研究者詳細 - 須藤　健悟

論文 - 須藤　健悟

分割表示 174 件中 121 - 140 件目／全件表示 >>

Global NOx emission estimates derived from an assimilation of OMI tropospheric NO2 columns 査読有り

K. Miyazaki, H. J. Eskes, and K. Sudo

Atmos. Chem. Phys. 12 巻頁： 2263-2288 2012年

記述言語：英語掲載種別：研究論文（学術雑誌）

A data assimilation system has been developed to estimate global nitrogen oxides (NOx) emissions using OMI tropospheric NO2 columns (DOMINO product) and a global chemical transport model (CTM), the Chemical Atmospheric GCM for Study of Atmospheric Environment and Radiative Forcing (CHASER). The data assimilation system, based on an ensemble Kalman filter approach, was applied to optimize daily NOx emissions with a horizontal resolution of 2.8° during the years 2005 and 2006. The background error covariance estimated from the ensemble CTM forecasts explicitly represents non-direct relationships between the emissions and tropospheric columns caused by atmospheric transport and chemical processes. In comparison to the a priori emissions based on bottom-up inventories, the optimized emissions were higher over eastern China, the eastern United States, southern Africa, and central-western Europe, suggesting that the anthropogenic emissions are mostly underestimated in the inventories. In addition, the seasonality of the estimated emissions differed from that of the a priori emission over several biomass burning regions, with a large increase over Southeast Asia in April and over South America in October. The data assimilation results were validated against independent data: SCIAMACHY tropospheric NO2 columns and vertical NO2 profiles obtained from aircraft and lidar measurements. The emission correction greatly improved the agreement between the simulated and observed NO2 fields; this implies that the data assimilation system efficiently derives NOx emissions from concentration observations. We also demonstrated that biases in the satellite retrieval and model settings used in the data assimilation largely affect the magnitude of estimated emissions. These dependences should be carefully considered for better understanding NOx sources from top-down approaches.

DOI： 10.5194/acp-12-2263-2012

Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model 査読有り

Watanabe S., Takemura T., Sudo K., Yokohata T., Kawase H.

ATMOSPHERIC CHEMISTRY AND PHYSICS 12 巻 ( 11 ) 頁： 5249-5257 2012年

Global air quality and climate 査読有り

Fiore Arlene M., Naik Vaishali, Spracklen Dominick V., Steiner Allison, Unger Nadine, Prather Michael, Bergmann Dan, Cameron-Smith Philip J., Cionni Irene, Collins William J., Dalsoren Stig, Eyring Veronika, Folberth Gerd A., Ginoux Paul, Horowitz Larry W., Josse Beatrice, Lamarque Jean-Francois, MacKenzie Ian A., Nagashima Tatsuya, O'Connor Fiona M., Righi Mattia, Rumbold Steven T., Shindell Drew T., Skeie Ragnhild B., Sudo Kengo, Szopa Sophie, Takemura Toshihiko, Zeng Guang

CHEMICAL SOCIETY REVIEWS 41 巻 ( 19 ) 頁： 6663-6683 2012年

Simultaneous assimilation of satellite NO2, O-3, CO, and HNO3 data for the analysis of tropospheric chemical composition and emissions 査読有り

Miyazaki K., Eskes H. J., Sudo K., Takigawa M., van Weele M., Boersma K. F.

ATMOSPHERIC CHEMISTRY AND PHYSICS 12 巻 ( 20 ) 頁： 9545-9579 2012年

A study of uncertainties in the sulfate distribution and its radiative forcing associated with sulfur chemistry in a global aerosol model, 査読有り

Goto, D., Nakajima, T., Takemura, T., and Sudo, K.

Atmospheric Chemistry and Physics 11 巻頁： 10889-10910 2011年11月

Influences of the variation in inflow to East Asia on surface ozone over Japan during 1996-2005 査読有り

Chatani, S. and K. Sudo

Atmospheric Chemistry and Physics 11 巻頁： 8745-8758 2011年11月

Future changes in tropospheric ozone under Representative Concentration Pathways (RCPs) 査読有り

Kawase, H., T. Nagashima, K. Sudo, and T. Nozawa

Geophys. Res. Lett. 38 巻 ( L05801 ) 2011年11月

Future projections of surface UV-B in a changing climate 査読有り

Watanabe, S., K. Sudo, T. Nagashima, T. Takemura, H. Kawase, and T. Nozawa

J. Geophys. Res. 116 巻 ( D16118 ) 2011年11月

The impact of soil uptake on the global distribution of molecular hydrogen: chemical transport model simulation 査読有り

Yashiro, H., K. Sudo, Yonemura, S., and Takigawa, M.

