| | 主な研究成果 |  |
| (1)論文発表 (海外40件) | |
| Shan-Hu Lee, Hajime Akimoto, Hideaki Nakane, Yoshikatsu Kinjo, Lower tropospheric ozone trend observed in 1989-1997 at Okinawa, Japan, Geophysical Research Letters, 25(10), 1637-1640, 1998 | |
| Hirokawa, J., K. Onaka, Y. Kajii and H. Akimoto, Heterogeneous processes involving sodium halide particles and ozone: Molecular bromine release in the marine boundary layer in the absence of nitrogen oxides, Geophys. Res. Lett., 25(13), 2449-2452, 1998. | |
| Pochanart, P., J. Hirokawa, Y. Kajii, and H. Akimoto, Surface ozone and carbon monoxide measurement at Oki Islands, Japan, During March 1994 to February 1996, in Atmospheric Ozone ; proceedings of the XVIII Quadrennial Ozone Symposium, Eds. R.D. Bojkov and G. Visconti, Edigrafital S.p.A. -S. Atto (TE). Italy, 1998. | |
| Kajii Y., H. Akimoto, Y. Komazaki, S. Tanaka, H. Mukai, K. Murano, and J.T. Merrill, Ground-base measurements of ozone, carbon monoxide, and acidic trace gases at Oki island, Japan during PEM West (B) campaign, in Atmospheric Ozone ; proceedings of the XVIII Quadrennial Ozone Symposium, Eds. R.D. Bojkov and G. Visconti, Edigrafital S.p.A. -S. Atto (TE). Italy, 1998. | |
| Kajii, Y., K. Someno, H. Tanimoto, J. Hirokawa, H. Akimoto, T. Katsuno, and J. Kawara, Evidence for the seasonal variation of photochemical activity of tropospheric ozone: Continuous observation of ozone and CO at Happo, Japan, Geophys. Res. Lett., 25(18), 3505-3508, 1998. | |
| Mochida, M., J. Hirokawa, Y. Kajii, and H. Akimoto, Heterogeneous reaction of Cl2 with sea salts at ambient temperature: Implications for halogen exchange in the atmosphere, Geophys. Res. Lett., 25(21), 3927-3930, 1998. | |
| Komazaki, Y., Y.. Narita, and S. Tanaka, Development of an automated measurement system by using a diffusion scrubber and high-performance liquid chromatography for the monitoring of formaldehyde in the automotive exhaust gas, Analyst, 123, 2343-2349, 1998. | |
| Tanaka, S., Y. Narita, N. Sato, T. Fukasawa, S.J. Santosa, K. Yamanaka, and T. Ootoshi, Rapid and simultaneous multi-element analysis of atmospheric particulate matter using inductively coupled plasma mass spectrometry with laser ablation sample introduction, J. Anal. Atom. Spectr., 13, 135-140, 1998. | |
| Kato, S., H. Akimoto, and C.A.M. Brenninkmeijer, Stable isotopic ratio measurements of CO from automobile exhaust and in the atmosphere of a semi urban area, Mainz, Germany, Geochem. J. 33, 73-77, 1999. | |
| Pochanart, P., J. Hirokawa, Y. Kajii, H. Akimoto, and M. Nakao, The influence of regional scale anthropogenic activity in Northeast Asia on seasonal variations of surface ozone and carbon monoxide observed at Oki, Japan, J. Geophys. Res. 104, 3621-3631, 1999. | |
| Komazaki, Y., M. Hiratsuka, Y. Narita, S. Tanaka, and T. Fujita, The development of an automated continuous measurement system for the monitoring of HCHO and CH3CHO in the atmosphere by using an annular diffusion scrubber coupled to HPLC, Fresenious J. Anal. Chem., 363, 686-695, 1999. | |
| Akimoto, H., P. Pochanart, J. Hirokawa, and Y. Kajii, Seasonal variation of surface ozone at remote sites in Northeast Asia: Comparison with European data, Proceedings of EUROTRAC Symposium ’98, 312-316, 1999. | |
| Kanaya, Y., S. Sadanaga, J. Matsumoto, U.K. Sharma, J. Hirokawa, Y. Kajii and H. Akimoto, Nighttime observation of the HO2 radical by an LIF instrument at Oki island, Japan, and its possible origins, Geophys. Res. Lett., 26, 2179-2182, 1999. | |
| Kato S., H. Akimoto, T. Rochmann, M. Braunlich, and C.A.M. Brenninkmeijer, Stable isotopic compositions of carbon monoxide from biomass burning experiments, Atmos. Environ. 33, 4357-4362, 1999. | |
| Tanimoto, H., J. Hirokawa, Y. Kajii, and H. Akimoto, A new measurement technique of peroxyacetyl nitrate at part per trillion levels: Gas chromatography / negative ion chemical ionization mass spectrometry, J. Geophys. Res. 104, 21343-21354, 1999. | |
