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Evaluation of grid-point atmospheric model of IAP LASG version 2 (GAMIL2)

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Abstract

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 microphysical 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 eastward 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.

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Authors and Affiliations

  1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China

    Lijuan Li  (李立娟), Bin Wang  (王 斌), Li Dong  (董 理), Si Shen  (申 思), Ning Hu  (胡 宁), Wenqi Sun  (孙文奇), Yong Wang  (王 勇) & Ye Pu  (普 业)

  2. Ministry of Education Key Laboratory for Earth System Modeling, Center of Earth System Science, Tsinghua University, Beijing, 100084, China

    Bin Wang  (王 斌), Li Liu  (刘 利), Wenyu Huang  (黄文誉) & Guangwen Yang  (杨广文)

  3. Climate Center, Hebei Meteorological Administration, Shijiazhuang, 050021, China

    Xiangjun Shi  (史湘军)

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  1. Lijuan Li  (李立娟)
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Correspondence to Lijuan Li  (李立娟).

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Li, L., Wang, B., Dong, L. et al. Evaluation of grid-point atmospheric model of IAP LASG version 2 (GAMIL2). Adv. Atmos. Sci. 30, 855–867 (2013). https://doi.org/10.1007/s00376-013-2157-5

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  • DOI: https://doi.org/10.1007/s00376-013-2157-5

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