Japan Geoscience Union Meeting 2018

Presentation information

[EJ] Oral

A (Atmospheric and Hydrospheric Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS06] Atmospheric Chemistry

Thu. May 24, 2018 3:30 PM - 5:00 PM A05 (Tokyo Bay Makuhari Hall)

convener:Yoko Iwamoto(Graduate School of Biosphere Science, Hiroshima University), Tomoki Nakayama(Graduate School of Fisheries and Environmental Sciences, Nagasaki University), Sakae Toyoda(東京工業大学物質理工学院, 共同), Nawo Eguchi(Kyushu University), Chairperson:Takigawa Masayuki(Japan Agency for Marine-Earth Science and Technology)

4:00 PM - 4:15 PM

[AAS06-24] NHM-Chem, the Japan Meteorological Agency's regional meteorology - chemistry model: toward the consistent predictions of chemical, physical, and optical properties of aerosols and their regional budget

*Mizuo Kajino1,2, Makoto Deushi3,1, Tsuyoshi Thomas Sekiyama1, Takashi Maki1, Naga Oshima1, Taichu Y Tanaka1, Akihiro Hashimoto1, Joseph Ching1, Keiya Yumimoto4,1, Masaaki Ikegami3, Akane Kamada3, Yayoi Inomata5,1, Shin-ichiro Shima6, Akinori Takami7, Atsushi Shimizu7, Shiro Hatakayama8, Hitoshi Irie9, Kouji Adachi1, Yasuhito Igarashi1, Hiromasa Ueda10, Masao Mikami11 (1.Meteorological Research Institute, 2.University of Tsukuba, 3.Japan Meteorological Agency, 4.Kyushu University, 5.Kanazawa University, 6.University of Hyogo, 7.National Institute for Environmental Studies, 8.Center for Environmental Science in Saitama, 9.Chiba University, 10.Kyoto University, 11.Japan Meteorological Business Support Center)

Keywords:Air quality, Atmospheric chemistry, Aerosol microphysics, Aerosol optical property, Cloud condensation nuclei

A regional-scale meteorology - chemistry model (NHM-Chem) has been developed for the consistent predictions of chemical, physical, and optical properties of aerosols. Those properties are essentially important for the accurate assessment of air quality and health hazard, contamination of land ecosystems, and regional climate changes due to aerosol-cloud-radiation interaction processes. The consistency in regional budget, such as emission, transport, transformation, and deposition are also evaluated and discussed. Lack in the consistent evaluations might mislead interpretations of discrepancy between the model and observation. The improvement of model based on the misled interpretations will even alienate the model result from reality. A variety of aerosol category representations is a unique feature of NHM-Chem. Currently, three options are available: 5-category (Aitken, accumulation internally mixed with soot, accumulation not mixed with soot, sea-salt, and dust), 3-category (Aitken, accumulation, and coarse), and a bulk equilibrium chemistry (submicron, sea-salt, and dust). The three are supposed to be suitable for the predictions of regional climate, air quality, and operational forecast, respectively. The model performance in terms of the consistent prediction and the sensitivity of model performance to the selection of aerosol options are presented in the presentation.