Changes in terrestrial organic matter input to the Mendeleev Ridge, western Arctic Ocean, during the Late Quaternary

Yamamoto, Masanobu; Polyak, Leonid

Global and Planetary Change, 2009, 68(1-2), 30-37

Permalink : https://hdl.handle.net/2115/39290

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アクセス権
open access
URI
https://hdl.handle.net/2115/39290
タイトル
Changes in terrestrial organic matter input to the Mendeleev Ridge, western Arctic Ocean, during the Late Quaternary
著者
e-Rad_Researcher
60332475
著者名
Yamamoto, Masanobu
著者名
Polyak, Leonid
言語
英語
キーワード
Arctic
biomarker
tetraethers
glacial
HOTRAX'05
ice-rafted debris
paleoenvironment
発行日
2009-07
出版者
Elsevier B.V.
収録物名
Global and Planetary Change
巻(号)
68(1-2)
ページ
30-37
抄録
Hydrocarbons and glycerol dialkyl glycerol tetraethers (GDGTs) were analyzed in Late Pleistocene sediments of Core HLY0503-08JPC collected at the Mendeleev Ridge during the Healy-Oden Trans Arctic Expedition 2005 (HOTRAX'05) to investigate environmental changes in the western Arctic Ocean during the last full glacial cycle, ca. 130 kyr. Variations in long-chain n-alkane and GDGT concentrations correspond to alternated color banding, brown (interglacial/interstadial) and grayish (glacial/stadial) layers. Grayish layers are characterized by abundant higher plant n-alkanes and branched GDGTs, implying larger contribution of terrestrial plant and soil organic matter (OM) in glacial environments, possibly due to the deposition of fine-grained products of glacial erosion in the Amerasian basin. Lithic n-alkanes derived from mature OM show pronounced peaks, which can be classified into six types presumably indicative of various sediment sources. Some peaks are correlated to events of iceberg discharge and freshwater outbursts from proglacial lakes of the Eurasian and, possibly, Laurentide ice sheets, suggesting that other peaks may correspond to similar events.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0921-8181
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1016/j.gloplacha.2009.03.012