Distinct Evolution of the SST Anomalies in the Far Eastern Pacific between the 1997/98 and 2015/16 Extreme El Ni?os
文献类型：CNKI期刊论文
| 作者 | Shaolei TANG; Jing-Jia LUO; Lin CHEN; Yongqiang YU |
| 发表日期 | 2022-04-04 |
| 出处 | Advances in Atmospheric Sciences
 |
| 关键词 | El N?o–Southern Oscillation extreme El Ni?o El Ni?o diversity far eastern Pacific decadal climate variability |
| 英文摘要 | The 2015/16 El Ni?o displayed a distinct feature in the SST anomalies over the far eastern Pacific(FEP) compared to the 1997/98 extreme case. In contrast to the strong warm SST anomalies in the FEP in the 1997/98 event, the FEP warm SST anomalies in the 2015/16 El Ni?o were modest and accompanied by strong southeasterly wind anomalies in the southeastern Pacific. Exploring possible underlying causes of this distinct difference in the FEP may improve understanding of the diversity of extreme El Ni?os. Here, we employ observational analyses and numerical model experiments to tackle this issue. Mixed-layer heat budget analysis suggests that compared to the 1997/98 event, the modest FEP SST warming in the 2015/16 event was closely related to strong vertical upwelling, strong westward current, and enhanced surface evaporation, which were caused by the strong southeasterly wind anomalies in the southeastern Pacific.The strong southeasterly wind anomalies were initially triggered by the combined effects of warm SST anomalies in the equatorial central and eastern Pacific(CEP) and cold SST anomalies in the southeastern subtropical Pacific in the antecedent winter, and then sustained by the warm SST anomalies over the northeastern subtropical Pacific and CEP. In contrast, southeasterly wind anomalies in the 1997/98 El Ni?o were partly restrained by strong anomalously negative sea level pressure and northwesterlies in the northeast flank of the related anomalous cyclone in the subtropical South Pacific.In addition, the strong southeasterly wind and modest SST anomalies in the 2015/16 El Ni?o may also have been partly related to decadal climate variability. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | jointly supported by National Natural Science Foundation of China (Grant No. 42030605) ; National Key Research and Development Program of China (Grant No. 2019YFC1510004) ; National Natural Science Foundation of China (Grant Nos. 42088101 and 42005020) ; the General Program of Natural Science Research of Jiangsu Higher Education Institutions (19KJB170019) ; the Natural Science Foundation of Jiangsu Province (Grant No. BK20190781) |
| 卷 | v.39期:06页:111-126 |
| 语种 | 英文; |
| 分类号 | P732;P731.11 |
| ISSN号 | 0256-1530 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187462]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofMeteorologicalDisaster,MinistryofEducation(KLME)/ILCEC/CIC-FEMD,NanjingUniversityofInformationScienceandTechnology 2.UniversityofChineseAcademyofSciences 3.CenterforOceanMega-Science,ChineseAcademyofSciences 4.InstituteforClimateandApplicationResearch(ICAR),NanjingUniversityofInformationScienceandTechnology 5.StateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG),InstituteofAtmosphericPhysics,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Shaolei TANG,Jing-Jia LUO,Lin CHEN,et al. Distinct Evolution of the SST Anomalies in the Far Eastern Pacific between the 1997/98 and 2015/16 Extreme El Ni?os. 2022. |
入库方式： OAI收割
来源：海洋研究所
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