Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation
Abstract This study investigates the interannual variability of the North Pacific Central Mode Water (CMW) under the phase relationship of the El Niño–Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), based on multiple observational data sets. Peaks and troughs of the CMW variab...
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| Format: | Article |
| Language: | English |
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Wiley
2025-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL113064 |
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| author | Jing Liu Lixiao Xu Xiao‐Tong Zheng Keyao Wang Junliang Li |
| author_facet | Jing Liu Lixiao Xu Xiao‐Tong Zheng Keyao Wang Junliang Li |
| author_sort | Jing Liu |
| collection | DOAJ |
| description | Abstract This study investigates the interannual variability of the North Pacific Central Mode Water (CMW) under the phase relationship of the El Niño–Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), based on multiple observational data sets. Peaks and troughs of the CMW variability are primarily observed when ENSO and PDO are in phase, but only moderate variation when ENSO and PDO are out of phase. In El Niño spring during positive PDO, extreme CMW ventilation takes place in the central North Pacific (180°–155°W, 30°–40°N), where no local ventilation occurs for other cases. Such extreme CMW ventilation induces stronger temperature anomalies, which persist longer and penetrate deeper. Our results suggest that CMW, representing a long‐term ocean memory, may play a more significant role in tropical‐extratropical interactions than ever expected. |
| format | Article |
| id | doaj-art-0bd95edc27e44efbb95c5ad62ec72b61 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-0bd95edc27e44efbb95c5ad62ec72b612025-08-20T03:52:32ZengWileyGeophysical Research Letters0094-82761944-80072025-03-01526n/an/a10.1029/2024GL113064Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal OscillationJing Liu0Lixiao Xu1Xiao‐Tong Zheng2Keyao Wang3Junliang Li4Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory Ocean University of China Qingdao ChinaFrontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory Ocean University of China Qingdao ChinaFrontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory Ocean University of China Qingdao ChinaFrontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory Ocean University of China Qingdao ChinaCollege of Oceanic and Atmospheric Sciences Ocean University of China Qingdao ChinaAbstract This study investigates the interannual variability of the North Pacific Central Mode Water (CMW) under the phase relationship of the El Niño–Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), based on multiple observational data sets. Peaks and troughs of the CMW variability are primarily observed when ENSO and PDO are in phase, but only moderate variation when ENSO and PDO are out of phase. In El Niño spring during positive PDO, extreme CMW ventilation takes place in the central North Pacific (180°–155°W, 30°–40°N), where no local ventilation occurs for other cases. Such extreme CMW ventilation induces stronger temperature anomalies, which persist longer and penetrate deeper. Our results suggest that CMW, representing a long‐term ocean memory, may play a more significant role in tropical‐extratropical interactions than ever expected.https://doi.org/10.1029/2024GL113064subtropical mode waterventilationPacific decadal OscillationEl Niño‐Southern OscillationAleutian lowocean‐atmosphere interaction |
| spellingShingle | Jing Liu Lixiao Xu Xiao‐Tong Zheng Keyao Wang Junliang Li Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation Geophysical Research Letters subtropical mode water ventilation Pacific decadal Oscillation El Niño‐Southern Oscillation Aleutian low ocean‐atmosphere interaction |
| title | Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation |
| title_full | Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation |
| title_fullStr | Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation |
| title_full_unstemmed | Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation |
| title_short | Extreme Ventilation of the North Pacific Central Mode Water by El Niño During Positive Phase of the Pacific Decadal Oscillation |
| title_sort | extreme ventilation of the north pacific central mode water by el nino during positive phase of the pacific decadal oscillation |
| topic | subtropical mode water ventilation Pacific decadal Oscillation El Niño‐Southern Oscillation Aleutian low ocean‐atmosphere interaction |
| url | https://doi.org/10.1029/2024GL113064 |
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