Carbon dioxide and ozone data from the Aspen FACE Experiment, 1998-2009, and Phase II Experiment, 2010

This data publication contains mean hourly gas measurements for 1998 to 2009, and 2010 for seasonal fumigation treatments as part of the Aspen FACE (Free-Air Carbon Dioxide Enrichment) and Phase II Experiment. These experiments were 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 (CO2) and tropospheric ozone (O3) 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. The Phase II Experiment was a study that assessed the effects of climate change on regeneration response following complete harvest of aspen, birch and maple forest communities.
Original metadata date was 01/29/2015. Minor metadata updates on 03/29/2016 include updates to the bounding coordinates, cross-references and methodology citations. 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. Additional minor metadata updates on 12/15/2016.