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川原琢也  カワハラ タクヤ

教員組織学術研究院(工学系)電話番号
教育組織工学部 工学基礎部門FAX番号
職名准教授メールアドレス
住所〒380-8553 ホームページURL

更新日:2019/09/02

プロフィール

兼担研究科・学部
大学院工学系研究科
大学院総合工学系研究科
研究分野
超高層大気(レーザーレーダー観測)
惑星大気計測
現在の研究課題
光学的手法を用いた観測器の開発と観測

中間圏界面(高度約100km)付近の温度観測のためのナトリウムライダーの開発と極域での観測、データ解析

南極域中間圏界面温度の大気潮汐波、重力波による影響の解析

オーロラによる温度の擾乱解析

飛翔体搭載型水素/重水素吸収セルフォトメータの開発

所属学会
所属学会
レーザー学会
日本応用物理学会
地球電磁気・地球惑星圏学会
米国地球物理学会
米国光学学会
学歴
出身大学院
1995 , 東北大学 , 理学研究科 , 地球物理学

出身学校・専攻等(大学院を除く)
1989 , 東北大学 , 工学部 , 原子核工学

取得学位
博士 , 東北大学(日本)
研究職歴等
研究職歴
2007- , 信州大学工学部 准教授
2006- , 信州大学工学部 助教授
1995- , 信州大学工学部 助手

留学歴
2004-2005 , コロラド州立大学

研究活動業績

研究業績(著書・
発表論文等)
論文
Observation of Synchronization Between Instabilities of the Sporadic E Layer and Geomagnetic Field Line Connected F Region Medium-Scale Travelling Ionospheric Disturbances
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(6):4627-4638 2019(Jun.)
Author:Ejiri, Mitsumu K.; Nakarnura, Takuji; Tsuda, Takuo T.; Nishiyarna, Takanori; Abo, Makoto; She, Chiao-Yao; Nishioka, Michi; Saito, Akinori; Takahashi, Toru; Tsuno, Katsuhiko; Kawahara, Takuya D.; Ogawa, Takayo; Wada, Satoshi;


On the Long Lasting "C-Type" Structures in the Sodium Lidargram: The Lifetime of Kelvin-Helmholtz Billows in the Mesosphere and Lower Thermosphere Region
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(4):3110-3124 2019(Apr.)
Author:Mondal, S.; Sarkhel, S.; Agarwal, Jay; Chakrabarty, D.; Sekar, R.; Yuan, Tao; Cai, Xuguang; Liu, Alan Z.; Nozawa, Satonori; Saito, Norihito; Kawahara, Takuya D.; Mlynczak, Martin G.; Russell, James M., III;


Vertical fine structure and time evolution of plasma irregularities in the E-s layer observed by a high-resolution Ca+ lidar
EARTH PLANETS AND SPACE,71:- 2019
Author:Ejiri, Mitsumu K.; Nakamura, Takuji; Tsuda, Takuo T.; Nishiyama, Takanori; Abo, Makoto; Takahashi, Toru; Tsuno, Katsuhiko; Kawahara, Takuya D.; Ogawa, Takayo; Wada, Satoshi;


Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70km altitude over Syowa (69 degrees S, 40 degrees E), the Antarctic
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(15):7869-7880 2017
Author:Kogure, Masaru; Nakamura, Takuji; Ejiri, Mitsumu K.; Nishiyama, Takanori; Tomikawa, Yoshihiro; Tsutsumi, Masaki; Suzuki, Hidehiko; Tsuda, Takuo T.; Kawahara, Takuya D.; Abo, Makoto;


Depletion of mesospheric sodium during extended period of pulsating aurora
Journal of Geophysical Research,122(1):1212-1220 2017
Author:Takahashi, T.; Hosokawa, K.; Nozawa, S.; Tsuda, T. T.; Ogawa, Y.; Tsutsumi, M.; Hiraki, Y.; Fujiwara, H.; Kawahara, T. D.; Saito, N.; Wada, S.; Kawabata, T.; Hall, C.


Sodium temperature/wind lidar based on laser-diode-pumped Nd:YAG lasers deployed at Tromsø, Norway (696°N, 192°E)
Optics Express,25(12) 2017
Author:Kawahara, T. D.; Nozawa, S.; Saito, N.; Kawabata, T.; Tsuda, T. T.; Wada, S.


