Faculty Profiles - KITAGAWA, Hiroyuki

Papers - KITAGAWA, Hiroyuki

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Dolphins from a prehistoric midden imply long-term philopatry of delphinids around Tokyo Bay Invited Reviewed

Biological Journal of the Linnean Society 2023.11

Delta initiation under low sediment discharge: Insights from Holocene incised valley fills north of Tokyo Bay, central Japan Invited Reviewed International coauthorship

Susumu Tanabe, Wan Hong, Junghun Park, Hiroyuki Kitagawa

Marine Geology Vol. 463 2023.9

Examination of ΔR (local marine reservoir correction) Value in the Sea of Okhotsk Coast, Hokkaido

OMOTO Kunio, KITAGAWA Hiroyuki, HIRAKOCHI Tsuyoshi

Quarterly Journal of Geography Vol. 75 ( 2 ) page： 78 - 85 2023

Language：Japanese Publisher：The Tohoku Geographical Association

<p>　　A total of four paired terrestrial and marine samples were collected from the Oshamappu river site and the Tohtsurunuma 1 site of Shari town, in the northern part of Hokkaido. They were radiocarbon dated to determine the ΔR （local marine reservoir correction） value of northern Hokkaido, facing towards the Sea of Okhotsk, using the Marine 20 calibrations. The ΔR value of the Oshamappu river site was calculated to be －94±60 yr，while the ΔR values for Tohtsurunuma Pit 2 were 55±46 yr and 135±45 yr （Average was 95±64 yr）. New ΔR values differ from a re-calculated ΔR value （－323±42 yr） of the Tokoro shell mound, formally reported.</p>

DOI： 10.5190/tga.75.2_78

CiNii Research

Cave occupations in Southeastern Arabia in the second millennium BCE: Excavation at Mugharat al-Kahf, North-Central Oman

Miki T., Kuronuma T., Kitagawa H., Kondo Y.

Arabian Archaeology and Epigraphy Vol. 33 ( 1 ) page： 85 - 107 2022.11

Publisher：Arabian Archaeology and Epigraphy

This paper reports the results of excavation at Mugharat al-Kahf (WTN01) in Wādī Tanūf, North-central Oman. It also provides information on the nonmortuary and nonsedentary activities in central Oman during the Wādī Sūq period (2000–1600 BCE), as the subsistence and social arrangements of this period are the subject of much debate. Previous surveys had discovered a substantial amount of Wādī Sūq pottery at the site. This project took forward the excavation for further exploration. The excavation at Test Pit 1 identified Layers Ia and Ib, wherein pottery sherds, charred date stones and other samples for radiocarbon dating were discovered. These prove the cave's occupation during the early third millennium BCE, early second millennium BCE and the Islamic period. The analysis of artefacts and floral remains provided insights into the sojourn, storage and consumption of dates in the cave, and the mobile lifestyle in central Oman.

DOI： 10.1111/aae.12210

Scopus

Luminescence dating of Holocene sediment cores from a wave-dominated and mountainous river delta in central Vietnam

Qiaola S., Nguyen T.M.L., Ta T.K.O., Nguyen V.L., Gugliotta M., Saito Y., Kitagawa H., Nakashima R., Tamura T.

Quaternary Geochronology Vol. 70 2022.5

Publisher：Quaternary Geochronology

Sediments of river deltas provide valuable records of past coastal environments. Optically-stimulated luminescence (OSL) dating has become an alternative to radiocarbon dating for constraining the sediment chronology in large deltas that allow for sufficient sunlight bleaching of sediments during the fluvial transport. However, its applicability to smaller deltas with mountainous riverine systems has not been confirmed yet. To check this, we examine multiple signals from two Holocene sediment cores in the wave-dominated Thu Bon River delta in central Vietnam. Two cores were collected, respectively, 3.9 km and 1.2 km inland from the present shoreline and both show a >-25-m thick succession of coarsening-upward mud to sand deposits. Coarse grains (180–250 μm in diameter) of quartz and K-feldspar, and fine grains (4–11 μm in diameter) of quartz and polymineral were extracted from the upper and lower parts of the cores for multi-grain measurements of quartz OSL, and of feldspar infrared-stimulated luminescence (IRSL) at 50 °C (IR50) and post-IR IRSL at 175 °C (pIRIR175) to determine burial ages. In addition, facies analysis and radiocarbon dating were conducted. The landward core consists of transgressive to early regressive estuarine and prodelta facies, which is overlain by a sandy beach-shoreface facies. The seaward core consists of a relatively simple shallowing-upward succession from muddy prodelta facies to sandy beach-shoreface facies. All luminescence ages except for pIRIR175 of fine grains are mostly consistent with the radiocarbon ages. Instead, pIRIR175 ages of fine grains are significantly overestimated with variable offsets. OSL and IR50 of fine grains provide reasonable age estimates, as these grains were likely well bleached during the transport even along a short and steep mountainous river. Consistent age estimates of all signals from sand indicate that sand was well-bleached in the beach and shoreface owing to the frequent sediment reworking by waves and currents. These results support the hypothesis that luminescence dating is applicable to Holocene wave-dominated deltas and reiterate that comparing different luminescence signals is an effective way to check reliability of the age estimates in environments where the sunlight bleaching is not ensured.

DOI： 10.1016/j.quageo.2022.101277

Scopus

Evolution of the Kikugawa Lowland based on sediment core analysis

Hori Kazuaki, Ishii Yuji, Tamura Toru, Sato Yoshiki, Ianazaki Tomio, Nakanishi Toshimichi, Kitagawa Hiroyuki, Hirouchi Daisuke, Mitoma Kayo, Matta Nobuhisa

Proceedings of the General Meeting of the Association of Japanese Geographers Vol. 2022s ( 0 ) page： 158 2022

Language：Japanese Publisher：The Association of Japanese Geographers

<p>The topographic features such as marine terraces and coastal plains and their sediments have been used to study the crustal movement and tsunami history associated with the repeated earthquakes in the Nankai Trough. In order to extract valuable information on crustal movement and tsunamis through the analysis of these landforms and sediments, it is necessary to clarify the relationship between the landforms and strata formation and glacial sea-level change. We report the results of analysis of sediment cores obtained from the Kikugawa lowland in the eastern part of the Enshunada and discuss the formation process of the Kikugawa lowland.</p>

DOI： 10.14866/ajg.2022s.0_158

CiNii Research

The spatio-temporal structure of the Lateglacial to early Holocene transition reconstructed from the pollen record of Lake Suigetsu and its precise correlation with other key global archives: Implications for palaeoclimatology and archaeology

Nakagawa T., Tarasov P., Staff R., Bronk Ramsey C., Marshall M., Schlolaut G., Bryant C., Brauer A., Lamb H., Haraguchi T., Gotanda K., Kitaba I., Kitagawa H., van der Plicht J., Yonenobu H., Omori T., Yokoyama Y., Tada R., Yasuda Y.

