Copass_Council_LeafAreaI__00_readme

Data set name: Copass_Council_LeafArea_00.xls
Worksheets: LAI, Summary

Investigator Names:
Catharine Copass
Terry Chapin
A. Dave McGuire
Jason Beringer


Contact for data questions:
Catharine Copass
ftcdc@uaf.edu
Dept. Biology and Wildlife
University of Alaska Fairbanks 99775-6100
907.474.7929

Grant: OPP 9732126

Data Set Overview:
These are point based measurements of Leaf Area Index (LAI) from the Council    
Grids. The LAI data were collected with the Licor LAI-2000 Canopy Analyzer on 
multiple dates, beginning before leaf out in early June, including approximately 
peak season biomass during the 2000 field season. Averages and standard 
deviations have been calculated.The location and name of the grids is as follows:
C1 Forest N64deg54.456' W163deg40.469' 
C2 Tundra N64deg50.499' W163deg41.591'
C6 Low Shrub N64deg53.47' W163deg38.61'
C3 Tall Shrub N64deg56.141' W164deg44.142'
C4 Woodland N64deg53.997' W163deg39.863'

Instrument Description:
The Licor LAI-2000 Canopy Analyzer uses 


Data Collection:
We used the 90 degree field of view restrictor. Best effort was made to take 
measurements under stable, cloudy conditions, with the operator's back to the sun. 
We processed the data using the LAI software


Data Format:
The data is in an excel file, with cases indicated by the grid point number and 
variables listed by site number and date of sampling.

Data Remarks:
It is unlikely that zero values represent true zero leaf index, as the sensor head 
is approximately 1cm. Prostrate vegetation, moss and lichen are underrepresented 
in this method.