Development of proxy for paleotemperature using laser spectroscopy

• Project/Area Number: 23681006
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: SAKAI Saburo 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, 技術研究副主任 (90359175)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥27,170,000 (Direct Cost: ¥20,900,000、Indirect Cost: ¥6,270,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2011: ¥21,060,000 (Direct Cost: ¥16,200,000、Indirect Cost: ¥4,860,000)
• Keywords: 環境変動 / 酸素同位体 / レーザー分光 / 古水温 / 安定同位体 / 中赤外 / 炭酸塩

Research Abstract

A new mid-infrared laser spectrometer designed to measure the CO2 isotopologues of carbonates including the doubly substituted CO2 isotopologue has developed. This instrument has some advantage compared with mass spectrometer: 1) ionization is not needed, 2) no overlap with the absorption area of water, 3) high detection limit (ppt level). This new approach to the analysis of clumped isotopologues in carbonates dramatically expands the areas in which they can be applied.

Research Products

• [Journal Article] Hydrogen sulfide and organic carbon at the sediment-water interface in a coastal brackish lake Nakaumi, SW Japan (2013)
  • Author(s): Sakai, S
  • Journal Title: Environmental Earth Sciences Volume: 68 Pages: 1999-2006
  • Peer Reviewed
• [Journal Article] ボーリングコアのX線CTスキャン解析による東北地方太平洋沖地震における地盤液状化層の同定：浦安市舞浜3丁目コア資料の例 (2012)
  • Author(s): 平 朝彦
  • Journal Title: 地質学雑誌 Volume: 118 Pages: 410-418
  • Peer Reviewed
• [Journal Article] Assessing subsidence rates and paleo water-depths for Tahiti reefs using U–Th chronology of altered corals (2012)
  • Author(s): Alexander L.T.
  • Journal Title: Marine Geology Volume: 295-298 Pages: 86-94
  • Peer Reviewed
• [Journal Article] Paleoceanography of the last 500kyrs in the central Okhotsk Sea based on geochemistry (2012)
  • Author(s): Iwasaki, S.
  • Journal Title: Deep-Sea Research II Volume: 61-64 Pages: 50-62
  • Peer Reviewed
• [Journal Article] Micro-powder collecting technique for stable isotope analysis of carbonates (2011)
  • Author(s): Sakai, S.
  • Journal Title: Rapid Communications in Mass Spectrometry Volume: 25 Issue: 9 Pages: 1205-1208
  • DOI: 10.1002/rcm.4980
  • Peer Reviewed
• [Presentation] CO_2 Isotopologue Measurement of Carbonates by Tunable Mid-infrared Laser Spectroscopy (2014)
  • Author(s): Sakai, S. Shimono, A. Hikita, T., Mcmanus, J.B., Zahniser, M., Nelson, D., Matsuda, S., Dettman, D.L
  • Organizer: The 7^<th> International Symposium on Isotopomers
  • Place of Presentation: Tolyo
• [Presentation] CO2 Isotoplogue Measurements of Carbonates by Tunable Mid-infrared Laser Spectroscopy (2014)
  • Author(s): Saburo Sakai
  • Organizer: International Symposium on Isotopomers (ISI2014)
  • Place of Presentation: Tokyo Institute of Technology, Tokyo
• [Presentation] 炭酸塩の微小領域同位体計測法と汽水域環境解析への応用 (2012)
  • Author(s): 坂井三郎
  • Organizer: 汽水域研究会・スペシャルセッション
  • Place of Presentation: 広島大学
  • Invited
• [Presentation] 中海における現生貝形虫の酸素同位体比と過去1700年間の古環境変動 (2012)
  • Author(s): 石田 桂
  • Organizer: 日本地質学会
  • Place of Presentation: 大阪府立大学
• [Presentation] Centennial-scale biotic responses of benthic foraminifera to climatic oscilations in Aso-Kai Lagoon, central Japan (2012)
  • Author(s): Takata H.
  • Organizer: ASLO Aquatic Sciences Meeting
  • Place of Presentation: Biwako Hall
• [Presentation] Advances in high-resolution stable isotope analyses of carbonates using micromilling and micro-powder sampling techniques (2011)
  • Author(s): Saburo Sakai
  • Organizer: AOGS
  • Place of Presentation: 台湾(台北)(招待講演)
  • Year and Date: 2011-08-12