A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0°S, 39.6°E) in Antarctica
,42(10):3647-3653 2015
Author:Tsuda, T. T.; Chu, X.; Nakamura, T.; Ejiri, M. K.; Kawahara, T. D.; Yukimatu, A. S.; Hosokawa, K.


A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway
Geophysical Research Letters,42(21):9190-9196 2015
Author:Tsuda, T. T.; Nozawa, S.; Kawahara, T. D.; Kawabata, T.; Saito, N.; Wada, S.; Hall, C. M.; Tsutsumi, M.; Ogawa, Y.; Oyama, S.; Takahashi, T.; Ejiri, M. K.; Nishiyama, T.; Nakamura, T.; Brekke, A.


Variations of the neutral temperature and sodium density between 80 and 107 km above Tromsø during thewinter of 2010-2011 by a new solid-state sodium lidar.
J. Geophys. Res.,119(1):441-451 2014
Author: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, R. Fujii


A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data.
Annales Geophysicae,32(10):1195-1205 2014
Author: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. A. Brekke, C. Meek, R. Fujii


704 北極圏観測用高出力ナトリウムライダーを用いた3次元観測(計測・制御I,学術講演)
山梨講演会講演論文集,2013:190-191 2013(Oct. 26)
Author:村仲 渉; 川原 琢也; 深澤 光; 野澤 悟徳;
Keywords:lidar; three dimensional observation; Tromso; EISCAT radar; sodium;


705 南極レイリーラマンライダー用エタロンシステムの開発 : 気圧による光学的距離の調整(計測・制御I,学術講演)
山梨講演会講演論文集,2013:192-193 2013(Oct. 26)
Author:山本 晃寛; 川原 琢也; 鈴木 秀彦; 阿保 真; 江尻 省; 中村 卓司;
Keywords:Rayleigh Raman LIADR; Etalon; PMC; air pressure;


706 レーザーを用いた毒ガス検知手法のための信号処理法の検討(計測・制御I,学術講演)
山梨講演会講演論文集,2013:194-195 2013(Oct. 26)
Author:稲垣 昌樹; 冨田 孝幸; 川原 琢也; 和田 智之;
Keywords:Laser; chemical agent; Infrared;


Simultaneous PMC and PMSE observations with a ground-based lidar and SuperDARN HF radar at Syowa Station, Antarctica
Annales Geophysicae,31:1793-1803 2013(Oct. 01)
Author:Suzuki, H.; Nakamura, T.; Ejiri, M. K.; Ogawa, T.; Tsutsumi, M.; Abo, M.; Kawahara, T. D.; Tomikawa, Y.; Yukimatu, A. S.; Sato, N.


Decrease in sodium density observed during auroral particle precipitation over Tromsø, Norway
Geophysical Research Letters,40:4486-4490 2013(Sep. 01)
Author:Tsuda, T. T.; Nozawa, S.; Kawahara, T. D.; Kawabata, T.; Saito, N.; Wada, S.; Ogawa, Y.; Oyama, S.; Hall, C. M.; Tsutsumi, M.; Ejiri, M. K.; Suzuki, S.; Takahashi, T.; Nakamura, T.


Seasonal variations of midlatitude mesospheric Na layer and their tidal period perturbations based on full diurnal cycle Na lidar observations of 2002-2008
Journal of Geophysical Research: Atmospheres,117(D11):CiteID D11304 2012(Jun. 01)
Author:Yuan, Tao, C.-Y. She, Takuya D. Kawahara, D. A. Krueger


Sodium temperature lidar based on injection seeded Nd:YAG pulse lasers using a sum-frequency generation technique
OPTICS EXPRESS,19(4):3553-3561 2011
Author:Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Saito, Yasunori; Nomura, Akio


狭線幅高出力パルスナトリウムD_2線共鳴コヒーレント光源
電気学会研究会資料. OQD, 光・量子デバイス研究会,2010(1):19-23 2010(Feb. 15)
Author:斎藤 徳人; 月花 智博; 川原 琢也; 野澤 悟徳; 小泉 俊郎; 和田 智之;
Keywords:ナトリウム原子; 単一周波数; Nd:YAGレーザー; 和周波発生; ドップラーフリー飽和吸収分光; ナトリウムライダー;


Three dimensional monitoring of stack plume dynamics by a scanning Mie lidar system as a plume watchdog station
OPTICAL REVIEW,12(4):328-333 2005
Author:Saito, Y; Kurata, H; Hara, Y; Kobayashi, F; Kawahara, T; Nomura, A


Laser-induced fluorescence imaging of plants using a liquid crystal tunable filter and charge coupled device imaging camera
Review of Scientific Instruments,76:106103 2005
Author:Saito, Y. Matsubara, T. Koga, T. Kobayashi, F. Kawahara, T.D. Nomura, A.


