High resolution reconstruction of Holocene sea surface temperature in the Southern Ocean and the Arctic Ocean

• Project/Area Number: 25287136
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Hokkaido University
• Principal Investigator: Yamamoto Masanobu 北海道大学, 地球環境科学研究科(研究院), 准教授 (60332475)
• Co-Investigator(Kenkyū-buntansha): IRINO Tomohisa 北海道大学, 大学院地球環境科学研究院, 助教 (70332476)
• Co-Investigator(Renkei-kenkyūsha): YOKOYAMA Yusuke 東京大学, 大気海洋研究所, 教授 (10359648)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
• Keywords: 南極 / 北極 / 古海洋 / 古気候 / TEX86 / 鉱物 / 堆積物 / 海流 / 完新世 / 気候変動 / 水温

Outline of Final Research Achievements

TEX86 analysis indicated that sea surface temperature (SST) decreased from 12,000 years ago to 3,000 years ago and increased afterward off Wilkes Land in the Southern Ocean. In the Chukchi Sea of the Arctic, SST increased since 9,000 years ago. Both areas showed significant millennial-scale SST variability. In the Chukchi Sea core, the chlorite/illite ratio showed higher values in the middle Holocene, suggesting the intensified Bering Strait inflow. The Quartz/feldspar ratios showed a decreasing trend, suggesting a decline of the Beaufort Gyre circulation since 9,000 years ago.