Global and Planetary Change Vol. 202 2021.7

Publisher：Global and Planetary Change

Leads, lags, or synchronies in climatic events among different regions are key to understanding mechanisms of climate change, as they provide insights into the causal linkages among components of the climate system. The well-studied transition from the Lateglacial to early Holocene (ca. 16–10 ka) contains several abrupt climatic shifts, making this period ideal for assessing the spatio-temporal structure of climate change. However, comparisons of timings of past climatic events among regions often remain hypothetical because site-specific age scales are not necessarily synchronised to each other. Here we present new pollen data (n = 510) and mean annual temperature reconstruction from the annually laminated sediments of Lake Suigetsu, Japan. Suigetsu's 14C dataset is an integral component of the IntCal20 radiocarbon calibration model, in which the absolute age scale is established to the highest standard. Its exceptionally high-precision chronology, along with recent advances in cosmogenic isotope studies of ice cores, enables temporally coherent comparisons among Suigetsu, Greenland, and other key proxy records across regions. We show that the onsets of the Lateglacial cold reversal (equivalent to GS-1/Younger Dryas) and the Holocene were synchronous between East Asia and the North Atlantic, whereas the Lateglacial interstadial (equivalent to GI-1/Bølling-Allerød) started ca. two centuries earlier in East Asia than in the North Atlantic. Bimodal migration (or ‘jump’) of the westerly jet between north and south of the Tibetan plateau and Himalayas may have operated as a threshold system responsible for the abruptness of the change in East and South (and possibly also West) Asia. That threshold in Asia and another major threshold in the North Atlantic, associated with switching on/off of the Atlantic meridional overturning circulation (AMOC), were crossed at different times, producing a multi-centennial asynchrony of abrupt changes, as well as a disparity of climatic modes among regions during the transitional phases. Such disparity may have disturbed zonal circulation and generated unstable climate during transitions. The intervening periods with stable climate, on the other hand, coincided with the beginnings of sedentary life and agriculture, implying that these new lifestyles and technologies were not rational unless climate was stable and thus, to a certain extent, predictable.

DOI： 10.1016/j.gloplacha.2021.103493

Scopus

Breakthrough in purification of fossil pollen for dating of sediments by a new large-particle on-chip sorter

Kasai Y., Leipe C., Saito M., Kitagawa H., Lauterbach S., Brauer A., Tarasov P.E., Gosla T., Arai F., Sakuma S.

Science Advances Vol. 7 ( 16 ) 2021.4

Language：English Publisher：Science Advances

Particle sorting is a fundamental method in various fields of medical and biological research. However, existing sorting applications are not capable for high-Throughput sorting of large-size (100 micrometers) particles. Here, we present a novel on-chip sorting method using traveling vortices generated by on-demand microjet flows, which locally exceed laminar flow condition, allowing for high-Throughput sorting (5 kilohertz) with a record-wide sorting area of 520 micrometers. Using an activation system based on fluorescence detection, the method successfully sorted 160-micrometer microbeads and purified fossil pollen (maximum dimension around 170 micrometers) from lake sediments. Radiocarbon dates of sorting-derived fossil pollen concentrates proved accurate, demonstrating the method's ability to enhance building chronologies for paleoenvironmental records from sedimentary archives. The method is capable to cover urgent needs for high-Throughput large-particle sorting in genomics, metabolomics, and regenerative medicine and opens up new opportunities for the use of pollen and other microfossils in geochronology, paleoecology, and paleoclimatology.

DOI： 10.1126/sciadv.abe7327

Scopus

PubMed

アラビア半島におけるホモ・サピエンスの定着:オマーン内陸部ワディ・タヌーフ1号洞穴遺跡の土層堆積状況と年代について

近藤康久, 北川浩之

「パレオアジア文化史学」計画研究A03　2020年度研究成果報告書(PaleoAsia Project Series 31　) Vol. 31 page： 1 - 4 2021

ホモ・サピエンスの拡散モデルの構築に向けた過去25万年間の気候変動の再現

北川浩之

「パレオアジア文化史学」計画研究A03　2020年度研究成果報告書(PaleoAsia Project Series ) Vol. 34 page： 13 - 17 2021

Revised chronology of the ICDP Dead Sea deep drill core relates drier-wetter-drier climate cycles to insolation over the past 220 kyr

Goldstein S.L., Kiro Y., Torfstein A., Kitagawa H., Tierney J., Stein M.

