CMAS workshop021023 Application of CMAQ with RAMS to

CMAS workshop　02/10/23 Application of CMAQ with RAMS to air quality in the Osaka area in Japan ＊Seiji Sugata, Shinji Wakamatsu (NIES) Toshimasa Ohara (Shizuoka Univ. ) Itsushi Uno (Kyushu Univ. ) (*e-mail: sugatas@nies. go. jp) Two main contents ・Use of RAMS for CMAQ ・Application to the Osaka area in Japan (preliminary result)

Difference of MM 5 and RAMS MM 5 Technically points Grid system Arakawa-E Map projection Lambert Vertical coordinate sigma-p RAMS Arakawa-C Polar-stereo sigma-z Scientific Hard to say in one sentence Each strong and weak points Users Many Most popular regional met. models License Free Necessary

A wide choice of meteorological models for input to CMAQ →　increasing flexibility of CMAQ application CMAQ-RAMS interface history －　 Original idea by Byun and Uno 1999 Interface for CMAQ 1999 and RAMS 3 b 　　　developed by Byun and Sugata available 　 2000 updated for RAMS 4. 3 (↓　Sugata) 2002 updating for CMAQ 2001 　　　　　　 preparing updating for CMAQ 2002 (MCIP 2)

Data flow in the interface postprocessing routine REVU (RAMS Evaluation and Visualization Utility) Modified dumpout. f Main routines of RAMS (version 4. 3) Met. data in GTOOL format RAMS 2 IOAPI Met. data in I/O API format modified MCIP CMAQ CTM

Air quality observation campaign in Osaka Aircraft Tokyo Osaka Surface Osaka Bay One month for March, 2001 surface 0 m, 60 m concentrations of SO 2, NOx, PMs, etc. and high volume sampling for aerosols aircraft 19, 20, 21, 23 March, 2001 concentrations of SO 2, NOx, PMs, etc. and high volume sampling for aerosols

Application of CMAQ/RAMS to the OSAKA area Calculation Period: Mar. 15 -24, 2001 (Aircraft measurement Mar. 19, 20, 21, 23) Resolution: 5 km mesh (Polarstereo) 21 layers from 25 m up to 19 km, interval starts from 50 m Domain: Greater Osaka area (next slide) no-nesting RAMS 300 km square CMAQ 200 km square Emission 1998 data by the Ministry of the environment (10 km mesh) Models RAMS 4. 3 assimilation by ECMWF 0. 5 degree mesh 4 times per day CMAQ 1999 ver.

Domain for CMAQ (200 km square) Domain for RAMS (300 km square) Met. data Nudging by ECMWF one hour at edges two days inside

Emissions (NO and SO 2)

CMAQ vs. Obs. (Osaka) ○　62 m obs. ● surface obs. Solid lines: CMAQ NO 2 O 3 NOx SO 2

NO 2 (time series and scatter diagrams)

NOx (time series and scatter diagrams)

NO (time series and scatter diagrams)

O 3 (time series and scatter diagrams)

SO 2 (time series and scatter diagrams)

Vertical profile of concentration of SO 2 along the flight path (Red: CMAQ)

Comparison of wind velocity and direction between RAMS and observation at five observational sites, Osaka and neighboring four sites.

Wind velocity and direction RAMS vs. Obs. (Black: RAMS Red: Observation) Direction Velocity Osaka Kobe (west of Osaka)

Wind velocity and direction (RAMS vs. Obs. ) Black: RAMS Red: Obs. Velocity Toyonaka (north of Osaka) Sakai (south of Osaka) Direction

Scatter diagram for wind velocity at Osaka Obs. RAMS

Summary of correlation coefficients Gas concentrations (Obs. -CMAQ) NO 2 Ox (Day/Night) 0. 33 0. 16 / 0. 34 Met. Field (Obs. -RAMS) Osaka SO 2 0. 51 0. 36 / 0. 11 Kobe 0. 13　　　　　 0. 16 / 0. 05 Toyonaka Sakai Ikomayama Velocity 0. 61 （Day/Night) 0. 68 / 0. 17 0. 37 0. 51 / 0. 14 0. 61 0. 53　　　　　　 0. 59 0. 61 / 0. 28 0. 64 / 0. 13 0. 61 / 0. 44 Direction 0. 37 （Day/Night) 0. 33 / 0. 38 0. 33 0. 45 / 0. 26 0. 08 0. 60 0. 11 / 0. 12 0. 50 / 0. 54 →　concentrations <similar coefficients> directions 0. 49 0. 52 / 0. 46

Summary - Developing MCIP-RAMS interfaces. - Simulated air quality in the Osaka area in March 2001 using CMAQ and RAMS - Compared gas concentrations between CMAQ and observations (surface and aircraft). - Compared wind velocity and direction between RAMS and observations. - Simulations reproduce essentially orders of observational concentrations but still show quantitative disagreement. - RAMS wind fields strong wind for night calm air better in velocity and worse in direction

Next -Development of the interface for MCIP 2 -Ready for distribution for those who are interested in -Interested in learning MM 5 -To get more realistic RAMS results -One or two more nesting domains 　 to consider long-range transport -Others