Search Results - "TAKIGAWA, Masayuki"

PM2.5 diminution and haze events over Delhi during the COVID-19 lockdown period: an interplay between the baseline pollution and meteorology by Dhaka, Surendra K., Chetna, Kumar, Vinay, Panwar, Vivek, Dimri, A. P., Singh, Narendra, Patra, Prabir K., Matsumi, Yutaka, Takigawa, Masayuki, Nakayama, Tomoki, Yamaji, Kazuyo, Kajino, Mizuo, Misra, Prakhar, Hayashida, Sachiko

“…Delhi, a tropical Indian megacity, experiences one of the most severe air pollution in the world, linked with diverse anthropogenic and biomass burning…”
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Nitrogen oxides concentration and emission change detection during COVID-19 restrictions in North India by Misra, Prakhar, Takigawa, Masayuki, Khatri, Pradeep, Dhaka, Surendra K., Dimri, A. P., Yamaji, Kazuyo, Kajino, Mizuo, Takeuchi, Wataru, Imasu, Ryoichi, Nitta, Kaho, Patra, Prabir K., Hayashida, Sachiko

“…COVID-19 related restrictions lowered particulate matter and trace gas concentrations across cities around the world, providing a natural opportunity to study…”
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Emissions from the Oil and Gas Sectors, Coal Mining and Ruminant Farming Drive Methane Growth over the Past Three Decades by CHANDRA, Naveen, PATRA, Prabir K., BISHT, Jagat S. H., ITO, Akihiko, UMEZAWA, Taku, SAIGUSA, Nobuko, MORIMOTO, Shinji, AOKI, Shuji, JANSSENS-MAENHOUT, Greet, FUJITA, Ryo, TAKIGAWA, Masayuki, WATANABE, Shingo, SAITOH, Naoko, CANADELL, Josep G.

“…Methane (CH4) is an important greenhouse gas and plays a significant role in tropospheric and stratospheric chemistry. Despite the relevance of methane (CH4)…”
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FLEXPART v10.1 simulation of source contributions to Arctic black carbon by Zhu, Chunmao, Kanaya, Yugo, Takigawa, Masayuki, Ikeda, Kohei, Tanimoto, Hiroshi, Taketani, Fumikazu, Miyakawa, Takuma, Kobayashi, Hideki, Pisso, Ignacio

“…The Arctic environment is undergoing rapid changes such as faster warming than the global average and exceptional melting of glaciers in Greenland. Black…”
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Updated tropospheric chemistry reanalysis and emission estimates, TCR-2, for 2005–2018 by Miyazaki, Kazuyuki, Bowman, Kevin, Sekiya, Takashi, Eskes, Henk, Boersma, Folkert, Worden, Helen, Livesey, Nathaniel, Payne, Vivienne H, Sudo, Kengo, Kanaya, Yugo, Takigawa, Masayuki, Ogochi, Koji

“…This study presents the results from the Tropospheric Chemistry Reanalysis version 2 (TCR-2) for the period 2005–2018 at 1.1∘ horizontal resolution obtained…”
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Investigation of the wet removal rate of black carbon in East Asia: validation of a below- and in-cloud wet removal scheme in FLEXible PARTicle (FLEXPART) model v10.4 by Choi, Yongjoo, Kanaya, Yugo, Takigawa, Masayuki, Zhu, Chunmao, Park, Seung-Myung, Matsuki, Atsushi, Sadanaga, Yasuhiro, Kim, Sang-Woo, Pan, Xiaole, Pisso, Ignacio

“…Understanding the global distribution of atmospheric black carbon (BC) is essential for unveiling its climatic effect. However, there are still large…”
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Identifying key factors influencing model performance on ground-level ozone over urban areas in Japan through model inter-comparisons by Chatani, Satoru, Yamaji, Kazuyo, Itahashi, Syuichi, Saito, Masahiko, Takigawa, Masayuki, Morikawa, Tazuko, Kanda, Isao, Miya, Yukako, Komatsu, Hiroaki, Sakurai, Tatsuya, Morino, Yu, Nagashima, Tatsuya, Kitayama, Kyo, Shimadera, Hikari, Uranishi, Katsushige, Fujiwara, Yuzuru, Shintani, Soma, Hayami, Hiroshi

