Twenty Mile Aspect Polygon 12 - USTWM012
Additional Site Information

Richard L. Everett, Richard Schellhaas, Don Spurbeck, Pete Ohlson, Dave Keenum


Dating Method: Crossdated

Reference: Everett, R. L., R. Schellhaas, D. Keenum, D. Spurbeck and P. Ohlson.
2000. Fire history in the ponderosa pine/Douglas-fir forests on the east
slope of the Washington Cascades. Forest Ecology and Management
129:207-225. 

Hessl, A. E., McKenzie, D., and Everett, R. 2004. Fire and climatic
variability in the inland Pacific Northwest.  Ecological Applications
14:425-442. 

Comments: This is one of 13 separate aspect polygon subsites that make
up the larger 2,993 ha Twenty Mile site. Each of the 13 subsites have been 
archived separately using the following filenames (with ".fhx" appended 
for the FHX2 data files and ".txt" appended for the accompanying 
documentation files): ustwm001, ustwm002, ustwm003, ustwm004, ustwm005,
ustwm006, ustwm007, ustwm008, ustwm009, ustwm010, ustwm011, ustwm012, ustwm013.

Individual Tree Information: 
(Tree ID, Species, Diameter at Breast Height(cm), Status, Latitude(dd), Longitude(dd))
12,A23,Pinus ponderosa,23,snag,48.691745517,-120.098768494
12,A24,Pinus ponderosa,12,snag,48.691319721,-120.098829816
12,A25,Pinus ponderosa,10,snag,48.691275327,-120.097964511
12,D60,Pinus ponderosa,18,snag,48.686476620,-120.088044068
12,P119,Pinus ponderosa,29,live,48.688836327,-120.076069391
12,P120,Pinus ponderosa,28,cut stump,48.688406848,-120.083080215
12,P121,Pinus ponderosa,29,cut stump,48.688453422,-120.084920838
12,P122,Pinus ponderosa,24,live,48.684705467,-120.081528673
12,P123,Pinus ponderosa,20,live,48.689835042,-120.095436774
12,P124,Pinus ponderosa,18,snag,48.690306764,-120.095947802
12,P125,Pinus ponderosa,26,live,48.690511940,-120.094093264
12,P212,Pinus ponderosa,24,live,48.686487869,-120.087782446
12,P213,Pinus ponderosa,29,live,48.686381990,-120.087683827
12,R126,Pinus ponderosa,15,snag,48.692291614,-120.100624987

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.