Bulletin of Glaciological Research
Online ISSN : 1884-8044
Print ISSN : 1345-3807
ISSN-L : 1345-3807
Concentrations of polycyclic aromatic hydrocarbons in Antarctic snow polluted by research activities using snow mobiles and diesel electric generators(雪上車やディーゼル発電機の使用による調査活動により汚染された南極の雪中の多環芳香族炭化水素類の濃度)
Oanh PHAM Kim(ファンキムオアン)Kazushi NORO(野呂和嗣)Yoshie NABESHIMA(鍋島愛絵)Tatsuya TANIGUCHI(谷口達也)Yusuke FUJII(藤井佑介)Miho ARAI(荒井美穂)Toshimitsu SAKURAI(櫻井俊光)Kenji KAWAMURA(川村賢二)Hideaki MOTOYAMA(本山秀明)Hien TO Thi(トティヒエン)Norimichi TAKENAKA(竹中規訓)
ジャーナル フリー

2019 年 37 巻 p. 23-30


The polycyclic aromatic hydrocarbons (PAHs) in snow were measured in eastern Dronning Maud Land, East Antarctica. The sources of these PAHs were the snow mobiles and diesel electric generators used for scientific research from 29th December 2015 to 4th February 2016. Most of the measured PAH concentrations were low before the research campaign (lower than the detection limit or quantification limit), then increased due to the research activities, and finally decreased to a low level (lower than the quantification limit), probably because of strong blizzard winds. In addition, photolysis of the PAHs in the polluted snow samples under Antarctic conditions was investigated. The snow samples polluted by diesel electric generators were collected before and after irradiation under Antarctic sunlight (11 days); however, a decrease in PAH concentration was not observed. It was concluded that photolysis was not the main sink of the PAHs in Antarctic snow, but the occurrence of blizzard/drifting snow decreased the PAH concentration. In this paper, the preservation method for the snow samples to measure the PAHs correctly was also evaluated. To stabilize the PAHs in snow, hexane had to be added to the snow sample. Even if the snow sample was kept in a freezer, PAHs evaporated without hexane.

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