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http://dx.doi.org/10.7850/jkso.2016.21.3.91

Seasonal Variation of Dissolved Methane Concentration and Flux in the Nakdong Estuary  

RYU, JEHEE (Department of Oceanography, Pusan National University)
AN, SOONMO (Department of Oceanography, Pusan National University)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.21, no.3, 2016 , pp. 91-102 More about this Journal
Abstract
The spatio-temporal variations of the dissolved methane concentration were investigated and the methane budget was estimated in the Nakdong Estuary in January, September, and November of 2014. Dissolved methane showed seasonal variation (21~874 nM) with high concentration in summer due to enhanced temperature and fresh water discharge. Decreasing trends of dissolved methane from the river to the estuary were consistent in all seasons showing the main source of the estuarine methane is river discharge. However, the decreasing trends were modified seasonally due to the local sources such as organic-rich sediments in intertidal zone or near the estuarine barrage. Dissolved methane concentration in the Nakdong Estuary was high, compared to other estuaries probably due to the well developed wetland in Nakdong-river system and stagnation effect from barrages and dams. Dominant sink for the Nakdong estuarine methane was outflux into the atmosphere. Relatively long residence time (produced by barrier island and estuarine dam) in the estuary might provide the enough time for the outgassing.
Keywords
Methane Distribution; Methane Flux; Nakdong Estuary; Barrage;
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Times Cited By KSCI : 17  (Citation Analysis)
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