Updated on 2021/10/18

写真a

 
NAGAHAMA Tomoo
 
Organization
Institute for Space-Earth Environmental Research Meteorological and Atmospheric Research Division Associate professor
Graduate School
Graduate School of Science
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. 博士(理学) ( 1997.5   名古屋大学 ) 

Research Areas 2

  1. Others / Others  / Upper Atmospheric Physics

  2. Others / Others  / Weather/Oceanic Physics/Hydrology

Current Research Project and SDGs 1

  1. 地球内外の環境変動に伴う中層大気の組成変動機構の解明

Education 2

  1. Nagoya University   Graduate School, Division of Natural Science   Division of Astronomical Science

    1990.4 - 1996.3

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    Country: Japan

  2. Nagoya University   Faculty of Science   Department of Physics

    1986.4 - 1990.3

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    Country: Japan

Professional Memberships 5

  1. 地球電磁気・地球惑星圏学会

  2. 日本大気化学会

  3. 日本気象学会

  4. American Geophysical Union

  5. 日本天文学会

 

Papers 38

  1. Validation of methane and carbon monoxide from Sentinel-5 Precursor using TCCON and NDACC-IRWG stations Reviewed International coauthorship International journal

    Sha Mahesh Kumar, Langerock Bavo, Blavier Jean-Francois L., Blumenstock Thomas, Borsdorff Tobias, Buschmann Matthias, Dehn Angelika, De Maziere Martine, Deutscher Nicholas M., Feist Dietrich G., Garcia Omaira E., Griffith David W. T., Grutter Michel, Hannigan James W., Hase Frank, Heikkinen Pauli, Hermans Christian, Iraci Laura T., Jeseck Pascal, Jones Nicholas, Kivi Rigel, Kumps Nicolas, Landgraf Jochen, Lorente Alba, Mahieu Emmanuel, Makarova Maria V., Mellqvist Johan, Metzger Jean-Marc, Morino Isamu, Nagahama Tomoo, Notholt Justus, Ohyama Hirofumi, Ortega Ivan, Palm Mathias, Petri Christof, Pollard David F., Rettinger Markus, Robinson John, Roche Sebastien, Roehl Coleen M., Roehling Amelie N., Rousogenous Constantina, Schneider Matthias, Shiomi Kei, Smale Dan, Stremme Wolfgang, Strong Kimberly, Sussmann Ralf, Te Yao, Uchino Osamu, Velazco Voltaire A., Vigouroux Corinne, Vrekoussis Mihalis, Wang Pucai, Warneke Thorsten, Wizenberg Tyler, Wunch Debra, Yamanouchi Shoma, Yang Yang, Zhou Minqiang

    ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 14 ( 9 ) page: 6249 - 6304   2021.9

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

    DOI: 10.5194/amt-14-6249-2021

    Web of Science

  2. First ground-based Fourier transform infrared (FTIR) spectrometer observations of HFC-23 at Rikubetsu, Japan, and Syowa Station, Antarctica Reviewed International coauthorship International journal

    Takeda Masanori, Nakajima Hideaki, Murata Isao, Nagahama Tomoo, Morino Isamu, Toon Geoffrey C., Weiss Ray F., Muhle Jens, Krummel Paul B., Fraser Paul J., Wang Hsiang-Jui

    ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 14 ( 9 ) page: 5955 - 5976   2021.9

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

    DOI: 10.5194/amt-14-5955-2021

    Web of Science

  3. Characterization and potential for reducing optical resonances in Fourier transform infrared spectrometers of the Network for the Detection of Atmospheric Composition Change (NDACC) Reviewed International coauthorship International journal

    Blumenstock Thomas, Hase Frank, Keens Axel, Czurlok Denis, Colebatch Orfeo, Garcia Omaira, Griffith David W. T., Grutter Michel, Hannigan James W., Heikkinen Pauli, Jeseck Pascal, Jones Nicholas, Kivi Rigel, Lutsch Erik, Makarova Maria, Imhasin Hamud K., Mellqvist Johan, Morino Isamu, Nagahama Tomoo, Notholt Justus, Ortega Ivan, Palm Mathias, Raffalski Uwe, Rettinger Markus, Robinson John, Schneider Matthias, Servais Christian, Smale Dan, Stremme Wolfgang, Strong Kimberly, Sussmann Ralf, Te Yao, Velazco Voltaire A.

    ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 14 ( 2 ) page: 1239 - 1252   2021.2

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

    DOI: 10.5194/amt-14-1239-2021

    Web of Science

  4. Detection and attribution of wildfire pollution in the Arctic and northern midlatitudes using a network of Fourier-transform infrared spectrometers and GEOS-Chem Reviewed International coauthorship International journal

    Lutsch Erik, Strong Kimberly, Jones Dylan B. A., Blumenstock Thomas, Conway Stephanie, Fisher Jenny A., Hannigan James W., Hase Frank, Kasai Yasuko, Mahieu Emmanuel, Makarova Maria, Morino Isamu, Nagahama Tomoo, Notholt Justus, Ortega Ivan, Palm Mathias, Poberovskii Anatoly V, Sussmann Ralf, Warneke Thorsten

    ATMOSPHERIC CHEMISTRY AND PHYSICS   Vol. 20 ( 21 ) page: 12813 - 12851   2020.11

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

    DOI: 10.5194/acp-20-12813-2020

    Web of Science

  5. TROPOMI-Sentinel-5 Precursor formaldehyde validation using an extensive network of ground-based Fourier-transform infrared stations Reviewed International coauthorship International journal

    Vigouroux Corinne, Langerock Bavo, Bauer Aquino Carlos Augusto, Blumenstock Thomas, Cheng Zhibin, De Maziere Martine, De Smedt Isabelle, Grutter Michel, Hannigan James W., Jones Nicholas, Kivi Rigel, Loyola Diego, Lutsch Erik, Mahieu Emmanuel, Makarova Maria, Metzger Jean-Marc, Morino Isamu, Murata Isao, Nagahama Tomoo, Notholt Justus, Ortega Ivan, Palm Mathias, Pinardi Gaia, Roehling Amelie, Smale Dan, Stremme Wolfgang, Strong Kim, Sussmann Ralf, Te Yao, van Roozendael Michel, Wang Pucai, Winkler Holger

    ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 13 ( 7 ) page: 3751 - 3767   2020.7

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

    DOI: 10.5194/amt-13-3751-2020

    Web of Science

  6. Fourier transform infrared time series of tropospheric HCN in eastern China: seasonality, interannual variability, and source attribution Reviewed International coauthorship International journal

    Sun Youwen, Liu Cheng, Zhang Lin, Palm Mathias, Notholt Justus, Hao Yin, Vigouroux Corinne, Lutsch Erik, Wang Wei, Shan Changong, Blumenstock Thomas, Nagahama Tomoo, Morino Isamu, Mahieu Emmanuel, Strong Kimberly, Langerock Bavo, De Maziere Martine, Hu Qihou, Zhang Huifang, Petri Christof, Liu Jianguo

    ATMOSPHERIC CHEMISTRY AND PHYSICS   Vol. 20 ( 9 ) page: 5437 - 5456   2020.5

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

    DOI: 10.5194/acp-20-5437-2020

    Web of Science

  7. Ground-based FTIR observation of hydrogen chloride (HCl) over Hefei, China, and comparisons with GEOS-Chem model data and other ground-based FTIR stations data Reviewed International coauthorship International journal

    Yin Hao, Sun Youwen, Liu Cheng, Lu Xiao, Smale Dan, Blumenstock Thomas, Nagahama Tomoo, Wang Wei, Tian Yuan, Hu Qihou, Shan Changgong, Zhang Huifang, Liu Jianguo

    OPTICS EXPRESS   Vol. 28 ( 6 ) page: 8041 - 8055   2020.3

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

    DOI: 10.1364/OE.384377

    Web of Science

  8. Interannual Variation of Upper Stratospheric Ozone in the Northern Midlatitudes in Early Winter Caused by Planetary Waves Reviewed International journal

    Ohyama H., Sugita T., Akiyoshi H., Nagahama T., Mizuno A.

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 124 ( 24 ) page: 14347 - 14361   2019.12

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

    DOI: 10.1029/2019JD030824

    Web of Science

  9. CONCEPTUAL STUDY OF SUPERCONDUCTING SUBMILLIMETER-WAVE LIMB-EMISSION SOUNDER-2 (SMILES-2) RECEIVER

    Ochiai S., Baron P., Irimajiri Y., Nishibori T., Hasegawa Y., Uzawa Y., Maezawa H., Manabe T., Mizuno A., Nagahama T., Kimura K., Suzuki M., Saito A., Shiotani M.

    2019 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2019)     page: 8792-8795   2019

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    Web of Science

  10. SMILES-2 Mission for Temperature, Wind, and Composition in the Whole Atmosphere Reviewed

    Satoshi Ochiai, Philippe Baron, Toshiyuki Nishibori, Yoshihisa Irimajiri, Yoshinori Uzawa, Takeshi Manabe, Hiroyuki Maezawa, Akira Mizuno, Tomoo Nagahama, Hideo Sagawa, Makoto Suzuki, Masato Shiotani

    SOLA   Vol. 13A   page: 13-18   2017.9

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

    DOI: doi:10.2151/sola.13A-003

  11. Observations of stratospheric and mesospheric O3 with a millimeter-wave radiometer at Rikubetsu, Japan Reviewed

    Ohyama H., T. Nagahama, A. Mizuno, H. Nakane, H. Ogawa

    Earth, Planets and Space     2016.2

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    DOI: 10.1186/s40623-016-0406-4

  12. Ground-based observations of nitric oxide in the mesosphere and lower thermosphere over Antarctica in 2012-2013 Reviewed

    Y. Isono, A. Mizuno, T. Nagahama, Y. Miyoshi, T. Nakamura, R. Kataoka, M. Tsutsumi, M. K. Ejiri, H. Fujiwara, H. Maezawa, M. Uemura

    Journal of Geophysical Research: Space Physics     2014.8

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    DOI: doi:10.1002/2014JA019881

  13. Variations of nitric oxide in the mesosphere and lower thermosphere over Antarctica associated with a magnetic storm in April 2012 Reviewed

    Isono Y., A. Mizuno, T. Nagahama, Y. Miyoshi, T. Nakamura, R. Kataoka, M. Tsutsumi, M. K. Ejiri, H. Fujiwara, H. Maezawa

    Geophys. Res. Lett.     2014.4

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    DOI: doi:10.1002/2014GL059360

  14. Ground-based millimeter-wave observation of stratospheric ClO over Atacama, Chile in the mid-latitude Southern Hemisphere Reviewed

    T. Kuwahara, T. Nagahama, H. Maezawa, Y. Kojima, H. Yamamoto, T. Okuda, N. Mizuno, H. Nakane, Y. Fukui, and A. Mizuno

    Atmospheric Measurement Techniques   Vol. 5   page: 2601-2611   2012.11

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    We have performed ground-based measurements of stratospheric chlorine monoxide (ClO) during the summer in 2009 over the Atacama highland, Chile, a new observing site in the mid-latitude region in the Southern Hemisphere, by using a millimeter-wave spectroscopic radiometer. The radiometer, equipped with a superconducting receiver and a digital Fourier spectrometer, was developed by Nagoya University. To reveal the diurnal variation of ClO, we retrieved the vertical mixing ratio profiles by the weighted-damped least-squares algorithm applied for the spectral data at 203 GHz obtained between 5 and 16 December 2009. The total error on the retrieval is estimated to be 20% to 30% in an altitude range from 40 km to 50 km. The amplitude of the diurnal variation is estimated as 33% of the daytime average at 40 km. The observed time variation shows a pattern similar to that of the previous works observed in the northern mid-latitude region.