Experimental discussion on eye-safe 1.54 mu m photon counting lidar using avalanche photodiode
OPTICAL REVIEW,11(6):378-384 2004
Author:Saito, Y; Kurata, H; Kurushima, H; Kobayashi, F; Kawahara, TD; Nomura, A; Maruyama, T; Tanaka, M


Observed temperature structure of the atmosphere above Syowa Station, Antarctica (69 degrees S, 39 degrees E)
Journal of Geophysical Research- Atmosphere,109(D12) 2004
Author:T.D.Kawahara, C.S.Gardner, A.Nomura


A dynamical study of the winter mid-latitude mesopause region (80-105km) based on initial simultaneous lidar measurements of temperature and winds over Fort Collins, CO (41N, 105W),
Adv. Space Phys., 32, 753-758, 2003. 2003
Author:James Sherman, Bifford P. Williams, T. Kawahara, D. A. Krueger, C. Y. She


A comparison of hydroxyl rotational temperatures from Davis (69 degrees S, 78 degrees E) with sodium lidar temperatures from Syowa (69 degrees S, 39 degrees E)
GEOPHYSICAL RESEARCH LETTERS,30(1):- 2003
Author:G.B.Burns, T.D.Kawahara, W.J.R.French, A.Nomura, A.R.Klekociuk,


The first 80-hour continuous lidar campaign for simultaneous observation of mesopause region temperature and wind,
Geophys. Res. Lett. 30, 10.1029/2002GL016412,2003 2003
Author:She, C. Y., Jim Sherman, Tao Yuan, B. P. Williams, Kam Arnold, T. D.Kawahara, Tao Li, LiFang Xu, J. D. Vance, P. Acott and David A. Krueger


Laser-induced fluorescence detection of plant and optimal harvest time of agricultural products (lettuce)
APPLIED ENGINEERING IN AGRICULTURE,18(3):361-366 2002
Author:Takeuchi, A; Saito, Y; Kanoh, M; Kawahara, TD; Nomura, A; Ishizawa, H; Matsuzawa, T; Komatsu, K


Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69 degrees S, 39 degrees E), Antarctica
GEOPHYSICAL RESEARCH LETTERS,29(15) 2002
Author:Kawahara, TD; Kitahara, T; Kobayashi, F; Saito, Y; Nomura, A; She, CY; Krueger, DA; Tsutsumi, M


Remote estimation of the chlorophyll concentration of living trees using laser-induced fluorescence imaging lidar
OPTICAL REVIEW,9(2):37-39 2002
Author:Saito, Y; Kurihara, K; Takahashi, H; Kobayashi, F; Kawahara, T; Nomura, A; Takeda, S


Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69S, 39E), Antarctica
Geophysical Research Letters,29(15):CiteID 1709, DOI 10.1029/2002GL015244 2002
Author:T.D.Kawahara, T.Kitahara, F.Kobayashi, Y.Saito, A.Nomura, M.Tsutsumi, C.-Y.She and David.A.Krueger


First mesopause temperature measurements by a sodium lidar in the Antarctic region
Advances in Polar Upper Atmosphere Research,15:23 2001
Author:Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Tsutsumi, Masaki; Saito, Yasunori; Nomura, Akio


Development and performance characteristics of laser-induced fluorescence imaging lidar for forestry applications
FOREST ECOLOGY AND MANAGEMENT,128(1-2):129-137 2000
Author:Saito, Y; Saito, R; Kawahara, TD; Nomura, A; Takeda, S


Coordinated observations of the mesopause region with radar and optical techniques
ADVANCES IN REMOTE SENSING OFTHE ATMOSPHERE FROM SPACE AND FROM THE GROUND,26(6):907-916 2000
Author:Tsuda, T; Nakamura, T; Nomura, A; Kawahara, TD; Nagasawa, C; Abo, M; Okano, S; Taguchi, M; Ejiri, M


Ultraviolet imaging spectrometer (UVS) experiment on board the NOZOMI spacecraft: Instrumentation and initial results, 共著, M.Taguchi 他4名,
Earth Planets Space,52:49-60 2000
Author:Taguchi, M.; Fukunishi, H.; Watanabe, S.; Okano, S.; Takahashi, Y.; Kawahara, T. D.