Quaternary Science Reviews Vol. 244 2020.9

Publisher：Quaternary Science Reviews

The Dead Sea Deep Drilling Project drilled 456 meters into the deepest floor of the Dead Sea and recovered a record of the past ∼220 kyr of the Levant hydroclimate history, that is, Marine Isotope Stages 1–7, including the last three interglacials and the last two glacials. We present an updated chronology of the core from DSDDP Hole 5017-1-A, from the Dead Sea's deepest basin, that refines our previous chronology (Torfstein et al. 2015) based on new information. The updated chronology uses the following approaches: (1) radiocarbon ages of Kitagawa et al. (2017); (2) correlation of specific layers in the core with U–Th-dated sediments on the Dead Sea margin, particularly during the interval of glacial Lake Lisan (MIS 2,3,4); (3) tuning of the δ18O data of DSDDP core aragonite to the U–Th dated oxygen isotopes of regional cave speleothems; and (4) tuning of the DSDDP aragonite δ18O data to summer insolation curves when the cave δ18O chronology is less clear. The updated chronology reveals a strong relationship between the sedimentary facies comprising the core and Northern Hemisphere summer insolation variations. It shows that sequences of sediments marking drier/wetter/drier climate conditions in the lake's watershed (e.g., salt/muds/salt, respectively) appear across the flank/peak/flank segments of several summer insolation peaks. In particular, the transition from drier to wetter sedimentary facies during mid-latitude insolation peaks coincides with the intervals of sapropel conditions in the Mediterranean, reflecting enhanced Nile flow due to intense African monsoonal conditions, and marking the impact of the tropical precession cycles on Eastern Mediterranean hydroclimate. This pattern was lost during MIS 2,3,4, when mostly sequences of primary aragonite are punctuated by gypsum precipitation during Heinrich events, marking the strong impact of the North Atlantic on the last glacial Levant hydroclimate.

DOI： 10.1016/j.quascirev.2020.106460

Scopus

A protocol for using attenuated total reflection Fourier-transform infrared spectroscopy for pre-screening ancient bone collagen prior to radiocarbon dating

Naito Y.I., Yamane M., Kitagawa H.

Rapid Communications in Mass Spectrometry Vol. 34 ( 10 ) page： e8720 2020.5

Language：English Publisher：Rapid Communications in Mass Spectrometry

Rationale: Pre-screening of bone collagen quality is important to reduce the cost for analyses such as radiocarbon (14C) dating with accelerator mass spectrometry in archaeological studies. We developed a pre-screening protocol based on attenuated total reflection (ATR) Fourier-transform infrared spectroscopy (FTIR) for assessing the chemical composition and mineralogy of ancient bone samples. Methods: ATR-FTIR measurements were performed on bulk bones of diverse origin and age before collagen extraction. The percentage nitrogen of bulk bones, as well as the weight percentage, and the percentage carbon and nitrogen of extracted organic matter were noted. Several machine learning algorithms were applied to the spectral data and compared for their efficacy in screening for well preserved collagen. Results: The results showed that (a) the first derivative of the spectral data was better suited to screening than the raw FTIR data, especially for a wider spectral range and (b) certain classification algorithms [e.g. gradient boosting machine (GBM)] were able to efficiently predict the degree of preservation in bone samples. Conclusions: This pre-screening protocol can serve as a fast, concise and inexpensive pre-screening tool for determining relative degrees of preservation before collagen extraction and subsequent 14C dating. The screening power based on the machine learning techniques can be further improved by accumulating the FTIR spectral data of bones.

DOI： 10.1002/rcm.8720

Web of Science

Scopus

PubMed

ホモ・サピエンスのアジアへの拡散モデルの構築（2）―気候・環境への適応 International coauthorship

北川浩之

パレオアジア文化史学, 計画研究A03 令和元年度研究報告書 Vol. 2019 page： 33 - 36 2020

パキスタンThar砂漠堆積物のOSL年代による石器年代の制約 International coauthorship

田村亨, 北川浩之

パレオアジア文化史学, 計画研究A03 令和元年度研究報告書 Vol. 2019 page： 23 - 28 2020

ホモ・サピエンスのアジアへの拡散モデルの構築（1）－気候の類似性

北川浩之

パレオアジア文化史学, 計画研究A03 平成30年度研究報告書 (PaleoAsia Project Serise) Vol. 20 page： 39 - 44 2019

Radiocarbon chronology of the dsddp core at the deepest floor of the dead sea

Kitagawa H., Stein M., Goldstein S.L., Nakamura T., Lazar B.

Radiocarbon Vol. 59 ( 2 ) page： 383 - 394 2017.4

Publisher：Radiocarbon

This study establishes the chronological framework of the sedimentary sequence deposited Dead Sea, ICDP 5017-1, Radiocarbon chronology during the past 50 ka at the deepest part of the Dead Sea (the ICDP 5017-1 site), which was recovered by the Dead Sea Deep Drilling Project (DSDDP) under the auspices of the International Continental Scientific Drilling Program (ICDP). The age-depth model is constructed using 3814C dates of terrestrial plant remains in a composite 150-m-long profile, generated by anchoring 32 marker layers identified in five cores. The sedimentary records at the ICDP 5017-1 site fills gaps in those obtained from the exposed sections at the high margins of the lake, particularly in times of lake-level retreat, and allows for a high-resolution comparison between the lake’s margins and deepest floor.

DOI： 10.1017/RDC.2016.120

Scopus

Radiocarbon Chronology of the DSDDP Core at the Deepest Floor of the Dead Sea Reviewed

Kitagawa, H., M. Stein, S. L. Goldstein, T. Nakamura, B. Lozar

Radiocarbon Vol. 59 ( 2 ) page： 383-394 2017

Evidences for centennial dry periods at ~3300 and ~2800 cal. yr BP from microfacies analyses of the Dead Sea sediments

1. I. Neugebauer, A. Brauer, M. J. Schwab, P. Dulski, U. Frank, E. Hadzhiivanova, H. Kitagawa, T. Litt, V. Schiebel, N. Taha and N. D Waldmann, DSDDP Scientific Party

The Holocene 2015

Quantitative analysis of intraspecific variations in the carbon and oxygen isotope compositions ofthe modern cool-temperate brachiopod Terebratulina

2. H. Takayanagi, R. Asami, T. Otake, O. Abe, T. Miyajima, H. Kitagawa, Y. Iryu

Geochimica et Cosmochimica Acta 2015

Characteristics of 14C and 13C of carbonate aerosols in dust storm events in China Reviewed

( 164-165 ) page： 297-303 2015

East Asian Monsoon controls on the inter-annual variability in precipitation isotope ratio in Japan Reviewed

N. Kurita, Y. Fujiyoshi, T. Nakayama, Y. Matsumi, H. Kitagawa

Clim. Past. Vol. 11 page： 339-353 2015

炭素14年代法による高精度年代決定と編年モデル構築

北川浩之

ぶんせき Vol. 2 page： 52-57 2014

Lithologies and depositional environments of the last two climatic cycles in the deep hypersaline Dead Sea: New observations from the ICDP Dead Sea Deep Drilling Project (DSDDP) Reviewed

