Study of veritcal coupling in the polar atmosphere by using multi instruments
Project/Area Number |
25287126
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Space and upper atmospheric physics
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Research Institution | Nagoya University |
Principal Investigator |
NOZAWA Satonori 名古屋大学, 宇宙地球環境研究所, 准教授 (60212130)
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Co-Investigator(Kenkyū-buntansha) |
OGAWA YASUNOBU 国立極地研究所, 国際北極環境研究センター, 准教授 (00362210)
FUJIWARA HITOSHI 成蹊大学, 理工学部, 教授 (50298741)
TSUTSUMI MASAKI 国立極地研究所, 研究教育系, 准教授 (80280535)
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Co-Investigator(Renkei-kenkyūsha) |
SAITO NORIHITO 国立研究開発法人理化学研究所, 光量子工学研究領域, 上級研究員 (90333327)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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Keywords | 大気上下結合 / 成層圏突然昇温 / 大気重力波 / 大気潮汐波 / スポラディックナトリウム層 / ナトリウムライダー / EISCATレーダー / トロムソ / 北極域下部熱圏 / 北極域中間圏 / EISCAT / SSL / 大気温度変動 / ジュール加熱 / 中性大気温度 / 対流不安定 / 力学的不安定 / 流星レーダー / 乱流 / オーロラ加熱 / 国際研究者交流 / ノルウェー |
Outline of Final Research Achievements |
We have studied the vertical coupling processes between atmospheres as well as between magnetosphere-ionosphere-thermosphere, mainly, based on observational data obtained with multi-instruments operated at Tromsoe (69.6N, 19.2E), Norway. Results are summarized as follows: (1) we investigated a dissipation process of a gravity wave, and proposed that the background temperature structure played a role, (2) we evaluated generation mechanisms of a sporadic sodium layer, and proposed a new generation mechanism that a normal sodium ion layer is a source for sodium atoms and the south-westward electric field played a role to transport sodium ions downward, (3) we derived a zonal wave number of semidiurnal tide during an SSW event, and pointed out discrepancy with model predictions, (4) we evaluated the derivation method of joule heating, and showed a care is needed for the derivation way by IS radar data, (5) we found sodium atom depletion due to auroral particle precipitations.
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Report
(4 results)
Research Products
(58 results)
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[Journal Article] A case study on generation mechanisms of a sporadic sodium layer above Tromsoe (69.6°N) during a night of high auroral activity2015
Author(s)
Takahashi, T., S. Nozawa, T. T. Tsuda, Y. Ogawa, N. Saito, T. Hidemori, T. D. Kawahara, C. Hall, H. Fujiwara, N. Matuura, A. Brekke, M. Tsutsumi, S. Wada, T. Kawabata, S. Oyama, and R. Fujii
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Journal Title
Ann. Geophys.
Volume: 33
Pages: 941-953
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] A sporadic sodium layer event detected with five-directional lidar and simultaneous wind2015
Author(s)
Tsuda, T. T., S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, C. M. Hall, M. Tsutsumi, Y. Ogawa, S. Oyama, T. Takahashi, M. K. Ejiri, T. Nishiyama, T. Nakamura, and A. Brekke
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Journal Title
Geophysical Research Letters
Volume: 42
Pages: 9190-9196
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Auroral fragmentation into patches2014
Author(s)
Shiokawa, K., A. Hashimoto, T. Hori, K. Sakaguchi, Y. Ogawa, E. Donovan, E. Spanswick, M. Connors, Y. Otsuka, S.-I. Oyama, S. Nozawa, K. McWilliams
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Journal Title
J. Geophys. Res.
Volume: 119
Pages: 8249-8261
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data2014
Author(s)
Takahashi, T., S. Nozawa, M. Tsutsumi, C. Hall, S. Suzuki, T. T. Tsuda, T. D. Kawahara, N. Saito, S. Oyama, S. Wada, T. Kawabata, H. Fujiwara, A. Brekke, A. Manson, C. Meek, and R.Fujii
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Journal Title
Ann. Geophys.
Volume: 32
Pages: 1195-1205
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Variations of the neutral temperature and sodium density between 80 and 107 km above Tromso during the winter of 2010-2011 by a new solid state sodium LIDAR2014
Author(s)
Nozawa, S., T. D. Kawahara, N. Saito, C. M. Hall, T. T. Tsuda, T. Kawabata, S. Wada, A. Brekke, T. Takahashi, H. Fujiwara, Y. Ogawa, and R. Fujii
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Journal Title
J. Geophys. Res.
Volume: 119
Pages: 441-451
DOI
Related Report
Peer Reviewed
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[Journal Article] The neutral dynamics during the 2009 sudden stratosphere warming simulated by different whole atmosphere models2014
Author(s)
Pedatella, N. M., T. Fuller-Rowell, H. Wang, H. Jin, Y.Miyoshi, H. Fujiwara, H. Shinagawa, H.-L. Liu, F. Sassi, H. Schmidt, V.Matthias, and L. Goncharenko
