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last modified：2025/04/02
Associate Professor Takuya Sagawa
Faculty, Affiliation
Faculty of Geosciences and civil Engineering,Institute of Science and Engineering Earth Science Course
Associate Professor
College and School Educational Field
Division of Geosciences and Civil Engineering, Graduate School of Natural Science and Technology
Course in Earth and Planetary Science, School of Geosciences and Civil Engineering, College of Science and Engineering
Laboratory
Academic Background
【Academic background(Doctoral/Master's Degree)】
Hokkaido University Master Graduate School of Earth and Environmental Science 200203 Completed
Hokkaido University Doctor Graduate School of Earth and Environmental Science 200509 Completed
【Academic background(Bachelor's Degree)】
Hokkaido University 200003
【Degree】
Ph.D
Career
Year & Month of Birth
Academic Society
Paleontological Society of Japan
The Geological Society of Japan
The Geochemical Society of Japan
Paleosciences Society
The Oceanographic Society of Japan
American Geophysical Union
Award
American Geophysical Union
Specialities
Stratigraphy/Paleontology、Environmental dynamic analysis
Speciality Keywords
Paleoclimatology and Paleoceanography, Geochemistry
Research Themes
Long-term variation of water column structure in the western equatorial Pacific
Late Quaternary paleoceanography of the Japan Sea
Books
Papers
- Re-organization of Pacific overturning circulation across the Miocene Climate Optimum Ann Holbourn,Wolfgang Kuhnt,Denise K. Kulhanek,Gregory Mountain,Yair Rosenthal,Takuya Sagawa,Julia Lübbers,Nils Andersen Nature Communications 15 1 2024/09/17
- Silicoflagellate assemblages in the North Pacific surface sediments: an application of the modern analog method to reconstruct the glacial sea surface temperature in the Japan Sea Yusuke Okazaki,Jonaotaro Onodera,Kyohei Tanizaki,Fumiaki Nishizono,Kazuki Egashira,Asuka Tomokawa,Takuya Sagawa,Keiji Horikawa,Ken Ikehara Progress in Earth and Planetary Science 11 1 2024/12/05
- Millennial-scale paleotemperature change in the Japan Sea during Marine Isotope Stage 3: Impact of meridional oscillation of the subpolar front Takuya Sagawa, Takashi Hasegawa, Yusuke Narita, Masahiro Yokoyama, Yoshimi Kubota, Yusuke Okazaki, Akiko S. Goto, Yoshiaki Suzuki, Ken Ikehara, Takeshi Nakagawa Palaeogeography, Palaeoclimatology, Palaeoecology 2023/09/15
- Orbital-scale thermocline temperature variability in the western equatorial Pacific during the last 370 kyr Sagawa, T., Okamura, K., and Murayama, M. Palaeogeography, Palaeoclimatology, Palaeoecology 608 2022/10/18
- The FORCIS database: A global census of planktonic Foraminifera from ocean waters Sonia Chaabane, Thibault de Garidel-Thoron, Xavier Giraud, Ralf Schiebel, Gregory Beaugrand, Geert-Jan Brummer, Nicolas Casajus, Mattia Greco, Maria Grigoratou, Hélène Howa, Lukas Jonkers, Michal Kucera, Azumi Kuroyanagi, Julie Meilland, Fanny Monteiro, Graham Mortyn, Ahuva Almogi-Labin, Hirofumi Asahi, Simona Avnaim-Katav, Franck Bassinot, Catherine V. Davis, David B. Field, Iván Hernández-Almeida, Barak Herut, Graham Hosie, Will Howard, Anna Jentzen, David G. Johns, Lloyd Keigwin, John Kitchener, Karen E. Kohfeld, Douglas V. O. Lessa, Clara Manno, Margarita Marchant, Siri Ofstad, Joseph D. Ortiz, Alexandra Post, Andres Rigual-Hernandez, Marina C. Rillo, Karen Robinson, Takuya Sagawa, Francisco Sierro, Kunio T. Takahashi, Adi Torfstein, Igor Venancio, Makoto Yamasaki, Patrizia Ziveri Scientific Data 10 2023/06/03
