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DOI | 10.1175/JCLI-D-17-0781.1 |
The Northward-Propagating Intraseasonal Oscillations in the Northern Indian Ocean during Spring-Early Summer | |
Li, Kuiping1; Feng, Lin; Liu, Yanliang; Yang, Yang; Li, Zhi; Yu, Weidong | |
2018-09-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:17页码:7003-7017 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The intraseasonal oscillations (ISOs) activate in the tropical Indian Ocean (IO), exhibiting distinct seasonal contrasts in active regions and propagating features. The seasonal northward migration of the ISO activity initiates in spring-early summer, composed of two stages. Strong ISO activity first penetrates into the northern Bay of Bengal (BoB) around mid-April, and then extends to the northern Arabian Sea (AS) by mid-May. The northward-propagating ISOs (NPISOs) during their initiation periods, which are referred to as the primary northward-propagating (PNP) events, are analyzed with regard to the BoB and the AS, respectively. In terms of the BoB PNP event, the northward branch could be observed only in the BoB, and the eastward movement is still clear as the winter ISOs. For the AS PNP event, a strong northward branch spreads across the wider northern IO, as obvious as the summer ISOs. The relative roles of the seasonal environmental fields in modulating the PNP events are diagnosed based on a 2.5-layer atmospheric model. The results indicate that the seasonal variations of the surface moisture dominantly regulate the BoB PNP event, while both the surface moisture and the vertical wind shear are necessary for the AS PNP event. Additionally, the leading BoB PNP event is hypothesized to potentially act as a precondition of the following AS PNP event in terms of their internal ISO reinitiation processes and in terms of creating a favorable easterly shear environment in the northern IO. |
英文关键词 | Atmosphere Madden-Julian oscillation Intraseasonal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439919300005 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; SEA-SURFACE TEMPERATURE ; EQUATORIAL WAVES ; INTERANNUAL VARIATION ; EASTWARD PROPAGATION ; PACIFIC ; MOISTURE ; MONSOON ; MJO ; SEASONALITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20480 |
专题 | 气候变化 |
作者单位 | 1.SOA, Inst Oceanog 1, Ctr Ocean & Climate Res, Beijing, Peoples R China; 2.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Kuiping,Feng, Lin,Liu, Yanliang,et al. The Northward-Propagating Intraseasonal Oscillations in the Northern Indian Ocean during Spring-Early Summer[J]. JOURNAL OF CLIMATE,2018,31(17):7003-7017. |
APA | Li, Kuiping,Feng, Lin,Liu, Yanliang,Yang, Yang,Li, Zhi,&Yu, Weidong.(2018).The Northward-Propagating Intraseasonal Oscillations in the Northern Indian Ocean during Spring-Early Summer.JOURNAL OF CLIMATE,31(17),7003-7017. |
MLA | Li, Kuiping,et al."The Northward-Propagating Intraseasonal Oscillations in the Northern Indian Ocean during Spring-Early Summer".JOURNAL OF CLIMATE 31.17(2018):7003-7017. |
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