Seasonal distributions and turnover of reduced trace gases and hydroxylamine in Yaquina Bay, Oregon

Details Seasonal distributions and turnover of reduced trace gases and hydroxylamine in Yaquina Bay, Oregon Seasonal distributions and turnover of reduced trace gases and hydroxylamine in Yaquina Bay, Oregon

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51..697b&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 51, Issue 3, pp.697-706

Physics

6

Scientific paper

The distributions of methane, carbon monoxide, nitrous oxide, and hydrogen along the length of the Yaquina River estuary were examined on six occasions over a year's time during 1983 and 1984. To help evaluate the fluxes of these reduced trace gases, hydroxylamine concentrations and microbial oxidation rates for methane, carbon monoxide, and ammonium were measured along with the trace gases. Methane, introduced primarily from a wastewater discharge, attained high levels of supersaturation, and was removed almost entirely by atmospheric evasion. Carbon monoxide was produced and consumed rapidly by microbes in the estuary, atmospheric evasion contributing little to its overall cycling. Nitrous oxide apparently entered the estuary from fall runoff, upwelled seawater, and sedimentary diffusion, with little relative contribution from aquatic nitrification. Hydroxylamine concentrations correlated positively with ammonium oxidation rates, but whether these processes were one and the same is unknown. Hydrogen production rates apparently were high, as H 2 remained supersaturated at all times in the estuary.

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