    DOI: doi:10.5194/amt-5-2601-2012

  15. Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri Reviewed

    T. Tanaka, Y. Miyamoto, I. Morino, T. Machida, T. Nagahama, Y. Sawa, H. Matsueda, D. Wunch, S. Kawakami, and O. Uchino

    Atmospheric Measurement Techniques   Vol. 5 ( 8 ) page: 2003-2012   2012.8

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    Aircraft measurements of carbon dioxide and methane over Tsukuba (36.05° N, 140.12° E) (February 2010) and Moshiri (44.36° N, 142.26° E) (August 2009) were made to calibrate ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) and to compare with the Greenhouse gases Observing SATellite (GOSAT). By comparing the g-b FTS measurements with the airborne measurements, the column-averaged dry air mole fractions of CO2 (XCO2) and CH4 (XCH4) retrieved from the g-b FTS measurements at Tsukuba were biased low by 0.33 ± 0.11% for XCO2 and 0.69 ± 0.29% for XCH4. The g-b FTS values at Moshiri were biased low by 1.24% for XCO2 and 2.11% for XCH4. The GOSAT data show biases that are 3.1% ± 1.7% lower for XCO2 and 2.5% ± 0.8% lower for XCH4 than the aircraft measurements obtained over Tsukuba.

    DOI: doi:10.5194/amt-5-2003-2012

  16. Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space: Validation of PPDF-based CO2 retrievals from GOSAT Reviewed

    S. Oshchepkov, et al.

    Journal of Geophysical Research   Vol. 117   2012.6

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    This report describes a validation study of Greenhouse gases Observing Satellite (GOSAT) data processing using ground-based measurements of the Total Carbon Column Observing Network (TCCON) as reference data for column-averaged dry air mole fractions of atmospheric carbon dioxide (XCO2). Our results reveal effects of optical path lengthening over Northern Hemispheric stations, essentially from May-September of each year, and of optical path shortening for sun-glint observations in tropical regions. Removal of observations that were highly contaminated by aerosol and cloud from the GOSAT data set resulted in acceptable agreement in the seasonal variability of XCO2 over each station as compared with TCCON measurements.

    DOI: doi:10.1029/2012JD017505

  17. Overview and early results of the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) Reviewed

    Kikuchi, K., T. Nishibori, S. Ochiai, H. Ozeki, Y. Irimajiri, Y. Kasai, M. Koike, T. Manabe, K. Mizukoshi, Y. Murayama, T. Nagahama, T. Sano, R. Sato, M. Seta, C. Takahashi, M. Takayanagi, H. Masuko, J. Inatani, M. Suzuki, and M. Shiotani

    Journal of Geophysical Research-Atmospheres   Vol. 115 ( D23306 )   2010.12

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    The Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) was successfully launched and attached to the Japanese Experiment Module (JEM) on the International Space Station (ISS) on 25 September 2009. It has been making atmospheric observations since 12 October 2009 with the aid of a 4 K mechanical cooler and superconducting mixers for submillimeter limb-emission sounding in the frequency bands of 624.32-626.32 GHz and 649.12-650.32 GHz. On the basis of the observed spectra, the data processing has been retrieving vertical profiles for the atmospheric minor constituents in the middle atmosphere, such as O3 with isotopes, HCl, ClO, HO2, BrO, and HNO3. Results from SMILES have demonstrated its high potential to observe atmospheric minor constituents in the middle atmosphere. Unfortunately, SMILES observations have been suspended since 21 April 2010 owing to the failure of a critical component.

    DOI: doi:10.1029/2010JD014379

  18. Remotely operable compact instruments for measuring atmospheric CO2 and CH4 column densities at surface monitoring sites Reviewed

    Kobayashi, N., G. Inoue, M. Kawasaki, H. Yoshioka, M. Minomura, I. Murata, T. Nagahama, Y. Matsumi, T. Tanaka, I. Morino, and T. Ibuki

    Atmospheric Measurement Techniques   Vol. 3   page: 1-10   2010.4

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    Remotely operable compact instruments for measuring atmospheric CO2 and CH4 column densities were developed in two independent systems. One utilizing a grating based desktop optical spectrum analyzer (OSA) with a resolution enough to resolve rotational lines of CO2 and CH4 in the region of 1565-1585 and 1674-1682 nm, respectively. The other is an application of an optical fiber Fabry-Perot interferometer (FFPI) to obtain the CO2 column density. The CO2 and CH4 column densities deduced were in excellent agreement with those measured by a Fourier transform spectrometer with high resolution.

  19. Column-averaged volume mixing ratio of CO2 measured with ground-based Fourier transform spectrometer at Tsukuba Reviewed

    Hirofumi Ohyama, Isamu Morino, Tomoo Nagahama, Toshinobu Machida, Hiroshi Suto, Hiroyuki Oguma, Yousuke Sawa, Hidekazu Matsueda, Nobuo Sugimoto, Hideaki Nakane, and Kazumichi Nakagawa

    Journal of Geophysical Research -Atmospheres   Vol. 114   page: doi:10.1029/2008JD011465   2009.9

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    We retrieved CO2 volume mixing ratios (VMRs) from solar absorption spectra in the 1.6-μm CO2 (30012-00001) band measured with a ground-based high-resolution Fourier transform spectrometer (FTS) at Tsukuba, Japan, using profile retrieval and scaling retrieval algorithms. We derived the time series of the column-averaged CO2 VMRs (X CO2) from December 2001 to December 2007.

  20. Search of SO2 in the Martian atmosphere by ground-based submillimeter observation Reviewed

    Nakagawa, H., Y. Kasaba, H. Maezawa, A. Hashimoto, H. Sagawa, I. Murata, S. Okano, S. Aoki, N. Moribe, A. Mizuno, M. Momose, T. Ohnishi, N. Mizuno, and T. Nagahama

    Planet. Space Science   Vol. 57   page: 2123-2127   2009

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  21. Ground-based millimeter-wave observations of water vapor emission (183 GHz) at Atacama, Chile Reviewed

    Kuwahara, T., A. Mizuno, T. Nagahama, H. Maezawa, A. Morihira, N. Toriyama, S. Murayama, M. Matsuura, T. Sugimoto, S. Asayama, N. Mizuno, T. Onishi, and Y. Fukui

    Advances in Space Research   Vol. 42 ( 1 ) page: 1167-1171   2008.10

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    We report the first results of ground-based millimeter-wave measurements of 183 GHz atmospheric water vapor spectra from Atacama highland (4800 m alt.), Chile. The measurements were carried out in December 2005 by using a spectroscopic radiometer equipped with a superconductive heterodyne receiver.

