Hill City - USHIC001
Additional Site Information

Peter M. Brown


Dating Method: Crossdated

Sample Storage Location: Rocky Mountain Tree-Ring Research, Inc. 
Ft. Collins, CO

Reference: Brown, P.M. 2003. Fire, climate, and forest structure in
Black Hills ponderosa pine forests. PhD. Dissertation, Colorado State
University, Ft. Collins, Colorado.

Comments: The "." and "|" symbols were not used in the standard manner as
described in the FHX2 users manual, in that they do not indicate whether or 
not a year is considered a "recorder" year. Rather, the "|" symbol is used 
to indicate that a dated ring was present, while the "." symbol is used
to indicate that no dated ring was present (typically before and after the
age range of the tree as well as between an estimated pith date and the 
earliest ring that was present). 

A JPEG scan of the topographic map used to hand mark the tree locations is 
available at:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/ushic001.jpg

Fire History Graphs: Fire History Graphs illustrate specific years when 
fires occurred and how many trees were scarred. They are available in both 
PDF and PNG formats. The graphs consist of 2 parts, both of which show the 
X axis (time line) at the bottom with the earliest year of information on 
the left and the latest on the right.
The Fire Index Plot is the topmost plot, and shows two variables: sample 
depth (the number of recording trees in each year) as a blue line along 
the left Y axis, compared with the percent trees scarred shown as gray bars 
along the right Y axis.
Below, the Fire Chronology Plot consists of horizontal lines representing
injuries by year on individual sampled trees. Symbols are overlain that 
denote the years containing the dendrochronologically-dated fire scars or
injuries. The sample ID of each tree is displayed to the right of each
line. The Composite Axis below represents the composite information from
all individual series. The symbols used to represent the fire scars or
injuries, and the filters used to determine the composite information,
are shown in the legend.
These graphs were created using the Fire History Analysis and Exploration
System (FHAES). See http://frames.nbii.gov/fhaes/ for more information.