I. Neugebauer, N. D Waldmann, M. J Schwab, A. Brauer, Y. Enzel, H. Kitagawa, U. Frank, P. Dulski, A. Agnon, D. Ariztegui, Z. Ben-Avraham, S. L. Goldstein, M. Stein

Quaternary Science Reviews ( 102 ) page： 149-165 2014

Water pH and temperature in Lake Biwa from MBT0/CBT indices during the last 280000 years Reviewed

T. Ajioka, M. Yamamoto, K. Takemura, A. Hayashida, and H. Kitagawa

Clim. Past ( 10 ) page： 1843–1855 2014

Integration of the old and new lake Suigetsu (Japan) terrestrial radiocarbon calibration data sets. Reviewed

R. A Staff, G. Schlolaut, C. Bronk Ramsey, F. Brock, C. L Bryant, H. Kitagawa, J. van der Plicht, M. H. Marshall, A. Brauer, H. F. Lamb, R. L Payne, P. Tarasov, T. Haraguchi, K. Gotanda, H. Yonenobu,Y. Yokoyama,T. Nakagawa, Suigetsu 2006 Project Members

Radiocarbon Vol. 55 ( 2 ) page： 2049–2058 2013.8

水月湖年縞堆積物の14C年代測定

北川浩之

Isotope News Vol. 4 page： 15-19 2013

放射性炭素年代測定―最近10年間の進展

北川浩之

月刊地球号外 Vol. 35 ( 9 ) page： 494-501 2013

Determining the age of the Kawagodaira eruption in Japan by wiggle matching and estimation of regional age offset

Radiocarbon Vol. 55 ( 2 ) page： 2049-2058 2013

An approach toward automatic graphitization of CO2 samples for AMS 14C measurements Reviewed

S. Nagasawa, H. Kitagawa, T. Nakanishi, S. Tanabe, W. Hong

Nuclear Instruments and Methods in Physics Research B Vol. 294 page： 266-269 2012

CO2-laser decomposition method of carbonate for AMS 14C measurements Reviewed

H. Kitagawa

Nucl. Instr. and Meth. in Phys. Res. B Vol. 294 page： 218-220 2012

A complete terrestrial radiocarbon record for 11.2 to 52.8 kyr B.P. Reviewed

C. Bronk Ramsey, R. A. Staff, C. L. Bryant, F. Brock, H. Kitagawa, J. van der Plicht, G. Schlolaut, M. H. Marshall, A. Brauer, H. F. Lamb, R. L. Payne, P. E. Tarasov, T. Haraguchi, K. Gotanda, H. Yonenobu, Y. Yokoyama, R. Tada, T. Nakagawa

Science Vol. 338 page： 370-374 2012

Carbon- and oxygen-isotope compositions of a modern deep-water brachiopod Campagea japonica collected off Aguni-jima, Central Ryukyu Islands, southwestern Japan Reviewed

H. Takayanagi, R. Asami, O. Abe, H. Kitagawa, T. Miyajima and Y. Iryu

Geochemical Journal Vol. 46 ( 2 ) page： 77-87 2012

琵琶湖における過去5万年間の火山灰と堆積物 Reviewed

竹村恵二・岩部智紗・林田明・檀原　徹・北川浩之・原口強・佐藤智之・石川尚人

第四紀研究 Vol. 49 ( 3 ) page： 147-160 2010

Radiocarbon content of lignin-enriched fraction in core sediment from Lake Biwa, central Japan Reviewed

H. Kitagawa, J. Lim, K. Takemura, A. Hayashida, T. Haraguchi

Nucl. Instr. and Meth. in Phys. Res. B Vol. 268 page： 1077-1079 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The transport and deposition of terrestrially derived organic matter (TOM) into lake and ocean is a key
but poorly constrained aspect of the modern global carbon cycle. An attempt has been done for estimating
a transport time of TOM from the drainage basin of Lake Biwa, the largest lake in Japan. We have
determined the 14C contents of the lignin-enriched fraction of the core sediment from the central part
of Lake Biwa. The age of lignin-enriched fraction at the deposition time was estimated to be 7.5 103
years for the last glacial interval. Even in Lake Biwa with more than 100 rivers from the relatively small
drainage basin (3850 km2), TOM was transported at very long time (>103 years).

Element and mineral characterization of dust emission from the saline land at Songnen Plain, Northeastern China Reviewed

02. B. Chen B, H. Kitagawa, K. Hu, DM. Jie, JP Yang, JM. Li

Journal of Environmental Science-China Vol. 21 ( 10 ) page： 1363-1370 2009

A similar to 30,000-year record of environmental changes inferred from Lake Chen Co, Southern Reviewed

LP. Zhu, XL. Zhen XL, JB. Wang JB, HY. Lu HY, MP. Xie MP, H. Kitagawa, G. Possnert G.

Journal of Paleolimnology Vol. 42 ( 3 ) page： 343-358 2009

Coral Sr/Ca and Mg/Ca records in Con Dao Island off the Mekong Delta: Assessment of their potential for monitoring ENSO and East Asian monsoon Reviewed

T. Mitsuguchi, Dang, X. Phong, H. Kitagawa, M. Uchida and Y. Shibata

Global and Planetary Change Vol. 63 ( 4 ) page： 341-352 2008

Dust transport from the northeastern China inferred from carbon stable isotopes of atmospheric dust carbonate. Amospheric Environment Reviewed

B. Chen, H. Kitagawa, D. Jie, K. Hu, J. Lim

Amospheric Environment Vol. 42 page： 4790-4796 2008

Late-Holocene vegetation changes and human impact in the Changbai Mountains area, Northeast China. Reviewed

M. Makohonienko, H. Kitagawa, T. Fujiki, X. Liu, Y. Yasuda and H. Yin

Quaternary International Vol. 184 page： 94-108 2008

Transition of solar cycle length in association with the occurrence of grand solar minima indicated by radiocarbon content in tree-rings. Reviewed

