•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 Bay
–~500
µmol/m2
–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
–