报告题目1：The Seasonal Alternate Roles of the North Pacific and the South Pacific in the Equatorial Pacific Zonal Winds and ENSO

报告摘要：Zonal wind fluctuations in the central-to-western equatorial Pacific (CWEP) profoundly promote ENSO events by involving in a series of multi-scale air-sea interactions. Using ensemble empirical mode decomposition method, we find that ENSO variance can be mostly attributed by the interannual component of CWEP zonal winds by leading two months. Thus, it is of great significant interest to understand the predictability of these ENSO-related winds. Our result shows that the North Pacific Oscillation and the South Pacific Oscillation alternatively fuel the CWEP zonal wind anomalies from the late boreal winter to the fall. These two subtropical boosters provide clues to the interannual changes in both the CWEP zonal winds and equatorial eastern Pacific sea surface temperatures. The seasonal component of equatorial Pacific is weakly correlated with ENSO, however, which is strongly associated with the East Asian winter monsoon and Australian cross-equatorial flow (CEF) during the boreal summer-fall. These monsoon-related westerly wind anomalies fade in March–April–May, potentially undermining the CWEP westerly winds and the predictability of ENSO in the boreal spring. The result also reflects that the tropical-extratropical interactions are seasonally alternate between the North Hemisphere and the South Hemisphere following the climatic annual cycle.

报告题目2：Parameter optimization of marine biogeochemical model by using satellite and BGC-Argo observations in the northern South China Sea
报告人：舒婵 2018级博士研究生

会议时间：2021年4月22日（周四）上午09:00 

会议地点（线下）：2号楼1201会议室

线上腾讯会议ID：484 291 077  腾讯会议链接：https://meeting.tencent.com/s/jPTBDsWMqudB
主持人：张荣望 副研究员，鲁远征 助理研究员