• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Variation in the Earth's rotation and its relation to global climate change

Research Project

Project/Area Number 15K05038
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Astronomy
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

Soma Mitsuru  国立天文台, 光赤外研究部, 助教 (30187885)

Co-Investigator(Kenkyū-buntansha) 上田 暁俊  国立天文台, JASMINE検討室, 助教 (30332159)
谷川 清隆  国立天文台, 理論研究部, 特別客員研究員 (80125210)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords日月食・星食 / 地球自転変動 / 気候変動 / 位置天文学 / 歴史天文学 / 自転速度変動
Outline of Final Research Achievements

Ancient astronomical records in various countries were found with the help of collaborators of many countries and determining the variation of the Earth's rate of rotations in ancient times were performed using them. Especially we have found that there were some solar eclipses and lunar occultations recorded in the 6th century in China that are useful for our studies. In addition the sunrise and sunset times recorded in the calendars called Guchureki in the Heian Period in Japan were found to be very precise with an accuracy of 1 - 2 minutes. We have also determined the observation era and the latitude of the observation place of the celestial map found in the Kitora Tumulus, which is believed to have been constructed in around AD 700. The relation of the variation of the Earth's rotation to the global climate change was not been able to be fully clarified due to the lack of the proofs of the global climate change.

Academic Significance and Societal Importance of the Research Achievements

地球の自転速度が変動していることは20世紀前半に近代天文観測から証明された。古代における地球自転速度については、当時の日月食の観測記録から知られるが、当時の時刻の記録は精度が不十分なため、主に皆既日食と金環日食が観測された場所によって求められてきた。我々は、そのような新たな記録を日本のみならず、中国・韓国・インド・ニュージーランドなどの研究者と協力して探し出し、古代における地球自転速度変動の精密化を行った。地球自転変動は海水面の昇降、つまり地球全体の気候変動と関連しているはずであるが、それについては、現時点ではまだ充分には解明されていない。今後の研究が待たれる。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (69 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (19 results) Journal Article (19 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (22 results) (of which Int'l Joint Research: 19 results,  Invited: 13 results) Book (5 results) Funded Workshop (4 results)

  • [Int'l Joint Research] Northwest University(中国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Seoul National University of Education(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Indian Institute of Technology(インド)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Tehran(イラン)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research/Jawaharlal Nehru Planetarium/Indian Institute of Astrophysics(インド)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] National Time Service Center/Northwest University(中国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Korea Astronomy and Space Science Inst./Korea Univ. of Science and Technology(韓国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Royal Observatory of Belgium(ベルギー)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Inst. Maori Astron. Res. and Traditions(ニュージーランド)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] National Time Service Center(中国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Nat'l Inst. of Prakit Studies and Res./Jawaharlal Nehru Planetarium(インド)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] KASI/Korea Univ. of Science and Tech.(韓国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] SMART(ニュージーランド)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] National Time Service Center/Northwest University(中国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research(インド)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] Seoul National University of Education/Korea Astronomy and Space Sci Institute(韓国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] Victoria University of Wellington(ニュージーランド)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] Hebrew University of Jerusalem(イスラエル)

    • Related Report
      2015 Research-status Report
  • [Journal Article] A Transit of Venus Possibly Misinterpreted as an Unaided-Eye Sunspot Observation in China on 1874 December 92019

    • Author(s)
      Hisashi Hayakawa, Mitsuru Soma, Kiyotaka Tanikawa, David Michael Willis, Matthew Wild, Lee Macdonald, Shinsuke Imada, Kentaro Hattori, and Francis Richard Stephenson
    • Journal Title

      Solar Physics

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Specific Period When Maori Arrived in Aotearoa-New Zealand2019

    • Author(s)
      O. Simmonds and K. Tanikawa
    • Journal Title

      Proceedings of the Fifth Symposium on "Historical Astronomical Records and Modern Science"

      Volume: - Pages: 104-130

    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] ΔT from solar eclipses around 1415 AD2019

    • Author(s)
      K. Tanikawa, M. Soma, O. Simmonds, and K. Iwahashi
    • Journal Title

      Proceedings of the Fifth Symposium on "Historical Astronomical Records and Modern Science"

      Volume: - Pages: 131-138

    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] 御堂関白記の日出入時刻の精度2019

    • Author(s)
      相馬充,谷川清隆,渡辺瑞穂子
    • Journal Title

      第5回「歴史的記録と現代科学」研究会集録

      Volume: - Pages: 131-138

    • Related Report
      2018 Annual Research Report
  • [Journal Article] The reliability of records of observed solar eclipses in India and comparison with contemporaneous eclipse data from other countries2018

    • Author(s)
      Kiyotaka Tanikawa, Mitsuru Soma, B.S. Shylaja, and Mayank Vahia
    • Journal Title

      The Growth and Development of Astronomy and Astrophysics in India and the Asia-Pacific Region

      Volume: - Pages: 81-88

    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Derivation of the inclination of Mars' orbit in the Almagest2018

