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PCMDI > WCRP CMIP3 Model Output > Diagnostic Subprojects Printer Friendly Version
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  • Ravi S. Nanjundiah, V. Vidyunmala, J. Srinivasan, 2005: The impact of increase in CO2 on the simulation of tropical biennial oscillations (TBO) in 12 coupled general circulation models. Atmospheric Science Lett, 6, 183-191, doi:10.1002/asl.115.

The Tropical Biennial Oscillation (TBO) in coupled GCM simulations over the Indo-Pacific region in IPCC-AR4 scenarios of 280 (PI) and 720 (FS) ppm of CO2 (both stable) are investigated. In many models, TBO is more prominent in FS in Nino3.4 SST and rainfall but less prominent in Indian Ocean SST. TBO, as primary mode (mode with highest power), is simulated by more models in Indian and Australian rainfall during FS. Thus, the Indo-Pacific teleconnection through Walker circulation rather than local forcing over the Indian Ocean could be responsible for increased TBO in Indian and Australian rainfall.

Full Article: http://doi.wiley.com/10.1002/asl.115

Last Updated: 2007-02-26

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