Search Results - "Yokouchi, Yoko"

Long-term high-frequency measurements of dibromomethane in the atmosphere at algae-rich and algae-poor coastal sites by Yokouchi, Yoko, Saito, Takuya, Mukai, Hitoshi

“…Dibromomethane (CH 2 Br 2 ), a natural stratospheric ozone depleting substance, is mostly emitted from the ocean, but the relative importance of coastal (or…”
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Urban photochemistry in central Tokyo: 1. Observed and modeled OH and HO2 radical concentrations during the winter and summer of 2004 by Kanaya, Yugo, Cao, Renqiu, Akimoto, Hajime, Fukuda, Masato, Komazaki, Yuichi, Yokouchi, Yoko, Koike, Makoto, Tanimoto, Hiroshi, Takegawa, Nobuyuki, Kondo, Yutaka

“…We used laser‐induced fluorescence to measure the concentrations of OH and HO2 radicals in central Tokyo during two intensive campaigns (IMPACT IV and IMPACT…”
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Stable carbon isotope ratio of methyl chloride emitted from glasshouse-grown tropical plants and its implication for the global methyl chloride budget by Saito, Takuya, Yokouchi, Yoko

“…Stable carbon isotope ratios of methyl chloride (CH3Cl) were measured in foliar emissions from 14 species of tropical plants growing in a glasshouse. The…”
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Dichloromethane in the Indian Ocean: Evidence for in-situ production in seawater by Ooki, Atsushi, Yokouchi, Yoko

“…We measured partial pressures of CH 2Cl 2 (dichloromethane) and CCl 3F (CFC-11) in air and surface seawater of the Indian and Southern Oceans from November…”
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Reconciling reported and unreported HFC emissions with atmospheric observations by Lunt, Mark F., Rigby, Matthew, Ganesan, Anita L., Manning, Alistair J., Prinn, Ronald G., O’Doherty, Simon, Mühle, Jens, Harth, Christina M., Salameh, Peter K., Arnold, Tim, Weiss, Ray F., Saito, Takuya, Yokouchi, Yoko, Krummel, Paul B., Steele, L. Paul, Fraser, Paul J., Li, Shanlan, Park, Sunyoung, Reimann, Stefan, Vollmer, Martin K., Lunder, Chris, Hermansen, Ove, Schmidbauer, Norbert, Maione, Michela, Arduini, Jgor, Young, Dickon, Simmonds, Peter G.

“…We infer global and regional emissions of five of the most abundant hydrofluorocarbons (HFCs) using atmospheric measurements from the Advanced Global…”
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Bidirectional exchange of methyl halides between tropical plants and the atmosphere by Saito, Takuya, Yokouchi, Yoko, Phillip, Elizabeth, Okuda, Toshinori

“…Using a stable isotope tracer technique, we studied the exchange of methyl chloride (CH3Cl) and methyl bromide (CH3Br) between plants and the atmosphere in a…”
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A global-scale map of isoprene and volatile organic iodine in surface seawater of the Arctic, Northwest Pacific, Indian, and Southern Oceans by Ooki, Atsushi, Nomura, Daiki, Nishino, Shigeto, Kikuchi, Takashi, Yokouchi, Yoko

“…Isoprene (C5H8) and three volatile organic iodine compounds (VOIs: CH3I, C2H5I, and CH2ClI) in surface seawater were measured in the western Arctic, Northwest…”
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Diurnal and seasonal variations of iodocarbons (CH2ClI, CH2I2, CH3I, and C2H5I) in the marine atmosphere by Yokouchi, Yoko, Saito, Takuya, Ooki, Atsushi, Mukai, Hitoshi

“…Four iodocarbons, chloroiodomethane (CH2ClI), diiodomethane (CH2I2), methyl iodide (CH3I), and ethyl iodide (C2H5I), were measured with an automated…”
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Development of a Silicone Membrane Tube Equilibrator for Measuring Partial Pressures of Volatile Organic Compounds in Natural Water by Ooki, Atsushi, Yokouchi, Yoko

“…Methods for determining volatile organic compounds (VOCs) in water and air are required so that the VOCs’ fluxes in water environments can be estimated. We…”
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Photochemical age of air pollutants, ozone, and secondary organic aerosol in transboundary air observed on Fukue Island, Nagasaki, Japan by Irei, Satoshi, Takami, Akinori, Sadanaga, Yasuhiro, Nozoe, Susumu, Yonemura, Seiichiro, Bandow, Hiroshi, Yokouchi, Yoko

