| FUKUMA Koji |  |
| Faculty of Science and Engineering Department of Environmental Systems Science | |
| Associate Professor |
Last Updated :2024/10/04
Researcher Profile and Settings
researchmap
Research Interests
Research Areas
Research Experience
- 同志社大学理工学部, 2008 - Today
- Doshisha University, 2004 - 2008
- 熊本大学大学院自然科学研究科博士後期課程, 2000 - 2004
- 熊本大学大学院自然科学研究科博士前期課程, 2000 - 2004
- Kumamoto University, Faculty of Science, 1999 - 2004
- 科学振興事業団 特別研究員（海洋科学技術センター）, 1997 - 1999
- Postdoctoral Fellow (University of Toronto), 1995 - 1997
- 日本学術振興会 特別研究員（京都大学理学部）, 1993 - 1995
Education
- Kyoto University, 理学研究科, 地質学鉱物学専攻, - 1993
- Kyoto University, 理学研究科, 地質学鉱物学専攻, - 1988
- Kyoto University, Faculty of Science, - 1986
Degree
Association Memberships
Published Papers
- Quaternions for Rotations in Paleomagnetism
Koji Fukuma
Mathematical Geosciences, Sep. 2023, Scientific journal - Testing determinations of Thellier paleointensities on 1962 and 1983 lava flows and scoriae in Miyakejima, Japan
Koji Fukuma
Earth, Planets and Space, 75(1), Mar. 2023, Scientific journal - Orienting paleomagnetic drill cores using a portable GPS compass
Koji Fukuma; Tetsuo Muramatsu
Earth, Planets and Space, 74(1), Sep. 2022, Scientific journal - The Quaternary Kurobegawa Granite: an example of a deeply dissected resurgent pluton
Hisatoshi Ito; Yoshiko Adachi; Aitor Cambeses; Fernando Bea; Mayuko Fukuyama; Koji Fukuma; Ryuji Yamada; Takashi Kubo; Mami Takehara; Kenji Horie
Scientific Reports, Springer Science and Business Media LLC, 11(1), Dec. 2021, Scientific journal - A LabVIEW software for Thellier paleointensity measurements with an automated three-component spinner magnetometer TSpin
Koji Fukuma; Masaru Kono
Earth, Planets and Space, 68(1), Dec. 2016, Scientific journal - Absolute calibration of low- and high-field magnetic susceptibilities using rare earth oxides
Koji Fukuma; Masayuki Torii
Geochemistry, Geophysics, Geosystems, 12(8), Sep. 2011, Scientific journal - Three-dimensional micromagnetic modeling of randomly oriented magnetite grains (0.03-0.3 μm)
Koji Fukuma; David J. Dunlop
Journal of Geophysical Research: Solid Earth, 111(12), 04 Dec. 2006, Scientific journal - Micromagnetic Modeling and its Implications for Paleointensity Studies
FUKUMA Koji
Journal of Geography (Chigaku Zasshi), Tokyo Geographical Society, 114(2) 250 - 257, 2005 - A Late Cretaceous paleomagnetic pole Koto rhyolite, southwest Japan: Implications for eastern margin deformation of Asia
Koji Fukuma; Hisashi Tsurudome; Masayuki Torii
Journal of Geophysical Research: Solid Earth, 108(11), 10 Nov. 2003, Scientific journal - Is amino acid chronology applicable to the estimation of the geological age of siliceous sediments?
