Search Results - "Hara, Keiichiro"

Impact of long-range transport of aerosols on the PM2.5 composition at a major metropolitan area in the northern Kyushu area of Japan by Kaneyasu, Naoki, Yamamoto, Shigekazu, Sato, Kei, Takami, Akinori, Hayashi, Masahiko, Hara, Keiichiro, Kawamoto, Kazuaki, Okuda, Tomoaki, Hatakeyama, Shiro

“…In view of the recent rapid economic growth and accompanying energy consumption in the East Asian region, particularly in China, there is much concern about…”
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Frost flowers and sea-salt aerosols over seasonal sea-ice areas in northwestern Greenland during winter–spring by Hara, Keiichiro, Matoba, Sumito, Hirabayashi, Motohiro, Yamasaki, Tetsuhide

“…Sea salts and halogens in aerosols, frost flowers, and brine play an important role in atmospheric chemistry in polar regions. Simultaneous sampling and…”
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Lung deposited surface area of atmospheric aerosol particles at three observatories in Japan by Kurihara, Kazuki, Iwata, Ayumi, Kiriya, Miho, Yoshino, Ayako, Takami, Akinori, Matsuki, Atsushi, Nishita-Hara, Chiharu, Hara, Keiichiro, Hayashi, Masahiko, Kaneyasu, Naoki, Seto, Takafumi, Fujitani, Yuji, Funato, Koji, Inoue, Kozo, Okuda, Tomoaki

“…The lung deposited surface area (LDSA) measured by diffusion charging (DC) method has been recently receiving increased attention as it is believed to…”
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Seasonal features and origins of carbonaceous aerosols at Syowa Station, coastal Antarctica by Hara, Keiichiro, Sudo, Kengo, Ohnishi, Takato, Osada, Kazuo, Yabuki, Masanori, Shiobara, Masataka, Yamanouchi, Takashi

“…We have measured black carbon (BC) concentrations at Syowa Station, Antarctica, since February 2005. The measured BC concentrations in 2005–2016 were corrected…”
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Spatio-Temporal Distributions of the Natural Non-Sea-Salt Aerosol Over the Southern Ocean and Coastal Antarctica and Its Potential Source Regions by Heintzenberg, Jost, Legrand, Michel, Gao, Yuan, Hara, Keiichiro, Huang, Shan, Humphries, Ruhi S., Kamra, Adarsh K., Keywood, Melita D., Sakerin, Sergey M.

“…More than 40 years of aerosol data including concentrations of particle number and of nine major ions collected over the Southern Ocean and coastal stations…”
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Contribution of Local and Transboundary Air Pollution to the Urban Air Quality of Fukuoka, Japan by Yoshino, Ayako, Takami, Akinori, Hara, Keiichiro, Nishita-Hara, Chiharu, Hayashi, Masahiko, Kaneyasu, Naoki

“…Transboundary air pollution (TAP) and local air pollution (LAP) influence the air quality of urban areas. Fukuoka, located on the west side of Japan and…”
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Ambient fine and coarse particles in Japan affect nasal and bronchial epithelial cells differently and elicit varying immune response by Onishi, Toshinori, Honda, Akiko, Tanaka, Michitaka, Chowdhury, Pratiti H., Okano, Hitoshi, Okuda, Tomoaki, Shishido, Daiki, Terui, Yoshihiro, Hasegawa, Shuichi, Kameda, Takayuki, Tohno, Susumu, Hayashi, Masahiko, Nishita-Hara, Chiharu, Hara, Keiichiro, Inoue, Kozo, Yasuda, Makoto, Hirano, Shigeru, Takano, Hirohisa

“…Ambient particulate matter (PM) epidemiologically exacerbates respiratory and immune health, including allergic rhinitis (AR) and bronchial asthma (BA)…”
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Dithiothreitol‐Measured Oxidative Potential of Reference Materials of Mineral Dust: Implications for the Toxicity of Mineral Dust Aerosols in the Atmosphere by Nishita‐Hara, Chiharu, Kobayashi, Hiroshi, Hara, Keiichiro, Hayashi, Masahiko

“…Oxidative stress is a mechanism that might raise the toxicity of mineral dust aerosols. We evaluated the oxidative potential (OP) of four reference materials…”
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Dithiothreitol‐Measured Oxidative Potential of Size‐Segregated Particulate Matter in Fukuoka, Japan: Effects of Asian Dust Events by Nishita‐Hara, Chiharu, Hirabayashi, Motohiro, Hara, Keiichiro, Yamazaki, Akihiro, Hayashi, Masahiko

“…Oxidative potential is an important property of particulate matter (PM) that has been regarded as a more health‐relevant metric than PM mass. We investigated…”
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Characterization of Elemental Composition and Valence State of Cyclone-collected Aerosol Particles Using EDXRF and XAFS at Three Sites in Japan by Jing, Weidong, Saito, Katsutomo, Okamoto, Takuma, Saito, Hibiki, Sugimoto, Kazuki, Nishita-Hara, Chiharu, Hara, Keiichiro, Hayashi, Masahiko, Hasegawa, Shuichi, Okuda, Tomoaki