- Low sea surface salinity event of the Japan Sea during the Last Glacial Maximum Zheng, J., Guo, X., Yang, H., Du, K., Mao, X., Jiang, W., Sagawa, T., Miyazawa, Y., Varlamov, MS., Abe-Ouchi, A., and Chan, W-L. Paleoceanography and Paleoclimatology 2023/01/17
- Determination of whole-rock trace-element compositions of siliceous rocks using MgO-diluted fused glass and LA-ICP-MS Tamura, A., Sagawa, T., Okino, K., and Morishita, T. Geochemical Journal 56 6 231-239 2022/12/31
- Simultaneous determination of I/Ca and other elemental ratios in foraminifera: comparing results from acidic and basic solutions Zhou, X., Hess, A., Bu, K., Sagawa, T., and Rosenthal, Y. Geochemistry, Geophysics, Geosystems 2022/10/26
- Validation of Trace Element Analysis of Geological Materials by Single-Pulse Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) Sagawa, T., Tamura, A., Okino, K., and Morishita, T. Analytical Letters 2022/05/19
- Understanding the Role of Biogenic Magnetite in Geomagnetic Paleointensity Recording: Insights From Ontong Java Plateau Sediments Li, J., Yamazaki, T., Usui, Y., Sagawa, T., Kubota, Y., and Kuroda, J. Journal of Geophysical Research: Solid Earth 127 2022/05/23
- Data report: Middle to Lower Miocene radiolarian biostratigraphy in the Western Pacific Warm Pool at IODP Expedition 363 Site U1490: preliminary results Matsuzaki, KM., Kamikuri, S., Sagawa, T. Proceedings of the International Ocean Discovery Program 363 2023/05/12
- Late Holocene centennial to millennial-scale variability in lower trophic level productivity off southern Hokkaido, Japan, and its response to dissolved iron-replete Coastal Oyashio dynamics Michinobu Kuwae, Narumi Tsugeki, Bruce P. Finney, Yukinori Tani, Jonaotaro Onodera, Mako Kiyoto, Mitsukuni Kusaka, Takuya Sagawa, Yugo Nakamura, Hiroji Ohnishi, Hiroshi Kuroda, Noboru Okuda, Tamihisa Ohta, Minoru Ikehara, Tomohisa Irino Quaternary Research 1-16 2022/02/22
- Palaeoceanography of the Japan Sea Across the Mid-Pleistocene Transition: Insights From IODP Exp. 346, Site U1427 Sonja Felder, Takuya Sagawa, Mervyn Greaves, Melanie J. Leng, Ken Ikehara, Katsunori Kimoto, Siro Hasegawa, Thomas Wagner, Andrew C. G. Henderson Paleoceanography and Paleoclimatology 37 2021/12/07
- Neodymium isotope records from the Northwestern Pacific: Implication for deepwater ventilation at Heinrich Stadial 1 Keiji Horikawa, Yukiko Kozaka, Yusuke Okazaki, Takuya Sagawa, Jonaotaro Onodera, Hirofumi Asahi, Ki-Cheol Shin, Yoshihiro Asahara, Kozo Takahashi Paleoceanography and Paleoclimatology 36 2021/09/30
- Orbital-scale vegetation-ocean-atmosphere linkages in western Japan during the last 550 ka based on a pollen record from the IODP site U1427 in the Japan Sea Ryoma Hayashi, Takuya Sagawa, Tomohisa Irino, Ryuji Tada Quaternary Science Reviews 267 107103 2021/08/03
- Comprehensive analysis of laboratory boron contamination for boron isotope analyses of small carbonate samples Kaoru Kubota, Tsuyoshi Ishikawa, Kazuya Nagaishi, Tatsuya Kawai, Takuya Sagawa, Minoru Ikehara, Yusuke Yokoyama, Toshitsugu Yamazaki Chemical Geology 576 120280 2021/04/24
- Equatorial Pacific seawater pCO2 variability since the last glacial period Kubota, K., Yokoyama, Y., Ishikawa, T., Sagawa, T., Ikehara, M., and Yamazaki, T. Scientific Reports 9 2019/09/25
- Paleoceanographic evolution of the Japan Sea over the last 460 kyr - A coccolithophore perspective Saavedra-Pellitero, M., Baumann, K-H., Gallagher, SJ., Sagawa, T., and Tada, R. Marine Micropaleontology 152 2019/09/01
- Benthic Biotic Response to Climate Changes Over the Last 700,000 Years in a Deep Marginal Sea: Impacts of Deoxygenation and the Mid‐Brunhes Event Huai‐Hsuan M. Huang, Moriaki Yasuhara, Hokuto Iwatani, Carlos A. Alvarez-Zarikian, Maria‐Angela Bassetti, Takuya Sagawa Paleoceanography and Paleoclimatology 2018/06/25
- East Asian Monsoon History and Paleoceanography of the Japan Sea Over the Last 460,000 Years Stephen J. Gallagher, Takuya Sagawa, Andrew C. G. Henderson, Mariem Saavedra‐Pellitero, David De Vleeschouwer, Heather Black, Takuya Itaki, Sam Toucanne, Maria‐Angela Bassetti, Steve Clemens, William Anderso, Carlos Alvarez‐Zarikian, Ryuji Tada Paleoceanography and Paleoclimatology 2018/06/13
- Construction of perfectly continuous records of physical properties for dark-light sediment sequences collected from the Japan Sea during Integrated Ocean Drilling Program Expedition 346 and their potential utilities as paleoceanographic studies Tomohisa Irino, Ryuji Tada, Ken Ikehara, Takuya Sagawa, Akinori Karasuda, Shunsuke Kurokawa, Arisa Sek, Song Lu Progress in Earth and Planetary Science 5 23 2018/04/19
- High-resolution and high-precision correlation of dark and light layers in the Quaternary hemipelagic sediments of the Japan Sea recovered during IODP Expedition 346 Tada R, Irino T, Ikehara K, Karasuda A, Sugisaki S, Xuan C, Sagawa T, Itaki T, Kubota Y, Lu S, Seki A, Murray RW, Alvarez-Zarikian C, Anderson WT, Bassetti M-A, Brace BJ, Clemens SC, da Costa Gurgel MH, Dickens GR, Dunlea AG, Gallagher SJ, Giosan L, Henderson ACG, Holbourn AE, Kinsley CW, Lee GS, Lee KE, Lofi J, Lopes CICD, Saavedra-Pellitero M, Peterson LC, Singh RK, Toucanne S, Wan S, Zheng H, Ziegler M Progress in Earth and Planetary Science 5 19 2018/03/26
- Integrated tephrostratigraphy and stable isotope stratigraphy in the Japan Sea and East China Sea using IODP Sites U1426, U1427, and U1429, Expedition 346 Asian Monsoon Sagawa T, Nagahashi Y, Satoguchi Y, Holbourn A, Itaki T, Gallagher SJ, Saavedra-Pellitero M, Ikehara K, Irino T, Tada R Progress in Earth and Planetary Science 5 18 2018/03/22
- A deep-sea agglutinated foraminifer tube constructed with planktonic foraminifer shells of a single species Paul N. Pearson and IODP Expedition 363 Shipboard Scientific Party J. Micropalaeontol. 37 97-104 2018/01/05
- Multidecadal, centennial, and millennial variability in sardine and anchovy abundances in the western North Pacific and climate–fish linkages during the late Holocene Kuwae M, Yamamoto M, Sagawa T, Ikehara K, Irino T, Takemura K, Takeoka H, Sugimoto T Progress in Oceanography 159 86-98 2017/09
- Evolution of the North Pacific Subtropical Gyre during the past 190 kyr through the interaction of the Kuroshio Current with the surface and intermediate waters Yurika Ujiié, Hirofumi Asahi, Takuya Sagawa, Franck Bassinot Paleoceanography 31 11 1498-1513 2016/11/15
- Solar forcing of centennial-scale East Asian winter monsoon variability in the mid- to late Holocene Sagawa T., Kuwae M., Tsuruoka K., Nakamura Y., Ikehara M., and Murayama M. Earth and Planetary Science Letters 395 124-135 2014/04/09
- Seasonal variations in planktonic foraminiferal flux and oxygen isotopic composition in the western North Pacific: Implications for paleoceanographic reconstruction Sagawa T., Kuroyanagi A., Irino T. Kuwae M. and, Kawahata H. Marine Micropaleontology 100 11-20 2013/04/06
- Stratigraphy and wiggle-matching-based age-depth model of late Holocene marine sediments in Beppu Bay, southwest Japan Kuwae M., Yamamoto M., Ikehara K., Irino T., Takemura K., Sagawa T., Sakamoto T., Ikehara M., Takeoka H. Journal of Asian Earth Sciences 69 133-148 2012/06/16
- Shoaling of the western equatorial Pacific thermocline during the last glacial maximum inferred from multispecies temperature reconstruction of planktonic foraminifera Sagawa T., Yokoyama Y., Ikehara M., Kuwae M. Palaeogeography, Palaeoclimatology, Palaeoecology 346-347 120-129 2012/06/12
- Ventilation changes in the western North Pacific since the last glacial period Y. Okazaki, T. Sagawa, H. Asahi, K. Horikawa, J. Onodera Climate of the Past 8 17-24 2012/01/03
- Limits on conservative behavior of Nd isotopes in seawater assessed from analysis of fish teeth from Pacific core tops Horikawa K., Martin E.E., Asahara Y., Sagawa T. Earth and Planetary Science Letters 310 1-2 119-130 2011/08/16
- Vertical thermal structure history in the western subtropical North Pacific since the last glacial maximum Sagawa T., Yokoyama Y., Ikehara M., Kuwae M Geophysical Research Letters 38 L00F02 2011/01/11
- Latitudinal and downcore (0-750 ka) changes in n-alkane chain lengths in the eastern equatorial Pacific Horikawa K., Murayama M., Minagawa M., Kato Y., Sagawa T. Quaternary Research 73 3 573-582 2010/02/12
- Mg/Ca thermometry of planktonic foraminifera and application to paleoceanography Journal of Geological Society of Japan 116 2 63-84 2010/02
- Intermediate water ventilation change in the subarctic northwest Pacific during the last deglaciation Sagawa T., Ikehara K. Geophysical Research Letters 35 L24702 2008/12/18
- Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry Greaves et al. Geochemistry Geophysics Geosystems (G-cubed) 9 Q08010 2008/08/19
- Sea surface temperature record off central Japan since the Last Glacial Maximum using planktonic foraminiferal Mg/Ca thermometry Sagawa T., Toyoda K., Oba T. Journal of Quaternary Science 21 1 63-73 2005/08/09
Conference Presentations
- Upper ocean temperature history in the western Pacific warm pool during the Plio-Pleistocene(conference：American Geophysical Union Fall Meeting 2025 )(2024/12/10)
Others
Arts and Fieldwork
Patent
Theme to the desired joint research
Grant-in-Aid for Scientific Research
○「熱帯太平洋における東西非対称性の発達過程と全球寒冷化の関係解明」(2022-2024)
○「新規開発の高温側古水温プロキシ・超長鎖アルケノンが拓く温室地球解読の新展開」(2022-2025)
○「新生代後期の北半球氷床拡大と熱帯太平洋大気海洋相互作用の関係解明」(2018-2021)
○「氷期－間氷期サイクルの誕生と初期進化：北大西洋深層水の役割に関する新仮説の検証」(2018-2020)
○「万年スケールでみた黒潮の流路変遷と黒潮分枝流の形成メカニズム」(2017-2020)
○「最終氷期以降の太平洋子午面循環と気候変動」(2016-2018)
○「中期更新世気候変換期における西部熱帯太平洋貯熱量変動の解明」(2015-2017)
○「水月湖と日本海の精密対比：ダンスガード・オシュガーイベントの原因論をめざして」(2015-2017)
○「クランプトアイソトープによる最終氷期最盛期の日本海表層水温復元」(2015-2016)
○「最終融氷期における北太平洋中層貧酸素イベントと表層環境変動とのリンケージの解明」(2008-2010)
○「現在より温暖な時期における対馬海流が日本海の古海洋と生態系に与えた影響」(2023-2025)
○「過去の温暖期の大西洋子午面循環弱化イベントに対する中緯度偏西風帯の応答」(2023-2025)
Competitive research funding,Contribution
Collaborative research,Consignment study
Classes (Bachelors)
○Earth Sciences for Education(2022)
○Geological Field Work A(2022)
○Applied Treatment of Geological Materials A(2022)
○Methods for Geological Field Work A(2022)
○Treatment of Geological Materials A(2022)
○Earth Environment A(2022)