Greening of the Arctic: An IPY Initiative
Posters:
Scroll down to view talks
Select image or title to view talk
Toolik Grid Plots: Baseline canopy height and species composition in 1990
Walker DA
Explanation: Permanent 1 x 1-m plots were sampled in 1990 to establish a baseline for monitoring changes to the vegetation at 85 grid points of the 1.2 x 1.1-km Toolik Lake Grid (see location map, D.A. Walker and Maier 2008). The grid points are spaced 100 meters apart. Each 1-m2 plot was located in a random direction from the grid stake within 2 m of the grid point stake and in the same vegetation type as at the stake. An aluminum point-quadrat frame was used for the sampling (Figure 1). A methodology developed for the International Tundra Experiment (ITEX) permits near-exact repositioning of the frame for long-term monitoring (M.D.Walker 1996). The plots are being monitored every 6 years using the same methods.
Mapping and Monitoring of Nordic Vegetation and Landscapes, Hveragerdi, Iceland, 16-18 September 2009
Citation: Walker, D. A., M. D. Walker, N. A. Auerbach, H. A. Maier, and G. P. Neufeld. 2009. Toolik Lake Grid Plots: Baseline canopy heights and species composition in 1990. Poster presented at the Mapping and Monitoring of Nordic Vegetation and Landscapes, 16-18 September 2009, Hveragerdi, Iceland.
Simulating soil organic nitrogen and grazing effects on arctic tundra vegetation dynamics on the Yamal Peninsula, Russia
Yu Q, Epstein HE, Walker DA
Land Cover, Land Use Change Spring Science Team M, Bethesda, MD, 31 March - 2 April 2009Decadal changes of phenological patterns over Arctic tundra biome
Jia GJ, Epstein HE, Walker DA, Hu Y, Wang H
Land Cover, Land Use Change Spring Science Team M, Bethesda, MD, 31 March - 2 April 2009
Spatiotemporal trends in tree and tall shrub cover in the circumpolar Arctic: evidence from repeat ground photographs and 1960s satellite imagery
Frost GV, Epstein HE, Jorgenson MT
Land Cover, Land Use Change Spring Science Team M, Bethesda, MD, 31 March - 2 April 2009Biomass-NDVI-LAI patterns and relationships on the Yamal Peninsula, Russia
Epstein, HE, Walker DA, Kaarlejärvi E, Kuss P, Moskalenko NG, Orekhov PT, Gubarkov AA, Khomutov AV, Leibman MO, Matyshak GV
Land Cover, Land Use Change Spring Science Team Meeting, Bethesda, MD, 31 March - 2 April 2009Greening of Arctic tundra is linked to warming summer land temperatures and sea-ice declines
Bhatt US, Walker DA, Raynolds MK, Comiso JC, Epstein HE, Jia GJ, Gens R
Land Cover, Land Use Change Spring Science Team M, Bethesda, MD, 31 March - 2 April 2009Vegetation greenness on the Yamal Peninsula, Russia: Disturbance-climate-change interactions
Walker DA, Leibman MO, Epstein HE, Forbes BC, Bhatt US, Raynolds MK, Comiso JC, Gubarkov AA, Khomutov AV, Jia GJ, Kaarlejarvi E, Kaplan JO, Kumpula T, Kuss P, Matyshak G, Orekhov P, Moskalenko NG, Romanovsky V, Ukralentseva NK, Yu Q
Land Cover, Land Use Change Spring Science Team Meeting, Bethesda, MD, 31 March - 2 April 2009Modelling the distribution of circumpolar arctic vegetation
Raynolds MK, Walker DA, Verbyla D, Huettman F
Land Cover, Land Use Change Spring Science Team Meeting, Bethesda, MD, 31 March - 2 April 2009
Decadal changes of phenological patterns over Arctic tundra biome
Jia GJ, Epstein HE, Walker DA, and Wang H
AGU Fall Meeting, San Francisco, CA, Dec. 15-19, 2008
Abstract C21C-0559
Citation: (3) Jia, G.J., H. E. Espstein, D. A. Walker, and H. Wang. 2008. Decadal changes of phenological patterns over arctic tundra biome. Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract C21C-0559.
Talks
Select image or title to view talk
Circumpolar Geobotanical Mapping: A web-based plant-to-planet approach for vegetation change analysis in the Arctic
Walker DA
Themes of Talk: Review hierarchy of maps in the Toolik-Arctic Geobtanical Atlas; application to questions related to the “Greening of the Arctic” project; some features of the Toolik-Arctic Geobotanical Atlas web site.
Mapping and Monitoring of Nordic Vegetation and Landscapes, Hveragerdi, Iceland, 16-18 September 2009
Arctic land is greening, says scientist
Anon.
Program #5733, Earth & Sky Radio Series, March 5, 2009
The Greening of the Arctic IPY Project
Walker DA, Bhatt US, Epstein HE
AGU Fall Meeting, San Francisco, CA, Dec. 15-19, 2008
Abstract U23F-05
Citation: (1) Walker, D. A., U. S. Bhatt, and H. E. Epstein. 2008. The Greening of the Arctic IPY Project. Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract U23F-05. INVITED.
Cumulative effects of rapid climate and land-use changes on the Yamal Peninsula, Russia
Walker DA, Leibman MO, Forbes BC, and Epstein HE
AGU Fall Meeting, San Francisco, CA, Dec. 15-19, 2008
Abstract GC52A-07
Citation: (2) Walker, D. A., M. O. Leibman, B. C. Forbes, and H. E. Epstein. 2008. Cumulative effects of rapid climate and land-use changes on the Yamal Peninsula, Russia. Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract GC52A-07.