Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-335

BOREAS TE-08 Aspen Bark Chemistry Data

ABSTRACT: The BOREAS TE-08 team collected pigment density data from aspen bark and leaves from four sites within the BOREAS SSA from 24-May-1994 to 16-Jun-1994 (IFC-1), 19-Jul-1994 to 08-Aug-1994 (IFC 2), and 30-Aug-1994 to 19-Sep-1994 (IFC-3). One to nine trees from each site were sampled during the three IFCs. Each tree was sampled in five different locations for bark pigment properties: basal stem section, which was any bark sample taken below one-half the tree height; upper stem section, which was any bark sample taken from the main stem above one-half the tree height; bark taken from branches up to 3 years old; a 2-year old branch segment; and a 1-year old branch segment. Additionally, a limited number of leaves were collected. Bark samples were removed from the stem of the tree, placed in ziplock bags, and transported to UNH, where they were processed and analyzed by a spectrophotometer. In each data file, samples are identified by Site, date, Tree#, and Sample Location (see 1st paragraph above). Pigment density values are normalized to mg/m2. Density values for the following pigments are provided: Chl a, Chl b, Total Chl (Chl a+b), Carotenoids, Chl a to b ratio, and the Total Chl to carotenoids ratio.

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=335

Identified by : BOREAS_TE08BCHM

This dataset was released on January 01, 1999.

The time range for this dataset is May 24, 1994 to September 08, 1994.

The spatial range for this dataset is 53.63° to 53.71° latitude, and -106.2° to -105.32° longitude. map (center)

DOI : 10.3334/ORNLDAAC/335
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_335 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_335 (ornl lexicon)