GSTDTAP  > 气候变化
DOI10.1175/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
ISSN0894-8755
EISSN1520-0442
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
被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
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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