Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans
Abstract In boreal winter, the Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal oscillation (ISO), which bridges weather and climate. In addition to the dominant eastward propagating MJO mode, this study identifies the existence of the westward propagating and stationar...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-05-01
|
| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL113263 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849689661591519232 |
|---|---|
| author | Yiran Li Haibo Hu Fei Liu Matthew Patterson Xiu‐Qun Yang Kecheng Lu Kefeng Mao Ziyi Wang Rongrong Wang |
| author_facet | Yiran Li Haibo Hu Fei Liu Matthew Patterson Xiu‐Qun Yang Kecheng Lu Kefeng Mao Ziyi Wang Rongrong Wang |
| author_sort | Yiran Li |
| collection | DOAJ |
| description | Abstract In boreal winter, the Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal oscillation (ISO), which bridges weather and climate. In addition to the dominant eastward propagating MJO mode, this study identifies the existence of the westward propagating and stationary oscillating ISO modes according to the spatio‐temporal evolution of large‐scale precipitation. At the pentad timescale, each ISO mode tends to suppress the occurrence of the other two. The diagnostic of column‐integrated moist static energy (MSE) tendency anomalies reveals the dominant contribution from horizontal MSE advection to each ISO mode. Synthesis results indicate that vertical zonal wind shear anomalies exhibit opposite distributions between the propagating and stationary oscillating ISO events over the tropical Indo‐Pacific Oceans. Subsequent simulations prove that the easterly (westerly) wind shear anomalies could suppress the eastward (westward) propagating convection of the ISO, thus favoring a stationary oscillating ISO. |
| format | Article |
| id | doaj-art-43da925e492d444686e8d7a79b15c821 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-43da925e492d444686e8d7a79b15c8212025-08-20T03:21:32ZengWileyGeophysical Research Letters0094-82761944-80072025-05-01529n/an/a10.1029/2024GL113263Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific OceansYiran Li0Haibo Hu1Fei Liu2Matthew Patterson3Xiu‐Qun Yang4Kecheng Lu5Kefeng Mao6Ziyi Wang7Rongrong Wang8CMA Key Laboratory for Climate Prediction Studies School of Atmospheric Sciences Nanjing University Nanjing ChinaCMA Key Laboratory for Climate Prediction Studies School of Atmospheric Sciences Nanjing University Nanjing ChinaKey Laboratory of Tropical Atmosphere‐Ocean System Ministry of Education, and Southern Marine Science and Engineering Guangdong Laboratory School of Atmospheric Sciences Sun Yat‐Sen University Zhuhai ChinaSchool of Earth and Environmental Sciences, and School of Mathematics and Statistics University of St Andrews St Andrews UKCMA Key Laboratory for Climate Prediction Studies School of Atmospheric Sciences Nanjing University Nanjing ChinaCMA Key Laboratory for Climate Prediction Studies School of Atmospheric Sciences Nanjing University Nanjing ChinaCollege of Advanced Interdisciplinary Studies National University of Defense Technology Changsha ChinaFlight Test Center of the Commercial Aircraft Corporation Shanghai ChinaGuizhou Power Dispatching Center Guiyang ChinaAbstract In boreal winter, the Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal oscillation (ISO), which bridges weather and climate. In addition to the dominant eastward propagating MJO mode, this study identifies the existence of the westward propagating and stationary oscillating ISO modes according to the spatio‐temporal evolution of large‐scale precipitation. At the pentad timescale, each ISO mode tends to suppress the occurrence of the other two. The diagnostic of column‐integrated moist static energy (MSE) tendency anomalies reveals the dominant contribution from horizontal MSE advection to each ISO mode. Synthesis results indicate that vertical zonal wind shear anomalies exhibit opposite distributions between the propagating and stationary oscillating ISO events over the tropical Indo‐Pacific Oceans. Subsequent simulations prove that the easterly (westerly) wind shear anomalies could suppress the eastward (westward) propagating convection of the ISO, thus favoring a stationary oscillating ISO.https://doi.org/10.1029/2024GL113263 |
| spellingShingle | Yiran Li Haibo Hu Fei Liu Matthew Patterson Xiu‐Qun Yang Kecheng Lu Kefeng Mao Ziyi Wang Rongrong Wang Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans Geophysical Research Letters |
| title | Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans |
| title_full | Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans |
| title_fullStr | Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans |
| title_full_unstemmed | Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans |
| title_short | Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans |
| title_sort | distinct intraseasonal oscillation modes over the tropical indo pacific oceans |
| url | https://doi.org/10.1029/2024GL113263 |
| work_keys_str_mv | AT yiranli distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT haibohu distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT feiliu distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT matthewpatterson distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT xiuqunyang distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT kechenglu distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT kefengmao distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT ziyiwang distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans AT rongrongwang distinctintraseasonaloscillationmodesoverthetropicalindopacificoceans |