“…Ozone is one of remaining air quality issues in Japan. Effective strategies are required to reduce ozone at the ground level. Regional chemical transport…”
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Very high particulate pollution over northwest India captured by a high-density in situ sensor network by Singh, Tanbir, Matsumi, Yutaka, Nakayama, Tomoki, Hayashida, Sachiko, Patra, Prabir K., Yasutomi, Natsuko, Kajino, Mizuo, Yamaji, Kazuyo, Khatri, Pradeep, Takigawa, Masayuki, Araki, Hikaru, Kurogi, Yuki, Kuji, Makoto, Muramatsu, Kanako, Imasu, Ryoichi, Ananda, Anamika, Arbain, Ardhi A., Ravindra, Khaiwal, Bhardwaj, Sanjeev, Kumar, Sahil, Mor, Sahil, Dhaka, Surendra K., Dimri, A. P., Sharma, Aka, Singh, Narendra, Bhatti, Manpreet S., Yadav, Rekha, Vatta, Kamal, Mor, Suman

“…Exposure to particulate matter less than 2.5 µm in diameter (PM 2.5 ) is a cause of concern in cities and major emission regions of northern India. An…”
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Improved Chemical Tracer Simulation by MIROC4.0-based Atmospheric Chemistry-Transport Model (MIROC4-ACTM) by Patra, Prabir K., Takigawa, Masayuki, Watanabe, Shingo, Chandra, Naveen, Ishijima, Kentaro, Yamashita, Yousuke

“…The accuracy of chemical tracer simulations by atmospheric general circulation model (AGCM)-based chemistry-transport models (ACTMs) depends on the quality of…”
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Dispersion of artificial caesium-134 and -137 in the western North Pacific one month after the Fukushima accident by HONDA, MAKIO C., AONO, TATSUO, AOYAMA, MICHIO, HAMAJIMA, YASUNORI, KAWAKAMI, HAJIME, KITAMURA, MINORU, MASUMOTO, YUKIO, MIYAZAWA, YASUMASA, TAKIGAWA, MASAYUKI, SAINO, TOSHIRO

“…In March 2011, an accident at the Fukushima Daiichi nuclear power plant (FNPP-AC) was caused by the Tohoku earthquake and tsunami. Here we show the…”
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A model intercomparison of atmospheric 137Cs concentrations from the Fukushima Daiichi Nuclear Power Plant accident, phase III: Simulation with an identical source term and meteorological field at 1-km resolution by Sato, Yousuke, Sekiyama, Tsuyoshi Thomas, Fang, Sheng, Kajino, Mizuo, Quérel, Arnaud, Quélo, Denis, Kondo, Hiroaki, Terada, Hiroaki, Kadowaki, Masanao, Takigawa, Masayuki, Morino, Yu, Uchida, Junya, Goto, Daisuke, Yamazawa, Hiromi

“…The third model intercomparison project (MIP) for investigating the atmospheric behavior of atmospheric caesium-137 (137Cs) emitted from Fukushima Daiichi…”
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Measurements of Aerosol Particle Size Distributions and INPs Over the Southern Ocean in the Late Austral Summer of 2017 on Board the R/V Mirai: Importance of the Marine Boundary Layer Structure by Miyakawa, Takuma, Taketani, Fumikazu, Tobo, Yutaka, Matsumoto, Kazuhiko, Yoshizue, Momoka, Takigawa, Masayuki, Kanaya, Yugo

“…The Southern Ocean (SO) is a unique region with rich ecosystems and minimal anthropogenic and terrestrial natural impacts especially during austral summer. We…”
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Intercomparison of numerical atmospheric dispersion prediction models for emergency response to emissions of radionuclides with limited source information in the Fukushima Dai-ichi nuclear power plant accident by Iwasaki, Toshiki, Sekiyama, Tsuyoshi Thomas, Nakajima, Teruyuki, Watanabe, Akira, Suzuki, Yasushi, Kondo, Hiroaki, Morino, Yu, Terada, Hiroaki, Nagai, Haruyasu, Takigawa, Masayuki, Yamazawa, Hiromi, Quélo, Denis, Mathieu, Anne

