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南極産二枚貝Laternula ellipticaの殻に残された安定同位体の記録 : 南極の融氷水の歴史
https://doi.org/10.14945/00000358
https://doi.org/10.14945/000003585a33ac34-2a0c-4af4-8da6-7df5e40aa112
名前 / ファイル | ライセンス | アクション |
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KJ00000102440.pdf (1.1 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
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公開日 | 2008-01-25 | |||||||
タイトル | ||||||||
タイトル | 南極産二枚貝Laternula ellipticaの殻に残された安定同位体の記録 : 南極の融氷水の歴史 | |||||||
言語 | ||||||||
言語 | jpn | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | oxygen isotope | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | carbon isotope | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Antarctica | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Laternula elliptica | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | melt water history | |||||||
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 | 10.14945/00000358 | |||||||
ID登録タイプ | JaLC | |||||||
タイトル(別言語) | ||||||||
その他のタイトル | Stable isotopic records from Antarctic Laternula elliptica's shell : the history of meltwater in Antarctica | |||||||
著者 |
河合, 庸展
× 河合, 庸展× 和田, 秀樹
WEKO
188
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書誌情報 |
静岡大学地球科学研究報告 巻 26, p. 29-37, 発行日 1999-07 |
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出版者 | ||||||||
出版者 | 静岡大学地球科学教室 | |||||||
NDC | ||||||||
主題Scheme | NDC | |||||||
主題 | 450 | |||||||
抄録 | ||||||||
内容記述タイプ | Abstract | |||||||
内容記述 | Stable isotopes of oxygen and carbon are useful tools in understanding the paleoclimates. The stereome isotopic data of an organism is indicative of the isotopic composition of the ocean water where the organism lived. In this study we measured stable carbon and oxygen isotopes of the shell an Antarctic Bivalvia Laternula elliptica. Samples of fossil Antarctic Bivalvia L. elliptica shell from the Pliestocene (46ka) and Holocene (3.5 ka-4ka) were collected from Lutzow Holm Bay and from the Recent L. elliptica at MucMurdo Sound in Antarctica. The quantity of meltwater from ice sheet militating the ocean water can be estimated from the δ^<l8>O of shells of Laternula. Detailed microsampling within a shell also sheds light on seasonal isotopic variation. We measured two modern as well as three fossil shells (3.5ka-4ka) and some 46ka shell fragments. The δ^<l3>C values suggest that in L. elliptica inception of carbon occurred during the course of growth. The δ^<l8>O values have a seasonal variation of about 1‰. The light values are suggestive of addition of meltwater indicating summer season and the heavy values are likely to winter. This seasonality gives important information about the life span of a molluscan shell. Using these data the life span of the Recent L. elliptica might have been for 7 years and that of the fossil Laternula about 9 years. The δ^<l8>O fluctuation within Recent shells are in the range of 1‰, and that of the fossil shells in 3‰, which shows that there was a greater variation of oxygen isotopes during the course of life 3.5ka-4ka than the Recent. The ^<l8>O depleted value suggests that there was mass mixing of meltwater with the sea water at 3.5ka-4ka which decreased toward the Recent. In this study the shell data of the three periods indicate that the biggest meltwater effect was the highest recorded at 3.5ka-4ka and the second was around 46ka. | |||||||
ISSN | ||||||||
収録物識別子タイプ | ISSN | |||||||
収録物識別子 | 03886298 | |||||||
NII論文ID | ||||||||
関連タイプ | isIdenticalTo | |||||||
識別子タイプ | NAID | |||||||
関連識別子 | 110000413388 | |||||||
NII書誌ID | ||||||||
収録物識別子タイプ | NCID | |||||||
収録物識別子 | AN00103190 | |||||||
フォーマット | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | application/pdf | |||||||
著者版フラグ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |