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Dr. Shinya Iwasaki



Micropaleontology - Paleoceanography


+49 421 218-65958



MARUM II, 1030

Shinya Iwasaki

Research Interest

The consistent and general motive of my research has been an interest in paleoceanography on the time scale of glacial-interglacial and environmental change in the modern ocean using planktic foraminifera or other biogenic materials. Thus far, I have been particularly working on the mechanisms of ocean carbon cycle based on the measurements of carbonate sediment dissolution. I have also been working on the influence of ocean acidification to the calcification of marine organism. Specific research interests include/included.

  • Biogenic productivity change in the sea surface on the time scale of glacial-interglacial.
  • Development of paleo-deep seawater [CO32–] proxy using foraminiferal shell.
  • Reconstruction of deep seawater [CO32–] after the last glacial period.
  • Influence of ocean acidification to carbonate organism (foraminifera and coral).  


03/2014 Ph.D.  Department of Earth and Planetary Sciences Graduate School of Sciences, Kyushu University, JAPAN
03/2011 M.Sc. Department of Earth and Planetary Sciences Graduate School of Sciences, Kyushu University, JAPAN
03/2009 B.Sc. Department of Earth and Planetary Sciences, Kyushu University


Professional Experience

2017 – 2020 JSPS Fellowship for Postdoctoral Fellow, JAMSTEC
2018 – 2019 Visiting Fellow, Alfred-Wegener Institute (AWI)
2016 – 2017

Postdoctral Researcher, Geological Survey of Japan

2015 – 2016 Postdoctral Researcher, University of Tokyo
2014 – 2015 JSPS Fellowship for Postdoctoral Fellow, University of Tokyo
2013 – 2014 JSPS Fellowship for Doctoral Course Students, Kyushu University


Shinya Iwasaki , Katsunori Kimoto, Yusuke Okazaki, Minoru Ikehara, X-ray micro-CT scanning of tests of three planktic foraminiferal species to clarify dissolution process and progress, Geochemistry, Geophysics, Geosystems, DOI: 10.1029 / 2019GC008456, 2019

Shinya Iwasaki , Katsunori Kimoto, Osamu Sasaki, Harumasa Kano, Hiroshi Uchida, Sensitivity of planktic foraminiferal test bulk density to ocean acidification, Scientific Reports , https://doi.org/10.1038/s41598-019-46041-x, 2019
Kawahata, H., Fujita, K., Iguchi, A., Inoue, M., Iwasaki, S. , Kuroyanagi, A., Maeda, A., Manaka, T., Moriya, K., Takagi, H., Toyofuku, T., Yoshimura, T., Perspective on the response of marine calcifiers to global warming and ocean acidification - Behavior of corals and foraminifera in a high CO 2 world “hot house.” Progress in Earth and Planetary Science, https://doi.org/10.1186/s40645-018-0239-9, 2019
Shinya Iwasaki , Atsushi Suzuki, Akira Iguchi, Osamu Sasaki, Harumasa Kano, Yoshikazu Ohno, Koichiro Enomoto, Effect of seawater turbulence on formation of coral primary polyp skeletons, Coral Reefs, 37 (3), 939-944, 2018
Shinya Iwasaki , Katsunori Kimoto, Azumi Kuroyanagi, Hodaka Kawahata, Horizontal and vertical distributions of planktic foraminifera in the subarctic Pacific, Marine Micropaleontology , 130, 1-14, 2017
Shinya Iwasaki , Mayuri Inoue, Atsushi Suzuki, Osamu Sasaki, Harumasa Kano, Akira Iguchi, Kazuhiko Sakai, Hodaka Kawahata, The role of symbiotic algae in the formation of the coral polyp skeleton: 3-D morphological study based on X-ray micro- computed tomography, Geochemistry, Geophysics, Geosystems, 17, doi: 10.1002 / 2016GC006536. 2016
Shinya Iwasaki , Kozo Takahashi, Yoshiyuki Kanematsu, Hirofumi Asahi, Jonaotaro Onodera, AC Ravelo, Paleoproductivity and paleoceanography of the last 4.3 Myrs at IODP Expedition 323 Site U1341 in the Bering Sea based on biogenic opal content, Deep Sea Research II , 125–126 , 145-154, 2016
Shinya Iwasaki , Katsunori Kimoto, Osamu Sasaki, Harumasa Kano, Makio C. Honda, Yusuke Okazaki, Observation of the dissolution process of Globigerina bulloides tests (planktic foraminifera) by X-ray micro-computed tomography, Paleoceanography , 30, 317–331, 2015
Shinya Iwasaki , Kozo Takahashi, Yusuke Ogawa, Seiichiro Uehara, Christoph Vogt, Alkaline leaching characteristics of biogenic opal in Eocene sediments from the central Arctic Ocean: a case study in the ACEX cores, Journal of Oceanography , DOI 10.1007 / s10872-014-0227 -7, 2014
Shinya Iwasaki , Kozo Takahashi, Takuya Maesawa, Tatsuhiko Sakamoto, Saburo Sakai, Koichi Iijima, Paleoceanography of the last 500 kyrs in the central Okhotsk Sea based on geochemistry, Deep-Sea Research II , 61-64, pp. 50-62, 2012
Shinya Iwasaki, Kozo Takahashi, Yoshiyuki Kanematsu, Alkaline leaching characteristics of biogenic opal in IODP drilled cores from the Bering Sea, Memoirs of the Faculty of Sciences, Kyushu University, Series D, Earth and Planetary Sciences, Kyushu University Institutional Repository, 32, pp. 39-44, 2012
Takahashi, K., Asahi, H., Okazaki, Y., Onodera, J., Tsutsui, H., Ikenoue, T., Kanematsu, Y., Tanaka, S., Iwasaki, S., 2012.  Museum archives of the 19 years long time-series sediment trap samples collected at central subarctic Pacific Station SA and Bering Sea Station AB during 1990-2010. Mem, Fac, Sci., Kyushu Univ., Ser, D, Earth and Planet, Sci,  Vol, 32(4), Pages 1-38, 2012