    DOI: doi:10.1016/j.asr.2007.11.030

  22. Ground-Based Millimeter-Wave Radiometer for Measuring the Stratospheric Ozone over Rikubetsu, Japan Reviewed

    Tomoo NAGAHAMA, Hideaki NAKANE, Yasumi FUJINUMA, Atsushi MORIHIRA, Akira MIZUNO, Hideo OGAWA, and Yasuo FUKUI

    Journal of the Meteorological Society of Japan   Vol. 85 ( 4 ) page: 495-509   2007.8

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    DOI: doi:10.2151/jmsj.85.495

  23. Continuous Measurements of the Stratospheric and Mesospheric Ozone by Using Ground-based Millimeter-wave Radiometers Reviewed

    Tomoo Nagahama, Akira Mizuno, Hiroyuki Maezawa, Hideaki Nakane, Yasumi Fujinuma, Atsushi Morihira, Hideo Ogawa, and Yasuo Fukui

    Proceedings of International Conference on Submillimeter Science and Technology (ICSST04)     page: 20-23   2006

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  24. A semi-annual variation of ozone in the middle mesosphere observed with the millimeter-wave radiometer at Tsukuba, Japan Reviewed

    Nagahama, T., H. Nakane, Y. Fujinuma, H. Ogawa, A. Mizuno, and Y. Fukui

    Journal of Geophysical Research -Atmospheres   Vol. 108   page: 10.1029/2003JD003724   2003

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  25. Millimeter-wave radiometer for the measurement of stratospheric ClO using a superconductive (SIS) receiver installed in the southern hemisphere Reviewed

    Mizuno, A., T. Nagahama, A. Morihira, H. Ogawa, N. Mizuno, Y. Yonekura, H. Yamamoto, H. Nakane, and Y. Fukui

    International Journal of Infrared and Millimeter Waves   Vol. 23   page: 981-995   2002

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  26. Ground-based millimeter-wave observations of ozone in the upper stratosphere and mesosphere at Tsukuba and Nagoya Reviewed

    Nagahama, T., H. Nakane, M. Ninomiya, H. Ogawa, and Y. Fukui

    Advances in Space Research   Vol. 26   page: 1017-1020   2000

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  27. Ground-based millimeterwave instrument for measurement of stratospheric ClO using a superconductive (SIS) receiver Reviewed

    Fukui, Y., H. Ogawa, K. C. Xiao, Y. Iwasaka, H. Nakane, and T. Nagahama

    Advances in Space Research   Vol. 26   page: 975-978   2000

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  28. Ground-based millimeter-wave observations of ozone in the upper stratosphere and mesosphere over Tsukuba Reviewed

    Nagahama, T., H. Nakane, Y. Fujinuma, M. Ninomiya, H. Ogawa, and Y. Fukui

    Earth, Planets and Space   Vol. 51   page: 1287-1296   1999

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  29. A spatially complete 13CO J=1-0 survey of the Orion A cloud Reviewed

    Nagahama, T., A. Mizuno, H. Ogawa, and Y. Fukui

    Astronomical Journal   Vol. 116   page: 336-348   1998

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  30. Observations of C18O (J=1-0) emission spectrum in the dark cloud L1211 Reviewed

    Yu, Z. -Y., Y. Fukui, and T. Nagahama

    Chinese Astronomy and Astrophysics   Vol. 20   page: 38-44   1996

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  31. The new observation of C18O(J=1-0) molecular emission in the Cepheus OB3 molecular cloud Reviewed

    Yu, Z. -Y., T. Nagahama, and Y. Fukui

    Astrophysical Journal   Vol. 471   page: 867-870   1996

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  32. Observation of C18O (J=1-0) emission from Cepheus C Reviewed

    Yu, Z. -Y., T. Nagahama, and Y. Fukui

    Chinese Astronomy and Astrophysics   Vol. 20   page: 355-357   1996

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  33. Clumping in the giant molecular cloud complex Cepheus OB3 Reviewed

    Yu, Z. -Y., T. Nagahama, and Y. Fukui

    Chinese Astronomy and Astrophysics   Vol. 20   page: 131-131   1996

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  34. Overall distribution of dense molecular gas and star formation in the Taurus cloud complex Reviewed

    Mizuno, A., T. Onishi, Y. Yonekura, T. Nagahama, H. Ogawa, and Y. Fukui

    Astrophysical Journal   Vol. 445   page: L161-L165   1995

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  35. Unbiased surveys for dense cloud cores Reviewed

    Fukui, Y., A. Mizuno, H. Ogawa, K. Dobashi, T. Nagahama, J. P. Bernard, T. Tsuboi, T. Onishi, and Y. Yonekura

    Proceedings of Cold Universe     page: 157-168   1994

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  36. A new look at the dark cloud L1251: Sensitive observations of the molecular emission Reviewed

    Sato, F., A. Mizuno, T. Nagahama, T. Onishi, Y. Yonekura, and Y. Fukui

    Astrophysical Journal   Vol. 435   page: 279-289   1994

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  37. Four CO outflows and dense gas in the dark cloud complex near IC5146 Reviewed

    Dobashi, K., T. Onishi, T. Iwata, T. Nagahama, N. Patel, R. L. Snell, and Y. Fukui

    Astronomical Journal   Vol. 105   page: 1487-1494   1993

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  38. A systematic survey for dense cores in nearby star formation regions Reviewed

    Yasuo Fukui, Akira Mizuno, Tomoo Nagahama, Keiji Imaoka, and Hideo Ogawa

    Memorie della Societa Astronomica Italiana   Vol. 62   page: 801-812   1991

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Books 2

  1. 電波50のなぜ

    長濱智生( Role: Sole author)

    名古屋大学太陽地球環境研究所  2007.2 

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    Language:Japanese

  2. 地球温暖化50のなぜ

    水野亮、長濱智生( Role: Joint author)

    名古屋大学太陽地球環境研究所  2005.2 

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    Language:Japanese

Presentations 42

  1. Exploring Short-term Variations in Mesospheric Ozone due to Large-scale Solar Flares Using a Ground-based Millimeter-wave Radiometer at Rikubestu, Japan and Aura/MLS Ozone Measurements International conference