Vol. 3 ( 3 ) page： 208-212 2008

*Radiocarbon concentration of lake sediment cellulose from Lake Erhai in southwest China Reviewed

H. Kitagawa, S. M. Tareq, H. Matsuzaki, N. Inoue, E. Tanoue and Y. Yasuda

Nucl. Instr. and Meth. in Phys. Res. B Vol. 259 page： 526–529 2007

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

To improve age models for lake sediment cores without suitable 14C dating materials such as terrestrial plant fossils, we investigated the radiocarbon dating of lake sediment cellulose. The cellulose fraction in the sediments was obtained by a sequential decomposition of other organic matter, and subsequently dated by AMS. In general, 14C ages of the lake sediment cellulose obtained from a 10-m sediment core from Lake Erhai on the Yunnan-Guizhou Plateau are in agreement with 14C dates from terrestrial plant fossils. For the early Holocene, however, differences of up to 1000 14C years are observed between lake sediment cellulose and terrestrial plant fossils. This disagreement is probably caused by the contribution of 14C-depleted cellulose synthesized by aquatic plants/algae in the lake. To obtain a precise

Magnesium isotope analysis of different chlorophyll forms in marine phytoplankton using multi-collector ICP-MS Reviewed

K. Ra and H. Kitagawa

J. Anal. At. Spectrom. Vol. 22 page： 817-821 2007

Language：English Publishing type：Research paper (scientific journal)

A new separation method of magnesium in the different chlorophyll forms, including chlorophyll a, b, c1 + c2 and c3, of phytoplankton, was developed for isotope measurements. Our method is based on a two-step separation using HPLC and a C18 column. The method made it possible to determine the magnesium isotopes (d25Mg and d26Mg) of the particular chlorophyll forms in marine living phytoplankton with a high precision using a multi-collector ICP-MS. The differences of d26Mg values among commercial chlorophylls (four types of chlorophyll a and two types of chlorophyll b) and the different chlorophyll forms of marine diatom-rich phytoplankton collected from the Northwest Pacific show variations of 1.5% and 0.65%, respectively. We found a slight enrichment in the heavier magnesium isotopes in chlorophylls relative to sea-water: 0.58%, 0.74%, 0.27% and 0.35% on d26Mg for chlorophyll a, b, c1 + c2 and c3, respectively. Our data suggest a mass dependent fractionation of magnesium isotopes among species of photosynthetic organisms and the chlorophyll forms. The magnesium isotope analysis by chlorophyll forms might not only give a new insight into the biosynthetic pathways associated with chlorophylls but also be a potential environmental indicator preserved in marine phytoplankton and other photosynthetic organisms.

Environmental Magnetic Record and Paleosecular Variation Data for the Last 40 Kyrs from Lake Biwa Sediments, Central Japan. Reviewed

A. Hayashida, M. Ali, Y. Kuniko, H. Kitagawa, M. Torii, K. Takemura

Earth, Planets and Space Vol. 59 page： 807-814 2007

Tropical South China Sea Surface 14C record in an annually-banded coral Reviewed

T. Mitsuguchi, Dang, X. Phong, H. Kitagawa, M. Yoneda and Y. Shibata

Radiocarbon Vol. 47 ( 2 ) 2007

Variation of solar cyclicity during the Spoerer Minimum Reviewed

H. Miyahara, K. Masuda, Y. Muraki, H. Kitagawa and T. Nakamura

J. of Geophysical Research (Space Physics) Vol. 111 ( A3 ) page： A03103 2006.3

Sr/Ca ratio of Porites coral from Con Dao Island, South of Vietnam Reviewed

Dang, X. Phong, T. Mitsuguchi, H. Kitagawa, T. Uchida and Y. Shibata

Proc. of 10th Int'l Coral Reef Symposium page： 567-571 2006

Seasonally specific responses of the East Asian monsoon to deglacial climate changes Reviewed

T. Nakagawa, P. E. Tarasov, H. Kitagawa, Y. Yasuda and K. Gotanda

Geology Vol. 34 ( 7 ) page： 521-524 2006

Language：English Publishing type：Research paper (scientific journal)

The deglacial meltwater pulse in the North Atlantic that induced the Younger Dryas event also prompted climate cooling in East Asian monsoon regions such as Japan and coastal mid latitude China. However, very little is understood about the mechanism that can transmit changes in the North Atlantic to the Far East. Here we show that the shutdown of the North Atlantic thermohaline circulation brought about significantly lower temperatures and higher precipitation in the Japanese winter, whereas the change in the Japanese summer climate was considerably smaller. The cooling of the Siberian air mass seems to have caused an increased pressure gradient between Siberia and the West Pacific in winter, intensifying the winter monsoon. The Mongolian high pressure system and the westerly jet stream played an important role in the teleconnection. In contrast, the warming at the onset of the late glacial interstadial (GI-1; Bølling-Allerød) in the West Pacific did not have season-specific features, implying that the principal driving mechanism of this warming event may lie in a panhemispheric or global factor, such as insolation changes.

Seasonal changes of alkaline dust aerosol and its climatic influencing factors in western Songnen Plain, North-east China Reviewed

B. Chen, H, Ke, J. Dong-mei, H. Kitagawa and F. Li

Acta Scientiae Circumstantiae Vol. 26 ( 3 ) page： 521-527 2006

Pollen/event stratigraphy of the varved sediment of Lake Suigetsu, central Japan from 15,701 to 10,217 SG vyr BP (Suigetsu varve years before present): Description, interpretation, and correlation with other regions Reviewed

T. Nakagawa, H. Kitagawa, Y. Yasuda, P. E. Tarasov, K. Gotanda and Y. Sawai

Quaternary Science Reviews Vol. 24 page： 1691–1701 2005

Eolian quartz flux variations in Cheju Island, Korea, during the last 6500 yr and a possible Sun–monsoon linkage Reviewed

