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DOI | 10.1175/JCLI-D-18-0184.1 |
Distinct Mechanisms of Decadal Subsurface Heat Content Variations in the Eastern and Western Indian Ocean Modulated by Tropical Pacific SST | |
Jin, Xiaolin1; Kwon, Young-Oh2; Ummenhofer, Caroline C.2; Seo, Hyodae2; Kosaka, Yu3; Wright, Jonathon S.1 | |
2018-10-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:19页码:7751-7769 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Japan |
英文摘要 | Decadal variability of the subsurface ocean heat content (OHC) in the Indian Ocean is investigated using a coupled climate model experiment, in which observed eastern tropical Pacific sea surface temperature (EPSST) anomalies are specified. This study intends to understand the contributions of external forcing relative to those of internal variability associated with EPSST, as well as the mechanisms by which the Pacific impacts Indian Ocean OHC. Internally generated variations associated with EPSST dominate decadal variations in the subsurface Indian Ocean. Consistent with ocean reanalyses, the coupled model reproduces a pronounced east-west dipole structure in the southern tropical Indian Ocean and discontinuities in westward-propagating signals in the central Indian Ocean around 100 degrees E. This implies distinct mechanisms by which the Pacific impacts the eastern and western Indian Ocean on decadal time scales. Decadal variations of OHC in the eastern Indian Ocean are attributed to 1) western Pacific surface wind anomalies, which trigger oceanic Rossby waves propagating westward through the Indonesian Seas and influence Indonesian Throughflow transport, and 2) zonal wind anomalies over the central tropical Indian Ocean, which trigger eastward-propagating Kelvin waves. Decadal variations of OHC in the western Indian Ocean are linked to conditions in the Pacific via changes in the atmospheric Walker cell, which trigger anomalous wind stress curl and Ekman pumping in the central tropical Indian Ocean. Westward-propagating oceanic Rossby waves extend the influence of this anomalous Ekman pumping to the western Indian Ocean. |
英文关键词 | Air-sea interaction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441381000001 |
WOS关键词 | GLOBAL-WARMING HIATUS ; INDONESIAN THROUGHFLOW ; CLIMATE VARIABILITY ; EL-NINO ; SURFACE-TEMPERATURE ; SEA-LEVEL ; INTERANNUAL VARIABILITY ; NATURAL VARIABILITY ; EQUATORIAL PACIFIC ; OSCILLATION |
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/20243 |
专题 | 气候变化 |
作者单位 | 1.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China; 2.Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA; 3.Univ Tokyo, Res Ctr Adv Sci & Technol, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Jin, Xiaolin,Kwon, Young-Oh,Ummenhofer, Caroline C.,et al. Distinct Mechanisms of Decadal Subsurface Heat Content Variations in the Eastern and Western Indian Ocean Modulated by Tropical Pacific SST[J]. JOURNAL OF CLIMATE,2018,31(19):7751-7769. |
APA | Jin, Xiaolin,Kwon, Young-Oh,Ummenhofer, Caroline C.,Seo, Hyodae,Kosaka, Yu,&Wright, Jonathon S..(2018).Distinct Mechanisms of Decadal Subsurface Heat Content Variations in the Eastern and Western Indian Ocean Modulated by Tropical Pacific SST.JOURNAL OF CLIMATE,31(19),7751-7769. |
MLA | Jin, Xiaolin,et al."Distinct Mechanisms of Decadal Subsurface Heat Content Variations in the Eastern and Western Indian Ocean Modulated by Tropical Pacific SST".JOURNAL OF CLIMATE 31.19(2018):7751-7769. |
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