    Tomoo Nagahama, Akira Mizuno, Taku Nakajima, Tianliang Yang

    Quadrennial Ozone Symposium (QOS 2021)  2021.10.5 

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    Event date: 2021.10

    Language:English   Presentation type:Poster presentation  

    Venue:online  

  2. Study on a possible detection of short-term variations in mesospheric ozone caused by large solar flares

    Tomoo Nagahama, Akira Mizuno, Taku Nakajima

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  3. Development of a new ISEE Chemical Lagrangian Model to elucidate the atmospheric composition changes in the mesosphere International conference

    Tomoo Nagahama, Shingo Nakanishi, Fujita Ken, Tac Nakajima, Akira Mizuno

    JpGU-AGU Joint Meeting 2020 

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    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  4. 高分解能FTIRによる大気汚染関連物質の変動解析

    長濱智生, 森野勇

    第24回大気化学討論会 

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    Event date: 2019.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  5. Long-term monitoring of tropospheric and stratospheric trace gases using ground-based FTIRs in Japan Invited International conference

    Tomoo Nagahama

    NDACC Science Workshop in Tsukuba 

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    Event date: 2019.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tsukuba, Japan   Country:Japan  

  6. 陸別高分解能FTIRによる大気汚染物質の対流圏カラム平均混合比の長期変動観測

    長濱智生, 森野勇, 中西慎吾

    日本地球惑星科学連合2019年大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  7. Long-term measurements of the column-averaged mixing ratios of tropospheric substances related to the air pollution using ground-based FTIRs at Rikubetsu International conference

    2019 Joint NDACC-IRWG and TCCON Meeting 

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    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Country:New Zealand  

  8. 南極昭和基地ミリ波放射分光計による中間圏一酸化窒素カラム量の変動解析

    長濱智生, 水野亮, 中島拓, 大山博史, 児島康介, 江尻省, 冨川喜弘, 堤雅基, 中村卓司, 佐藤薫

    第144回地球電磁気・地球惑星圏学会総会・講演会 

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    Event date: 2018.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  9. Long-term variations of HCN in the lower stratosphere measured with ground-based FTIRs over Hokkaido, Japan International conference

    Tomoo Nagahama, Isamu Morino

    2018 joint 14th iCACGP Quadrennial Symposium and 15th IGAC Science Conference 

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    Event date: 2018.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  10. Long-term variations of HCN in the lower stratosphere using ground-based FTIRs over Hokkaido, Japan International conference

    NDACC-IRWG and TCCON Annual Meeting 2018 

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    Event date: 2018.6

    Language:English   Presentation type:Poster presentation  

    Country:Mexico  

  11. 陸別FTIR観測に見られる成層圏HCNの長期変動

    長濱智生, 森野勇

    第23回大気化学討論会 

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    Event date: 2017.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  12. A long-term monitoring of trace gases in troposphere and stratosphere retrieved from high-resolution FTIR measurements at Rikubetsu in Hokkaido, Japan International conference

    Tomoo Nagahama, Isamu Morino, Sazuki Sunada

    JpGU-AGU Joint Meeting 2017 

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    Event date: 2017.5

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  13. Four years measurements of the mesospheric nitric oxide (NO) and ozone with a ground-based millimeter-wave spectral radiometer at Syowa station, Antarctica International conference

    Nagahama T., Mizuno A., Nakajima T., Ohyama H., Kojima Y., Ejiri M. K., Tomikawa Y., Tsutsumi M., Nakamura T.

    Quadrennial Ozone Symposium 2016 (QOS2016) 

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    Event date: 2016.9

    Language:English   Presentation type:Poster presentation  

    Venue:Edinburgh, United Kingdom   Country:United Kingdom  

  14. 南極昭和基地ミリ波放射分光観測装置による太陽極大期における中間圏一酸化窒素カラム量の観測

    長浜智生, 水野亮, 中島拓, 大山博史, 児島康介, 江尻省, 冨川喜弘, 堤雅基, 中村卓司

    日本地球惑星科学連合2016年大会 

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    Event date: 2016.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  15. Annual and Inter-annual Variations of the Mesospheric Column Amount of Nitric Oxide (NO) Observed with a Millimeter-wave Radiometer at Syowa Station in Antarctica International conference

    T. Nagahama, M. Uemura, A. Mizuno, T. Nakajima, H. Ohyama, Y. Miyoshi, Y. Kojima, Y. Isono, M. Tsutsumi, and T. Nakamura

    Asia Oceania Geosciences Society 12th Annual Meeting (AOGS2015) 

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    Event date: 2015.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:Singapore  

  16. Recent activities of Moshiri and Rikubetsu International conference

    T. Nagahama and I. Morino

    Network for the Detection of Atmospheric Composition Change (NDACC) Infrared Working Group (IRWG) 2015 meeting 

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    Event date: 2015.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Canada  

  17. Ground-based millimeter-wave measurements of ozone and nitric oxide in the mesosphere and lower thermosphere in the southern hemisphere International conference

    T. Nagahama, A. Mizuno, Y. Isono, Y. Kojima, H. Maezawa, T. Kuwahara, M. Tsutsumi, T. Nakamura, J. O. Salvador, E. J. Quel

    Asia Oceania Geosciences Society 10th Annual Meeting 

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    Event date: 2013.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Australia  

  18. Site report of Moshiri and Rikubetsu International conference

    T. Nagahama, A. Mizuno and Y. Matsumi

    Network for the Detection of Atmospheric Composition Change (NDACC) Infrared Working Group (IRWG) 2013 meeting 

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    Event date: 2013.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  19. Temporal variations of ozone distribution in upper stratosphere and mesosphere measured with SMILES International conference

    T. Nagahama, S. Yashima, T. Kuwahara, R. Tanada, and A. Mizuno

    Quadrennial Ozone Symposium 2012 

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    Event date: 2012.8

    Language:English   Presentation type:Poster presentation  

    Country:Canada  

  20. Site report of Moshiri and Rikubetsu International conference

    T. Nagahama, A. Mizuno and Y. Matsumi

    Network for the Detection of Atmospheric Composition Change (NDACC) Infrared Working Group (IRWG) 2011 meeting 

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    Event date: 2011.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  21. Millimeter-wave band observations of middle atmosphere International conference