| Kajii, Y., Y. Kanaya, Y. Sadanaga, J. Hirokawa and H. Akimoto, Measurement of HOx radicals and their chemistry in the troposphere, Recent Research Developments in Geophysical Research, Recent Res. Develop. Geophys., 2, 99-111, 1999. | |
| Narita, D., P. Pochanart, J. Matsumoto, K. Someno, H. Tanimoto, J. Hirokawa, Y. Kajii, H. Akimoto, M. Nakao, T. Katsuno, Y. Kinjo, Seasonal variation of carbon monoxide at remote sites in Japan, Chemosphere: Global Change Science 1, 137-144, 1999. | |
| Komazaki, Y., H. Shimizu, and S. Tanaka, A new measurement method for nitrogen oxides in the air using annular diffusion scrubber coated with titanium dioxide and hydroxyapatite under ultraviolet illumination, Atmos. Environ., 33, 4363-4371, 1999. | |
| Komazaki, Y., Y. Hamada, T. Fujita, and S. Tanaka, Development of automated, simultaneous and continuous measurement system by using a diffusion scrubber coupled to ion chromatography for monitoring trace acidic and basic gases (HCl, HNO3, SO2 and NH3) in the atmosphere, The Analyst, 124, 1151-1157, 1999. | |
| Narita, Y., A. Fukazawa, S. Tanaka, S.J. Santosa, A study on the concentration, distribution and behavior of metals in the atmospheric particulate matter over the north pacific ocean by using inductively coupled plasma mass spectrometry equipped with laser ablation as a sample introduction, J. Geopys. Res., 104, 21, 26859-26866, 1999. | |
| Yokouchi, Y., H.-J. Li, T. Machida, S. Aoki, and H. Akimoto, Isoprene in the marine boundary layer (Southeast Asian Sea, Eastern Indian Ocean, Southern Ocean): Comparison with DMS and Bromoform, J. Geophys. Res., 104, 8067-8076, 1999. | |
| Li, H.-J., Y. Yokouchi, and H. Akimoto, Measurement of methyl halides in marine atmosphere, Atmos. Environ., 33, 1881-1887, 1999. | |
| Kato, S., Y. Kajii, H. Akimoto, M. Braenlich, T. Roeckmann, and C. Brenninkmeijer, J. Observed and modeled seasonal variation of 13C, 18O, and 14C of atmospheric CO at Happo, a remote site in Japan, and a comparison with other records, J. Geophys. Res., 105, 8891-8900, 2000. | |
| Sharma, U.K., Y. Kajii and H. Akimoto, Characterization of NMHCs in downtown urban center Kathmandu and rural site Nagarkot in Nepal, Atmos. Environ., 34, 3297-3307, 2000. | |
| Mauzerall, D.L., D. Narita, H. Akimoto, L. Horowitz, S. Walters, D.A. Hauglustaine, and G. Brasseur, Seasonal characteristics of tropospheric ozone production and mixing ratios over East Asia: A global three-dimensional chemical transport model analysis, J. Geophys. Res., 105, 17, 895-17, 910, 2000. | |
| Tanimoto, H., J. Hirokawa, Y. Kajii, and H. Akimoto, Characterization of gas chromatography /negative ion chemical ionization mass spectrometry for ambient measurement of PAN: Potential interference and long-term sensitivity drift, Geophys. Res. Lett., 27, 2089-2902, 2000. | |
| Sharma, U.K., Y. Kajii, and H. Akimoto, Seasonal variation of C2-C6 NMHC at Happo, a remote site in Japan, Atmos. Environ., 34, 4447-4458, 2000. | |
| Kanaya, Y., Y. Sadanaga, J. Matsumoto, U. Sharma, J. Hirokawa, Y. Kajii, and H. Akimoto, Daytime HO2 concentrations at Oki Island, Japan, in summer 1998: Comparison between measurement and theory, J. Geophys. Res., 105, 24, 205-24, 222, 2000. | |
| Mochida, M., J. Hirokawa and H. Akimoto, Unexpected large uptake of O3 with sea salts and their Br2 formation, Geophys. Res. Lett., 27, 2629-2632, 2000. | |
| Tanimoto, H., Y. Kajii, J. Hirokawa, and H. Akimoto, The atmospheric impact of boreal forest fires in far eastern Siberia on the seasonal variation of carbon monoxide: Observations at Rishiri, a northern remote island in Japan, Geophys. Res. Lett., 27, 4073-4076, 2000. | |
