Modulation of Madden-Julian Oscillation on the diurnal cycle of SST in the tropical Indian Ocean—Results from one dimensional mixed layer model

Yang Yang; Tim Li; Li Kuiping; Yu Weidong; Liu Yanliang

doi:10.3969/j.issn.0253-4193.2015.05.004

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Yang Yang, Tim Li, Li Kuiping, Yu Weidong, Liu Yanliang. Modulation of Madden-Julian Oscillation on the diurnal cycle of SST in the tropical Indian Ocean—Results from one dimensional mixed layer model[J]. Haiyang Xuebao, 2015, 37(5): 34-43. doi: 10.3969/j.issn.0253-4193.2015.05.004

Citation:

Yang Yang, Tim Li, Li Kuiping, Yu Weidong, Liu Yanliang. Modulation of Madden-Julian Oscillation on the diurnal cycle of SST in the tropical Indian Ocean—Results from one dimensional mixed layer model[J]. Haiyang Xuebao, 2015, 37(5): 34-43. doi: 10.3969/j.issn.0253-4193.2015.05.004

Citation:

Yang Yang, Tim Li, Li Kuiping, Yu Weidong, Liu Yanliang. Modulation of Madden-Julian Oscillation on the diurnal cycle of SST in the tropical Indian Ocean—Results from one dimensional mixed layer model[J]. Haiyang Xuebao, 2015, 37(5): 34-43. doi: 10.3969/j.issn.0253-4193.2015.05.004

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Modulation of Madden-Julian Oscillation on the diurnal cycle of SST in the tropical Indian Ocean—Results from one dimensional mixed layer model

doi: 10.3969/j.issn.0253-4193.2015.05.004

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
IPRC and Department of Meteorology, University of Hawaii, Honolulu, HI, USA
3.
Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received Date: 2014-09-10
Rev Recd Date: 2014-11-05

Abstract

Abstract

Modulated by the Madden-Julian Oscillation (MJO),the diurnal range of sea surface temperature (SST) peaks on the convection suppressed phase and drops to its lowest on the convection active phase. What's more,this kind of diurnal range on the developing phase of MJO is much larger than that on the decaying phase. Using a one-dimensional ocean mixed layer model,forced by the newly developed hourly reanalysis of sea surface fluxes,the cause of the difference of diurnal range of SST during the evolution of MJO is diagnosed quantitatively. It is demonstrated that the intro-seasonal variation of sea surface shortwave radiation is the main reason for the striking difference of diurnal range of SST between suppressed phase and active phase of MJO (40%). The intra-seasonal variation of wind stress (38%) and latent heat flux (14%) are also important. Due to the scale interaction between MJO perturbation and background circulation,the asymmetry of zonal wind stress determines the asymmetry of diurnal range of SST between developing and decaying phase of MJO.
- diurnal range of sea surface temperature (SST),
- Madden-Julian Oscillation,
- one dimensional ocean mixed layer model

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