J. Lim, E. Matsumoto and H. Kitagawa

Quaternary Research Vol. 64 page： 12–20 2005

韓国南東部・蔚山断層の古地　震活動－慶州市葛谷里における第2次トレンチ調査－ Reviewed

木康弘・岡田篤正・竹村恵二・慶　在福・廣内大助・金　幸隆・伊藤　愛・大石　超・中村洋介・成瀬敏郎・北川浩之・渡辺満久

活断層研究 Vol. 25 page： 147-152 2005

Late Quaternary faulting along the western margin of the Poronaysk Lowland in central Sakhalin, Russia Reviewed

H. Tsutsumi, Y. Suzuki, A. I. Kozhurin, M. I. Strel'tsov, T. Ueki, H. Goto, K. Okumura, R. F. Bulgakov and H. Kitagawa

Tectonophysics Vol. 407 page： 257-268 2005

The earliest record of major anthropogenic deforestation in the Ghab Valley, northwest Syria: a palynological study Reviewed

Y. Yasuda, H. Kitagawa and T. Nakagawa

Quaternary International Vol. 123/125 page： 127-136 2004

Radiocarbon contents in tree rings during the Sporer Minimum Reviewed

H. Miyahara, K. Masuda, Y. Muraki, T. Uemura, M. Kato, H. Toyoizumi, H. Furuzawa, T. Nakamura, H. Kitagawa and E. Matsumoto

Nucl. Instr. and Meth. in Phys. Res. B Vol. 233/224 page： 655-659 2004

High-resolution 14C analyses of annually-banded coral skeletons from Ishigaki Island, Japan: Implications for oceanography Reviewed

T. Mitsuguchi, H. Kitagawa, E. Matsumoto, Y. Shibata, M. Yoneda, T. Kobayashi, T. Uchida and N. Ahagon

Nucl. Instr. and Meth. in Phys. Res. B Vol. 223/224 page： 455-459 2004

Marin reservoir age in the south of Vietnam estimated from an annually-banded coral skeleton Reviewed

Dang X. Phong, T. Mitsuguchi, H. Kitagawa, Y. Shibata and T. Kobayashi

Radiocarbon Vol. 46 ( 2 ) page： 657-660 2004

Environmental archaeology at the Chengtoushan site, Hunan Province, China, and implications for environmental change and the rise and fall of the Yangtze River civilization Reviewed

Y. Yasuda, T. Fujiki, H. Nasu, M. Kato, Y. Morita, Y. Mori, M. Kanehara, S. Toyama, A. Yanoa, M. Okuno, H.

Quaternary International Vol. 123/125 page： 149-158 2004

Late-Holocene natural and anthropogenic vegetation changes in the Dongbei Pingyuan (Manchurian Plain), northeastern China Reviewed

M. Makohonienkoa, H. Kitagawa, T. Naruse, H. Nasu, A. Momohara, M. Okuno, T. Fujiki, X. Liug, Y. Yasuda and H. Ying

Quaternary International Vol. 123/125 page： 71-88 2004

Variation of the radiocarbon content of tree rings during the Spoerer Minimum Reviewed

H. Miyahara, K. Masuda, H. Furuzawa, Y. Muraki, T. Nakamura, H. Kitagawa and K. Arslanov:

Radiocarbon Vol. 46 ( 2 ) page： 965-968 2004

Late Holocene vegetation and environment at Cauduntou, west of Yangtze Delta, SW Jiangsu Province, East China Reviewed

M. Okuda, Y. Sato, L. H. Tang, M. Takahashi, S. Toyama, A. Yano, H. Kitagawa and Y. Yasuda

Quaternary International Vol. 123/125 page： 39-47 2004

Seasonal variations in settling fluxes of major components in the oligotrophic Shikoku Basin, the western North Pacific: coincidence of high biogenic flux with Asian dust supply in spring Reviewed

T. Li, T. Masuzawa and H. Kitagawa

Marine Chemistry Vol. 91 page： 187-210 2004

Flux and characteristics of the alkaline dusts in west Jilin province, China Reviewed

B. Chen, K, Hu, J. Dong-mei and H. Kitagawa

Ecology and Environment Vol. 13 ( 2 ) page： 191-193 2004

Holocene evolution, of the outer lake of Hwajinpo Lagoon on the eastern coast of Korea; environmental changes with Holocene sea-level fluctuation of the East Sea (Sea of Japan)

J. G. Yum, K. M. Yu, K. Takemura, T. Naruse, A. Kitamura, H. Kitagawa and J. C. Kim

Radiocarbon Vol. 46 ( 2 ) page： 797-808 2004

Seasonal and secular variations of atmospheric 14CO2 over the Western Pacific since 1994 Reviewed

H. Kitagawa, H. Mukai, N. Nojiri, Y. Shibata, T. Kobayashi and T. Nojiri

Radiocarbon Vol. 46 ( 2 ) page： 643-648 2004

Language：English Publishing type：Research paper (scientific journal)

Air sample collections over the western Pacific have continued since 1992 as a part of Center for Global Environmental Research, National Institute for Environmental Studies (CGER-NIES) global environmental monitoring program. The air samples collected on the Japan-Australia transect made it possible to trace the seasonal and secular 14CO2 variations, as well as an increasing trend of greenhouse gases over the western Pacific. A subset of CO2 samples from latitudes of 10–15°N and 23–28°S were chosen for accelerator mass spectrometry (AMS) 14C analysis using a NIES-TERRA AMS with a 0.3–0.4% precision. These 14CO2 records in maritime air show seasonal variations superimposed on normal exponential decreasing trends with a time constant of about 16 yr. The Δ14C values in the Northern Hemisphere are lower those in the Southern Hemisphere by 3–4‰ during 1994–2002. The Northern Hemisphere record shows relatively high seasonality (2.3 ± 1.5‰) as compared with the Southern Hemisphere (1.3 ± 1.2‰). The maximum values of seasonal cycles appear in late autumn and early winter in the Northern and Southern Hemispheres, respectively. Oscillations of 1–10 yr over the western Pacific are found to correlate possibly with the El Niño/Southern Oscillation (ENSO) events.