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Journal Title
J. Geophys. Res.
Volume: 119
Pages: 1306-1324
DOI
Related Report
Peer Reviewed
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[Journal Article] Decrease in sodium density observed during auroral particle precipitation over Tromsoe, Norway2013
Author(s)
Tsuda, T., S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, Y. Ogawa, S. Oyama, C. M. Hall, M. Tsutsumi, M. K. Ejiri, S. Suzuki, T. Takahashi, T. Nakamura
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Journal Title
Geophyscal Research Letters
Volume: 40
Pages: 4486-4490
DOI
Related Report
Peer Reviewed
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[Presentation] Sodium LIDAR observations above Tromso2016
Author(s)
Nozawa, S., S. Takita, T. Hibino, T. Kawabata, A. Mizuno, N. Saito, S. Wada, T. T. Tasuda, T. Takahashi, T. Kawahara, H. Fujiwara, and Y. Ogawa
Organizer
International GEMSIS and ASINACTR-G2602 Workshop
Place of Presentation
Nagoya University
Year and Date
2016-03-22 – 2016-03-25
Related Report
Int'l Joint Research
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[Presentation] Study of the Upper Mesosphere and the Lower Thermosphere by Using the Sodium LIDAR at the EISCAT Tromsoe Site, Norway2015
Author(s)
Nozawa, S., T. TSUDA, H. FUJIWARA, Y. OGAWA, T. KAWAHARA, N. SAITO, S. WADA, M. TSUTSUMI, S. SUZUKI, T. KAWABATA, T. TAKAHASHI, T. HIBINO, S. TAKITA, S. ASATO, C. HALL, A. BREKKE
Organizer
AOGS2015
Place of Presentation
Singapore
Year and Date
2015-08-02 – 2015-08-07
Related Report
Int'l Joint Research
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[Presentation] トロムソにおける大気上下結合の研究2015
Author(s)
野澤悟徳, 堤雅基, 小川泰信, 藤原均, 津田卓雄, 川原琢也, 斎藤徳人, 和田智之, 川端哲也, 高橋透、日比野辰哉、Chris Hall、Asgeir Brekke
Organizer
Japan Geoscience Union Meeting 2015
Place of Presentation
幕張メッセ、千葉
Year and Date
2015-05-24 – 2015-05-28
Related Report
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[Presentation] Study of the upper mesosphere and the lower thermosphere by using the sodium LIDAR at Tromsoe2015
Author(s)
Nozawa, S., T. T. Tsuda, H. Fujiwara, Y. Ogawa, T. D. Kawahara, N. Saito, S. Wada, M. Tsutsumi, S. Suzuki, T. Kawabata, T. Takahashi, T. Hibino, S. Takita, S. Asato, C. Hall, and A. Brekke
Organizer
Japan Geoscience Union Meeting 2015
Place of Presentation
Makuhari, Chiba
Year and Date
2015-05-24 – 2015-05-28
Related Report
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[Presentation] VARIATONS OF TEMPERATURE AND WINDS IN THE MESOSPHERE AND LOWER THERMOSPHERE ABOVE TROMSOE2015
Author(s)
S. Nozawa, T. Tsuda, T. Kawahara, N. Saito, S. Wada, H. Fujiwara, Y. Ogawa, T. Takahashi, S. Suzuki, T. Kawabata, C. Hall, A. Brekke, M. Tsutsumi, T. Hibino, S. Takita
Organizer
ISAR-4: Fourth International Symposium on the Arctic Research
Place of Presentation
Toyama International Center, Toyama
Year and Date
2015-04-17 – 2015-04-30
Related Report
Int'l Joint Research
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[Presentation] The EISCAT_3D project2014
Author(s)
Nozawa, S., H. Miyaoka, Y. Ogawa, S. Oyama, T. Nakamura, and R. Fujii
Organizer
Japan Geoscience Union Meeting 2014
Place of Presentation
Pacifico Yokohama
Year and Date
2014-04-28 – 2014-05-02
Related Report
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[Presentation] Variations of neutral temperature and winds in the polar mesosphere and lower thermosphere above Tromsø2013
Author(s)
Nozawa, S., T. D. Kawahara, T. Tsuda, N. Saito, M. Tsutsumi, S. Wada, H. Fujiwara, T. Takahashi, T. Kawabata, Y. Ogawa, S. Oyama, C. Hall, A. Brekke, and R. Fujii
Organizer
CAWSES-II symposium
Place of Presentation
名古屋大学
Year and Date
20131118-20131122
Related Report
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[Presentation] Changes of the polar lower thermosphere, mesosphere, and ionosphere due to a SSW event ~ A case study of the January 2012 event~2013
Author(s)
Nozawa, S., T. D. Kawahara, T.T. Tsuda, T. Kawabata, N. Saito, S. Wada, Y. Ogawa, and M. Tsutsumi
Organizer
ISSI meeting ID217
Place of Presentation
ISSI, Bern, Switzerland
Year and Date
20131014-20131018
Related Report
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[Presentation] Relationship between auroral substorm and ion upflow in the nightside polar ionosphere2013
Author(s)
Ogawa, Y., M. Sawatsubashi, S. C. Buchert, K. Hosokawa, S. Taguchi, S. Nozawa, S. Oyama, T. T. Tsuda, and R. Fujii
Organizer
The 16th EISCAT Symposium
Place of Presentation
Lancaster University, UK
Year and Date
20130812-20130816
Related Report
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[Presentation] トロムソナトリウムライダーの2012 年度観測概要2013
Author(s)
野澤悟徳, 川原琢也, 斎藤徳人, 津田卓雄, 川端哲也, 堤雅基, 大山伸一郎, 高橋透, 藤原均, 和田智之, 小川泰信, 藤井良一
Organizer
日本地球惑星科学連合2013大会
Place of Presentation
千葉幕張メッセ国際会議場
Year and Date
20130519-20130524
Related Report
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