| Sharma, U.K., Y. Kajii, and H. Akimoto, Measurement of NMHCs at Oki Island, Japan: An evidence of long range transport, Geophys. Res. Lett., 27(16), 2505-2508, 2000. | |
| Kanaya, Y., Y. Sadanaga, J. Hirokawa, Y. Kajii, and H, Akimoto, Development of a Ground-based LIF instrument for measuring HOx radicals: instrumentation and calibration, J. Atmos. Chem., 38, 73-110, 2001. | |
| Tanimoto, H.H. Furutani, S. Kato, J. Matsumoto, and H. Akimoto, Springtime measurement of ozone, nonmethane hydrocarbons, and oxidized nitrogen species at Rishiri, 45°N in East Asian Pacifid Rim Region during RISOTTO 2000: NOy Speciation and photo-chemistry, Proceedings, American Meteorological Society, 52-58, 2001. | |
| Pochanart, P., J. Hirokawa, Y. Kajii., H. Akimoto, J. Kreasuwun, W. Geeratihadaniyom, P. Sukasem, and M.S. Monthip, Tropical tropospheric ozone observed in Thailand, Atmos. Environ., 35, 2657-2668, 2001. | |
| Tanimoto, H., and H. Akimoto, A new peroxycarboxylic nitric anhydride identified in the atmosphere: CH2=CHC(O)OONO2 (APAN), Geophys. Res. Lett, 28(14), 2831-2834, 2001. | |
| Furutani, H., and H. Akimoto, Development and characterization of fast measurement system for gas phase nitric acid with chemical ionization mass spectrometer in marine boundary layer, J. Geophys. Res., (accepted). | |
| Kanaya, Y., Y. Sadanaga, K. Nakamura, and H. Akimoto, Behavior of OH and HO2 radicals during the Observations at a Remote Island of Okinawa (ORION99) field campaign: 1. Observation using a laser-induced fluorescence instrument, J. Geophys. Res. (accepted) | |
| Kanaya, Y., J. Matsumoto, S. Kato, and H. Akimoto, Behavior of OH and HO2 radicals during the Observations at a Remote Island of Okinawa (ORION99) field campaign: 2. Comparison between observations and calculations, J. Geophys. Res. (accepted) | |
| Pochanart, P., H. Akimoto, M. Izumi, and J. Staehelin, Surface ozone at the Swiss Alpine site Arosa: Study of influence of European precursor emissions and hemispheric ozone background by trajectory analysis, Atmos. Environ. (accepted) | |
| Komazaki, Y., T. Inoue, and S. Tanaka, Automated measurement system for H2O2 in the atmosphere by the diffusion scrubber sampling and HPLC analysis of Ti(IV)-PAR-H2O2 complex, The Analyst (accepted) | |
| (2)口頭発表 | |
| 1. 招待講演 (海外5件) | |
1999.11.21-24 The 8th Asian Chemical Congress (International Convention Center, Taipei)
Hajime Akimoto “Distribution and variation of tropospheric ozone in East Asia” | |
2000.8.22-27 The Third Vereshchagin Baikal Conference (Limnological Institute, Irkutsk)
Akimoto H. “Regional background air quality in East Asia” | |
2000.10.11-13 International Conference of Engineering and Technological Sciences 2000 (Xindadu Hotel, Beijing)
Session on Environmental Protection and High Technology
Hajime Akimoto “Comparison of Regional Background Ozone in East Asia and Europe” | |
2000.10.31-11.2 Seventh International Conference on Atmospheric Sciences and Applications to Air Quality (ASAAQ) (The Grand Hotel, Taipei)
Hajime Akimoto, Yugo Kanaya, Yasuhiro Sadanaga, Kenji Nakamura, Jun Matsumoto, Usha Sharma, Shungo Kato, Jun Hirokawa, and Yoshizumi Kajii “Measurement of HOx radicals in the marine boundary layer at Oki and Okinawa” | |
2000.11.10-11 2000 Fall Meeting of Korean Society of Atmospheric Environment (Kyungsung University, Pusan)
Hajime Akimoto “Regional Air Pollution Problems in East Asia and International Role of Research Exchange” | |
| 2. 口頭講演·ポスター発表 (国内149件、海外22件) | |
| 平成8·9年 国内44件、海外6件 | |
| 平成10年 国内34件、海外3件 | |
| 平成11年 国内38件、海外8件 | |
| 平成12年 国内33件、海外5件 | |
| (3)受賞等 | |
| 1. 受賞 | |
| なし | |
| 2. 新聞報道 | |
1) オゾンの長距離輸送
「中国大陸方面から日本にオゾン到来」、日本経済新聞、1999.1.24 | |
2) ラジカルの測定
「大気中で未知の反応探す」、神奈川新聞、1999. 7. 18
「初のラジカル測定装置」、高知新聞、1999. 7. 19
「ラジカル測定装置 オゾン生成解明に期待」、神戸新聞(朝刊·夕刊)、1999. 8. 10
「ラジカルを探せ 東大グループ測定装置を開発」、南日本新聞(夕刊)、1999. 9. 30 | |
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