Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0616.1 |
Seasonal and Interannual Variabilities of the Central Indian Ocean Mode | |
Zhou, Lei1,2; Murtugudde, Raghu3; Chen, Dake1; Tang, Youmin1,4 | |
2017-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Canada |
英文摘要 | The central Indian Ocean (CIO) mode, an intrinsic coupled mode, plays an important role in the intra-seasonal variabilities over the Indian monsoon region. Besides the intraseasonal variabilities, the CIO mode also has pronounced seasonal and interannual variabilities. The CIO mode is active during boreal summer but suppressed during boreal winter. The seasonality is mainly attributable to the barotropic instability, which is caused by the large meridional shear of zonal winds. By decomposing the temporal tendency of the meridional gradient of zonal winds, it is found that the zonal wind shear mainly follows the variation of the horizontal eddy flux, which indicates the importance of the multiscale interaction in tropical dynamics. The interannual variability of the CIO mode also depends on the energy transfer associated with the barotropic instability. The influences of El Nino or La Nina and Indian Ocean dipole-zonal mode (IODZM) on the CIO mode are analyzed. El Nino and La Nina have moderate impacts on the CIO mode. El Nino weakens the CIO mode and La Nina strengthens it via the changes in the low-level zonal wind shear. IODZM does not significantly change the amplitude of the CIO mode but can shift its latitudinal position by modifying the meridional shear of the zonal winds. The low-frequency variabilities of the CIO mode at seasonal and interannual time scales unveil the impacts of the background circulations at the intraseasonal variabilities during the Indian summer monsoon in a multiscale framework. While the low-frequency variabilities of this mode will clearly have an implication for monsoon variability and prediction, further studies are needed to quantify the impacts. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406040200025 |
WOS关键词 | SUMMER INTRASEASONAL OSCILLATION ; MADDEN-JULIAN OSCILLATION ; SEA-SURFACE TEMPERATURE ; EL-NINO ; BOREAL SUMMER ; ZONAL MODE ; INDONESIAN THROUGHFLOW ; WEAKENING RELATIONSHIP ; MONSOON RAINFALL ; ENSO |
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/19889 |
专题 | 气候变化 |
作者单位 | 1.Second Inst Oceanog, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China; 2.Shanghai Jiao Tong Univ, Inst Oceanog, Shanghai, Peoples R China; 3.Univ Maryland, College Pk, MD 20742 USA; 4.Univ Northern British Columbia, Environm Sci & Engn, Prince George, BC, Canada |
推荐引用方式 GB/T 7714 | Zhou, Lei,Murtugudde, Raghu,Chen, Dake,et al. Seasonal and Interannual Variabilities of the Central Indian Ocean Mode[J]. JOURNAL OF CLIMATE,2017,30(16). |
APA | Zhou, Lei,Murtugudde, Raghu,Chen, Dake,&Tang, Youmin.(2017).Seasonal and Interannual Variabilities of the Central Indian Ocean Mode.JOURNAL OF CLIMATE,30(16). |
MLA | Zhou, Lei,et al."Seasonal and Interannual Variabilities of the Central Indian Ocean Mode".JOURNAL OF CLIMATE 30.16(2017). |
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