@article{oai:nipr.repo.nii.ac.jp:00010037,
 author = {Koga, Seizi and Nomura, Daiki and Wada, Makoto and Koga, Seizi and Nomura, Daiki and Wada, Makoto},
 issue = {3},
 journal = {Polar science, Polar science},
 month = {Sep},
 note = {Atmospheric dimethylsulfide (DMS) was measured to investigate the variation in its concentration over sea ice free oceans and sea ice regions of the Southern Ocean, using a proton transfer reaction-mass spectrometer (PTR-MS) on board the icebreaker Shirase from 1 December 2009 to 16 March 2010. In general, DMS concentrations over sea ice regions were very low compared with those over the sea ice free ocean. However, abrupt increases in DMS concentrations occurred over sea ice regions while the ship was moving and crushing the sea ice. Undoubtedly, the elevated DMS concentrations were caused by large DMS emissions from gaps in the ice made by the ship. During the period when Shirase had anchored off Syowa Station (69°00.4′S, 39°35.3′E), Antarctica, DMS concentrations were not detected. At this time, the surrounding sea of East Ongul island, on which Syowa Station is located, was completely covered with multi-year fast ice. Sea ice probably inhibits DMS emission from the ocean to the atmosphere. In addition, there was no evidence that chlorophyll a concentration in the sea water or wind speed above the sea surface affect atmospheric DMS concentrations over the sea ice free ocean regions., 2009年12月から2010年3月まで、南大洋の開水域と海氷域における大気中の硫化ジメチル（DMS）濃度を砕氷艦「しらせ」に設置した陽子移動反応質量分析計により観測した。海氷域でのDMS濃度は、開水域と比較して非常に低濃度であったが、砕氷航行中にだけ急激な濃度上昇が観測された。これは、砕氷によって生じた海氷の隙間から、大量のDMSが大気に放出されたことを示している。「しらせ」が昭和基地沖に接岸している間、DMSは不検出であった。この時期、昭和基地がある東オングル島の周辺海域は多年氷に完全に覆われていた。海氷は海洋から大気へのDMS放出を妨げるのであろう。また、開水域上のDMS濃度は、海水中のクロロフィルa濃度や海上の風速の変動とは無関係であった。},
 pages = {306--313},
 title = {Variation of dimethylsulfide mixing ratio over the Southern Ocean from 36°S to 70°S},
 volume = {8},
 year = {2014}
}