce, J. L., Schickhoff, U., Sloan, V. L., Talbot, S. S., Tweedie, C. E., Villarreal, S., Webber, P. J., Zona, D. 2016. The Alaska Arctic Vegetation Archive (AVA-AK). Phytocoenologia. 46(2), 221-229. DOI: 10.1127/phyto/2016/0128

Liljedahl, A. K., Boike, J., Daanen, R. P., Fedorov, A. N., Frost, G. V., Grosse, G., Hinzman, L. D., Iijma, Y., Jorgenson, J. C., Matveyeva, N., Necsoiu, M., Raynolds, M. K., Romanovsky, V. E., Schulla, J., Tape, K. D., Walker, D. A., Wilson, C. J., Yabuki, H., Zona, D. 2016. Pan-Arctic ice-wedge degradation in warming permafrost and its influence on tundra hydrology. Nature Geoscience. 9(4), 312-318. DOI: 10.1038/ngeo2674

Raynolds, M. K., Walker, D. A. 2016. Increased wetness confounds Landsat-derived NDVI trends in the central Alaska North Slope region, 1985-2011. Environmental Research Letters. 11(8), 085004. DOI: 10.1088/1748-9326/11/8/085004

Walker DA, Walker MD, Gould WA, Mercado J, Auerbach NA, Maier HA, Neufeld GP (2010) Maps for monitoring changes to vegetation structure and composition: The Toolik and Imnavait Creek grid plots (eds Bryn EBA, Dramstad W, Fjellstad W). Viten fra Skog og landscap, 121-123.

Walker, D.A. 2014. Toward a pan-Arctic vegetation archive and classification: Two recent workshops. IAVS Bulletin, 2014/1, pp. 12-16, [Newsletter] International Association for Vegetation Science. (PDF) http://www.geobotany.uaf.edu/library/pubs/IAVS-Bulletin-2014-issue1-2.pdf

Walker, D. A., Alsos, I. G., Bay, C., Boulanger-Lapointe, N., Breen, A. L., Bultmann, H., Christensen, T., Damgaard, C., Daniels, F. J. A., Hennekens, S., Raynolds, M. K., Le Roux, P. C., Luoto, M., Pellissier, L., Peet, R. K., Schmidt, N. M., Stewart, L., Virtanen, R., Yoccoz, N. G., Wisz, M. S. 2013. Rescuing Valuable Arctic Vegetation Data for Biodiversity Models, Ecosystem Models and a Panarctic Vegetation Classification. ARCTIC. 66(1). DOI: 10.14430/arctic4281

Walker, D.A. (Ed). 2014. Alaska Arctic Vegetation Archive (AVA) Workshop, Boulder, Colorado, USA, October 14-16, 2013. CAFF Proceedings Report 11. Akureyri, Iceland. ISBN: 978-9935-431-29-5 URI: http://hdl.handle.net/11374/241

Walker, D.A. Breen, A.L., Raynolds, M.K. & Walker, M.D. (Ed). 2013. Arctic Vegetation Archive (AVA) Workshop, Krakow, Poland, April 14-16, 2013. CAFF Proceedings Report #10. Akureyri, Iceland. ISBN: 978-9935-431-24-0 URI: http://hdl.handle.net/11374/243

Walker, D. A., Alsos, I. G., Bay, C., Boulanger-Lapointe, N., Breen, A. L., Bultmann, H., Christensen, T., Damgaard, C., Daniels, F. J. A., Hennekens, S., Raynolds, M. K., Le Roux, P. C., Luoto, M., Pellissier, L., Peet, R. K., Schmidt, N. M., Stewart, L., Virtanen, R., Yoccoz, N. G., Wisz, M. S. 2013. Rescuing Valuable Arctic Vegetation Data for Biodiversity Models, Ecosystem Models and a Panarctic Vegetation Classification. ARCTIC. 66(1). DOI: 10.14430/arctic4281

Walker, D. A., Daniels, F. J. A., Alsos, I., Bhatt, U. S., Breen, A. L., Buchhorn, M., Bultmann, H., Druckenmiller, L. A., Edwards, M. E., Ehrich, D., Epstein, H. E., Gould, W. A., Ims, R. A., Meltofte, H., Raynolds, M. K., Sibik, J., Talbot, S. S., Webber, P. J. 2016. Circumpolar Arctic vegetation: a hierarchic review and roadmap toward an internationally consistent approach to survey, archive and classify tundra plot data. Environmental Research Letters. 11(5), 055005. DOI: 10.1088/1748-9326/11/5/055005

Walker, D. A., Breen, A. L., Druckenmiller, L. A., Wirth, L. W., Fisher, W., Raynolds, M. K., Sibik, J., Walker, M. D., Hennekens, S., Boggs, K., Boucher, T., Buchhorn, M., Bultmann, H., Cooper, D. J., Daniels, F. J., Davidson, S. J., Ebersole, J. J., Elmendorf, S. C., Epstein, H. E., Gould, W. A., Hollister, R. D., Iversen, C. M., Jorgenson, M. T., Kade, A., Lee, M. T., MacKenzie, W. H., Peet, R. K., Peirce, J. L., Schickhoff, U., Sloan, V. L., Talbot, S. S., Tweedie, C. E., Villarreal, S., Webber, P. J., Zona, D. 2016. The Alaska Arctic Vegetation Archive (AVA-AK). Phytocoenologia. 46(2), 221-229. DOI: 10.1127/phyto/2016/0128

Archived Data Citations: Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Happy Valley, Alaska, 1994. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1354

Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Imnavait Creek, Alaska, 1984-1985. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1356

Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Prudhoe Bay, Alaska, 1973-1980. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1360

Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots at Toolik Lake, Alaska, 1989. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1333

Walker, D.A., and M.K. Raynolds. 2016. Pre-ABoVE: Circumpolar Arctic Vegetation, Geobotanical, Physiographic Data, 1982-2003. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1323

Raynolds, M.K., A.L. Breen, and D.A. Walker. 2017. Pre-ABoVE: Land Cover and Ecosystem Map Collection for Northern Alaska. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1359

Raynolds, M.K., C. Thayer-Snyder, and J.D. Swanson. 2017. Pre-ABoVE: Land Cover and Vegetation Map Collection for Seward Peninsula, Alaska. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1363

Raynolds, M.K., and D.J. Cooper. 2016. Pre-ABoVE: Arctic Alaska Vegetation, Geobotanical, Physiographic Data, 1993-2005. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1353

Walker, D.A. 2016. Pre-ABoVE: Arctic Vegetation Plots, Frost Boil Sites, North Slope, Alaska, 2000-2006. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1361

Schickhoff, U., D.A. Walker, A.L. Breen, and L.A. Druckenmiller. 2017. Pre-ABoVE: Arctic Vegetation Plots, Willow Communities, North Slope, Alaska, 1997. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1368

2015 NASA Carbon Cycle & Ecosystems Joint Science Workshop Poster(s)
  • Establishing biomass-spectra relationships at Ivotuk, Alaska using LASSO regression   --   (Sara Bratsch, Howard Epstein, Heather Landes)   [abstract]
5th NACP All-Investigators Meeting Posters (2015):
  • Using discriminant analysis to examine hyperspectral differences among four tundra vegetation communities at Ivotuk, Alaska -- (Bratsch N Sara, Howard E Epstein) [abstract]

This project also has a Project Profile for the following program(s):


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