    • Author(s)
      Mitsuru Soma
    • Journal Title

      The Growth and Development of Astronomy and Astrophysics in India and the Asia-Pacific Region

      Volume: - Pages: 125-127

    • Related Report
      2018 Annual Research Report
  • [Journal Article] 『御堂関白記』の時刻制度2018

    • Author(s)
      相馬充、渡辺瑞穂子、谷川清隆
    • Journal Title

      国立天文台報

      Volume: 20

    • NAID

      40022475115

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ΔT from the solar eclipse on 754 June 25 observed in India and solar eclipse on 761 August 5 observed in China2018

    • Author(s)
      K. Tanikawa, M. Soma, Geetha Kydala Ganesha, and B.S. Shylaja
    • Journal Title

      第6回天文学史研究会集録

      Volume: - Pages: 46-53

    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Journal Article] キリスト処刑の日の特定2018

    • Author(s)
      相馬充、谷川清隆、佐藤洋一郎、谷川惠一、落合博志
    • Journal Title

      第6回天文学史研究会集録

      Volume: - Pages: 171-175

    • Related Report
      2017 Research-status Report
  • [Journal Article] Earth rotation derived from occultation records2016

    • Author(s)
      Mitsuru Soma and Kiyotaka Tanikawa
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 68(2),29 Issue: 2 Pages: 1-8

    • DOI

      10.1093/pasj/psw020

    • Related Report
      2016 Research-status Report 2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] キトラ古墳天文図の観測年代と観測地の推定2016

    • Author(s)
      相馬 充
    • Journal Title

      国立天文台報

      Volume: 18 Pages: 1-12

    • NAID

      40022474952

    • Related Report
      2016 Research-status Report 2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] ‘Greek’ Astronomy2016

    • Author(s)
      Kiyotaka Tanikawa
    • Journal Title

      「第5回天文学史研究会」集録

      Volume: - Pages: 34-50

    • Related Report
      2016 Research-status Report
  • [Journal Article] キトラ古墳天文図の解析2016

    • Author(s)
      相馬 充
    • Journal Title

      「第5回天文学史研究会」集録

      Volume: - Pages: 183-187

    • Related Report
      2016 Research-status Report
  • [Journal Article] Observations of the Annular Eclipse on 2012 May 21 by the General Public in Japan2015

    • Author(s)
      Mitsuru Soma
    • Journal Title

      Publications of the Korean Astronomical Society

      Volume: 30 Issue: 2 Pages: 753-755

    • DOI

      10.5303/pkas.2015.30.2.753

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] Historical Astronomy and Eclipses2015

    • Author(s)
      Kiyotaka Tanikawa and Mitsuru Soma
    • Journal Title

      Proceedings of Intensive Workshop on Ancient and Medieval Eclipse Data: Compilation of Eclipse Data and Examination of their Reliability

      Volume: 1 Pages: 1-15

    • Related Report
      2015 Research-status Report
  • [Journal Article] Reliability of Eclipse Records in Japanese Ancient Periods2015

    • Author(s)
      Mitsuru Soma and Kiyotaka Tanikawa
    • Journal Title

      Proceedings of Intensive Workshop on Ancient and Medieval Eclipse Data: Compilation of Eclipse Data and Examination of their Reliability

      Volume: 1 Pages: 49-52

    • Related Report
      2015 Research-status Report
  • [Journal Article] 『水左記』の日蝕記事の欠字をめぐって2015

    • Author(s)
      渡辺瑞穂子,相馬充,谷川清隆,上田暁俊
    • Journal Title

      「歴史的記録と現代科学」研究会集録

      Volume: 4 Pages: 100-107

    • Related Report
      2015 Research-status Report
  • [Journal Article] 世界の日食頻度2015

    • Author(s)
      上田暁俊,相馬充,谷川清隆
    • Journal Title

      「歴史的記録と現代科学」研究会集録

      Volume: 4 Pages: 108-115

    • Related Report
      2015 Research-status Report
  • [Journal Article] 宣明暦の計算(二十四気損益・ちょうじく積の計算の誤り)2015

    • Author(s)
      相馬充
    • Journal Title

      「歴史的記録と現代科学」研究会集録

      Volume: 4 Pages: 116-124

    • Related Report
      2015 Research-status Report
  • [Presentation] Historical records of eclipses and variations of ΔT: The seventh century2019

    • Author(s)
      Kiyotaka Tanikawa, Mitsuru Soma, and Anjing Qu
    • Organizer
      International Symposium on Astral Sciences in Asia
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 重修大明暦の日出入時刻2019

    • Author(s)
      相馬 充
    • Organizer
      第7回天文学史研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Observations of Planets in Ancient Japan2019

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      第7回天文学史研究会
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time System in the Heian Period in Japan Inferred from Mido-Kanpaku-Ki2018

    • Author(s)
      Mitsuru Soma
    • Organizer
      Cultures, Stars and Numbers: Intercultural Exchanges in East Asian Mathematics and Astronomy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Japanese Astronomy in the 7th and 8th Centuries2018