Naomi Harada; Tomomi Kondo; Koji Fukuma; Masao Uchida; Toshio Nakamura; Masao Iwai; Masafumi Murayama; Toshikatsu Sugawara; Masashi Kusakabe
Earth and Planetary Science Letters, 198(3-4) 257 - 266, 2002, Scientific journal - Mineral magnetic study of the Taklimakan desert sands and its relevance to the Chinese loess
M. Torii; T. Q. Lee; K. Fukuma; T. Mishima; T. Yamazaki; H. Oda; N. Ishikawa
Geophysical Journal International, 146(2) 416 - 424, 2001, Scientific journal - Grain-size dependence of two-dimensional microgmagnetic structures for pseudo-single-domain magnetite (0.2-2.5 μm)
Koji Fukuma; David J. Dunlop
Geophysical Journal International, 134(3) 843 - 848, Oct. 1998, Scientific journal - Origin of the absence of magnetic lineations in the Yamato Basin of the Japan Sea: Magnetic properties of mafic rocks from Ocean Drilling Program Hole 794D
Koji Fukuma; Hironao Shinjoe; Yozo Hamano
Journal of Geophysical Research: Solid Earth, AMER GEOPHYSICAL UNION, 103(8) 17791 - 17805, 10 Aug. 1998, Scientific journal - Pliocene-Pleistocene magnetostratigraphy of sedimentary sequences from the Irminger Basin
K. Fukuma
Proceedings of the Ocean Drilling Program: Scientific Results, 152 265 - 269, May 1998, Scientific journal - Origin and applications of whole-core magnetic susceptibility of sediments and volcanic rocks from Leg 152
K. Fukuma
Proceedings fo the Ocean Drilling Program: Scientific Results, 152 271 - 280, May 1998, Scientific journal - Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence
Koji Fukuma; Masayuki Torii
Earth, Planets and Space, 50(1) 9 - 14, Mar. 1998, Scientific journal - Initial Magnetic Susceptibility of the Chinese Loess: a Review.
Torii Masayuki; Fukuma Koji
The Quaternary Research (Daiyonki-Kenkyu), Japan Association for Quaternary Research, 37(1) 33 - 45, Feb. 1998 - Monte Carlo simulation of two-dimensional domain structures in magnetite
Koji Fukuma; David J. Dunlop
Journal of Geophysical Research: Solid Earth, 102(B3) 5135 - 5143, 1997, Scientific journal - Magnetic discrimination of pyrrhotite- and greigite-bearing sediment samples
M. Torii; K. Fukuma; C. S. Horng; T. Q. Lee
Geophysical Research Letters, 23(14) 1813 - 1816, 1996, Scientific journal - Seven million years of glaciation in Greenland
H. C. Larsen; A. D. Saunders; P. D. Clift; J. Beget; W. Wei; S. Spezzaferri; J. Ali; H. Cambray; A. Demant; G. Fitton; M. S. Fram; K. Fukuma; J. Gieskes; M. A. Holmes; J. Hunt; C. Lacasse; L. M. Larsen; H. Lykke-Andersen; A. Meltser; M. L. Morrison; N. Nemoto; N. Okay; S. Saito; C. Sinton; R. Stax; T. L. Vallier; D. Vandamme; R. Werner
Science, 264(5161) 952 - 955, May 1994, Scientific journal - Rock magnetic properties of mafic rocks from the Middle Valley sedimented rift
Fukuma, K; U. Körner; H. Oda
Proceedings fo the Ocean Drilling Program: Scientific Results, 139 519 - 534, 1994 - Comments on "Field-strength dependence of directional dispersion in magnetizations of sediment samples: A statistical model and paleomagnetic evidence" by Hyodo and Itota
Koji Fukuma
J. Geomag. Geoelectr., 41 161 - 165, 1994 - A numerical simulation of magnetostatic coagulation in a fluid
Koji Fukuma
Geophysical Journal International, 111(2) 357 - 362, Nov. 1992, Scientific journal
MISC
- 東アジアの風成堆積物の磁気特性-古地磁気編年と環境復元をめざして-
林田明; 福間浩司; 横尾頼子; 浅井健司; 楊振宇
東アジアのレスー古土壌と旧石器編年、雄山閣, 57 - 66, 2008 - 海洋地球研究船「みらい」-その成果と将来-みらい採泥観測成果概要
原田尚美; 阿波根直一; 木元克典; 内田昌男; 坂本竜彦; 板木拓也; 成田尚史; 福間浩司
月刊海洋, 2003 - Paleointensity stratigraphy of north Pacific sediments.
福間浩司; 原田尚美
海洋科学技術センター試験研究報告, 海洋科学技術センタ-, 43(43) 83 - 91, 2001 - アミノ酸のラセミ化反応による年代測定法の進展
原田尚美; 近藤朋美; 福間浩司; 岩井雅夫; 日下部正志
月刊海洋, 32(9) 613 - 617, 2000 - General features of sediment cores collected in the Northwestern Pacific during the R/V "MIRAI" cruise MR98-05
N. Harada, K. Fukuma, M. Iwai, M. Murayama, T. Sugawara, M. Matsuhashi, K. Aoki, T. Kondo
JAMSTECR, 40(3) 113 - 124, 2000 - 黄土—古土壌磁化率述評
鳥居雅之; 福間浩司; 葱黎; 杜克玲; 方小敏
海洋地質与第四紀地質, 19 83 - 96, 1999 - General features of sediment cores collected during the R/V "MIRAI" cruise MR97-02
N. Harada, K. Fukuma, T. Kanamatsu, M. Iwai, T. Sugawara, H. Narita, M. Sato, H. Muraki, T. Kondo
JAMSTECR, 39 53 - 66, 1999 - マイクロ磁気学モデリング
福間 浩司
月刊地球, 17 48 - 53, 1997 - 堆積物の磁性を用いた過去の気候の復元
福間 浩司
化学工学, 61(9) 66 - 706, 1997 - Proceedings, initial reports, Ocean Drilling Program, Leg 152, East Greenland Margin
Hans Christian Larsen; Andrew D. Saunders; Peter D. Clift; Jason Richard Ali; James Beget; Hervé Cambray; Alain Demant; J. Godfrey Fitton; Miranda S. Fram; Koji Fukuma; Joris M. Gieskes; Mary Anne Holmes; John M. Hunt; Christian Lacasse; Lotte Melchior Larsen; Holger Lykke-Andersen; Alexandr Meltser; Martin L. Morrison; Naoki Nemoto; Nilgün Okay; Saneatsu Saito; Christopher Sinton; Silvia Spezzaferri; Rainer Stax; Tracy L. Valuer; Didier Vandamme; Wuchang Wei; Reinhard Werner
1994 - Dynamics of ocean floor.Sediments from the viewpoint of magnetic minerals and paleoenvironment.New development of rockmagnetics.
鳥居雅之; 福間 浩司
月刊地球, 9(Gogai 9) 179 - 183, 1994 - Rock magnetic properties of basaltic rocks formed at sediment-covered spreading centers
Koji Fukuma
Rock Magn. Paleogeophys., 19 1 - 6, 1992 - Coagulation due to magnetostatic interaction in fluids
Koji Fukuma
Rock Magn. Paleogeophys., 18 10 - 11, 1991 - Paleomagnetic pole from Late Cretaceous Koto Rhyolites, southwest Japan,
Koji Fukuma; Masayuki Torii
Rock Magn. Paleogeophys., 17 65 - 72, 1990 - Late Cretaceous paleomagnetic pole from the Koto Rhyolite, southwest Japan
Koji Fukuma; Masayuki Torii
Rock Magn. Paleogeophys., 13 26 - 29, 1986
Presentations
- Paleomagnetic results from the late Cretaceous Koto Rhyolite
福間浩司; 鳥居雅之
地球電磁気・地球惑星圏学会, Nov. 1990 - 単磁区粒子群による非履歴性残留磁化の獲得過程
福間浩司
地球電磁気・地球惑星圏学会, Apr. 1988 - 湖東流紋岩主岩体の古地磁気学的研究
福間浩司; 鳥居雅之
地球電磁気・地球惑星圏学会, Apr. 1986
Research Projects
- 過去400年間の地磁気強度の変化
福間 浩司; 伊藤 久敏
地球磁場の観測は約150年前から始まり，現在も世界中の地磁気観測所や人工衛星によって精密な機器測定が続けられている．しかし，150年前より古い時代には機器による測定データは存在しない．19世紀半ば以前には機器測定によるデータがない状況は，気象データなどと同様である．それ以前については文献に残された定性的な記述を読み解くか，プロキシと呼ばれる間接的なデータの拠るかしかできないのが通例である．しかし，地球磁場については，考古遺物や火山岩の残留磁化から直接復元することができる．私たちは試料採取と実験室での測定の両面から，古地球磁場強度の精度を機器測定に匹敵するレベルまで引き上げる試みを行ってきた．クリンカ試料を用いて加熱・冷却部と測定部が一体となった自動スピナー磁力計を使用すれば，24時間効率的に測定を進め，温度ステップも極めて柔軟に設定できる．試料採取と装置の両面の進歩により，既存のデータに比べてはるかに高い精度の古地球磁場強度を得ることで，太陽活動やその気候変動への影響を明らかにすることができる． ３年目である今年度は，南インド洋のレユニオン島で採取した溶岩試料を用いてテリエ法による地球磁場強度を求める測定をさらに進めた．溶岩の上部もしくは下部クリンカから採取した定方位のブロック試料について．パイロット試料を用いて熱消磁の結果からアンブロッキング温度の分布を求めることにより，温度ステップを試料毎に適切に定めて古地磁気強度測定を行った．厳格な判定基準を用いて解析をおこなった結果，66％のサンプルから古地磁気強度を得て，12地点中10地点で平均古地磁気強度を求めることができた．また，クリンカ試料からの古地磁気方向も信頼できることがわかり，過去の1000年間の南インド洋における最近の地球磁場の方向と強度を求めることができた．, 日本学術振興会, 科学研究費助成事業, 2019/04 -2024/03, Principal investigator, 基盤研究(C), 同志社大学 - Clarification of magmatic and tectonic evolution of Quaternary granite
Ito Hisatoshi
The entire magmatic and tectonic evolution history of the Earth’s youngest exposed granite, Kurobegawa Granite, Japan Alps, was investigated using mainly U-Pb dating and paleomagnetism. As a result, it was revealed that the granite was formed not by a single intrusion but by multiple intrusion episodes spanning from 2.5 million years ago to 0.8 million years ago. Moreover, the granite was cooled below the magnetization temperature of ~600 degrees C during the Brunhes chron (since 0.77 million years ago) and the Japan Alps has experienced a rapid uplift and erosion during this time period without significant tilting as opposed to a commonly accepted theory., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2016/04 -2019/03, Coinvestigator, Grant-in-Aid for Scientific Research (C), Central Research Institute of Electric Power Industry - Reconstruction of Holocene environmental changes based on magnetic properties of lacustrine and inner-bay sediments
Hayashida Akira; FUKUMA Koji; ANRAKU Kazuhiro; TAKANASHI Yutaro
Intending to contribute high-resolution chronology and environment study, we investigated magnetic properties of the Holocene lacustrine and inner-bay sediments, including remanent magnetization, variation of magnetic concentration, coercivity distribution and thermomagnetic properties. Although the sediments from brackish-water basins, Lake Ogawara and Lake Abashiri, had suffered loss of magnetic minerals possibly due to reductive diagenesis, high-coercivity magnetic minerals, hematite and goethite, were enhanced in the topmost sediment from the Haneji Inner-Bay and the Shioya Bay on Okinawa Island, suggesting significant runoff of red soils from the watershed. On the other hand, sediments from Ichi-no-megata, Beppu Bay and a fresh-water interval of Lake kushu are characterized by stable remanent magnetization. These results are correlative to the standard record from Lake Biwa, representing regional records of Holocene paleomagnetic secular variation of the Japanese Islands., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2015/04 -2018/03, Coinvestigator not use grants, Grant-in-Aid for Scientific Research (C), Doshisha University - Age determination of archeological materials based on the geomagnetic intensity
Fukuma Koji; ISOBE Hiroshi; SAITO TAKESHI
We performed archeointensity studies on archeological materials and volcanic rocks in order to construct the reference curve in Japan. Sekki pottery sherds evacuated from Doshisha University campus in Kyoto have proved to provide faithful records of the geomagnetic field. Jiki potteries whose weak magnetization is still measurable with a high-sensitivity magnetometer are promising targets to retrieve the records of the recent several centuries. Volcanic rocks assigned with document-based ages are most suitable for establishing the reference curve. By using rapidly cooled facies such as clinkers and scorias we observed ideal behaviors during the Thellier experiments. Therefore we did obtain the unparalleled high-quality archeointensity data from the volcanic rocks without any age uncertainties. A fully automated magnetometer, for which the controlling software was developed by ourselves, was quite useful for the Thellier measurements., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2012/04 -2016/03, Principal investigator, Grant-in-Aid for Scientific Research (C), Doshisha University - Basic Studies of the Paleo-environmental Changes and Paleolithic Chronology in Northeast Asia
MATSUFUJI Kazuto; HAYASHIDA Akira; WATANABE Mitsuhisa; KATO Shinji; FUKUMA Koji; YOKOO Yoriko; TSUMURA Giroomi; NARUSE Toshiro; MAGARA Hitoshi; NAKAGAWA Kazuya; KIKUCHI Kyoichi; TAKEHANA Kazuharu; HAYASE Ryosuke; UEMINE Atsushi; OMOTE Masamichi
Using loess-paleosol sequence synchronized with Marine Isotope Stages as a global standaerd, the stone assemblages from the multi cultural layers in the Mansuri site were reevaluated. We made reexamination about the real age for the controversial Houjiayao Paleolithic site in North China as well as the techno-typological analysis for the industry from the site. The sedimentary environment and geological date of the Sunabara site in Shimane Prefecture as the earliest Paleolithic (110-120ka) site in Japanese Islands was thoroughly elucidated., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2009 -2012, Coinvestigator not use grants, Grant-in-Aid for Scientific Research (A), Doshisha University - Geomagnetic field intensity variation deduced from oceanic crust
FUKUMA Koji; ISOBE Hiroshi; HAYASHIDA Akira
To clarify the variation of the geomagnetic field intensity is important in order to elucidate the effect of shielding against cosmic rays and solar wind by the geomagnetic field. Past geomagnetic field intensities were determined using the oceanic crust that was erupted continuously over the past 100 million years and has recorded the geomagnetic field at the time of cooling. We found that geomagnetic field intensities are reliably retrieved from rapidly-quenched glassy and cryptocrystalline part of pillow lavas at the top of the oceanic crust. In addition, we were able to establish a protocol for screening subaerial lavas based on various magnetic measurements., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2009 -2011, Principal investigator, Grant-in-Aid for Scientific Research (C), Doshisha University - Magnetic nano-particles from dust deposits in East Asia
FUKUMA Koji; ISOBE Hiroshi; HAYASHIDA Akira
中国沿岸部や韓国などの東アジアの湿潤地域では, アジア大陸内部からダストが間断なく供給されると同時に, 過去から現在まで人類が継続的に活動してきた痕跡が数多く残されており, 人類の活動と気候変動の影響を研究するための理想的なフィールドである. 中国沿岸域や韓国の旧石器遺跡のダスト堆積物について交流磁化率や磁気ヒステリシス特性の測定を行い, 磁性ナノ粒子の種類・含有量・粒径分布を求めた. 乾燥地域のダスト堆積物との比較から, 従来の磁気測定では解明できなかった湿潤地域の気候と磁性ナノ粒子の対応関係を明らかにすることができた., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2007 -2008, Principal investigator, Grant-in-Aid for Scientific Research (C), Doshisha University - 粘性残留磁化による定置年代の測定
福間 浩司; 渋谷 秀敏; 中村 浩
石器・礎石・石垣などの考古試料が定置された年代を,地球磁場中に置かれた時間に応じて獲得される粘性残留磁化を使って直接求める新しい方法に取り組んできた.過去2年間は須恵器の熱消磁による粘性残留磁化の分離をはじめサヌカイトや黒曜石の岩石磁気測定を行ってきた.本年度(平成17年度)は,世界各地の考古遺跡で発見される黒曜石を対象として,粘性残留磁化をもつ試料を選別するために低温における磁気測定から粒径分布を求める測定法とデータ解析法の開発に取り組んだ.低温(10-300K)のある一定の温度において2.5Tで獲得させた等温残留磁化を逆向きの磁場を段階的に加えることで直流消磁を行い,保磁力の分布を求める.10Kステップで温度を上昇させて同様の測定を繰り返し行うことにより様々な温度での保磁力分布が得られ,これをネールダイアグラムにプロットすることにより体積すなわち粒径の分布を得ることができた.得られた粒径分布から計算した交流磁化率の温度依存性は測定されたデータと非常によく一致し,走査型電子顕微鏡(FE-SEM)において計測された粒径とも対応し,低温直流消磁が信頼できる粒径分布を与える方法であることを示唆する.このことは黒曜石中に包含され分離することができない磁性鉱物についても粒径を求める新しい方法が得られたことになる.黒曜石中の磁性鉱物の粒径分布は産地により明瞭な違いがあり,粘性残留磁化によって定置年代を求めるために最も重要な要因であることがわかった., 日本学術振興会, 科学研究費助成事業, 2003 -2005, Competitive research funding, 萌芽研究 - Variation of dust input into the North Pacific Ocean
FUKUMA Koji; HAYASHIDA Akira; HARADA Naomi; SHIBUYA Hidetoshi