Performance check of vegetation fluorescence imaging lidar through in vivo and remote estimation of chlorophyll concentration inside plant leaves
OPTICAL REVIEW,6(2):155-159 1999
Author:Saito, Y; Saito, R; Nomura, E; Kawahara, TD; Nomura, A; Takaragaki, S; Ida, K; Takeda, S


Characteristics of InAlGaAs/InAlAs superlattice avalanche photodiodes for ultra-low optical power detection in the near infrared
OPTICAL REVIEW,6(5):459-463 1999
Author:Saito, Y; Maruyama, T; Yamaki, H; Kobayashi, F; Kawahara, TD; Nomura, A; Tanaka, L


Simultaneous measurements of dynamical structure in the mesopause region with lidars and MU radar
EARTH PLANETS AND SPACE,51(7-8):731-739 1999
Author:K.Kobayashi, T.Kitahara, T.D.Kawahara, Y.Saito, A.Nomura, T.Nakamura, T.Tsuda, M.Abo, C.Nagasawa,


Observations of mesospheric sporadic sodium layers with the MU radar and sodium lidars
EARTH PLANETS AND SPACE,51(7-8):785-797 1999
Author:Miyagawa, Hirohisa; Nakamura, Takuji; Tsuda, Toshitaka; Abo, Makoto; Nagasawa, Chikao; Kawahara, Takuya D.; Kobayashi, Keiji; Kitahara, Tsukasa; Nomura, Akio


Sodium temperature lidar system for measuring mesopause region at Syowa station, Antarctica
Proceedings of International Laser Sensing Symposium (Fukui, Japan),:85-86 1999
Author:T. Kitahara, TD Kawahara, F. Kobayashi, Y. Saito, A. Nomura


Investigation of laser-induced fluorescence of several natural leaves for application to lidar vegetation monitoring
APPLIED OPTICS,37(3):431-437 1998
Author:Saito, Y; Kanoh, M; Hatake, K; Kawahara, TD; Nomura, A


Sodium lidar system for observing Antarctic mesopause temperature over Syowa station
Proc. of the NIPR symposium,12:121-130 1998
Author:Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Saito, Yasunori; Nomura, Akio


Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere
APPLIED OPTICS,36(10):2229-2237 1997
Author:Kawahara, TD; Okano, S; Abe, T; Fukunishi, H; Ito, K


Studies of the MLT region using the MU radar and simultaneous observations with OH spectrometer and other optical instruments
Earth, Planets and Space,19(4):643-652 1997
Author:Nakamura, T; Tsuda, T; Fukao, S; Takahashi, H; Batista, PP; Buriti, RA; Tsutsumi, M; Ishii, M; Igarashi, K; Fukunishi, H; Yamada, Y; Nomura, A; Kawahara, TD; Kobayashi, K; Nagasawa, C; Abo, M; Taylor, MJ


Range-resolved image detection of laser-induced fluorescence of natural trees for vegetation distribution monitoring
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES&REVIEW PAPERS,36(11):7024-7027 1997
Author:Saito, Y; Hatake, K; Nomura, E; Kawahara, TD; Nomura, A; Sugimoto, N; Itabe, T


Range-resolved bistatic imaging lidar for the measurement of the lower atmosphere
OPTICS LETTERS,21(17):1318-1320 1996
Author:Meki, K; Yamaguchi, K; Li, X; Saito, Y; Kawahara, TD; Nomura, A


学会発表
Mesospheric potassium layer observation by a frequency-tunable resonance scattering lidar system.
40th COSPAR Scientific Assembly 2014(Aug. 02)
Author:Ejiri, Mitsumu K., Takuji Nakamura, Takuya D. Kawahara, Makoto Abo, Takanori Nishiyama, Takuo T. Tsuda