“…The utilization of numerical atmospheric dispersion prediction (NDP) models for assisting the emergency response to emission of radionuclides has been…”
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Assessing Lagrangian inverse modelling of urban anthropogenic CO2 fluxes using in situ aircraft and ground-based measurements in the Tokyo area by Pisso, Ignacio, Patra, Prabir, Takigawa, Masayuki, Machida, Toshinobu, Matsueda, Hidekazu, Sawa, Yousuke

“…Background In order to use in situ measurements to constrain urban anthropogenic emissions of carbon dioxide (CO 2 ), we use a Lagrangian methodology based on…”
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Global high-resolution simulations of tropospheric nitrogen dioxide using CHASER V4.0 by Sekiya, Takashi, Miyazaki, Kazuyuki, Ogochi, Koji, Sudo, Kengo, Takigawa, Masayuki

“…We evaluate global tropospheric nitrogen dioxide (NO2) simulations using the CHASER V4.0 global chemical transport model (CTM) at horizontal resolutions of…”
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Impacts of Horizontal Resolution on Global Data Assimilation of Satellite Measurements for Tropospheric Chemistry Analysis by Sekiya, Takashi, Miyazaki, Kazuyuki, Ogochi, Koji, Sudo, Kengo, Takigawa, Masayuki, Eskes, Henk, Boersma, K. Folkert

“…We present the results from a global 0.56°‐resolution chemical data assimilation that integrates satellite observations of ozone, NO2, CO, HNO3, and SO2 from…”
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Can Delhi's Pollution be Affected by Crop Fires in the Punjab Region? by Takigawa, Masayuki, Patra, Prabir K., Matsumi, Yutaka, Dhaka, Surendra K., Nakayama, Tomoki, Yamaji, Kazuyo, Kajino, Mizuo, Hayashida, Sachiko

“…The severe air pollution events continue to occur every year during late October and early November in Delhi, forcing air/land traffic disruptions and anxiety…”
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Global-scale transport of carbon dioxide in the troposphere by Miyazaki, Kazuyuki, Patra, Prabir K., Takigawa, Masayuki, Iwasaki, Toshiki, Nakazawa, Takakiyo

“…An atmospheric transport model was used to examine the roles of variously scaled atmospheric transport processes (Lagrangian mean motions, large‐scale eddies,…”
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Seasonal Variations of SF6, CO2, CH4, and N2O in the UT/LS Region due to Emissions, Transport, and Chemistry by Bisht, Jagat S. H., Machida, Toshinobu, Chandra, Naveen, Tsuboi, Kazuhiro, Patra, Prabir K., Umezawa, Taku, Niwa, Yosuke, Sawa, Yousuke, Morimoto, Shinji, Nakazawa, Takakiyo, Saitoh, Naoko, Takigawa, Masayuki

“…Distributions of trace gases in the atmosphere provide key information on the transport and chemical properties of the Earth's environment. In this study, we…”
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Model Inter-Comparison for PM2.5 Components over urban Areas in Japan in the J-STREAM Framework by Yamaji, Kazuyo, Chatani, Satoru, Itahashi, Syuichi, Saito, Masahiko, Takigawa, Masayuki, Morikawa, Tazuko, Kanda, Isao, Miya, Yukako, Komatsu, Hiroaki, Sakurai, Tatsuya, Morino, Yu, Kitayama, Kyo, Nagashima, Tatsuya, Shimadera, Hikari, Uranishi, Katsushige, Fujiwara, Yuzuru, Hashimoto, Tomoaki, Sudo, Kengo, Misaki, Takeshi, Hayami, Hiroshi

“…A model inter-comparison of secondary pollutant simulations over urban areas in Japan, the first phase of Japan’s study for reference air quality modeling…”
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