Tree height and diameter data from the Aspen FACE Experiment, 1997-2008

This data publication contains annual tree height and diameter measurements from 1997 to 2008 for trembling aspen, sugar maple, and paper birch as part of the Aspen FACE (Free-Air Carbon Dioxide Enrichment) Experiment. This experiment was located on a research farm near Harshaw, Wisconsin (renamed the Rhinelander Experimental Forest in 2015) and consisted of twelve 30 meter diameter rings of aspen, birch and maple trees in which the concentrations of carbon dioxide and tropospheric ozone were controlled. Because there was no confinement, there was no significant change in the natural, ambient environment other than elevating these trace gas concentrations.
The Aspen FACE Experiment was a multidisciplinary study that assessed the effects of increasing tropospheric ozone and carbon dioxide concentrations on the structure and functioning of northern forest ecosystems. The design provided the ability to assess the effects of these gasses alone, and in combination, on many ecosystem attributes, including growth, leaf development, root characteristics, and soil carbon.
Original metadata date was 09/24/2013. Minor metadata updates on 01/08/2015 and 03/04/2015. On 3/30/2016 the bounding coordinates, cross-references, and methodology citations were updated. On 11/15/2016 the metadata were updated to reflect the Harshaw Forestry Research Farm now being designated as Rhinelander Experimental Forest, along with other minor metadata updates. Minor metadata updates on 12/14/2016.