“…The valence state and concentration of metallic pollutants are important factors contributing to the health effects of respirable particulate matter (PM);…”
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Evaluation of Transboundary Secondary Organic Aerosol in the Urban Air of Western Japan: Direct Comparison of Two Site Observations by Irei, Satoshi, Takami, Akinori, Hara, Keiichiro, Hayashi, Masahiko

“…Transboundary secondary organic aerosol (SOA) from the Asian continent may substantially influence the urban air quality of western Japan, where the local…”
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Analysis of Organic Aerosol in Fukuoka, Japan Using a PMF Method by Takami, Akinori, Miyoshi, Takao, Irei, Satoshi, Yoshino, Ayako, Sato, Kei, Shimizu, Atsushi, Hayashi, Masahiko, Hara, Keiichiro, Kaneyasu, Naoki, Hatakeyama, Shiro

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Influence of Trans-Boundary Air Pollution on the Urban Atmosphere in Fukuoka, Japan by Yoshino, Ayako, Takami, Akinori, Sato, Kei, Shimizu, Atsushi, Kaneyasu, Naoki, Hatakeyama, Shiro, Hara, Keiichiro, Hayashi, Masahiko

“…To understand the influence of trans-boundary air pollution on the air quality of Fukuoka, the mass concentration and chemical composition of fine particulate…”
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Short-term variation in atmospheric constituents associated with local front passage observed by a 3-D coherent Doppler lidar and in-situ aerosol/gas measurements by Takashima, Hisahiro, Hara, Keiichiro, Nishita-Hara, Chiharu, Fujiyoshi, Yasushi, Shiraishi, Koichi, Hayashi, Masahiko, Yoshino, Ayako, Takami, Akinori, Yamazaki, Akihiro

“…Local fronts, such as sea-breeze and land-breeze fronts, play an important role not only from a meteorological aspect but also for pollutant transport and…”
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Chemistry of sea-salt particles and inorganic halogen species in Antarctic regions: Compositional differences between coastal and inland stations by Hara, Keiichiro, Osada, Kazuo, Kido, Mizuka, Hayashi, Masahiko, Matsunaga, Katsuji, Iwasaka, Yasunobu, Yamanouchi, Takashi, Hashida, Gen, Fukatsu, Toru

“…Observations of aerosol constituents and acidic gases in the Antarctic area were carried out at Syowa (39.58°E, 69.00°S) in 1997 and 1998 and Dome Fuji…”
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Transboundary Secondary Organic Aerosol in Western Japan Indicated by the δ13C of Water-Soluble Organic Carbon and the m/z 44 Signal in Organic Aerosol Mass Spectra by Irei, Satoshi, Takami, Akinori, Hayashi, Masahiko, Sadanaga, Yasuhiro, Hara, Keiichiro, Kaneyasu, Naoki, Sato, Kei, Arakaki, Takemitsu, Hatakeyama, Shiro, Bandow, Hiroshi, Hikida, Toshihide, Shimono, Akio

“…The stable carbon isotope ratio (δ13C) of low-volatile water-soluble organic carbon (LV-WSOC) was measured in filter samples of total suspended particulate…”
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Monthly and Diurnal Variation of the Concentrations of Aerosol Surface Area in Fukuoka, Japan, Measured by Diffusion Charging Method by Kiriya, Miho, Okuda, Tomoaki, Yamazaki, Hana, Hatoya, Kazuki, Kaneyasu, Naoki, Uno, Itsushi, Nishita, Chiharu, Hara, Keiichiro, Hayashi, Masahiko, Funato, Koji, Inoue, Kozo, Yamamoto, Shigekazu, Yoshino, Ayako, Takami, Akinori

“…Observation of the ambient aerosol surface area concentrations is important to understand the aerosol toxicity because an increased surface area may be able to…”
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Factors Controlling the Variation of Aerosol Surface Area Concentrations Measured by a Diffusion Charger in Fukuoka, Japan by Okuda, Tomoaki, Yamazaki, Hana, Hatoya, Kazuki, Kaneyasu, Naoki, Yoshino, Ayako, Takami, Akinori, Funato, Koji, Inoue, Kozo, Nishita, Chiharu, Hara, Keiichiro, Hayashi, Masahiko

“…The surface area of ambient aerosols can be considered as an index of toxicity because an increased surface area may be able to act as a catalyst for specific…”
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Transported and Local Organic Aerosols over Fukuoka, Japan by Sato, Kei, Takami, Akinori, Irei, Satoshi, Miyoshi, Takao, Ogawa, Yoshimi, Yoshino, Ayako, Nakayama, Hiroyasu, Maeda, Megumi, Hayakeyama, Shiro, Hara, Keiichiro, Hayashi, Masahiko, Kaneyasu, Naoki

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Optical and chemical properties of marine boundary-layer aerosol around Japan determined from shipboard measurements in 2002 by Shiobara, Masataka, Hara, Keiichiro, Yabuki, Masanori, Kobayashi, Hiroshi

“…Shipboard measurements of the optical and chemical properties of marine boundary-layer aerosol were made around Japan over the period from 28 August to 25…”
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