Vertical profiles of atmospheric temperature between upper troposphere and mesosphere obtained from Rayleigh/Raman lidar installed at Syowa station in Antarctica.
40th COSPAR Scientific Assembly 2014(Aug. 02)
Author:Nishiyama, Takanori, Takuji Nakamura, Masaki Tsutsumi, Takuya D. Kawahara, Yoshihiro Tomikawa, Hidehiko Suzuki, Mitsumu K. Ejiri,  Makoto Abo, Takuo T. Tsuda


Variations of the neutral temperature inside an SSL during a night of high auroral activity above Tromsø
American Geophysical Union, Fall Meeting 2013 2013(Dec. 10)
Author:Takahashi, T., Nozawa, S., Tsuda, T. T., Oyama, S., Fujiwara, H., Tsutsumi, M., Kawahara, T., Saito, N., Wada, S., Kawabata, T., Matuura, N., Hall, C. M.


All solid state, high power (4 W) sodium temperature/wind lidar deployed at EISCATradar site, Norway (69.6ºN, 19.2ºE)
International CAWSES-II Symposium 2013(Nov. 23)
Author:Kawahara, T., S. Nozawa, N. Saito, T. Tsuda, S. Wada, T. Kawabata


A new tunable resonance scattering lidar for upper atmospheric measurements at Syowa Station: Preliminary observations in Japan
International CAWSES-II Symposium 2013(Nov. 18)
Author:Ejiri, M. K., T. T. Tsuda, T. Nishiyama, M. Abo, T. D. Kawahara, T. Nakamura


Variations of neutral temperature and winds in the polar mesosphere and lower thermosphere above Tromsø
International CAWSES-II Symposium, Nagoya University 2013(Nov. 18)
Author: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


Thermospheric sodium layer observed at Syowa Station, Antarctica
International CAWSES-II Symposium 2013(Nov. 18)
Author:Tsuda, T. T., X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara

研究費
科学研究費補助金(研究代表者)
2012 - 2014 , ナトリウムライダーの新規観測モード:3次元観測への拡張 , 基盤研究(B)
2008 - 2011 , ナトリウム温度ライダーに応用するレーザ周波数の超精密制御方法の研究 , 基盤研究(B)
2007 - 2009 , 極域温度モニター用高出力ナトリウム・レーリー温度ライダーの基礎研究 , 萌芽研究
2005 - 2007 , 昼間観測のためのナトリウム温度ライダー用超狭帯域光学フィルタの開発と特性測定 , 基盤研究(B)
2001 - 2001 , 南極域における下部熱圏中間圏の温度構造/エネルギー結合過程に関する研究 , 奨励研究(A)
1997 - 1998 , 昼間観測のための中間圏ナトリウムライダー用ファラデーフィルターの開発 , 奨励研究(A)

科学研究費補助金(研究分担者)
2017 - , マルチビームライダーを中心に用いた精密拠点観測による北極域大気上下結合の解明 , 超高層物理学
2012 - 2016 , 新技術ライダー観測を活用した超高層大気下部の化学過程と物質輸送の研究 , 基盤研究(B)
2009 - 2011 , ライダーを活用した中層・超高層大気結合の協同観測-乱流圏界面の解明に向けて- , 基盤研究(B)
2008 - 2010 , 超高層大気下部の経度非一様性の国際協同観測 , 基盤研究(B)
2006 - 2009 , EISCATレーダーを主に用いた磁気圏・電離圏・熱圏・中間圏結合の総合的研究 , 基盤研究(B)
2006 - 2008 , 新観測技術を用いた熱圏下部大気の3次元空間構造の研究 , 基盤研究(B)
2005 - 2008 , レーザー誘起蛍光を指標とする植物健康診断・計測法の開発 , 基盤研究(B)
2000 - 2001 , レーザ分光技術を活用した建築構造物変質過程の遠隔モニタリング手法 , 萌芽研究
1997 - 1998 , 高速波長スキャン可能な高分解能レーザ光源の開発 , 基盤研究(C)
1996 - 1998 , 流星物質が中間圏大気に及ぼす影響のレーダー/ライダー同時観測による研究 , 基盤研究(B)
1996 - 1997 , 超格子APDによる近赤外波長域フォトンカウンティング , 基盤研究(C)
1996 - 1997 , 局地気象観測用バイスタティック・イメージング・ライダー試作 , 基盤研究(A)

教育活動実績

授業等
2018 , 前期 , 波動と光
2018 , 前期 , 電磁気学
2018 , 後期 , 物理工学特論I
2018 , 通年 , 物理学実験A, B, C