Estimativa do fluxo de amônia na interface ar-mar na Baía de Guanabara: estudo preliminar

Química Nova

Giselle Parno Guimarães¹  William Zamboni De Mello¹ 

[1] ,Universidade Federal Fluminense Instituto de Química Departamento de GeoquímicaNiterói RJ

关键词: ammonia;    air-sea exchange;    Guanabara Bay;   

DOI  :  10.1590/S0100-40422006000100012

来源: SciELO

【 摘 要 】

In the begining of April 2004, concentrations of NHx (NH3 + NH4+) were measured in surface waters of the Guanabara Bay. Concentrations varied from 2 to 143 mmol L-1. Ammonia exchange at the air-sea interface was quantified using a numerical model. No measurement of NH3 concentration in air (c air) was performed. Thus, calculations of NH3 flux were based on the assumptions of c air = 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.

【 授权许可】

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