    T. Nagahama, A. Mizuno, H. Maezawa, T. Kuwahara, Y. Isono, T. Iino, R. Tanada, S. Yashima, N. Toriyama and Y. Kojima

    Workshop on Submillimeter-Wave Receiver Technologies in Eastern Asia 

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    Event date: 2010.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  22. Site report: Moshiri and Rikubetsu International conference

    T. Nagahama, A.Mizuno and Y. Matsumi

    Network for the Detection of Atmospheric Composition Change (NDACC) Infrared Working Group (IRWG) 2010 meeting 

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    Event date: 2010.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Australia  

  23. Ground-based millimeter-wave measurements of mesospheric NO2 in Atacama highland, Chile International conference

    6th Annual General Meeting of Asia Oceania Geosciences Society (AOGS2009) 

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    Event date: 2009.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Singapore  

    We started to monitor the vertical distribution of mesospheric NO2, which is expected to be enhanced at a penetration event of high energy particles, by using a ground-based millimeter-wave radiometer equipped with an SIS mixer receiver and a digital spectrometer, which provides extremely high sensitivity and sufficient frequency resolution. We have detected the NO2 spectrum whose peak intensity is ~50 mK.

  24. JEM/SMILESの検証実験計画

    長浜智生、塩谷雅人、高柳昌弘、SMILESサイエンスチーム

    第14回大気化学討論会 

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    Event date: 2008.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

    国際宇宙ステーション搭載サブミリ波放射サウンダ(JEM/SMILES)は、成層圏オゾンやオゾン破壊に主要な役割を果たすハロゲン化合物などの大気微量分子からの放射スペクトルを、4 K冷却超伝導受信器を用いて高い感度で観測することにより、地球規模でのそれらの分布と時間変化を明らかにすることを目指した衛星センサーである。JEM/SMILESで観測される大気微量分子のうち、O3、HClは1スキャンの観測で10%の精度で成層圏における高度分布が得られる見込みである。また、ClOやBrO、HOCl、HO2などは、10度四方の領域において数日~1ヶ月程度

  25. 名大STE研高分解能FTIR による大気微量分子の長期変動観測

    長濱智生

    太陽から地球までシンポジウム 

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    Event date: 2008.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  26. Measurements of mesospheric O3, NO2 and HO2 with a ground-based millimetre-wave radiometer at Atacama, Chile International conference

    Quadrennial Ozone Symposium 2008 

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    Event date: 2008.6

    Language:English   Presentation type:Poster presentation  

    Mesospheric chemical composition is largely varied due to environmental changes of the earth outside such as penetration of solar proton particles into the upper atmosphere. In order to investigate the relationship between the chemical composition in the mesosphere and the space weather, and to estimate influences of environmental changes on the chemical composition, we started a project to measure O3, NO2 and HO2 distributions in the mesosphere continuously with a ground-based millimeter-wave r

  27. 南米チリ・アタカマ高地における成層圏ClOのミリ波観測

    長浜智生、水野 亮、前澤裕之、桑原利尚、寺田良平、森平淳志

    日本地球惑星科学連合大会2008 

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    Event date: 2008.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

    我々は、チリ・アタカマ高地に設置してある名大STE研のミリ波放射分光計を用いて、周波数204 GHz帯のClOスペクトルの連続観測を開始した。アタカマ高地は晴天率が高く、204GHz帯における典型的な大気の光学的厚さは0.1以下で、ミリ波観測に適した場所である。我々の観測装置のシステム雑音温度は204 GHzで約200K(SSB)であり、1-2時間の積分時間で十分なS/NのClOスペクトルを取得でき、高度30から70kmまで高度分布を求めることが可能である。これまでにClOスペクトルを約10日分取得することができた。発表では、観測装置の概要とClO高

  28. 名大STE研母子里・陸別FTIRによる成層圏・対流圏微量分子のモニタリング観測

    長浜智生、村山智史、水野 亮、近藤 豊

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    Event date: 2008.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

    名古屋大学太陽地球環境研究所(STEL)では1995年5月に北海道足寄郡陸別町、1996年4月には北海道雨竜郡幌加内町母子里に高分散フーリエ変換型赤外分光計(FTIR)を設置し、大気中の微量分子による太陽光吸収スペクトルの観測から成層圏および対流圏大気微量分子の計測を行っている。10年以上にわたる連続した成層圏・対流圏の各種大気微量分子の観測データセットは、日本においては唯一であり、大気組成変動の状況と変動メカニズムの研究を行ううえで貴重な資料となっている。発表では、これまで10年に及ぶ観測とそこから生まれたサイエン

  29. JEM/SMILES Experiment: A Validation Plan

    SMILES International Workshop 2008 

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    Event date: 2008.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    We introduce a validation plan of the JEM/SMILES measurements.

  30. Ground-based Millimeter-wave Measurements of Vertical Distribution of H2-18O in Upper Stratosphere and Mesosphere over Atacama, Chile International conference

    4th Annual Meeting of the Asia Oceania Geosciences Society (AOGS2007) 

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    Event date: 2007.7

    Language:English   Presentation type:Oral presentation (invited, special)  

  31. 南米チリ22GHz帯水蒸気ラジオメータの観測精度評価

    長浜智生、水野亮、前澤裕之、桑原利尚、杉本朋世、松浦真人

    第17回大気化学シンポジウム 

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    Event date: 2007.1

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  32. Ground-based Millimeter-wave Measurements of Vertical H2-18O Distribution at Atacama, Chile International conference

    2006 American Geophysical Union (AGU) Fall Meeting 

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    Event date: 2006.12

    Language:English   Presentation type:Poster presentation  

  33. A Plan for Continuous Measurements of Mesospheric Ozone, NOx and HOx with a Ground-based Millimeter-wave Radiometer in Chile International conference

    36th COSPAR Scientific Assembly 

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    Event date: 2006.7

    Language:English   Presentation type:Poster presentation  

  34. A plan of the millimeter-wave measurements of mesospheric ozone, HOx and NOx

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    Event date: 2006.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  35. ミリ波による中間圏大気組成変動観測計画

    長浜智生、水野 亮、前澤裕之、桑原利尚、杉本朋世、松浦真人、村山智史、森平淳志

    第16回大気化学シンポジウム 

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    Event date: 2006.1

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  36. Short-term Variations of Stratospheric Ozone Measured by Using a Ground-based Millimeter-wave Radiometer at Rikubetsu, Japan International conference

