研究者詳細 - 長濱　智生

論文 - 長濱　智生

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Variations of nitric oxide in the mesosphere and lower thermosphere over Antarctica associated with a magnetic storm in April 2012 査読有り

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年4月

Ground-based millimeter-wave observation of stratospheric ClO over Atacama, Chile in the mid-latitude Southern Hemisphere 査読有り

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

Atmospheric Measurement Techniques 5 巻頁： 2601-2611 2012年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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 査読有り

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

Atmospheric Measurement Techniques 5 巻 ( 8 ) 頁： 2003-2012 2012年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space: Validation of PPDF-based CO2 retrievals from GOSAT 査読有り

S. Oshchepkov, et al.

Journal of Geophysical Research 117 巻 2012年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Overview and early results of the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) 査読有り

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 115 巻 ( D23306 ) 2010年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Remotely operable compact instruments for measuring atmospheric CO2 and CH4 column densities at surface monitoring sites 査読有り

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 3 巻頁： 1-10 2010年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Column-averaged volume mixing ratio of CO2 measured with ground-based Fourier transform spectrometer at Tsukuba 査読有り

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 114 巻頁： doi:10.1029/2008JD011465 2009年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Search of SO2 in the Martian atmosphere by ground-based submillimeter observation 査読有り

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 57 巻頁： 2123-2127 2009年

Ground-based millimeter-wave observations of water vapor emission (183 GHz) at Atacama, Chile 査読有り

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 42 巻 ( 1 ) 頁： 1167-1171 2008年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

地上ミリ波分光計による陸別上空の成層圏オゾンの観測査読有り

長浜智生、中根英昭、藤沼康実、森平淳志、水野亮、小川英夫、福井康雄

気象集誌 85 巻 ( 4 ) 頁： 495-509 2007年8月

Continuous Measurements of the Stratospheric and Mesospheric Ozone by Using Ground-based Millimeter-wave Radiometers 査読有り

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) 頁： 20-23 2006年

A semi-annual variation of ozone in the middle mesosphere observed with the millimeter-wave radiometer at Tsukuba, Japan 査読有り

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

Journal of Geophysical Research -Atmospheres 108 巻頁： 10.1029/2003JD003724 2003年

Millimeter-wave radiometer for the measurement of stratospheric ClO using a superconductive (SIS) receiver installed in the southern hemisphere 査読有り

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 23 巻頁： 981-995 2002年

Ground-based millimeter-wave observations of ozone in the upper stratosphere and mesosphere at Tsukuba and Nagoya 査読有り

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

Advances in Space Research 26 巻頁： 1017-1020 2000年

Ground-based millimeterwave instrument for measurement of stratospheric ClO using a superconductive (SIS) receiver 査読有り

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

Advances in Space Research 26 巻頁： 975-978 2000年

Ground-based millimeter-wave observations of ozone in the upper stratosphere and mesosphere over Tsukuba 査読有り

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

Earth, Planets and Space 51 巻頁： 1287-1296 1999年

A spatially complete 13CO J=1-0 survey of the Orion A cloud 査読有り

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

Astronomical Journal 116 巻頁： 336-348 1998年

Observations of C18O (J=1-0) emission spectrum in the dark cloud L1211 査読有り

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

Chinese Astronomy and Astrophysics 20 巻頁： 38-44 1996年

The new observation of C18O(J=1-0) molecular emission in the Cepheus OB3 molecular cloud 査読有り

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

Astrophysical Journal 471 巻頁： 867-870 1996年

Observation of C18O (J=1-0) emission from Cepheus C 査読有り

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

Chinese Astronomy and Astrophysics 20 巻頁： 355-357 1996年

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