Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal
Abstract By focusing on the intraseasonal mesoscale eddy kinetic energy, this study comprehensively distinguishes the influences of El Niño‐Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) on eddy activities in the Bay of Bengal. Altimetry records since 1993 show that intraseasonal mesoscal...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL111578 |
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| author | Zheen Zhang Xueen Chen Lequan Chi Chunxin Yuan Jie Zhang Shuyan Zhang |
| author_facet | Zheen Zhang Xueen Chen Lequan Chi Chunxin Yuan Jie Zhang Shuyan Zhang |
| author_sort | Zheen Zhang |
| collection | DOAJ |
| description | Abstract By focusing on the intraseasonal mesoscale eddy kinetic energy, this study comprehensively distinguishes the influences of El Niño‐Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) on eddy activities in the Bay of Bengal. Altimetry records since 1993 show that intraseasonal mesoscale activities are enhanced in the middle (∼15°N) and southern bay approximately 6 months and 8 months after El Niño peaks, respectively, through the wave‐dominated approach. Meanwhile, influences from IOD manifest more rapidly and concentrate in the western bay, suggesting distinct mechanisms compared to those associated with ENSO. Further investigations reveal asymmetric effects linked to the phase of ENSO and IOD: positive ENSO events (El Niño) and negative IOD events are followed by enhanced intraseasonal mesoscale activities in the BoB, potentially triggered by the warmer background in the tropical Indian Ocean and the bay during these events, respectively. However, influences from the opposite phases are neglectable. |
| format | Article |
| id | doaj-art-4f0b0f88dd6d4f6bb6adbec6dfdfece8 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-4f0b0f88dd6d4f6bb6adbec6dfdfece82025-01-20T13:05:57ZengWileyGeophysical Research Letters0094-82761944-80072025-01-01521n/an/a10.1029/2024GL111578Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of BengalZheen Zhang0Xueen Chen1Lequan Chi2Chunxin Yuan3Jie Zhang4Shuyan Zhang5Frontier Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Physical Oceanography Ocean University of China Qingdao ChinaFrontier Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Physical Oceanography Ocean University of China Qingdao ChinaFrontier Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Physical Oceanography Ocean University of China Qingdao ChinaSchool of Mathematical Sciences Ocean University of China Qingdao ChinaCollege of Oceanic and Atmospheric Sciences Ocean University of China Qingdao ChinaCollege of Oceanic and Atmospheric Sciences Ocean University of China Qingdao ChinaAbstract By focusing on the intraseasonal mesoscale eddy kinetic energy, this study comprehensively distinguishes the influences of El Niño‐Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) on eddy activities in the Bay of Bengal. Altimetry records since 1993 show that intraseasonal mesoscale activities are enhanced in the middle (∼15°N) and southern bay approximately 6 months and 8 months after El Niño peaks, respectively, through the wave‐dominated approach. Meanwhile, influences from IOD manifest more rapidly and concentrate in the western bay, suggesting distinct mechanisms compared to those associated with ENSO. Further investigations reveal asymmetric effects linked to the phase of ENSO and IOD: positive ENSO events (El Niño) and negative IOD events are followed by enhanced intraseasonal mesoscale activities in the BoB, potentially triggered by the warmer background in the tropical Indian Ocean and the bay during these events, respectively. However, influences from the opposite phases are neglectable.https://doi.org/10.1029/2024GL111578 |
| spellingShingle | Zheen Zhang Xueen Chen Lequan Chi Chunxin Yuan Jie Zhang Shuyan Zhang Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal Geophysical Research Letters |
| title | Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal |
| title_full | Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal |
| title_fullStr | Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal |
| title_full_unstemmed | Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal |
| title_short | Large‐Scale Climate Patterns Modulate Intraseasonal Mesoscale Activities in the Bay of Bengal |
| title_sort | large scale climate patterns modulate intraseasonal mesoscale activities in the bay of bengal |
| url | https://doi.org/10.1029/2024GL111578 |
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