Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea
Abstract Herein, we report a strong in-phase covariability of tropical cyclone (TC) activity between the Bay of Bengal (BOB) and the South China Sea (SCS) during October–December of 1979–2019, and which is also the dominant mode of BOB–SCS TC activity, accounting for 35% of the total variances in TC...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | npj Climate and Atmospheric Science |
| Online Access: | https://doi.org/10.1038/s41612-023-00506-z |
| _version_ | 1797630314553540608 |
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| author | Zeming Wu Chundi Hu Lifei Lin Weizhen Chen Lixuan Huang Zijian Lin Song Yang |
| author_facet | Zeming Wu Chundi Hu Lifei Lin Weizhen Chen Lixuan Huang Zijian Lin Song Yang |
| author_sort | Zeming Wu |
| collection | DOAJ |
| description | Abstract Herein, we report a strong in-phase covariability of tropical cyclone (TC) activity between the Bay of Bengal (BOB) and the South China Sea (SCS) during October–December of 1979–2019, and which is also the dominant mode of BOB–SCS TC activity, accounting for 35% of the total variances in TC track density. This inter-basin TC covariance is closely linked to the anomalies of tropical sea surface temperature, appearing as the intrinsic Indo-Pacific Tripole mode, which significantly affects the atmospheric circulations overlying the BOB–SCS. Interestingly, this mechanism works via modulating the local TC genesis frequency in the BOB–SCS. However, in terms of the migrated TCs among them, the Indo-Pacific Tripole mainly regulates their genesis location but not their frequency. More importantly, such inter-basin TC covariability still exists significantly even when the TC track data migrating from the SCS into the BOB are excluded. After all, only 19 TCs during the 41 years (1979–2019) are observed to migrate from the SCS to the BOB, which can only contribute slightly to increasing the covariability of BOB–SCS TC-track activity, but do not play a dominant role. Further, the numerical simulations suggest that although both the Indian and Pacific Oceans contribute to the atmospheric anomalies that affect the BOB–SCS TC activity, the Pacific-effect is twice as important. |
| first_indexed | 2024-03-11T11:06:38Z |
| format | Article |
| id | doaj.art-7bea4912043d4ffebb85d6d3736dd7a1 |
| institution | Directory Open Access Journal |
| issn | 2397-3722 |
| language | English |
| last_indexed | 2024-03-11T11:06:38Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Climate and Atmospheric Science |
| spelling | doaj.art-7bea4912043d4ffebb85d6d3736dd7a12023-11-12T12:11:36ZengNature Portfolionpj Climate and Atmospheric Science2397-37222023-11-016111210.1038/s41612-023-00506-zUnraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China SeaZeming Wu0Chundi Hu1Lifei Lin2Weizhen Chen3Lixuan Huang4Zijian Lin5Song Yang6Ocean College, Zhejiang UniversityOcean College, Zhejiang UniversitySchool of Atmospheric Sciences, Sun Yat-sen UniversitySchool of Atmospheric Sciences, Sun Yat-sen UniversitySchool of Atmospheric Sciences, Sun Yat-sen UniversityOcean College, Zhejiang UniversitySouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Abstract Herein, we report a strong in-phase covariability of tropical cyclone (TC) activity between the Bay of Bengal (BOB) and the South China Sea (SCS) during October–December of 1979–2019, and which is also the dominant mode of BOB–SCS TC activity, accounting for 35% of the total variances in TC track density. This inter-basin TC covariance is closely linked to the anomalies of tropical sea surface temperature, appearing as the intrinsic Indo-Pacific Tripole mode, which significantly affects the atmospheric circulations overlying the BOB–SCS. Interestingly, this mechanism works via modulating the local TC genesis frequency in the BOB–SCS. However, in terms of the migrated TCs among them, the Indo-Pacific Tripole mainly regulates their genesis location but not their frequency. More importantly, such inter-basin TC covariability still exists significantly even when the TC track data migrating from the SCS into the BOB are excluded. After all, only 19 TCs during the 41 years (1979–2019) are observed to migrate from the SCS to the BOB, which can only contribute slightly to increasing the covariability of BOB–SCS TC-track activity, but do not play a dominant role. Further, the numerical simulations suggest that although both the Indian and Pacific Oceans contribute to the atmospheric anomalies that affect the BOB–SCS TC activity, the Pacific-effect is twice as important.https://doi.org/10.1038/s41612-023-00506-z |
| spellingShingle | Zeming Wu Chundi Hu Lifei Lin Weizhen Chen Lixuan Huang Zijian Lin Song Yang Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea npj Climate and Atmospheric Science |
| title | Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea |
| title_full | Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea |
| title_fullStr | Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea |
| title_full_unstemmed | Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea |
| title_short | Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea |
| title_sort | unraveling the strong covariability of tropical cyclone activity between the bay of bengal and the south china sea |
| url | https://doi.org/10.1038/s41612-023-00506-z |
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