The Grid-point Atmospheric Model of IAP LASG version 2 （GAMIL2） has been developed through upgrading the deep convection parameterization, cumulus cloud fraction and two-moment cloud microphys- ical scheme, as well ...The Grid-point Atmospheric Model of IAP LASG version 2 （GAMIL2） has been developed through upgrading the deep convection parameterization, cumulus cloud fraction and two-moment cloud microphys- ical scheme, as well as changing some of the large uncertain parameters. In this paper, its performance is evaluated, and the results suggest that there are some significant improvements in GAMIL2 compared to the previous version GAMIL1, for example, the components of the energy budget at the top of atmosphere （TOA） and surface; the geographic distribution of shortwave cloud radiative forcing （SWCF）; the ratio of stratiform versus total rainfall; the response of atmospheric circulation to the tropical ocean; and the east- ward propagation and spatiotemporal structures of the Madden Julian Oscillation （MJO）. Furthermore, the indirect aerosols effect （IAE） is -0.94 W m-2, within the range of 0 to -2 W m-2 given by the IPCC 4th Assessment Report （2007）. The influence of uncertain parameters on the MJO and radiation fluxes is also discussed.展开更多
基金supported by the CAS Strategic Priority Research Program(Grant No.XDA05110304)the National"973"Project(Grant No.2010CB951904)+2 种基金the China Meteorological Administration R&D Special Fund for Public Welfare(meteo-rology)(Grant No.GYHY201006014)the National"863"Project(Grant No.2010AA012304)the National Natural Science Foundation of China(Grant Nos.40923002 and 41005053)
文摘The Grid-point Atmospheric Model of IAP LASG version 2 （GAMIL2） has been developed through upgrading the deep convection parameterization, cumulus cloud fraction and two-moment cloud microphys- ical scheme, as well as changing some of the large uncertain parameters. In this paper, its performance is evaluated, and the results suggest that there are some significant improvements in GAMIL2 compared to the previous version GAMIL1, for example, the components of the energy budget at the top of atmosphere （TOA） and surface; the geographic distribution of shortwave cloud radiative forcing （SWCF）; the ratio of stratiform versus total rainfall; the response of atmospheric circulation to the tropical ocean; and the east- ward propagation and spatiotemporal structures of the Madden Julian Oscillation （MJO）. Furthermore, the indirect aerosols effect （IAE） is -0.94 W m-2, within the range of 0 to -2 W m-2 given by the IPCC 4th Assessment Report （2007）. The influence of uncertain parameters on the MJO and radiation fluxes is also discussed.
