2024-03-29T11:17:49Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00014599
2023-01-16T04:01:59Z
879:1183:1184:1395
Paleoclimate variability in continental Asia revealed by chemical analyses of Lake Baikal sediment
アジア大陸内陸部の古気候変動 : パイカル湖の湖底堆積物の化学分析から
村上, 拓馬
83200
勝田, 長貴
83201
高松, 武次郎
83202
高野, 雅夫
83203
山本, 鋼志
83204
中村, 俊夫
83205
河合, 崇欣
83206
Murakami, Takuma
83207
Katsuta, Nagayoshi
83208
Takamatsu, Takejiro
83209
Takano, Masao
83210
Yamamoto, Koshi
83211
Nakamura, Toshio
83212
Kawai, Takayoshi
83213
古気候変動
アジア大陸
バイカル湖とフブスグル湖
湖底堆積物
14C年代
2011-03
Lake Baikal sediment contain information for understanding of long-term climate changes in the in the continental interior. In the present study, we analyzed abundances of biogenic silica and uranium in the core sediment (BDP93-2 and BSS06-G2) from Buguldeika saddle in southern part of the lake. The uranium concentration shows a similar fluctuation pattern with the biogenic silica concentration (as a paleotemperature proxy) on a glacial and interglacial scale (i.e., 100-kyr periodicity), whereas these two chemical components an inverse correlation on a centennial to millennial scale during the interglacial and interstadial periods. This means that sedimentation process of biogenic silica and uranium in Lake Baikal is different from each other, suggesting that the uranium concentration of sediment is paleclimate proxy different from palotemperature proxy (i.e., paleomoisture proxy). Also, comparison of the Baikal uranium concentration with the Hovsgol detrital component indicates a positive correlation during the late Holocene each other. Based on the above assumption, climate of continental Asia become wet condition during the interglacial and interstadial periods and dry condition during the glacial periods. In addition, the climate during interglacial and interstadial periods is characterized by alternation of cold-wet and warm-dry conditions.
第23回名古屋大学年代測定総合研究センターシンポジウム平成22(2010)年度報告
departmental bulletin paper
名古屋大学年代測定資料研究センター
2011-03
名古屋大学加速器質量分析計業績報告書
22
65
71
jpn