“…To better understand the secondary air pollution in transboundary air over westernmost Japan, ground-based field measurements of the chemical composition of…”
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Distribution of natural halocarbons in marine boundary air over the Arctic Ocean by Yokouchi, Yoko, Inoue, Jun, Toom-Sauntry, Desiree

“…Ongoing environmental changes in the Arctic will affect the exchange of natural volatile organic compounds between the atmosphere and the Arctic Ocean. Among…”
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Equilibrator Inlet-Proton Transfer Reaction-Mass Spectrometry (EI-PTR-MS) for Sensitive, High-Resolution Measurement of Dimethyl Sulfide Dissolved in Seawater by Kameyama, Sohiko, Tanimoto, Hiroshi, Inomata, Satoshi, Tsunogai, Urumu, Ooki, Atsushi, Yokouchi, Yoko, Takeda, Shigenobu, Obata, Hajime, Uematsu, Mitsuo

“…We developed an equilibrator inlet-proton transfer reaction-mass spectrometry (EI-PTR-MS) method for fast detection of dimethyl sulfide (DMS) dissolved in…”
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Long-term variation of atmospheric methyl iodide and its link to global environmental change by Yokouchi, Yoko, Nojiri, Yukihiro, Toom-Sauntry, Desiree, Fraser, Paul, Inuzuka, Yoko, Tanimoto, Hiroshi, Nara, Hideki, Murakami, Ryuichi, Mukai, Hitoshi

“…It has been suggested that the emissions of volatile organic compounds (VOCs) from the ocean could be affected by global warming, with feedback effects on the…”
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Chemistry of OH and HO2 radicals observed at Rishiri Island, Japan, in September 2003: Missing daytime sink of HO2 and positive nighttime correlations with monoterpenes by Kanaya, Yugo, Cao, Renqiu, Kato, Shungo, Miyakawa, Yuko, Kajii, Yoshizumi, Tanimoto, Hiroshi, Yokouchi, Yoko, Mochida, Michihiro, Kawamura, Kimitaka, Akimoto, Hajime

“…We used laser‐induced fluorescence to measure concentrations of OH and HO2 at Rishiri Island, Japan, during September 2003. The average maximum daytime…”
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Diurnal variation in methyl halide emission rates from tropical ferns by Saito, Takuya, Yokouchi, Yoko

“…We measured foliar emission rates of methyl chloride (CH 3Cl) and methyl bromide (CH 3Br) from tropical ferns. The diurnal variation in methyl halide emission…”
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Urban photochemistry in central Tokyo: 2. Rates and regimes of oxidant (O3 + NO2) production by Kanaya, Yugo, Fukuda, Masato, Akimoto, Hajime, Takegawa, Nobuyuki, Komazaki, Yuichi, Yokouchi, Yoko, Koike, Makoto, Kondo, Yutaka

“…Net photochemical production rates of oxidant (Ox = O3 + NO2), F‐D(Ox), were determined in Tokyo during the winter and summer of 2004 using observed and…”
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Methyl chloride and isoprene emissions from tropical rain forest in Southeast Asia by Saito, Takuya, Yokouchi, Yoko, Kosugi, Yoshiko, Tani, Makoto, Philip, Elizabeth, Okuda, Toshinori

“…Methyl chloride (CH3Cl) fluxes were investigated at leaf and forest‐canopy scales in tropical forests in Malaysia. Screening of CH3Cl‐emitting species showed…”
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Global distribution and seasonal concentration change of methyl iodide in the atmosphere by Yokouchi, Yoko, Osada, Kazuo, Wada, Makoto, Hasebe, Fumio, Agama, Mario, Murakami, Ryuichi, Mukai, Hitoshi, Nojiri, Yukihiro, Inuzuka, Yoko, Toom-Sauntry, Desiree, Fraser, Paul

“…We investigated seasonal variations in atmospheric CH3I at high, middle, and low latitudes in both hemispheres: at Alert (82.5°N, 62.5°W), over the northern…”
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Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications by Kanaya, Yugo, Tanimoto, Hiroshi, Yokouchi, Yoko, Taketani, Fumikazu, Komazaki, Yuichi, Irie, Hitoshi, Takashima, Hisahiro, Pan, Xiaole, Nozoe, Susumu, Inomata, Satoshi

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Emission of methyl chloride from a fern growing in subtropical, temperate, and cool-temperate climate zones by Yokouchi, Yoko, Takenaka, Akio, Miyazaki, Yuzo, Kawamura, Kimitaka, Hiura, Tsutom

“…Tropical and subtropical forests are believed to be the largest source of methyl chloride (CH3Cl), which is a natural stratospheric ozone destroyer. However,…”
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