Variations in summer monsoon intensity over the past 2000 years in southwestern Japan, as reconstructed from tree-ring oxygen isotopes

• Project/Area Number: 26740008
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Research Institute for Humanity and Nature
• Principal Investigator: Sano Masaki 総合地球環境学研究所, 研究部, プロジェクト上級研究員 (60584901)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 年輪年代学 / 東アジアモンスーン / 屋久島 / 気候復元 / 中世温暖期 / 小氷期 / ヤクスギ / 年輪 / 酸素同位体比 / モンスーン / 古気候復元

Outline of Final Research Achievements

A total of 21 core samples collected from living and dead trees of Japanese ceder in Yakushima Island were used to construct a 1772-year tree-ring oxygen isotope chronology. Response analysis with ambient meteorological stations indicated that the oxygen isotope ratios of this chronology were significantly and negatively correlated with relative humidity and amounts of precipitation. Overall, a relatively dry (wet) condition was found in the Medieval Warm Period (the Little Ice Age). In addition, a notable drying trend was identified in the 20th century.

Research Products

• [Int'l Joint Research] 忠北大学(韓国)
• [Int'l Joint Research] 成功大学(台湾)
• [Journal Article] 近世後期の琉球における気候変動災害の展開と社会応答 ―1780年代の災害と上からの村落立て直し― (2017)
  • Author(s): 山田浩世・佐野雅規
  • Journal Title: 首里城研究 Volume: 19 Pages: 4-19
  • Peer Reviewed
• [Journal Article] 日本近世における年貢上納と気候変動 ―近世史研究における古気候データ活用の可能性をさぐる― (2016)
  • Author(s): 鎌谷かおる・佐野雅規・中塚武
  • Journal Title: 日本史研究 Volume: 646 Pages: 36-56
  • Peer Reviewed
• [Journal Article] Inter- and intra-annual tree-ring cellulose oxygen isotope variability in response to precipitation in Southeast China (2016)
  • Author(s): Xu, C., Zheng, H., Nakatsuka, T., Sano, M., Li, Z., and Ge, J.
  • Journal Title: Trees Volume: - Issue: 3 Pages: 785-794
  • DOI: 10.1007/s00468-015-1320-2
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Potential utility of tree ring δ18O series for reconstructing precipitation records from the lower reaches of the Yangtze River, southeast China (2016)
  • Author(s): Xu, C., Ge, J., Nakatsuka, T., Yi, L., Zheng, H., and Sano, M.
  • Journal Title: Journal of Geophysical Research: Atmospheres Volume: 121 Issue: 8 Pages: 3954-3968
  • DOI: 10.1002/2015jd023610
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Tree-ring cellulose δ¹⁸O variability in pine and oak and its potential to reconstruct precipitation and relative humidity in central Japan (2015)
  • Author(s): Zhen Li, Takeshi Nakatsuka and Masaki Sano
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 49 Issue: 2 Pages: 125-137
  • DOI: 10.2343/geochemj.2.0336
  • NAID: 130005067936
  • ISSN: 0016-7002, 1880-5973
  • Year and Date: 2015-04-16
  • Peer Reviewed / Open Access
• [Journal Article] A multi-proxy reconstruction of spatial and temporal variations in Asian summer temperatures over the last millennium (2015)
  • Author(s): Shi, F., Ge, Q., Yang, B., Li, J., Yang, F., Ljungqvist, F., Solomina, O., Nakatsuka, T., Wang, N., Zhao, S., Xu, C., Fang, K., Sano, M., Chu, G., Fan, Z., Gaire, N., and Zafar, M.
  • Journal Title: Climatic Change Volume: 131 Issue: 4 Pages: 663-676
  • DOI: 10.1007/s10584-015-1413-3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A tree-ring cellulose δ18O-based July-October precipitation reconstruction since AD 1828, northwest Thailand. (2015)
  • Author(s): Chenxi Xu, Nathsuda Pumijumnong, Takeshi Nakatsuka, Masaki Sano, Zhen Li
  • Journal Title: Journal of Hydrology Volume: 527 Pages: 433-441
  • DOI: 10.1016/j.jhydrol.2015.02.037
  • Peer Reviewed