    2005 American Geophysical Union (AGU) Fall Meeting 

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    Event date: 2005.12

    Language:English   Presentation type:Poster presentation  

  37. Ground-based Millimeter-wave Measurements of Stratospheric Water Vapor and its isotopes in Chile International conference

    Intenational Workshop on Submillimeter Wave Earth Observation 

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    Event date: 2005.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  38. Continuous Measurements of the Stratospheric and Mesospheric Ozone by Using Ground-based Millimeter-wave Radiometers International conference

    International Conference on Submillimeter Science and Technology (ICSST-04) 

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    Event date: 2004.10

    Language:English   Presentation type:Oral presentation (invited, special)  

  39. Long-term monitoring of the stratospheric and mesospheric ozone with the two ground-based millimeter-wave radiometers in NIES, Japan International conference

    1st Annual Meeting of the Asia Oceania Geosciences Society (AOGS2004) 

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    Event date: 2004.7

    Language:English   Presentation type:Oral presentation (invited, special)  

  40. Measurements of Temporal Variations of Ozone and Other Minor Constituents in the Mesosphere by Using a Ground-based Millimeter-wave Radiometer

    Climate And Weather of the Sun-Earth System (CAWSES) Kickoff Meeting 

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    Event date: 2004.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  41. Short-term Variations of the Stratospheric Ozone Measured with the Ground-based Millimeter-wave Radiometer at Rikubetsu, Japan International conference

    Quadrennial Ozone Symposium 2004 

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    Event date: 2004.6

    Language:English   Presentation type:Poster presentation  

  42. CONTINUOUS MEASUREMENTS OF THE VERTICAL PROFILE OF OZONE IN THE STRATOSPHERE USING THE GROUND-BASED MILLIMETER-WAVE RADIOMETER IN RIKUBETSU, JAPAN International conference

    4th International Workshop on Global Change: Connection to the Arctic 2003 (GCCA-4) 

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    Event date: 2003.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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Research Project for Joint Research, Competitive Funding, etc. 10

  1. 地上設置型計測器による二酸化炭素測定データの収集業務のうち、計測器の校正と機器特性の導出による研究委託業務

    2018.12 - 2019.3

    受託研究 

    松見豊

  2. 平成21年度 陸別ミリ波放射計のオゾン高度分布解析法とその長期精度の確保・評価に関する研究委託業務

    2009.8 - 2010.3

    独立行政法人国立環境研究所 

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    Grant type:Competitive

    陸別成層圏総合観測室のミリ波放射計で取得されたオゾンスペクトルから得られたオゾン混合比の高度分布解析データについて、新たに導入された冷却黒体の精度評価と過去の結果との整合性、デジタル分光計のスパイク状ノイズの解析精度への影響評価等に関する研究を行った。

  3. 平成20年度 デジタル分光計による広帯域高分解能ミリ波オゾンスペクトルの高度分布解析法とその精度評価に関する研究委託業務

    2008.8 - 2009.3

    独立行政法人国立環境研究所 

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    Grant type:Competitive

    陸別成層圏総合観測室のミリ波分光計に広帯域高分解能デジタル分光計を搭載した場合のオゾン混合比高度分布解析法について、解析精度、高度分解能、観測上限及び下限高度およびデジタル分光計特有の問題点等に関する研究を行った。

  4. 平成19年度 陸別ミリ波オゾン放射計によるオゾン高度分布観測の精度評価管理及び時間変動解析に関する研究

    2007.5 - 2008.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  5. 平成18年度 地上FTIR装置を用いた観測及び高精度高度分布導出に関する研究

    2006.8 - 2007.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  6. 平成18年度 陸別ミリ波オゾン放射計によるオゾン高度分布観測の精度評価管理及び時間変動解析に関する研究

    2006.6 - 2007.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  7. 平成17年度 陸別ミリ波オゾンデータ高度分布解析の高度化に関する研究

    2005.10 - 2006.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  8. 平成17年度 地上FTIR装置を用いた観測及び高精度高度分布導出に関する研究

    2005.8 - 2006.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  9. 平成16年度 地上FTIR装置を用いた観測及び高精度高度分布導出に関する研究

    2004.12 - 2005.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

  10. 平成16年度 陸別ミリ波オゾンデータの実時間解析手法の研究

    2004.12 - 2005.2

    独立行政法人国立環境研究所 

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    Grant type:Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 11

  1. 赤外分光法による大気中イソプレンの動態と大気質への影響の長期変動に関する研究

    Grant number:21H03589  2021.4 - 2024.3

    長濱 智生

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\16640000 ( Direct Cost: \12800000 、 Indirect Cost:\3840000 )

  2. 南北両極から探る高エネルギー粒子が大気環境に与える影響の観測的研究

    2019.4

    科学研究費補助金  基盤研究(B)

    水野亮

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    Authorship:Coinvestigator(s) 

  3. 南米SAVER-Net観測網を用いたエアロゾル・大気微量気体の動態把握

    2018.10

    科学研究費補助金 

    水野亮

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    Authorship:Coinvestigator(s) 

  4. 太陽極大期の高エネルギー粒子の降込みが極域中間圏大気に及ぼす影響の観測的研究

    2011.4 - 2015.3

    科学研究費補助金  基盤研究(B)

    水野亮

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    Authorship:Coinvestigator(s) 

    太陽活動が地球大気に与える影響をとらえるため、南極昭和基地において3年間にわたるミリ波分光モニタリングを実施した。その結果、中間圏から下部熱圏の一酸化窒素(NO)が不定期に数日間で増加する短期変動と極夜前後に4ヶ月程度にわたり増加する季節変動を示すことを明らかにした。短期変動はそれまで注目されていた太陽陽子よりも磁気嵐の発生に伴い加速される放射線帯の高エネルギー電子が主要な役割を担っていること、季節変動は光化学反応と高エネルギー電子の降り込みが要因となっていることを観測的に明瞭に示した。

  5. Development of a measuring system of column-averaged mixing ratio of greenhouse gases with an optical spectrum analyzer operated in near infrared region

