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Nino4 as a Key Region for the Interannual Variability of the Western Pacific Warm Pool
Jia, Fan1,2; Hu, Dunxin1,2; Hu, Shijian1,2; Feng, Junqiao1,2
2017-11-01
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号122期号:11页码:9299-9314
文章类型Article
摘要The Western Pacific Warm Pool (WPWP) plays an important role in the global climate through modulating deep convections, ENSO, monsoon onsets, etc. Due to the vast spatial range and huge heat storage of the WPWP, near-real-time monitoring of its three-dimensional variations remains challenging. Based on Argo observations and three reanalysis data sets, we find that the Nino4 sea surface temperature (SST) index captures the interannual variability of the WPWP well. The Nino4 SST can explain approximately half of the variance of the WPWP heat content and almost all the variance of the east-west migration of the WPWP. An assessment of 31 CMIP5 models also reveals that models with larger interannual spectral powers and amplitudes of the Nino4 SST tend to simulate larger variations in the heat content and east-west migration of the WPWP. A surface heat budget analysis further shows that the Nino4 SST and WPWP are physically connected through basin-scale horizontal advections of mean temperatures by anomalous horizontal currents, which dominate the interannual variations of both the Nino4 SST and WPWP. Our results indicate that the Nino4 SST can efficiently estimate the interannual WPWP changes and a reliable predictor of the onset time of the South China Sea summer monsoon and Bay of Bengal summer monsoon, without the need to calculate the eastern boundary location and heat content of the WPWP. Moreover, a better simulation of the SST and horizontal currents in the Nino4 region can help to reduce model bias when reproducing the WPWP's interannual variabilities.
关键词Western Pacific Warm Pool Nino4 Interannual Variability Cmip5 Models
DOI10.1002/2017JC013208
收录类别SCI
语种英语
WOS记录号WOS:000418089400052
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/154309
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
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Jia, Fan,Hu, Dunxin,Hu, Shijian,et al. Nino4 as a Key Region for the Interannual Variability of the Western Pacific Warm Pool[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2017,122(11):9299-9314.
APA Jia, Fan,Hu, Dunxin,Hu, Shijian,&Feng, Junqiao.(2017).Nino4 as a Key Region for the Interannual Variability of the Western Pacific Warm Pool.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,122(11),9299-9314.
MLA Jia, Fan,et al."Nino4 as a Key Region for the Interannual Variability of the Western Pacific Warm Pool".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 122.11(2017):9299-9314.
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