*Asychronous climatic changes in the North Atlantic and Japan during the Last Termination Reviewed

T. Nakagawa, H. Kitagawa, Y. Yasuda, Pavel E. Tarasov, K. Nishida, K. Gotanda, Y. Sawai and Yangtze River Civilization Program Members

Science Vol. 299 page： 688-691 2003

加速器質量分析法 Reviewed

北川浩之

ケミカルエンジニャリング Vol. 48 ( 10 ) page： 14-18 2003

Monsoon changes and eolian dust deposition over the past 30,000 years in Cheju Island, Korea Reviewed

Y. Yatagi, K. Takemura, T. Naruse, H. Kitagawa, H. Fukusawa, M-H. Kim and Y. Yasuda

Transactions, Japanese Geomorphological Union Vol. 23 ( 5 ) page： 821-831 2002

Timing of sea-transgression during the past 2000 years in Akkeshi Low-land, Hokkaido, Northern Japan Reviewed

Y. Sawai and H. Kitagawa

Proc. 15th diatom Symposium page： 225-261 2002

加速器質量分析法 Invited

北川浩之

ぶんせき ( 2003-3 ) page： 128-132 2002

H. Hideshima, E. Matsumoto, O. Abe and H. Kitagawa Reviewed

Marine Reservoir correction of NW Pacific estimated from an annually banded coral of Ishigaki Island, southern Japan

Radiocarbon Vol. 43 ( 2A ) page： 473-476 2001

Coral reef evolution at the leeward side of Ishigaki Island, southwest Japan Reviewed

H. Yamano, O. Abe, H. Kitagawa, E. Niu and T. Nakamura

Radiocarbon Vol. 43 ( 2B ) page： 899-908 2001

The earliest record of major anthropogenic deforestation in the Ghab Valley, northwest Syria: a palynological study Reviewed

Vol. 73/74 page： 127-136 2000

Vegetation and climate history since the last interglacial in Kurota Lowland, western Japan Reviewed

T. Takahara and H. Kitagawa

Palaeogeography, Palaeoclimatology and Paleoecology Vol. 115 page： 123-134 2000

Pollen–derived history of timber exploitation from the Roman period onwards in the Romanche valley, central French Alps Reviewed

T. Nakagawa, de Beaulieu and H. Kitagawa

Vegetation history and Archaeobotany Vol. 9 ( 2 ) page： 85-89 2000

Atmospheric radiocarbon calibration beyond 11,900 cal BP from Lake Suigetsu laminated sediments Reviewed

Vol. 42 ( 3 ) page： 369-380 2000

Pre-bomb marine reservoir ages in the western Pacific: Preliminary results on Kyoto University collection Reviewed

M. Yoneda, H. Kitagawa, J. van der Plicht, M. Uchida, A. Tanaka, Y. Shibata, Morita, M. and T. Ohno

Nucl. Instr. and Meth. in Phys. Res. B Vol. 172 page： 377-381 2000

湖沼堆積物の宇宙線起源同位体分析による宇宙・太陽・地球環境変動の解読 Invited

北川浩之

月刊地球 Vol. 22 ( 3 ) 2000

中国遼寧省新賓市北四平の泥炭層の花粉分析 Reviewed

尹懐寧・安田喜憲・北川浩之・北川淳子・藤木利之・山口健太郎

日本花粉学会誌 Vol. 45 ( 1 ) page： 71-77 1999

宮本真二・安田喜憲・北川浩之・竹村恵二 Reviewed

福井県蛇ヶ上湿原における過去14000年間の環境変遷

日本花粉学会誌 Vol. 45 ( 1 ) page： 7-14 1999

炭素14年代測定の現状と新展開 Invited

北川浩之

月刊地球 ( 26号外 ) page： 43-49 1999

堆積物の年輪に注目した炭素14年代時計の補正 Invited

北川浩之

Isotope News page： 2-5 1998.9

*Atmospheric radiocarbon calibration to 45,000 BP: late glacial fluctuations and cosmogenic isotope production Reviewed

H. Kitagawa and J. van der Plicht

Science Vol. 279 page： 1187-1190 1998

A 40,000-year varve chronology from Lake Suigetsu, Japan: extension of the radiocarbon calibration curve

H. Kitagawa and J. van der Plicht

Radiocarbon Vol. 40 ( 1 ) page： 505-515 1998

屋久杉年輪の炭素同位体比変動から推定される過去2000年間の気候変動 Invited

北川浩之・松本英二

気候研究ノート Vol. 191 page： 1-13 1998

地球環境解析のための宇宙からのトリガー Invited

北川浩之

日本物理学会誌 Vol. 53 page： 6-12 1998

Enrichment of sub-milligram size carbon samples Reviewed

H. Kitagawa and J. van der Plicht

Nucl. Instr. and Meth. in Phys. Res. B Vol. 123 page： 218-220 1997

Lake level changes and development of alluvial fans in Lake Tuz and the Konya basin during the last 24000 years on the Anatolian Plateau, Turkey

T. Naruse, H. Kitagawa and H. Matsubara

Japan Rev Vol. 8 page： 173-192 1997

Radiocarbon dating of plant remains and lipids in core sediments from Lake Kestel, Turkey. Reviewed

H. Kitagawa, Y. Yasuda, M. Nishimura and T. Nakamura

Japan Rev. Vol. 8 page： 229-234 1997

炭素14キャリブレーション年代域の拡大と湖沼堆積物 Invited

北川浩之

月刊地球 Vol. 19 ( 8 ) page： 487-490 1997

マーカー・グレインを用いた絶対花粉分析法の検討 Reviewed

山口健太郎・安田喜憲・北川浩之・大野照文

日本花粉学会誌 Vol. 43 page： 223-234 1997

Radiocarbon dating at the International Research Center for Japanese Studies Reviewed

Vol. 9 page： 223-234 1997

Sedimentary facies of a 60.85 m core from Konya Basin, Turkey Reviewed

H. Kitagawa and Y. Yasuda

Japan Rev. Vol. 8 page： 167-172 1997

年縞堆積物から復元された三方湖とその周辺の最終氷期最寒冷期の古環境変動 Reviewed

福沢仁之・竹村恵二・林田明・北川浩之・安田喜憲

地形 Vol. 17 page： 323-341 1996

Paleoenvironments in the last glacial maximum around the Naka-ikemi more, Fukui Prefecture, central Japan Reviewed

