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Chinese Physics, 2007, Vol. 16(5): 1472-1476    DOI: 10.1088/1009-1963/16/5/051
GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS Prev   Next  

Effects of South China Sea/western North Pacific summer monsoon on tropospheric biennial oscillation (TBO)

Zheng Bin(郑彬), Gu De-Jun(谷德军), Lin Ai-Lan(林爱兰), and Li Chun-Hui(李春晖)
Guangzhou Institute of Tropical and Marine Meteorology/the Key Open Laboratory for Tropical Monsoon, China Meteorological Administration, Guangzhou 510080, China
Abstract  Several theories have been developed to explain tropical biennial oscillation (TBO), as an air--sea interactive system to impact Asian and global weather and climate, and some models have been established to produce a TBO. A simple 5-box model, with almost all the key processes associated with TBO, can produce a TBO by including air--sea interactions in the monsoon regions. Despite that, the South China Sea/western North Pacific summer monsoon (SCS/WNPSM), a very important monsoon subsystem, is neglected. In this paper, based on the dynamical framework of 5-box model, the term of SCS/WNPSM has been added and a 6-box model has been developed. Comparing the difference of TBO sensibilities with several key parameters, air--sea coupling coefficient $\alpha$, SST-thermocline feedback coefficient $\gamma$ and wind-evaporation feedback coefficient $\lambda$, between the modified model and original model, TBO is more sensible to the parameters in the new model. The results imply that the eastern Pacific and local wind-evaporation play more important roles in the TBO when including SCS/WNPSM.
Keywords:  South China Sea      western North Pacific      summer monsoon      tropospheric biennial oscillation  
Received:  06 September 2006      Revised:  19 October 2006      Accepted manuscript online: 
PACS:  92.60.Cc (Ocean/atmosphere interactions, air/sea constituent fluxes)  
  92.10.Kp (Sea-air energy exchange processes)  
  92.10.af (Thermohaline convection)  
  92.60.Bh (General circulation)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No~40505019) and the Open Research Fund of Laboratory of China Meteorological Administration (Grant No~CMATG2006L03).

Cite this article: 

Zheng Bin(郑彬), Gu De-Jun(谷德军), Lin Ai-Lan(林爱兰), and Li Chun-Hui(李春晖) Effects of South China Sea/western North Pacific summer monsoon on tropospheric biennial oscillation (TBO) 2007 Chinese Physics 16 1472

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