Researcher Database

（Last updated : 2024-05-22 09:40:49）　

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Kitaba Ikuko

Department / Course Research Organization of Science and Technology

Title / Position Associate Professor

Other Affiliations
1.	Research Organization of Science and Technology Research Centre for Palaeoclimatology
2.	Kinugasa Research Organization Research Center for the Pan-Pacific Civilization

Academic background
1.	～2009/03	Doctoral Program (1st Semester) │ Department of Earth and Planetary Sciences │ Graduate School of Science │ Graduate school of Science, Kobe University │ Completed
2.	～2011/03	Doctoral Program (2nd Semester) │ Department of Earth and Planetary Sciences │ Graduate School of Science │ Graduate school of Science, Kobe University │ Completed
3.	2011/03 Degree Acquisition	│ Kobe University Doctor of Science
4.	～2008/03	Department of Earth and Planetary Sciences │ Faculty of Science │ Kobe University │ Graduated

Business career
1.	2022/04/01 ～	Associate Fellow │ │ Ritsumeikan Advanced Research Academy (RARA)
2.	2012/12/01 ～ 2014/09/30	Assistant Professor │ Graduate school of Science, │ Kobe University,
3.	2012/12/01 ～ 2014/09/30	Assistant Professor │ Faculty of Science, │ Kobe University,
4.	2012/10/01 ～ 2014/09/30	Assistant Professor │ Research Center for Inland Seas, │ Kobe University
5.	2012/04/01 ～ 2012/09/30	Researcher │ Research Center for Inland Seas, │ Kobe University
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Research activities
1.		American Geophysical Union
2.		Japan Association for Quaternary Research

Subject of research
1.	Climate and sea-level changes during the Mid-Pleistocene Climate Transition (MPT)
2.	Climate change and migration of Homo erectus to Indonesia
3.	Development of marker grains, specifically for palynology (PALYNOSPHERES)
4.	Environmental history of ancient American civilizations
5.	Geomagnetic and solar impacts on climate
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Research summary
Elucidation of climate change mechanism What does change the climate of Earth? In order to draw close to its mechanism, the history of climate and marine environment of the Earth recorded in sediments is studies. Small fossils like pollens and diatoms (algae that are distributed widely in fresh and sea water) that exist in the sediments contain records of the Earth’s environment in the past, and will teach us how the climate and marine environment of the Earth have changed. By deciphering these records, attempts are being made to find the answer to the questions of "How and when did the Earth change its climate system?", "Did the climate of the Earth change when the magnetic shield of the Earth and Sun became weak?", and "Did this affect the people and culture?", etc. At the same time, study is also made on how records of environmental information are made in the sediments from today’s environment.

Present specialized field
Palaeoclimatology, Geology, Stratigraphy/Paleontology, Environmental dynamic analysis (Keyword：Palaeoclimate, Cosmoclimatology, Mechanism of climate change, Palaeomagnetism, Quaternary)

Papers
1.	2020/05	Constraints on the timing of explosive volcanism at Aso and Aira calderas (Japan) between 50 and 30 ka: New insights from the Lake Suigetsu sedimentary record (SG14 core) │ Geochemistry, Geophysics, Geosystems │
2.	2020/01	Age control of the first appearance datum for Javanese Homo erectus in the Sangiran area │ Science │ 367 (6474),pp.210-214
3.	2020/01	Refining the eruptive history of Ulleungdo and Changbaishan volcanoes (East Asia) over the last 86 kyrs using distal sedimentary records. │ Journal of Volcanology and Geothermal Research │ 389 (106669)
4.	2019/06	Geochemical characterisation of the Late Quaternary widespread Japanese tephrostratigraphic markers and correlations to the Lake Suigetsu sedimentary archive (SG06 core) │ Quaternary Geochronology │ 52,pp.103-131
5.	2018/03	Integrating the Holocene tephrostratigraphy for East Asia using a high-resolution cryptotephra study from Lake Suigetsu (SG14 core), central Japan │ Quaternary Science Reviews │ 183,pp.36-58
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Academic conference presentation
1.	2019/07/26	'Stable' hydroclimate is specific to a narrow temperature window: observations from Guatemalan varves, 1448±4 to 2015±0 CE
2.	2017/12	Selective cooling on land supports cloud formation by cosmic ray during geomagnetic reversals
3.	2017/05	Cosmic rays' impact on climate is likely caused by cloud formation mechanisms
4.	2016/12	Footprints of the Sun Left in a Tropical Lake
5.	2015/01	Spatio-temporal structure of deglacial climate change: climate changes reconstructed from varved sediments of Lake Ichi-no-megata, Northern Japan, and its correlation with global references
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Winning science prize
1.	2009/12	American Geophysical Union (AGU) Student Travel Grant Award 2009

Grants-in-Aid for Scientific Research -KAKENHI-
1.	2012/08 ～ 2014/03	Towards better calibration of the modern microfossil data in Osaka Bay, Japan against aquatic and terrestrial environments
2.	2012/04 ～ 2013/03	What causes a cooling event during geomagnetic reversals