01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-03-0110 |
| Title of Abstract | Ocean preconditioning the Asian-Australian monsoon onset |
| Authors | Weidong Yu*, Tian Ma, Xiaorong Fang, Kuiping Li, Yongliang Duan, Chunlin Ning, Yanliang Liu, Zhi Li, Huiwu Wang, Lin Liu, Somkiat Khokiattiwong, Rameyo Adi, Salvienty Makarim, Budi Sulistiyo |
| Organisation | Sun Yat-Sen University |
| Address | A352, Bld Hai-Qin-2 Zhuhai, Guangdong, China Pincode: 519082 E-mail: yuwd@mail.sysu.edu.cn |
| Country | China |
| Presentation | Oral |
| Abstract | The Asian monsoon region is characterized by the abrupt onset, i.e. the quick dry-wet transition in days. The classic theory emphasizes the elevated heating effect of the Tibetan Plateau in boreal spring. However, three Asian monsoon components (Indian monsoon, Bay of Bengal monsoon and South China Sea monsoon) do not onset simultaneously, but with the surprising sequence of Bay of Bengal, South China Sea and India. With the microwave satellite such as TRMM and the Indian Ocean Observing System (IndOOS), the sea surface temperature (SST) data clearly reveals that the ocean preconditions the monsoon onset. SST reach the annual peak before the monsoon onset, which helps trigger the monsoon onset through attracting the intra-seasonal oscillation (ISO) into the region. The extension into Australian monsoon onset reaffirms the validity of the present conceptual model. This provides the physical basis for the challenging prediction of monsoon onset, its inter-annual variations and the associated marine heatwave disasters. |
| Are you part of IIOE-2 endorsed project | yes |
| Endorsed Project Number | IIOE2-EP13 |
| Keywords | monsoon onset, SST, precondition, intraseasonal oscillation, ocean-atmosphere interaction |
| For Awards | no |