Abstract: Applying Relaxed Eddy Accumulation to Measure CH4 Gas Exchange Rate Between the Sea Surface and the Atmosphere. (ASA, CSSA and SSSA International Annual Meetings)

152-10 Applying Relaxed Eddy Accumulation to Measure CH4 Gas Exchange Rate Between the Sea Surface and the Atmosphere.

Poster Number 1113

See more from this Division: SSSA Division: Soil Chemistry
See more from this Session: Climate Change Impacts on Soils: Understanding and Estimating the Extent and Rates of Reactions, Processes, Interactions and Feedbacks

Monday, November 3, 2014

Long Beach Convention Center, Exhibit Hall ABC

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Kosuke Noborio, Meiji University, Kawasaki-shi, Kanagawa, JAPAN, Shujiro Komiya, 1-1-1 Higashi-Mita, Tama-ku, Meiji University, Kawasaki, Kanagawa, JAPAN, Fumiyashi Kondo, National Institutes for Environmental Studies, Tsukuba, Japan, Shinsuke Aoki, Land Resource Laboratory, Meiji University, Kawasaki, Kanagawa, JAPAN, Mitsuo Uematsu, The University of Tokyo, Kashiwa, Japan and Ryo Matsumoto, Meiji University, Tokyo, Japan

Poster Presentation

2014 SSSA_poster_Noborio.pdf (23.3 MB)

Methane (CH₄) gas exchange rates were measured between the atmosphere and the sea surface using the relaxed eddy accumulation technique. Vertical wind directions and speed were measured at the rate of 10 Hz with a 3-D ultrasonic anemometer located on the compass deck of a vessel. Wind direction measured was corrected using a 3-D inclinometer and angular accelerometer. Air sampled was separately stored in two bins according to the wind direction. The concentration of CH4 gas in each bin was measured with a gas analyzer every 3 min. Diurnal changes in CH₄ flux were found at the sea surface.

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