Chemical modelling with CHASER and WRF/Chem in Japan

Abstract

In this paper results of studies with WRF/Chem and CHASER models are presented. The CHemical Atmospheric general circulation model for Study of Atmospheric Environment and Radiative forcing (CHASER) is a global chemical transport model (cf. Sudo et al. J Geophys Res 107(D21):4339, 2002a; Sudo et al. J Geophys Res 107(D21), 4586, 2002b; Takigawa et al., J Geophys Res 110, 2005). The gaseous and aerosol chemistry module is implemented in the CHASER in an on-line mode. CHASER is based on CCSR/FRCGC/NIES AGCM 5.7b, and the meteorology and radiation can be simulated in CHASER itself. The radiative feedback through the distribution of chemical species is taken into account. Daily forecasts have been available on internet since 1 January 2002. This forecasting system was developed for the use of daily flight planning for the Pacific Exploration of Asian Continental Emission (PEACE)-A (January 2002) and PEACE-B (April-May 2002) campaigns. A regional-scale chemical weather forecasting system based on WRF/Chem has been also developed. The lateral boundary for chemical species is taken from the 3-hourly output of CHASER. The modelled surface ozone was compared with the ground-based observations. © 2011 Springer Berlin Heidelberg.