But ammonia shows a different behavior between cruises.
•Very high ammonia concentrations on 103 cruise: > 4 micromolar!
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•Ammonia concentrations decline in upper water column               Consumption?  Nitrification?
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•Deep ammonia concentrations remain at zero.
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•Ammonia decline demonstrated best by integrating ammonia profiles at each station down to depth of zero ammonia: standing stock of ammonia.