中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1472-1476.doi: 10.1088/1009-1963/16/5/051

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

郑彬, 谷德军, 林爱兰, 李春晖   

  1. Guangzhou Institute of Tropical and Marine Meteorology/the Key Open Laboratory for Tropical Monsoon,\\ China Meteorological Administration, Guangzhou 510080, China
  • 收稿日期:2006-09-06 修回日期:2006-10-19 出版日期:2007-05-20 发布日期:2007-05-20
  • 基金资助:
    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).

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)   

  1. Guangzhou Institute of Tropical and Marine Meteorology/the Key Open Laboratory for Tropical Monsoon, China Meteorological Administration, Guangzhou 510080, China
  • Received:2006-09-06 Revised:2006-10-19 Online:2007-05-20 Published:2007-05-20
  • Supported by:
    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).

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摘要： 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 α, SST-thermocline feedback coefficient γ and wind-evaporation feedback coefficient λ, 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.

关键词: South China Sea, western North Pacific, summer monsoon, tropospheric biennial\\ \hspace*{1.9cm} oscillation

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.

Key words: South China Sea, western North Pacific, summer monsoon, tropospheric biennial oscillation

中图分类号:  (Ocean/atmosphere interactions, air/sea constituent fluxes)

  • 92.60.Cc
92.10.Kp (Sea-air energy exchange processes) 92.10.af (Thermohaline convection) 92.60.Bh (General circulation)