Fluxos de óxido nitroso na interface ar-mar na Baía de Guanabara Nitrous oxide fluxes at the air-sea interface in Guanabara Bay

Química Nova

关键词: nitrous oxide;    air-sea exchange;    Guanabara Bay;   

DOI  :  10.1590/S0100-40422008000700003

来源: DOAJ

【 摘 要 】

In Surface water concentrations of N2O were measured at 37 stations in Guanabara Bay and fluxes estimated across the air-sea interface. Concentrations averaged 8.2 ± 2.2 nmol L-1 and 90% of the stations showed supersaturation averaging 33%. N2O fluxes were estimated using a two-film model which is given by the product of the concentration difference across the film and the gas transfer coefficient (k w). Two parametrizations of k w were used which provided average fluxes of 0.3 and 3.0 µg N m-2 h-1. Flux measurements using floating chambers (not reported here) seem to agree with the upper limit of these estimates.

【 授权许可】

Unknown