Nitrate, phosphate, and silica increased 20-40% in the
upper water column between cruises.
Ammonia declined strongly (~60%) in the upper water
column between cruises.
Very high standing stock of ammonia in Marguerite
possibly drifted to southwest during cruise 103
declined ~3-fold between cruises
Nutrient remineralization (nitrification) possible but
difficult to explain quantitatively
No attempt to correct for circulation effects