1. Carbon Allocation In Dry and Wet Years
A Simulation Using BIOME-BGC for Excel
Joshua Gray 9/2007

2. Model Initialization
Meteorological Data for Missoula, MT from
Tree specific parameters typical of evergreen needle leaf stands
1m deep loamy soil: 30% sand, 50% silt, 20% clay

3. 1976 and 1980 Precipitation 1976: 24.1cm total precipitation

4. GPP in Wet and Dry Years

6. 1980 Leaf C values higher overall
We observe the potential decreasing as additional Leaf C is generated
Rate of Leaf C addition decreases with decreasing soil water potential
Amount of Leaf C decreases when we reach the point of stomatal closure

8. Ratio of NPP/GPP is essentially constant: 1976: 50% and 1980: 57% (intercept is forced through the origin)
This is higher than reported in the text (Oregon Transect, Harvard Forest, Australia, New Zealand all about 46%)