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DOI10.1175/JCLI-D-17-0654.1
Influences of Pacific Climate Variability on Decadal Subsurface Ocean Heat Content Variations in the Indian Ocean
Jin, Xiaolin1; Kwon, Young-Oh2; Ummenhofer, Caroline C.2; Seo, Hyodae2; Schwarzkopf, Franziska U.3; Biastoch, Arne3; Boening, Claus W.3; Wright, Jonathon S.1
2018-05-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:10页码:4157-4174
文章类型Article
语种英语
国家Peoples R China; USA; Germany
英文摘要

Decadal variabilities in Indian Ocean subsurface ocean heat content (OHC; 50-300 m) since the 1950s are examined using ocean reanalyses. This study elaborates on how Pacific variability modulates the Indian Ocean on decadal time scales through both oceanic and atmospheric pathways. High correlations between OHC and thermocline depth variations across the entire Indian Ocean Basin suggest that OHC variability is primarily driven by thermocline fluctuations. The spatial pattern of the leading mode of decadal Indian Ocean OHC variability closely matches the regression pattern of OHC on the interdecadal Pacific oscillation (IPO), emphasizing the role of the Pacific Ocean in determining Indian Ocean OHC decadal variability. Further analyses identify different mechanisms by which the Pacific influences the eastern and western Indian Ocean. IPO-related anomalies from the Pacific propagate mainly through oceanic pathways in the Maritime Continent to impact the eastern Indian Ocean. By contrast, in the western Indian Ocean, the IPO induces wind-driven Ekman pumping in the central Indian Ocean via the atmospheric bridge, which in turn modifies conditions in the southwestern Indian Ocean via westward-propagating Rossby waves. To confirm this, a linear Rossby wave model is forced with wind stresses and eastern boundary conditions based on reanalyses. This linear model skillfully reproduces observed sea surface height anomalies and highlights both the oceanic connection in the eastern Indian Ocean and the role of wind-driven Ekman pumping in the west. These findings are also reproduced by OGCM hindcast experiments forced by interannual atmospheric boundary conditions applied only over the Pacific and Indian Oceans, respectively.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000431102200003
WOS关键词AIR-SEA INTERACTION ; INDONESIAN THROUGHFLOW ; WARMING HIATUS ; ROSSBY WAVES ; EL-NINO ; REANALYSIS PROJECT ; ATMOSPHERIC BRIDGE ; MONSOON RAINFALL ; SURFACE ; TEMPERATURE
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/20360
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.GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany
推荐引用方式
GB/T 7714
Jin, Xiaolin,Kwon, Young-Oh,Ummenhofer, Caroline C.,et al. Influences of Pacific Climate Variability on Decadal Subsurface Ocean Heat Content Variations in the Indian Ocean[J]. JOURNAL OF CLIMATE,2018,31(10):4157-4174.
APA Jin, Xiaolin.,Kwon, Young-Oh.,Ummenhofer, Caroline C..,Seo, Hyodae.,Schwarzkopf, Franziska U..,...&Wright, Jonathon S..(2018).Influences of Pacific Climate Variability on Decadal Subsurface Ocean Heat Content Variations in the Indian Ocean.JOURNAL OF CLIMATE,31(10),4157-4174.
MLA Jin, Xiaolin,et al."Influences of Pacific Climate Variability on Decadal Subsurface Ocean Heat Content Variations in the Indian Ocean".JOURNAL OF CLIMATE 31.10(2018):4157-4174.
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