S. Miyamoto, Y. Yasuda and H. Kitagawa

Geographical reports of Tokyo Metropolitan University Vol. 31 page： 131-147 1996

福井県・敦賀市、中池見湿原堆積物の層相と年代 Reviewed

宮本真二・安田喜憲・北川浩之

地学雑誌 Vol. 104 ( 6 ) page： 865-873 1995

14Cキャリブレーション年代域の拡大 Invited Reviewed

北川浩之

第四紀研究 Vol. 34 ( 3 ) page： 185-190 1995

*Climatic implications of d13C variations in a Japanese cedar (Cryptomeria Japonica) during the last two millennia Reviewed

H. Kitagawa and E. Matsumoto

Geophys. Res. Letters Vol. 22 ( 6 ) page： 2215-2158 1995

Carbon isotope variations within trunks of Japanese cedars from the Yakushima Island, southern Japan Reviewed

H. Kitagawa and E. Matsumoto

Geochemical J. Vol. 29 page： 149-153 1995

Carbon isotope variations within trunks of Japanese cedars from the Yakushima Island, southern Japan

H. Kitagawa and E. Matsumoto

Geochemical J. Vol. 29 page： 149-153 1995

AMS 14C dating of varved sediments from Lake Suigetsu, central Japan and atmospheric 14C change during the last Pleistocene Reviewed

H. Kitagawa, H. Fukusawa, T. Nakamura, M. Okamura, K. Takemura, A. Hayashida and Y. Yasuda

Radiocarbon Vol. 37 ( 2 ) page： 371-378 1995

AMS 14C measurements of dissolved inorganic carbon in pore water from a deep-sea “cold seep"giant claim community off Hatsushima Island, Sagami Bay, Japan Reviewed

T. Masuzawa, H. Kitagawa, T. Nakatsuka, N. Handa and T. Nakamura

Radiocarbon Vol. 37 ( 2 ) page： 617-627 1995

Seasonal variations in 14C concentrations of stratospheric CO2 measured with accelerator mass spectrometry Reviewed

T. Nakamura, T. Nakazawa, H. Handa, H. Kitagawa, T. Machida, A. Ikeda and E. Matsumoto

Nucl. Instr. and Meth. in Phys. Res. B Vol. 123 page： 218-220 1994

岩石磁気・古地磁気測定による水月湖の堆積環境変化の研究 Reviewed

糸田千鶴・兵頭政幸・林田明・北川浩之・安田喜憲

日本大学理学部自然科学研究所研究紀要 Vol. 28 page： 55-60 1994

屋久杉に環境変動を探る Invited

北川浩之

朝日百科「動物たちの地球」 ( 138 ) page： 14 1994

C14年代が正確な年代に直結した Invited

北川浩之

科学朝日 ( 1994年14月号 ) page： 33-34 1994

竹村恵二・北川浩之・林田明・安田喜憲 Reviewed

三方湖・水月湖・黒田低地の堆積物の層相と年代－三方低地の最終間氷期以降の堆積環境－

地学雑誌 Vol. 103 ( 3 ) page： 233-242 1994

d13C records of a Japanese cedar from Yakushima Island and past atmospheric CO2 Reviewed

H. Kitagawa and E. Matsumoto

Geochemical. J. 27(6) Vol. 27 ( 6 ) page： 391-396 1993

三方湖表層堆積物中の花粉出現率の分布 Reviewed

中川毅・安田喜憲・北川浩之・田端英雄

日本花粉学会誌 Vol. 39 ( 1 ) page： 21-30 1993

*A batch preparation method for graphite targets with low background for AMS 14C measurements Reviewed

H. Kitagawa, T. Masuzawa, T. Nakamura and E. Matsumoto

Radiocarbon Vol. 35 ( 2 ) page： 295-300 1993

Seaonal and secular d13C variations in annual growth rings of a Japanese cedar tree from Mt. Amagi, Izu Peninsula, central Japan Reviewed

H. Kitagawa and H. Wada

Geochemical J. Vol. 27 ( 6 ) page： 391-396 1993

Measurement of 14C concentrations of stratospheric CO2 by accelerator mass spectrometry Reviewed

T. Nakamura, T. Nakazawa, N. Nakai, H. Kitagawa, H. Handa, T. Itoh, T. Machida and E. Matsumoto

Radiocarbon Vol. 34 ( 3 ) page： 745-752 1992

炭素14年代法－少量試料の炭素14年代測定 Reviewed

北川浩之

国際日本文化研究センター紀要「日本研究」 Vol. 6 page： 103-113 1992

Sulfate reduction using methane in sediments beneath a bathyal “cold seep" giant clam community off Hatsushima Island, Sagami Bay, Japan. Reviewed

T. Masuzawa, N. Handa, H. Kitagawa and M. Kusakabe

Earth and Plane. Science Letters Vol. 110 page： 39-50 1992

潜水調査用現場間隙水抽出装置による相模湾初島沖海底生物群集堆積物からの間隙水の採集：その2（「しんかい2000」第521潜行）

増澤敏行・北川浩之・半田暢彦

海洋技術センター試験研究報告JAMSTECTR DEEPSEA RESEARCH page： 7-15 1991

Paleomagnetic dating of a core from Lake Suigetsu, Cental Japan Reviewed

Itota, C., Hyodo, M., Hayashida, A., Kitagawa, H. and Y. Yasuda

Rock magnetism and Paleogeophysics Vol. 18 page： 31-35 1991

潜水調査用現場間隙水抽出装置による相模湾初島沖海底生物群集堆積物からの間隙水の採集「しんかい2000」第449潜行）

増澤敏行・北川浩之・半田暢彦

海洋技術センター試験研究報告JAMSTECTR DEEPSEA RESEARCH page： 197-204 1990

杉材セルロースの炭素同位体比－測定法及び杉材年輪１層内の変化

北川浩之

静岡大学地球科学報告 Vol. 13 page： 25-30 1987

丹那断層面剥ぎ取り転写法

北川浩之・和田秀樹

静岡地学 ( 51 ) page： 1-4 1985

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