Japan Geoscience Union Meeting 2016

Presentation information


Symbol A (Atmospheric and Hydrospheric Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS12] Atmospheric Chemistry

Wed. May 25, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Hitoshi Irie(Center for Environmental Remote Sensing, Chiba University), Toshinobu Machida(National Institute for Environmental Studies), Hiroshi Tanimoto(National Institute for Environmental Studies), Yoko Iwamoto(Faculty of Science Division I, Tokyo University of Science)

5:15 PM - 6:30 PM

[AAS12-P07] Temporal variation of the total column of ethane observed with FTIR at Tsukuba

*Isao Murata1, Hideaki Nakajima2,3, Isamu Morino2 (1.Graduate School of Environmental Studies, Tohoku University, 2.National Institute for Environmental Studies, 3.Council for Science, Technology and Innovation, Cabinet Office, Government of Japan)

Keywords:FTIR, Greenhouse Gas, ethane

The total columns of C2H6 have been observed with a high-resolution Fourier transform spectrometer at Tsukuba, Japan since 1999. SFIT2 spectral fitting program was used to derive the total column from 2 spectral windows in 3 micrometer region.
C2H6 is the second major hydrocarbon and contribute to global warming and air pollution indirectly. The main sources are anthropogenic ones such as natural gas, biofuel, and biomass burning. But the measurements at Jungfraujoch [Franco et al., 2015] show that the emissions may be underestimated from the comparison with simulation results.
Preliminary retrieved total column of 1.5 – 3.5 x 1016 molecule/cm-2 at Tsukuba in 2012 is consistent with that of previous study [Zhao et al., 2002] at Hokkaido and is larger than the simulation result. The seasonal variation which shows maximum in spring and minimum in autumn is also consistent with those of previous studies. This is due to the increase of the destruction by the reaction with OH in summer.