Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0923.1 |
Factors Determining the Asymmetry of ENSO | |
Liang, Jin1,2; Yang, Xiu-Qun1,2; Sun, De-Zheng3 | |
2017-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | A fundamental aspect of the observed ENSO is the positive asymmetry between its two phases: the strongest El Nino is stronger than the strongest La Nina. The nonlinear term in the equation for the surface ocean heat budget has been theorized as a cause of the asymmetry. This theory is challenged by the diversity of asymmetry among the CMIP5 models: these models all employ primitive equations and thus have the nonlinear term in the heat budget equation for the ocean surface, yet the asymmetry simulated by these models ranges from significantly negative to significantly positive. Here, the authors employ an analytical but nonlinear model-a model that simulates the observed ENSO asymmetry-to show that the nonlinear heating term does not guarantee the oscillation in the system to possess positive asymmetry. Rather, the system can have regimes with negative, zero, and positive asymmetry. The regime in which the system finds itself depends on a multitude of physical parameters. Moreover, the range of certain physical parameters for the system to fall in the regime with positive asymmetry in the oscillation is rather narrow, underscoring the difficulty of simulating the observed ENSO asymmetry by CMIP5 models. Moreover, stronger positive asymmetry is found to be associated with a more complicated oscillation pattern: the two adjacent strongest warm events are spaced farther apart and more small events occur in between. These results deepen the understanding of factors that are behind the asymmetry of ENSO and offer paths to take to improve model-simulated ENSO asymmetry. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406040200002 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; 1997-98 EL-NINO ; LA-NINA ; EQUATORIAL PACIFIC ; CMIP5 MODELS ; NONLINEARITY ; AMPLITUDE ; EVENTS |
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/21262 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, China Meteorol Adm Nanjing Univ Joint Lab Climate, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China; 3.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Liang, Jin,Yang, Xiu-Qun,Sun, De-Zheng. Factors Determining the Asymmetry of ENSO[J]. JOURNAL OF CLIMATE,2017,30(16). |
APA | Liang, Jin,Yang, Xiu-Qun,&Sun, De-Zheng.(2017).Factors Determining the Asymmetry of ENSO.JOURNAL OF CLIMATE,30(16). |
MLA | Liang, Jin,et al."Factors Determining the Asymmetry of ENSO".JOURNAL OF CLIMATE 30.16(2017). |
条目包含的文件 | 条目无相关文件。 |
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