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Air-sea interactions associated with tropospheric biennial oscillation in South China Sea summer monsoon and their effects on El Nio-Southern oscillation

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Acta Oceanologica Sinica 2013年第6期32卷 6-12页

作者： ZHENG Bin LU Feng WEI Hongcheng Guangzhou Institute of Tropical and Marine Meteorology China Meteorological Administration Nanjing University of Information Science & Technology

The South China Sea summer monsoon （SCSSM） behaves with prominent climate variability from the in- traseasonal to interdecadal time scales. On the interannual time scale, the biennial variability （so-called tropospheric biennial oscillation, TBO） is as important as the E1 Nifio-Southem oscillation （ENSO） period. Some observed data sets, including reanalysis data, are used to explore the associated air-sea interactive physical processes and how the SCSSM TBO affects the ENSO. The results show that the shearing vorticity induced by the north Indian Ocean sea surface temperature anomalies （SSTAs） and the anomalous Philip- pine Sea anticyclone both contribute to the TBO in the SCSSM. The results also indicate that the ENSO has a weak effect on the SCSSM TBO, whereas the latter affects the ENSO to some extent.

关键词： South China Sea monsoon tropospheric biennial oscillation El Nifio-Southern oscillation

Spatial Patterns of tropospheric biennial oscillation and Its Numerical Simulation

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Advances in Atmospheric Sciences 2008年第5期25卷 815-823页

作者：郑彬谷德军林爱兰李春晖 Guangzhou Institute of Tropical and Marine Meteorology/Key Open Laboratoryfor Tropical Monsoon China Meteorological Administration

In order to investigate the spatial patterns of the tropospheric biennial oscillation （TBO） on the global scale, the Climate Prediction Center （CPC） Merged Analysis of Precipitation （CMAP） monthly averaged precipitation and the Climate Diagnostics Center （CDC） monthly outgoing long-wave radiation （OLR） and SST are used in conjunction with TBO bandpass-filtering. The results indicate active biennial variability in the tropical eastern-central Pacific regions. It is evident that observations reflect the biennial component of the ENSO rather than the TBO itself. Since some studies have pointed out that the TBO is a broad-scale phenomenon differing from the ENSO, to investigate the pure TBO the ENSO signal must be excluded. The Scale Interaction Experiment-FRCGC （SINTEX-F） coupled general circulation model （CGCM） developed at Japan Frontier Research Center for Global Change （FRCGC） can capture both the ENSO and the biennial signals. Air-sea interactions in the tropical eastern-central Pacific are decoupled to eliminate the effects of ENSO in a experiment by SINTEX-F and the results show that biennial variability still exists even without ENSO. It seems to mean that the TBO and ENSO are independent from each other. Furthermore, the model results indicate that the two key regions are southwest Sumatra and the tropical western Pacific for the TBO cycle.

关键词： tropospheric biennial oscillation air-sea interaction spatial pattern

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

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Chinese Physics B 2007年第5期16卷 1472-1476页

作者：郑彬谷德军林爱兰李春晖 Guangzhou Institute of Tropical and Marine Meteorology/the Key Open Laboratory for Tropical Monsoon China Meteorological Administration Guangzhou 510080 China

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 airsea 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 γand 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 oscillation

Spatial Patterns of tropospheric biennial oscillation and Its Numerical Simulation

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Spatial Patterns of Tropospheric Biennial Oscillation and It...

Dynamical mechanism of the stratospheric quasibiennial oscillation impact on the South China Sea Summer Monsoon

中国气象学会2007年年会

作者： Zheng Bin Gu Dejun Lin Ailan Li Chunhui J. Luo S.Masson T.Yamagata Guangzhou Institute of Tropical and Marine Meteorology/Key Open Laboratory for Tropical Monsoon!Guangzhou China Frontier Research Center for Global Change JAMSTECYokohamaJapan

In order to investigate the spatial patterns of tropospheric biennial oscillation（TBO） in the global region,the Climate Prediction Center（CPC） Merged Analysis of Precipitation（CMAP） monthly averaged precipitation and the Climate Diagnostics Center（CDC） monthly outgoing long-wave radiation（OLR） and sea surface temperature（SST） are used by TBO *** results indicate active biennial variability in the tropical eastern-central Pacific *** is evident that observations reflect the biennial component of the ENSO rather than the TBO *** some studies had pointed out that the TBO is a broad-scale phenomenon differing from the ENSO,to investigate the pure TBO must exclude the ENSO *** SINTEX-F coupled general circulation model（CGCM） developed at Japan Frontier Research Center for Global Change can capture both the ENSO and the biennial *** air-sea interactions in the tropical eastern-central Pacific are decoupled to eliminate the effects of the ENSO in a experiment by the SINTEX-F and the results show that biennial variability still exists even without the *** seems to mean that the TBO and ENSO are independent from each ***,the model results indicate the two key regions in the southwest to Sumatra and tropical western pacific for the TBO cycle.

关键词： tropospheric biennial oscillation air-sea interaction spatial pattern

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Science China Earth Sciences 2007年第9期50卷 1424-1432页

作者： ZHENG Bin GU DeJun LIN AiLan LI ChunHui Guangzhou Institute of Tropical and Marine Meteorology/Key Open Laboratory for Tropical Monsoon China Meteorological AdministrationGuangzhou 510080China

The National Center for the Atmospheric Research(NCAR)middle atmospheric model is used to study the effects of the quasi-biennial oscillation in the stratosphere(QBO)on the tropopause and uppe troposphere,and the relationship between the QBO and South China Sea Summer Monsoon SCSSM is explored through NCEP(the National Centers for Environmental Prediction)/NCAR,ECMWF(Euro pean Centre for Medium-Range Weather Forecasts)monthly mean wind data and in situ sounding data The simulations show that the QBO-induced residual circulations propagate downwards,and affect the tropopause and upper troposphere during the periods of mid-late QBO phase and phase transition Meanwhile,diagnostic analyses indicate that anomalous circulation similar to SCSSM circulation is generated to strengthen the SCSSM during the easterly phase and anomalous Hadley-like circulation weakens the SCSSM during the *** the QBO has effects on the SCSSM by meridiona circulation,it is not a sole mechanism on the SCSSM TBO mode.

关键词： stratospheric quasi-biennial oscillation South China Sea Summer Monsoon tropospheric biennial oscillation