Ivotuk Leaf Area index measurements.
Investigators: Catharine Copass, Erika Edwards, Jason Beringer
PI: Terry Chapin

LAI measurements were taken at approximately peak biomass at 
the Ivotuk grid sites in 1998. The measurements
were taken with the Li-cor LAI 2000 Canopy Analyzer, using 
the 90 degree field of view restrictor to mask the operator.
Each grid point measurements reflects the average (as 
calculated by the Li-cor) of four ground measurments, 
one in each ordinal direction from the pin flag marking the 
grid point.

The alphanumerics reflect the grid points at the Ivotuk grids, 
which use the ATLAS grid system of rows A-K and columns 1-11, 
enclosing a 100m grid. Grid points are therefore 10 m apart.

The grids were named and numbered, which has led to some 
confusion. MAT (moist acidic site) = site 1. MNT (moist non 
acidic tundra)= site 3.  Moss (moss rich acidic tundra) = site 4. 
Shrub (dwarf birch shrub tundra) = site 2.

The measurements were taken on the following days:
MAT 8/1/98
MNT 7/30/98
Shrub 7/6/98
Moss 8/3/98

Missing data is given -9999