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  1. D300 大学院環境学研究科
  2. D300a 雑誌掲載論文
  3. 学術雑誌

Middle to late-Holocene decreased fluvial aggradation and widespread peat initiation in the Ishikari lowland (northern Japan)

http://hdl.handle.net/2237/25538
http://hdl.handle.net/2237/25538
7fa969b5-72cb-4dee-85c5-3ed1c6777de3
名前 / ファイル ライセンス アクション
ishii2016.pdf ishii2016.pdf (11.5 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-01-30
タイトル
タイトル Middle to late-Holocene decreased fluvial aggradation and widespread peat initiation in the Ishikari lowland (northern Japan)
言語 en
著者 Ishii, Yuji

× Ishii, Yuji

WEKO 69219

en Ishii, Yuji

Search repository
Hori, Kazuaki

× Hori, Kazuaki

WEKO 69220

en Hori, Kazuaki

Search repository
Momohara, Arata

× Momohara, Arata

WEKO 69221

en Momohara, Arata

Search repository
Nakanishi, Toshimichi

× Nakanishi, Toshimichi

WEKO 69222

en Nakanishi, Toshimichi

Search repository
Hong, Wan

× Hong, Wan

WEKO 69223

en Hong, Wan

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 This study investigated the influence of sea-level and climate changes on the decreased fluvial aggradation and subsequent widespread peat initiation in the middle to late-Holocene in the Ishikari lowland, which is a coastal floodplain formed in response to the postglacial sea-level change. By introducing a new approach to separately evaluate the rates of organic and clastic sediment input, we demonstrated that the peat began to form when the fluvial sedimentation rate was significantly decreased (less than 0.6 mm/yr), while plant macrofossil analysis suggested that lowering of water level is also important to the peat initiation. Such changes in sedimentary environment may be associated with the abrupt abandonment of crevasse splays. The concentrated ages of the peat initiation around 5600–5000, 4600–4300, and 4100–3600 cal. BP suggest that an allogenic control promoted the abandonment of crevasse splays, and different onset ages can be explained by different fluvial responses of the Ishikari River and its tributaries. The abandonment of crevasse splays could result from sea-level fall or decreased precipitation. While submillennial sea-level fluctuations coincident with the peat initiation have not been reported in coastal lowlands of Japan, the close comparison of the onset ages and decreased precipitation recorded in a stalagmite from China, which represents the strength of the East Asian summer monsoon (EASM), suggests that decrease in precipitation led to the abandonment of crevasse splays. Our results may indicate that similar fluvial responses might be common in other coastal floodplains affected by the EASM.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 SAGE Publications
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1177/0959683616646189
ISSN
収録物識別子タイプ PISSN
収録物識別子 0959-6836
書誌情報 en : The Holocene

巻 26, 号 12, p. 1924-1938, 発行日 2016-12
著者版フラグ
値 author
URI
識別子 https://doi.org/10.1177/0959683616646189
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/25538
識別子タイプ HDL
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