Atmospheric Chemistry and Physics 11 巻頁： 6701-6719 2011年11月

Future projections of surface UV-B in a changing climate 査読有り

Watanabe S., Sudo K., Nagashima T., Takemura T., Kawase H., Nozawa T.

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 116 巻 2011年8月

Future changes in tropospheric ozone under Representative Concentration Pathways (RCPs) 査読有り

Kawase Hiroaki, Nagashima Tatsuya, Sudo Kengo, Nozawa Toru

GEOPHYSICAL RESEARCH LETTERS 38 巻 2011年3月

MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments, 査読有り

Watanabe, S., Hajima, T., Sudo,K., Nagashima, T., Takemura, T., Okajima, H., Nozawa, T., Kawase, H., Abe, M., Yokohata, T., Ise, T., Sato, H., Kato, E., Takata, K., Emori, S., and Kawamiya, M.:

Geosci. Model Dev 4 巻 ( 2256 ) 頁： 845-872 2011年

Evaluation of methane emissions from West Siberian wetlands based on inverse modeling 査読有り

H-S. Kim, S. Maksyutov, M. V. Glagolev, T. Machida, P. K. Patra, K. Sudo and G. Inoue

Environ. Res. Lett. 6 巻 ( 035201 ) 2011年

A study of uncertainties in the sulfate distribution and its radiative forcing associated with sulfur chemistry in a global aerosol model 査読有り

Goto D., Nakajima T., Takemura T., Sudo K.

ATMOSPHERIC CHEMISTRY AND PHYSICS 11 巻 ( 21 ) 頁： 10889-10910 2011年

Influences of the variation in inflow to East Asia on surface ozone over Japan during 1996-2005 査読有り

Chatani S., Sudo K.

ATMOSPHERIC CHEMISTRY AND PHYSICS 11 巻 ( 16 ) 頁： 8745-8758 2011年

Evaluation of methane emissions from West Siberian wetlands based on inverse modeling 査読有り

Kim H-S, Maksyutov S., Glagolev M. V., Machida T., Patra P. K., Sudo K., Inoue G.

ENVIRONMENTAL RESEARCH LETTERS 6 巻 ( 3 ) 2011年

MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments 査読有り

Watanabe S., Hajima T., Sudo K., Nagashima T., Takemura T., Okajima H., Nozawa T., Kawase H., Abe M., Yokohata T., Ise T., Sato H., Kato E., Takata K., Emori S., Kawamiya M.

GEOSCIENTIFIC MODEL DEVELOPMENT 4 巻 ( 4 ) 頁： 845-872 2011年

The impact of soil uptake on the global distribution of molecular hydrogen: chemical transport model simulation 査読有り

Yashiro H., Sudo K., Yonemura S., Takigawa M.

ATMOSPHERIC CHEMISTRY AND PHYSICS 11 巻 ( 13 ) 頁： 6701-6719 2011年

Influences of the variation in inflow to East Asia on surface ozone over Japan during 1996-2005 査読有り

S.Chatani and K.Sudo

Atmospheric Chemistry and Physics Discussions 10 巻頁： 30823-30856 2010年12月

The relative importance of various source regions on East Asiansurface ozone 査読有り

T.Nagashima, T.Ohara, K.Sudo, H.Akimoto

Atmospheric Chemistry and Physics 10 巻頁： 11305-11322 2010年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

We estimated the source-receptor relationship
for surface O3 in East Asia during the early 2000s using
a method that tags O3 tracers according to their region of
chemical production (tagged tracer method) with a global
chemical transport model. The estimation demonstrated the
importance of intracontinental transport of O3 inside East
Asia as well as of the transport of O3 from distant source
regions.

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