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| The Onset of the Monsoon over the Bay of Bengal: The Year-to-Year Variations |
| YU Wei-Dong,LI Kui-Ping,SHI Jian-Wei,LIU Lin,WANG Hui-Wu,LIU Yan-Liang |
| Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061 |
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Abstract In situ buoy observation data spanning four years (2008–2011) were used to demonstrate the year-to-year variations of the monsoon onset processes in the Bay of Bengal (BoB). A significant early (late) monsoon onset event in 2009 (2010) was analyzed in detail. It is found that the year-to-year variations of monsoon onset can be attributed to either the interannual variability in the BoB SST or the irregular activities of the Intra-Seasonal Oscillation (ISO). This finding raises concern over the potential difficulties in simulating or predicting the monsoon onset in the BoB region. This uncertainty largely comes from the unsatisfactory model behavior at the intra-seasonal time scale.
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Received: 23 March 2012
Revised: 19 June 2012
Accepted: 25 June 2012
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