WEKO3
アイテム
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Seasonal variations and size distribution of sea-salt particles were compared between coastal and inland stations. Seasonal variations of the concentrations of sea-salt particles showed a minimum in the austral summer and higher during the winter at both stations due to strong winds and long-range transport. Sea-salt particles were mostly distributed in fine (D_p: 0.2-2.0 μm) and ultra-fine (D_p\u003c0.2 μm) modes at Syowa Station. Particulate Cl^- and Br^- are liberated preferentially from sea-salt particles through the heterogeneous reactions at Syowa and Dome Fuji Stations in the summer. The molar ratio of Cl^- Na^+ and Br^- Na^+ at Syowa Station decreased to ca. 0.5 and ~0, respectively, in summer. Fewer sea-salt particles were modified at Syowa Station during the winter, whereas sea-salt particles were modified through the year at Dome Fuji Station. In particular, sea-salt particles were modified with NO_3^- and its precursors at Dome Fuji Station during the winter. The concentrations of gaseous inorganic chlorine species (mostly HCl) and bromine species at Syowa Station were 0.2-9.4 nmol m^\u003c-3\u003e and below the detection limit (BDL)-1.5 nmol m^\u003c-3\u003e, respectively. Sea-salt fractionation (SO_4^\u003c2-\u003e depletion) due to Mirabilite formation was identified not only at Syowa Station but also at Dome Fuji Station. Seasonal variation of molar ratio of Mg^\u003c2+\u003e Na^+ showed higher ratios at lower temperature. The range and temperature dependence of Mg^\u003c2+\u003e Na^+ strongly suggested that other sea-salt fractionation (e.g., formation of gypsum and hydrohalite) occurred in the Antarctic coasts in addition to Mirabilite formation. 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南極域での海塩粒子 -大気中の変質過程と海氷・積雪中の組成分別過程-
https://doi.org/10.15094/00009579
https://doi.org/10.15094/000095796990c8b5-0674-467a-9353-8848dad36966
名前 / ファイル | ライセンス | アクション |
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KJ00007139079 (10.0 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-12-28 | |||||
タイトル | ||||||
タイトル | 南極域での海塩粒子 -大気中の変質過程と海氷・積雪中の組成分別過程- | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Chemistry of sea-salt particles and sea-salt fractionation in Antarctic region | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00009579 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
論文名よみ | ||||||
その他のタイトル | ナンキョクイキ デノ カイエン リュウシ タイキチュウ ノ ヘンシツ カテイ ト カイヒョウ セキセツ チュウ ノ ソセイ ブンベツ カテイ | |||||
著者名(日) |
原, 圭一郎
× 原, 圭一郎× 長田, 和雄× 林, 政彦× 矢吹, 正教× 橋田, 元× 山内, 恭 |
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著者名(英) |
Hara, Keiichiro
× Hara, Keiichiro× Osada, Kazuo× Hayashi, Masahiko× Yabuki, Masanori× Hashida, Gen× Yamanouchi, Takashi |
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著者所属(日) | ||||||
情報・システム研究機構国立極地研究所 | ||||||
著者所属(日) | ||||||
名古屋大学大学院環境学研究科 | ||||||
著者所属(日) | ||||||
福岡大学理学部地球圏科学科 | ||||||
著者所属(日) | ||||||
情報・システム研究機構国立極地研究所 | ||||||
著者所属(日) | ||||||
情報・システム研究機構国立極地研究所 | ||||||
著者所属(日) | ||||||
情報・システム研究機構国立極地研究所 | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518. | ||||||
著者所属(英) | ||||||
en | ||||||
Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601. | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Earth System Science, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180. | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518. | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518. | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518. | ||||||
