Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter
This study investigates the origins of intraseasonal rainfall variations over the southern South China Sea (SCS) region in boreal winter. It is found that intraseasonal rainfall variations over the southern SCS have different origins on the 10–20-day and 30–60-day time scales. On the 10–20-day time...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2017-01-01
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| Series: | Atmospheric and Oceanic Science Letters |
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| Online Access: | http://dx.doi.org/10.1080/16742834.2017.1232584 |
| _version_ | 1818672878225195008 |
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| author | Xi CAO Ren-Guang WU |
| author_facet | Xi CAO Ren-Guang WU |
| author_sort | Xi CAO |
| collection | DOAJ |
| description | This study investigates the origins of intraseasonal rainfall variations over the southern South China Sea (SCS) region in boreal winter. It is found that intraseasonal rainfall variations over the southern SCS have different origins on the 10–20-day and 30–60-day time scales. On the 10–20-day time scale, large rainfall anomalies over the southern SCS are preceded by strong northerly wind anomalies associated with the East Asian winter monsoon (EAWM), by about two days. On the 30–60-day time scale, the strong EAWM-related northerly wind anomalies almost appear simultaneously with large rainfall anomalies over the southern SCS. In addition, obvious large rainfall anomalies occur over the southeastern tropical Indian Ocean about one week before the peak southern SCS rainfall anomalies. It indicates that the convection and related circulation anomalies with origins over the tropical Indian Ocean may play an important role in inducing intraseasonal rainfall variations over the southern SCS on the 30–60-day time scale, but not on the 10–20-day time scale. |
| first_indexed | 2024-12-17T07:46:53Z |
| format | Article |
| id | doaj.art-8b5d1e5f06964593a136bc19633c2b45 |
| institution | Directory Open Access Journal |
| issn | 1674-2834 2376-6123 |
| language | English |
| last_indexed | 2024-12-17T07:46:53Z |
| publishDate | 2017-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Atmospheric and Oceanic Science Letters |
| spelling | doaj.art-8b5d1e5f06964593a136bc19633c2b452022-12-21T21:57:59ZengKeAi Communications Co., Ltd.Atmospheric and Oceanic Science Letters1674-28342376-61232017-01-01101445010.1080/16742834.2017.12325841232584Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winterXi CAO0Ren-Guang WU1Chinese Academy of SciencesChinese Academy of SciencesThis study investigates the origins of intraseasonal rainfall variations over the southern South China Sea (SCS) region in boreal winter. It is found that intraseasonal rainfall variations over the southern SCS have different origins on the 10–20-day and 30–60-day time scales. On the 10–20-day time scale, large rainfall anomalies over the southern SCS are preceded by strong northerly wind anomalies associated with the East Asian winter monsoon (EAWM), by about two days. On the 30–60-day time scale, the strong EAWM-related northerly wind anomalies almost appear simultaneously with large rainfall anomalies over the southern SCS. In addition, obvious large rainfall anomalies occur over the southeastern tropical Indian Ocean about one week before the peak southern SCS rainfall anomalies. It indicates that the convection and related circulation anomalies with origins over the tropical Indian Ocean may play an important role in inducing intraseasonal rainfall variations over the southern SCS on the 30–60-day time scale, but not on the 10–20-day time scale.http://dx.doi.org/10.1080/16742834.2017.1232584Intraseasonal rainfall anomaliessouthern South China Seaboreal winter10–20-day and 30–60-day time scales |
| spellingShingle | Xi CAO Ren-Guang WU Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter Atmospheric and Oceanic Science Letters Intraseasonal rainfall anomalies southern South China Sea boreal winter 10–20-day and 30–60-day time scales |
| title | Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter |
| title_full | Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter |
| title_fullStr | Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter |
| title_full_unstemmed | Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter |
| title_short | Origins of intraseasonal rainfall variations over the southern South China Sea in boreal winter |
| title_sort | origins of intraseasonal rainfall variations over the southern south china sea in boreal winter |
| topic | Intraseasonal rainfall anomalies southern South China Sea boreal winter 10–20-day and 30–60-day time scales |
| url | http://dx.doi.org/10.1080/16742834.2017.1232584 |
| work_keys_str_mv | AT xicao originsofintraseasonalrainfallvariationsoverthesouthernsouthchinaseainborealwinter AT renguangwu originsofintraseasonalrainfallvariationsoverthesouthernsouthchinaseainborealwinter |