Estimativa do fluxo de amônia NA interface ar-mar na baía de guanabara - Estudo preliminar

Abstract

In the begining of April 2004, concentrations of NxH (NH 3 + NH4+) were measured in surface waters of the Guanabara Bay. Concentrations varied from 2 to 143 μmol L-1. Ammonia exchange at the air-sea interface was quantified using a numerical model. No measurement of NH3 concentration in air (cair) was performed. Thus, calculations of NH3 flux were based on the assumptions of cair = 1 and 5 μg m-3. Fluxes were predominantly from the water to the atmosphere and varied from -20 to almost 3500 μg N m-2 h-1.