To investigate the impact of dust input on climate and ocean conditions, we studies the relationship between the variation of wind-driven dust input from the Eurasia continent into the North Pacific Ocean and the climate condition in this region. It has been known that many kinds of gases like carbon dioxide are exchanged vigorously between ocean and atmosphere in the North Pacific region, and that the amount of dust input into the ocean affects carbon dioxide content in the atmosphere and would lead to the global climate change. First, we established the age-depth relation for sediment cores collected from the North Pacific Ocean using paleointensity stratigraphy. In the North Pacific high temporal resolution records have been unavailable because existing dating methods such as C14 dating or oxygen isotope stratigraphy are not applicable to siliceous sediments occupying the North Pacific. We used U-channel samplers to cover the whole interval of cored sediments and measured natural remanent magnetizations at 2 cm intervals. The stability of natural remanent magnetization was examined using alternating field demagnetization and anhystretic remanent magnetization was used to normalize the intensity of natural remanent magnetization to detemine the paleointensity of geomagnetic field. Comparing the measured paleointesity data with well-dated paleointensity records, we could obtain the high-resolution age models on several sediment cores for the past 800 kyr. Second, dust input was estimated from the content and grain size variations of magnetic minerals. We measured magnetic hysteresis loops, magnetic moments at low temperature and thermomagnetic curves using a newly custom-made Curie balance. Two types of sediments are well distinguished from magnetic hysteresis measurements and they are responsible to variable oxidizing/reducing conditon. Based on the paleointensity stratigraphy we could obtain high-resolution temporal records of many kinds of magnetic properties and found that the variations of dust input and ocean condition in the North Pacific are well correlated to the glacial-interglacial cycle., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2002 -2003, Principal investigator, Competitive research funding, Grant-in-Aid for Scientific Research (B), Kumamoto University - 疑似単磁区粒子の３次元マイクロ磁気学モデリング
福間 浩司
住友財団, 基礎科学研究助成, 2001 -2003, Principal investigator, Competitive research funding - 深層水循環の磁気学的研究
福間 浩司
過去の深層水の変動を求めるため,深層水の沈み込む海域である北大西洋の海底堆積物試料の磁気異方性の測定を昨年度(平成12年度)に継続して行った.昨年度の予察的な磁化率異方性の測定によって,従来のサイズの数分の1である1ccの立方形試料を使っての測定が可能であることを確かめ,深層流による磁性鉱物の配列を示すと考えられる磁気ファブリックを見いだすことができた.しかし,流れによる配列は限られた粒径・形状を持つ粒子に顕著に現れるため,粒径・形状によって分別することができる部分的非履歴性残留磁化異方性がよりシャープなシグナルを与えることができる.非履歴性残留磁化を与えるためのコイルを設計し,特定の交流磁場の範囲で自動的に直流磁場をオンにすることができる回路を組み,高い精度で異方性を与えることができるアダプターをデザインした.非履歴性残留磁化異方性は,低保磁力の範囲で堆積物の圧密に伴うと考えられる扁平なファブリックを示し,高保磁力の範囲で深層流を反映している直線性のファブリックを示す. 一方,深層水の太平洋への流入経路にあたるニュージーランド沖の堆積物中の磁性鉱物の種類・量・粒径を調べるため,交番磁場勾配磁力計によって磁気ヒステリシスの測定を行った.磁性鉱物の含有量は極めて少なく,高感度の交番磁場勾配磁力計によっても測定は困難を極めたが,測定方法の改良によりノイズを抑えることができた.磁性鉱物の含有量は氷期・間氷期サイクルに応じて明瞭に変化し,基本的に氷期に低く間氷期に高くなる.しかし,氷期には含有量の鋭いピークも見られ,これらのピークはニュージーランドからの氷山の流出を示しているものと考えられる.磁気的性質からみた北大西洋の深層水沈み込みの数千年周期の変動,それに伴う流速を変化を示す磁気ファブリックの変化,さらにニュージーランド沖での深層水の太平洋への流入についての論文を執筆中である., 日本学術振興会, 科学研究費助成事業, 2000 -2001, Principal investigator, Competitive research funding, 奨励研究 (A), 熊本大学 - 堆積物における残留磁化の獲得機構と化学変化による影響
福間 浩司
日本学術振興会, 科学研究費助成事業, 1993 -1994, Principal investigator, Competitive research funding, 特別研究員奨励費