Research Products

• [Int'l Joint Research] 韓国極地研究所(韓国)
• [Int'l Joint Research] オハイオ州立大学(米国)
• [Journal Article] Distribution, source and transportation of glycerol dialkyl glycerol tetraethers in surface sediments from the western Arctic Ocean and the northern Bering Sea. (2014)
  • Author(s): Park, Y.-H., M. Yamamoto, S.-I. Nam, T. Irino, L. Polyak, N. Harada, K. Nagashima, B.-K. Khim, K. Chikita, S.-I. Saitoh
  • Journal Title: Marine Chemistry Volume: 165 Pages: 10-24
  • DOI: 10.1016/j.marchem.2014.07.001
  • Peer Reviewed
• [Presentation] Millennial-scale variability in the Bering Strait inflow during the Holocene (2015)
  • Author(s): Yamamoto,M, Nam,S.I., Kobayashi,D., Irino,T., Shimada,K.
  • Organizer: 18th International Meeting of Asian Marine Geology
  • Place of Presentation: 済州市（韓国）
  • Year and Date: 2015-10-07
  • Int'l Joint Research
• [Presentation] Changes in ice drift pattern in in the western Arctic Ocean during the last 70,000 years (2015)
  • Author(s): Suzuki, K., Yamamoto, M., Nam, S.I., Irino, T., Park, Y.H., Yamanaka, T.
  • Organizer: 18th International Meeting of Asian Marine Geology
  • Place of Presentation: 済州市（韓国）
  • Year and Date: 2015-10-07
  • Int'l Joint Research
• [Presentation] GDGTとC/S比に基づく過去7万年間の西部北極海の海氷漂流パターン復元 (2015)
  • Author(s): 鈴木健太・山本正伸・入野智久・朴惟賢・南承一・山中寿郎
  • Organizer: 第33回日本有機地球化学シンポジウム
  • Place of Presentation: 北海道大学低温科学研究所（北海道札幌市）
  • Year and Date: 2015-08-07
• [Presentation] TEX86は何を示しているのか：海洋水柱懸濁粒子中のインタクトGDGT研究から言えること (2015)
  • Author(s): 山本正伸・大平深史・山下洋平
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-28
• [Presentation] Insolation control on the Beaufort Gyre dynamics during the Holocene. (2015)
  • Author(s): Yamamoto, M., Nam, S.I., Polyak, L., Kobayashi, D., Irino, T., Shimada, K.
  • Organizer: The Fourth International Symposium on the Arctic Research (ISAR-4)
  • Place of Presentation: 富山国際会場（富山県富山市）
  • Year and Date: 2015-04-27
  • Int'l Joint Research
• [Presentation] 完新世の西部北極海． (2015)
  • Author(s): 山本正伸・南承一・Leonid Polyak・小林大祐・入野智久・島田浩二
  • Organizer: 極地研研究集会「北極における過去の気候・環境変動」
  • Place of Presentation: 立川
  • Year and Date: 2015-03-25 – 2015-03-26
• [Presentation] 最終氷期以降の西部北極海の堆積物運搬変遷史． (2015)
  • Author(s): 鈴木健太・山本正伸・入野智久・朴惟賢・南承一
  • Organizer: 極地研研究集会「北極における過去の気候・環境変動」
  • Place of Presentation: 立川
  • Year and Date: 2015-03-25 – 2015-03-26
• [Presentation] 北極海における古環境研究の現状と課題． (2015)
  • Author(s): 山本正伸
  • Organizer: 2014年度海洋学会シンポジウム「自国砕氷船を利用した極域海洋研究」
  • Place of Presentation: 東京
  • Year and Date: 2015-03-21
• [Presentation] 北極海堆積物コア中のGDGT組成変動：７万年前以降の堆積物運搬変遷史の復元． (2014)
  • Author(s): 鈴木健太・朴惟賢・山本正伸・南承一
  • Organizer: 第３２回有機地球科学シンポジウム
  • Place of Presentation: 湯河原
  • Year and Date: 2014-11-06 – 2014-11-07
• [Presentation] アラオンによる海底堆積物研究と海底地形調査から学ぶこと． (2014)
  • Author(s): 山本正伸
  • Organizer: 低温科学研究所共同利用研究集会「両極海における砕氷船を利用した観測研究」
  • Place of Presentation: 札幌
  • Year and Date: 2014-10-27
• [Presentation] Fate of GDGTs in the marine water column. (2014)
  • Author(s): Yamamoto, M., Ohira, F., Yamashita, Y., Nam, S.I.
  • Organizer: GDGT 2014 workshop
  • Place of Presentation: オランダ・テサル
  • Year and Date: 2014-04-23 – 2014-04-25
  • Invited
• [Presentation] 西部北極海の最終氷期以降の古環境復元 (2014)
  • Author(s): 鈴木健太・山本正伸・南承一・入野智久
  • Organizer: 2013年古海洋シンポジウム
  • Place of Presentation: 千葉県柏市東京大学大気海洋研究所
• [Presentation] ベーリング海峡通過流の完新世変動 (2014)
  • Author(s): 山本正伸・南承一・小林大祐・入野智久
  • Organizer: 2013年古海洋シンポジウム
  • Place of Presentation: 千葉県柏市東京大学大気海洋研究所
• [Presentation] Holocene changes in the Bering Strait inflow (2014)
  • Author(s): Yamamoto, M.
  • Organizer: International Joint Workshop: Recent developments in Paleoenvironmental studies
  • Place of Presentation: 札幌市北海道大学理学部
• [Presentation] Surface ocean current and ice drift in the Northwind and Chukchi basins in the western Arctic Ocean during the last 76,000 years (2014)
  • Author(s): Suzuki, K.
  • Organizer: International Joint Workshop: Recent developments in Paleoenvironmental studies
  • Place of Presentation: 札幌市北海道大学理学部
• [Presentation] 過去9,000 年間の西部北極海の海流変動の復元 (2014)
  • Author(s): 山本正伸
  • Organizer: 低温研究所研究集会「極域における過去の気候・環境変動」
  • Place of Presentation: 札幌市北海道大学低温科学研究所
• [Presentation] 過去76,000 年間の西部北極海海流変動 (2014)
  • Author(s): 鈴木健太
  • Organizer: 低温研究所研究集会「極域における過去の気候・環境変動」
  • Place of Presentation: 札幌市北海道大学低温科学研究所
• [Presentation] Changes in the Bering Strait Inflow during the Holocene (2013)
  • Author(s): Yamamoto, M., Nam, S.I., Kobayashi, D., Irino, T., Park, Y.H.
  • Organizer: American Geophysical Union Fall Meeting 2013
  • Place of Presentation: 米国サンフランシスコ，モスコーニ会議場
• [Presentation] Holocene records of glycerol dialkyl glycerol tetraethers from the northern Chukchi Sea. (2013)
  • Author(s): Park, Y.H., Yamamoto, M., Nam, S.I., Polyak, L.
  • Organizer: American Geophysical Union Fall Meeting 2013
  • Place of Presentation: 米国サンフランシスコ，モスコーニ会議場