• [Journal Article] An optimized method for stable isotope analysis of tree rings by extracting cellulose directly from cross-sectional laths. (2015)
  • Author(s): Akira Kagawa, Masaki Sano, Takeshi Nakatsuka, Tsutomu Ikeda, Satoshi Kubo
  • Journal Title: Chemical Geology Volume: 393-394 Pages: 16-25
  • DOI: 10.1016/j.chemgeo.2014.11.019
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Oxygen isotopes as a valuable tool for measuring annual growth in tropical trees that lack distinct annual rings (2014)
  • Author(s): Xu, C., M. Sano, K. Yoshimura, T. Nakatsuka
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 48 Issue: 4 Pages: 371-378
  • DOI: 10.2343/geochemj.2.0312
  • NAID: 130004678557
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed
• [Presentation] 韓国・日本における年輪酸素同位体比データベースの構築と古材の年代測定に向けて (2017)
  • Author(s): 佐野雅規、李貞、對馬あかね、中塚武、Jeong-Wook Seo、安江恒
  • Organizer: 第67回日本木材学会大会
  • Place of Presentation: 九州大学・福岡市
• [Presentation] 近世日本における気候変動が米収量に及ぼす影響の評価 ― 樹木年輪と免定に基づく解析 (2016)
  • Author(s): 佐野雅規、鎌谷かおる、中塚武
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ・千葉市
• [Presentation] 年輪酸素同位体比データに基づく気候復元研究の現状と展望 (2016)
  • Author(s): 佐野雅規
  • Organizer: 第19回日本AMSシンポジウム×2016年度「樹木年輪」研究会
  • Place of Presentation: 国立歴史民俗博物館・佐倉市
  • Invited
• [Presentation] Societal responses to decadal-scale climate changes in Early Modern Japan revealed by tree-ring records and historical documents (2015)
  • Author(s): Sano, M., Yasue, K., Kimura, K., Chen, S.-H., Chen, I.-C., and Nakatsuka, T.
  • Organizer: The Third Conference of East Asian Environmental History (EAEH 2015)
  • Place of Presentation: Kagawa
  • Year and Date: 2015-10-22
  • Int'l Joint Research
• [Presentation] ummer monsoon variability over the past 1500 years in southwestern Japan, as reconstructed from oxygen isotope ratios in tree-ring cellulose (2015)
  • Author(s): Sano, M., Yasue, K., Kimura, K., and Nakatsuka, T.
  • Organizer: XIX INQUA 2015
  • Place of Presentation: Nagoya
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] ヤクスギ年輪の酸素同位体比による過去1500年間の夏季モンスーンの復元 (2015)
  • Author(s): 佐野雅規，木村勝彦，安江恒，中塚武
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 千葉市
  • Year and Date: 2015-05-24
• [Presentation] Hydroclimate variability in southwestern Japan over the last 1500 years reconstructed from oxygen isotope ratios in tree rings (2015)
  • Author(s): Sano, M., Yasue, K., Kimura, K., and Nakatsuka, T.
  • Organizer: EGU General Assembly 2015
  • Place of Presentation: Vienna
  • Year and Date: 2015-04-12
  • Int'l Joint Research
• [Presentation] A 1500-year hydroclimate record in southwestern Japan inferred from tree-ring δ18O (2015)
  • Author(s): Sano, M., Yasue, K., Kimura, K., and Nakatsuka, T.
  • Organizer: The 4th International Asian Dendrochronological Conference 2015
  • Place of Presentation: Kathmandu
  • Year and Date: 2015-03-09 – 2015-03-12
• [Presentation] Societal Adaptation to Climate Change: Integrating Palaeoclimatological Data with Historical and Archaeological Evidences (2014)
  • Author(s): Sano, M., and Nakatsuka, T.
  • Organizer: International Symposium on Multi-Hazard Approach in Mongolia
  • Place of Presentation: Nagoya
  • Year and Date: 2014-10-24
• [Presentation] 樹木年輪の酸素同位体比による東アジア夏季モンスーン変動の復元 (2014)
  • Author(s): 佐野雅規, 中塚武, Chenxi XU, Shin-Hao CHEN, I-Ching CHEN
  • Organizer: 2014年日本地理学会秋季学術大会
  • Place of Presentation: 富山
  • Year and Date: 2014-09-20 – 2014-09-22
• [Presentation] ヤクスギ年輪の酸素同位体比クロノロジーの構築 -夏季モンスーンの復元に向けて- (2014)
  • Author(s): 佐野雅規、安江恒、木村勝彦、中塚武
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02