The tree is still alive, and the age given below, 5062 years, is its age as of the growing season of 2012.
Crossdated ages are derived through recognized dendrochronological procedures (e.g., Stokes and Smiley 1968; Swetnam, Thompson, and Sutherland 1985; Schweingruber 1987; Speer 2010).
Tom worked up the cores Schulman collected sometime around 2010, and discovered the tree's age at that time.
For a crossdated age, there should be no question of the age of the portion of the tree sampled, except in any portion of the ring series not confidently crossdated with either other trees at the same site or other sites in the area.
Ring-counted ages are derived by simple ring counts and may contain errors in age due to missing or false rings, suppressed areas, poorly surfaced samples, or other types of tree-ring anomalies (e.g., injuries).
Leiter des Labors für Dendrogeomorphologie; Lehr- und Forschungsrat (LFR) am Labor seit Juli 2000 Gastwissenschafter an der Eidg. (in press): Combining terrestrial laser scanning and exposed roots for erosion rate estimation. [PDF] Schläppy, R., Jomelli, V., Eckert, N., Stoffel, M., Grancher, D., Brunstein, D., Corona, C., Deschatres, M. (2015): Response of Karakoram-Himalayan glaciers to climate variability and climatic change: A regional climate model assessment. Fragnière, J., Bétrisey, S., Cardinaux, L., Stoffel, M., Kozlowski, G. A global analysis of the distribution and conservation status of gymnosperms. [PDF] Ruiz-Villanueva, V., Stoffel, M., Bussi, G., Francés, F., Bréthaut, C. Niedzwiedz, T., Lupikasza, E., Pinskwar, I., Kundzewicz, Z. (2015): Variability of high rainfalls and related synoptic situations causing heavy floods at the northern foothills of the Tatra Mountains. [PDF] Corona, C., Lopez Saez, J., Stoffel, M., Rovéra, G., Edouard, J. (2015): Impacts of more frequent droughts on a relict low-altitude Pinus uncinata stand in the French Alps. (2015): Testing dendrogeomorphic approaches and thresholds to reconstruct snow avalanche activity in the Fagara? (2015): Increased tree establishment in Lithuanian peat bogs detected using a combination of field and remotely sensed approaches. (2014): Station-scale bias correction and uncertainty analysis for the estimation of irrigation water requirements in the Swiss Rhone catchment under climate change. Frey, H., Machguth, H., Huss, M., Huggel, C., Bajracharya, S., Bolch, T., Kulkarni, A., Linsbauer, A., Salzmann, N., Stoffel, M. (2011): Impacts of climatic change on water and natural hazards in the Alps: can current water governance cope with future challenges? 14: 734-743 [PDF] Lopez, J., Corona, C., Stoffel, M., Rovéra, G., Astrade, L., Berger, F. (2011): Estimating flash flood discharge in an ungauged mountain catchment with 2D hydraulic models and dendrogeomorphic paleostage indicators. (2007): Debris-flow activity in the Ritigraben torrent (Valais Alps, Switzerland): will there be less but bigger events in a future greenhouse climate? [PDF] Bollschweiler, M., Stoffel, M., Schneuwly, D. (2007): Dynamics in debris-flow activity on a forested cone – a case study using different dendroecological approaches.
Forschungsanstalt für Wald, Schnee und Landschaft (WSL) in Birmensdorf Vizepräsident der International Tree-Ring Society • Prozesse der Massenumlagerung in Gebirgsregionen (inkl. (in press): Lake outburst and debris flow disaster at Kedarnath, June 2013: Hydrometeorological triggering, and topographic predisposition. [PDF] Ruiz-Villanueva, V., Wyzga, B., Zawiejska, J., Hajdukiewicz, M., Stoffel, M. A., Corona, C., Stoffel, M., Lucia-Vela, A., Bodoque, J. (in press): Can we infer avalanche climate relations using tree-ring data? (2015): Climate change impacts on discharges of the Rhone River in Lyon by the end of the 21st century: model results and implications. [PDF] Šilhán, K., Pánek, T., Hradecký, J., Stoffel (2015): Tree-age control on reconstructed debris-flow frequencies: examples from a regional dendrogeomorphic reconstruction in the Crimean Mountains. (2014): Ice volume estimates for the Himalaya-Karakoram region: evaluating different methods. (2011): Mapping of erosion rates in marly badlands based on anatomical changes in exposed roots and Li DAR data. 25: 970-979 [PDF] Bollschweiler, M., Stoffel, M., Schlaeppy, R. (2008): Unraveling the patterns of late Holocene debris-flow activity on a cone in the central Swiss Alps: chronology, environment and implications for the future. Mc Innes, R., Jakeways, J., Fairbank, H., Mathie, E.