An Introduction to the Coupled Model FGOALS1.1-s and Its Performance in East Asia |
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| Authors: | BAO Qing WU Guoxiong LIU Yimin YANG Jing WANG Zaizhi and ZHOU Tianjun |
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| Institution: | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,ESPRE, Beijing Normal University, Beijing 100875,Beijing Climate Center, China Meteorological Administration, Beijing 100081,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The spectral version 1.1 of the Flexible Global Ocean--atmosphere--land
System (FGOALS1.1-s) model was developed in the State Key Laboratory of
Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics
at the Institute of Atmospheric Physics (LASG/IAP). This paper reports the
major modifications to the physical parameterization package in its
atmospheric component, including the radiation scheme, convection scheme,
and cloud scheme. Furthermore, the simulation of the East Asian Summer
Monsoon (EASM) by FGOALS1.1-s is examined, both in terms of climatological
mean state and interannual variability.
The results indicate that FGOALS1.1-s exhibits significant improvements in
the simulation of the balance of energy at the top of the atmosphere: the
net radiative energy flux at the top was 0.003 W m-2 in the 40 years
fully coupled integration. The distribution of simulated sea surface
temperature was also quite reasonable, without obvious climate drift.
FGOALS1.1-s is also capable of capturing the major features of the
climatological mean state of the EASM: major rainfall maximum centers, the
annual cycle of precipitation, and the lower-level monsoon circulation flow
were highly consistent with observations in the EASM region.
Regarding interannual variability, simulation of the EASM leading patterns
and their relationship with sea surface temperature was examined. The
results show that FGOALS1.1-s can reproduce the first leading pattern of the
EASM and its close relationship with the decaying phase of the ENSO.
However, the model lacked the ability to capture either the second major
mode of the EASM or its relationship with the developing phase of the ENSO. |
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| Keywords: | East Asian Summer Monsoon ocean--atmosphere--land model climatological mean state interannual variability ENSO |
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