Data description: Seward Peninsula Tree Ring Data 

   The file contains standardized tree-ring chronologies from four
treeline sites on the Seward Peninsula.  The four sites are
described in the metadata file (TR_META.CSV).  The tree-ring
chronologies were developed from white spruce (Picea glauca)
trees growing at or near treeline on the Seward Peninsula.
Individual ring-width series were measured to a precision of
0.001 mm.  Series were fit with a line or negative exponential
curve, and measured ring-widths were divided by the line/curve
value to remove any series-length negative trend.  These
standardized series, which all have a mean of 1.0, were then
averaged together to produce the chronology for each site.
Column 1 in the data file contains the calendar year and
Columns 2-5 contain the average standardized ring-width value
at each site for each year.


Associated graphics files:  Bearcreektr.gif (mean ring-width chronology
from Bear Creek site) Banktr.gif (mean ring-width chronology from Bank
site) Drymysterytr.gif (mean ring-width chronology from Dry Mystery
Creek site) Grasshoppertr.gif (mean ring-width chronology from
Grasshopper Hill site)