抄録(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 昭和基地(1997-1998,2003-2006; JARE-38-39,JARE-44-47)とドームふじ基地(1997,JARE-38)で,エアロゾル成分と酸性ガスの連続観測を実施した.海塩粒子濃度の季節変化はいずれの基地でも夏季に極小を示し,冬季に濃度が高くなる変化を示した.冬季に海塩粒子濃度が高いのは,低気圧接近に伴う強風による海塩粒子の発生と長距離輸送に起因しているのだろう.昭和基地では,海塩粒子のほとんどが微小粒子域(D_p: 0.2-2.0 μm),超微小粒子域(D_p<0.2 μm)に分布していた.海塩粒子中のCl^- とBr^- は不均一反応により損失しやすく,夏季にCl^- とBr^- の損失が顕著だった.昭和基地で観測されたCl^- Na^+ とBrv Na^+ の各濃度比は,夏季にはそれぞれ約0.5,0まで減少していた.昭和基地では,冬季に海塩粒子はほとんど変質(Cl^- ロス)していなかったが,ドームふじ基地では年間を通じて海塩粒子からのCl^- 損失が確認された.冬季のドームふじ基地では,NO_3^- とその前駆物質により海塩粒子の変質が進行していた.昭和基地でのガス状の無機塩素化合物(主成分はHCl)と臭素化合物(主成分はHBr)の濃度は,それぞれ0.2-9.4 nmol m^<-3>,検出下限以下~ 1.5 nmol m^<-3> だった.海塩組成分別によるSO_4^<2-> 損失は昭和基地だけでなく,内陸のドームふじ基地でも確認された.Mg^<2+> Na^+ の濃度比の季節変化は,低温下で濃度比が高くなる傾向を示した.濃度比の値とその温度依存性から,Mirabilite形成以外の海塩組成分別過程(例えばGypsum,Hydrohaliteの形成)も南極沿岸域で起きていることが示唆される.ドームふじ基地と昭和基地でのMg^<2+> Na^+ 比の季節変化や値が大きく異なっていたことから,内陸部でも積雪表面で海塩組成分別が進行し,風により大気中へ海塩粒子が再飛散している可能性が考えられる. | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Observations of aerosol constituents and acidic gases were carried out at Syowa Station (1997-1998 and 2003-2006; JARE-38~ 39, and JARE-44~ 47) and Dome Fuji Station (1997, JARE-38). Seasonal variations and size distribution of sea-salt particles were compared between coastal and inland stations. Seasonal variations of the concentrations of sea-salt particles showed a minimum in the austral summer and higher during the winter at both stations due to strong winds and long-range transport. Sea-salt particles were mostly distributed in fine (D_p: 0.2-2.0 μm) and ultra-fine (D_p<0.2 μm) modes at Syowa Station. Particulate Cl^- and Br^- are liberated preferentially from sea-salt particles through the heterogeneous reactions at Syowa and Dome Fuji Stations in the summer. The molar ratio of Cl^- Na^+ and Br^- Na^+ at Syowa Station decreased to ca. 0.5 and ~0, respectively, in summer. Fewer sea-salt particles were modified at Syowa Station during the winter, whereas sea-salt particles were modified through the year at Dome Fuji Station. In particular, sea-salt particles were modified with NO_3^- and its precursors at Dome Fuji Station during the winter. The concentrations of gaseous inorganic chlorine species (mostly HCl) and bromine species at Syowa Station were 0.2-9.4 nmol m^<-3> and below the detection limit (BDL)-1.5 nmol m^<-3>, respectively. Sea-salt fractionation (SO_4^<2-> depletion) due to Mirabilite formation was identified not only at Syowa Station but also at Dome Fuji Station. Seasonal variation of molar ratio of Mg^<2+> Na^+ showed higher ratios at lower temperature. The range and temperature dependence of Mg^<2+> Na^+ strongly suggested that other sea-salt fractionation (e.g., formation of gypsum and hydrohalite) occurred in the Antarctic coasts in addition to Mirabilite formation. Because of different seasonal variation and range of Mg^<2+> Na^+ between Dome Fuji and Syowa Stations, sea-salt fractionation may proceed even in the inland area. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00181831 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00857289 | |||||
書誌情報 |
南極資料 en : Antarctic Record 巻 54, 号 特集号, p. 668-696, 発行日 2010-12-28 |
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国際十進分類法 | ||||||
主題Scheme | UDC | |||||
主題 | 551.5 |