    • Author(s)
      Kiyotaka Tanikawa and Mitsuru Soma
    • Organizer
      Cultures, Stars and Numbers: Intercultural Exchanges in East Asian Mathematics and Astronomy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Sunrise and Sunset Times of the Chinese Chongxiu-Daming Calendar 重修大明暦 and Comparison with Those of Other Chinese Calendars2018

    • Author(s)
      Mitsuru Soma
    • Organizer
      The Second International Conference on History of Mathematics and Astronomy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ΔT in the first half of the seventh century --Suiko-eclipse and Y'angd`-eclipse--2018

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      The Second International Conference on History of Mathematics and Astronomy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ΔT around AD 14152018

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      第5回「歴史的記録と現代科学」研究会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 御堂関白記の日出入時刻の精度2018

    • Author(s)
      相馬充
    • Organizer
      第5回「歴史的記録と現代科学」研究会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] The Astronomical Aspect of the Locality of a Civilization2018

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      Indian Institute of Astrophysics Extramural Talk
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Date of Christ's Crucifixion2018

    • Author(s)
      Mitsuru Soma
    • Organizer
      Indian Institute of Astrophysics Extramural Talk
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Earth rotation determined from occultation records2018

    • Author(s)
      Mitsuru Soma
    • Organizer
      Importance of Records of Ancient Eclipses for History of Astronomy
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Short-term variations of Delta T and climate changes2018

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      Importance of Records of Ancient Eclipses for History of Astronomy
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ΔT from the solar eclipse on 754 June 25 observed in India2017

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      第6回天文学史研究会
    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] キリスト処刑の日の特定2017

    • Author(s)
      相馬 充
    • Organizer
      第6回天文学史研究会
    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Results from Recent Lunar Graze Observations2017

    • Author(s)
      Mitsuru Soma
    • Organizer
      7th International Workshop on Occultation and Eclipse
    • Place of Presentation
      Shahr-e Kord cities (イラン)
    • Year and Date
      2017-03-08
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ‘Greek’ Astronomy2016

    • Author(s)
      Kiyotaka Tanikawa
    • Organizer
      第5回天文学史研究会
    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2016-03-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] キトラ古墳天文図の解析2016

    • Author(s)
      相馬充
    • Organizer
      第5回天文学史研究会
    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2016-03-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 掩蔽観測の現代的意義2015

    • Author(s)
      相馬充
    • Organizer
      天体力学N体力学研究会2015
    • Place of Presentation
      SMBCイベントスペース(千葉県千葉市)
    • Year and Date
      2015-12-24
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] When and where were the observations made for the celestial map in the Kitora Tumulus?2015

    • Author(s)
      Mitsuru Soma
    • Organizer
      2015 International Symposium on Historical Astronomy
    • Place of Presentation
      ソウル(韓国)
    • Year and Date
      2015-09-23
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the eclipse of 延烏郎 and 細烏女 in Samguk-Yusa2015

    • Author(s)
      Kiyotaka Tanikawa and Mitsuru Soma
    • Organizer
      2015 International Symposium on Historical Astronomy
    • Place of Presentation
      ソウル(韓国)
    • Year and Date
      2015-09-23
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] キトラ古墳天文図の観測年代と観測地の推定2015

    • Author(s)
      相馬充
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学(兵庫県神戸市)
    • Year and Date
      2015-09-09
    • Related Report
      2015 Research-status Report
  • [Book] 第5回「歴史的記録と現代科学」研究会集録2019

    • Author(s)
      相馬充, 谷川清隆
    • Total Pages
      306
    • Publisher
      国立天文台
    • ISBN
      9784990738952
    • Related Report
      2018 Annual Research Report
  • [Book] 「第6回天文学史研究会」集録2018

    • Author(s)
      相馬充、谷川清隆
    • Total Pages
      180
    • Publisher
      国立天文台
    • ISBN
      9784990738945
    • Related Report
      2017 Research-status Report
  • [Book] 「第5回天文学史研究会」集録2016

    • Author(s)
      相馬充,谷川清隆
    • Total Pages
      192
    • Publisher
      国立天文台
    • Related Report
      2016 Research-status Report
  • [Book] Proceedings of Intensive Workshop on Ancient and Medieval Eclipse Data: Compilation of Eclipse Data and Examination of their Reliability2015

    • Author(s)
      Mitsuru Soma and Kiyotaka Tanikawa
    • Total Pages
      86
    • Publisher
      National Astronomical Observatory of Japan
    • Related Report
      2015 Research-status Report
  • [Book] 第4回「歴史的記録と現代科学」研究会集録2015

    • Author(s)
      相馬充,谷川清隆
    • Total Pages
      128
    • Publisher
      国立天文台
    • Related Report
      2015 Research-status Report
  • [Funded Workshop] 第7回天文学史研究会2019

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] 第5回「歴史的記録と現代科学」研究会2018

    • Related Report
      2017 Research-status Report
  • [Funded Workshop] 第6回天文学史研究会2017

    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Funded Workshop] 第5回天文学史研究会2016

    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2016-03-25
    • Related Report
      2015 Research-status Report

URL: 

Published: 2015-04-16   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi