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夏季の南極昭和基地周辺の定着氷下におけるクロロフィルa及び硝酸塩濃度の時間変化
https://doi.org/10.15094/00009293
https://doi.org/10.15094/00009293610ef727-5c4f-4901-8aaa-3739d7b3d163
名前 / ファイル | ライセンス | アクション |
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KJ00002361418 (873.5 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2004-11-30 | |||||
タイトル | ||||||
タイトル | 夏季の南極昭和基地周辺の定着氷下におけるクロロフィルa及び硝酸塩濃度の時間変化 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer | |||||
言語 | ||||||
言語 | eng | |||||
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 | 10.15094/00009293 | |||||
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 | カキ ノ ナンキョク ショウワキチ シュウヘン ノ テイチャクヒョウカ ニオケル クロロフィルa オヨビ ショウサンエン ノウド ノ ジカン ヘンカ | |||||
著者名(日) |
小達, 恒夫
× 小達, 恒夫× 福地, 光男 |
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著者名(英) |
Odate, Tsuneo
× Odate, Tsuneo× Fukuchi, Mitsuo |
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著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research, Research Organization of Information and Sysytems/National Institute of Polar Research, Research Organization of Information and Sysytems | ||||||
抄録(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 1996年12月30日,1997年1月12日及び21日に,南極昭和基地周辺のリュツォ・ホルム湾の4点において,水深5mから海底の間の数層から海水試料を得た.得られた試料を基にクロロフィルa(Chl a)及び硝酸塩(NO3)濃度の鉛直分布を調べた.いずれの観測点においても表層の成層水中(<20m)でChl a及びNO3濃度が時間とともに大きく変化した.両濃度には有意な負の関係があった(n=40, P<0.01).この関係は,Chl aが1μg l-1増加するときNO3を0.89μM消費することを示唆する.しかしながら,本研究で見られたような厚い海氷(2.0-3.6m)下における光強度は,植物プランクトンが増殖するのに厳しい条件にある.本研究で観測されたChl aの増加が,植物プランクトンが厚い定着氷下で増殖した結果とは考えにくい.好光条件の下でChl aを増加させ,NO3を消費した海水が観測海域へ移流していたと考えられる.この移流が,厚い定着氷下で見かけ上Chl aが増加しNO3が低下する要因と思われる. | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Seawater samples beneath fast ice were collected from several depths using a Niskin bottle at four sites near Syowa Station, Antarctica, on 30 December 1996, and 12 and 21 January 1997. Vertical distributions of chlorophyll a (Chl a) and nitrate (NO3) concentrations were determined. Substantial temporal changes in Chl a and NO3 concentrations occurred in the surface stratified layer (<20m). There was a significant negative correlation between both the concentrations (n=40, P<0.01). This relationship suggests that an increase of 1μg l-1 of Chl a consumes 0.89μM of NO3 under fast ice. However, light limitation is severe for phytoplankton growing under thick sea ice (2.0-3.6m), as observed in the present study. It is unlikely that the observed increases of Chl a result from phytoplankton growth under heavy fast ice. Seawater, in which Chl a has increased and NO3 has been consumed under favorable light conditions, may be advected into the study area. This advection may be responsible for the apparent increase of Chl a and decrease of NO3 concentrations under the heavy fast ice. | |||||
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 48, 号 3, p. 157-164, 発行日 2004-11-30 |
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国際十進分類法 | ||||||
主題Scheme | UDC | |||||
主題 | 551.46 | |||||
出版者 | ||||||
出版者 | 情報・システム研究機構 国立極地研究所 |