fnctId=thesis,fnctNo=414
Recent asymmetric tropic ocean warming has altered regional propagation of Madden-Julian Oscilaltion
- 작성자
- 기후시스템전공
- 저자
- Hye-Ryeom Kim, Kyung-Ja Ha, Mathew Koll Roxy, Eui-Seok Chung, Bin Wang, Sun-Seon Lee, Ja-Yeon Moon
- 발행사항
- 발행일
- 2025-08-14
- 저널명
- Communications Earth and Environment
- 국문초록
- 영문초록
- Tropical sea surface temperature warming displays distinct regional patterns, but its influence on Madden-Julian Oscillation propagation remains unclear. Here we investigate how a shift toward La Nina-like conditions around 1999 has affected Madden-Julian Oscillation propagation by comparing two periods: 1979?1998 and 2003?2022. Using satellite observations and reanalysis data, we show that propagation accelerated over the Indian Ocean and the Maritime Continent but slowed over the western Pacific in the later period. These contrasting responses are linked to changes in sea surface temperature patterns and associated atmospheric conditions. Over the Indian Ocean, enhanced low-level horizontal moisture gradients and increased upper-tropospheric stability facilitate propagation, while weakened moisture gradient and suppressed convection hinder it over the western Pacific. Despite complex terrain and atmospheric interactions over the Maritime Continent, background changes still favor enhanced propagation. These findings highlight the sensitivity of Madden-Julian Oscillation behavior to regional ocean?atmospheric conditions, with implications for improving subseasonal prediction.
- 일반텍스트
- 첨부파일