    2011.4 - 2014.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

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    Authorship:Principal investigator 

  6. A study of influence on stratospheric composition in mid-latitude region by Antarctic ozone hole based on ground-based millimeter-wave measurements

    2008.4 - 2013.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

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    Authorship:Principal investigator 

  7. 準ミリ波水蒸気分光放射計による中層大気水蒸気・オゾンの観測的研究

    2006.4 - 2010.3

    科学研究費補助金  基盤研究(B)

    水野亮

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    Authorship:Coinvestigator(s) 

    オゾン破壊に関与するHOxのソースであり大気の放射バランスでも重要な役割を果たす成層圏水蒸気の鉛直分布を計測するため、HEMT増幅器とデジタルFFT分光計を用いた22GHz帯マイクロ波分光計を開発した。冷却増幅器を用いることなく常温で運用可能なため、軽量で可搬性に優れている。十分な感度を有し、対流圏での吸収により平地からの観測が困難であった成層圏水蒸気の昼夜を通した連続観測を可能にした。

  8. チリ共和国アタカマにおける成層圏・中間圏の水蒸気同位体およびオゾンの観測的研究

    2006.4 - 2010.3

    科学研究費補助金  基盤研究(B)

    水野亮

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    Authorship:Coinvestigator(s) 

    標高4800mのチリ共和国アタカマ高地に180GHz帯から260GHz帯の高感度ミリ波分光観測装置を設置し、中層大気中の水蒸気およびオゾン破壊関連物質の新たな観測拠点を整備した。水蒸気同位体H_2^<18>Oの4カ月にわたる連続観測を遂行しAURA/MLSのH_2Oデータと比較することにより、アタカマ高地上空で春から夏にかけてこの高度で^<18>Oの同位体偏重度δ^<18>Oが増加していることを見出した。

  9. A study of chemical composition changes in the mesosphere related with penetration of magnetospheric high energy electrons

    2006.4 - 2009.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

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    Authorship:Principal investigator 

  10. 対流圏OHラジカルの非破壊定常観測のためのTHz帯ヘテロダインHEB検出器の開発

    2005.4 - 2007.3

    科学研究費補助金 

    前澤裕之

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    Authorship:Coinvestigator(s) 

    新超伝導素材NbTiNのナノ細線を集積した2次元準光学HEBミクサー素子の製作プロセス1をほぼ確立した。またMgO(100)結晶超半球レンズを製作した他、素子の冷却マウントホルダーや、IF信号を取り出す誘電体基板回路、オフセット放物面鏡の製作を行った。一方MgO基板は1-2年のオーダーで表面が劣化することが分かった。
    HEBミクサー素子を、実際にワイヤーボンダーで結線してマウントし、冷却サイクルや機械式冷凍機の振動に(実用に)対する耐久試験を行った。その結果、素子IV超伝導特性は劣化することなく、良好な特性を維持していた。また、冷却サイクルや振動に対し、誘電体レンズや誘電体基板は破損せずに良好な状態を維持しており、またワイヤーも、断線等も生じず、冷却時の収縮率の違いに対して十分耐久性を持つことを確認できた。
    200GHz帯の信号を2次元方向に挿引し、その応答から推定したビーム形状が、準光学マウントの設計と矛盾の無いことを確認した。また素子は周辺の300Kの輻射に対してボロメトリックな応答を見せることが分かった。

  11. チリ熱帯域における成層圏・中間圏の水蒸気同位体分子のミリ波同時観測

    2003.4 - 2005.3

    科学研究費補助金  基盤研究(A)

    水野亮

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    本研究は、成層圏において20年あまりの間年率1%程度で増加し1990年代末より減少傾向に推移した水蒸気の振る舞いとその増減のメカニズムを明らかにするため、2周波ミリ波分光放射計を新たに開発・製作し、南米チリ共和国の4800mのアタカマ高地に設置して水蒸気分子の同位体比の連続測定を行うことを目的とした。
    2年間の研究期間を通し、(1)2周波同時分光観測装置の製作、(2)チリ共和国ラス・カンパナス天文台におけるH_2^<18>O観測と解析アルゴリズムの改良、(3)アタカマ高地におけるミリ波水蒸気観測施設の立ち上げと観測を行った。
    (1)に関しては、多周波同時受信の基礎技術のひとつであるサイドバンド分離型超伝導受信機の開発実験と2つの超伝導受信器の共通冷却システム、2系統の独立した光学系と光学系切り替えのための駆動鏡制御系の製作を行い、観測システムを組み上げた。装置トラブルのため研究期間内のアタカマ高地での2周波同時観測はできなかったが、実験室において観測システムの基本動作の確認は終了している。(2)H15年9月からH16年2月まで連続してH_2^<18>Oのモニタリング観測を行ない、解析アルゴリズムを改良した。H_2^<18>Oスペクトルは強度がアンテナ温度50mK程度と微弱なため、これまで単発的な観測例はあったが、本観測のような連続的観測はなく、H_2Oと同様の季節変動を示すことが明かになった。(3)200GHz帯のH_2^<18>O、オゾンに加え、183GHz帯のH_2Oスペクトルを取得に成功した。200GHz帯での大気の光学的厚みは0.05程度と極めて良好であったが、183GHzでは標高4,800mでも0.3-0.5程度であった。高地作業と不測の装置障害のため当初計画よりも観測装置の立ち上げが遅れたが、現時点では基本的な問題は解決されている。本研究により、アタカマ高地における水蒸気観測の基盤が確立された。

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Teaching Experience (On-campus) 17

  1. 地球大気計測論

    2019

  2. 地球大気計測論

    2018

  3. 地球大気計測論

    2017

  4. 地球大気計測論

    2015

  5. 地球大気計測論

    2014

  6. 地球大気計測論

    2013

  7. 宇宙情報処理特論

    2011

  8. 電磁波工学

    2011

  9. 電磁波工学

    2010

  10. 宇宙情報処理特論

    2009

  11. 電磁波工学

    2009

  12. 電磁波工学

    2008

  13. 電磁波工学

    2007

  14. 宇宙情報処理特論

    2007

  15. 電磁波工学

    2006

  16. 電磁波工学

    2005

  17. 宇宙情報処理特論

    2005

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