Exploring the Phase-Strength Asymmetry of the North Atlantic Oscillation Using Conditional Nonlinear Optimal Perturbation
文献类型：期刊论文
| 作者 | Jiang Zhina; Wang Xin; Wang Donghai |
| 刊名 | ADVANCES IN ATMOSPHERIC SCIENCES
 |
| 出版日期 | 2015 |
| 卷号 | 32期号:5页码:671-679 |
| 关键词 | North Atlantic Oscillation asymmetry optimization problem |
| 通讯作者 | jzn@cams.cma.gov.cn |
| 中文摘要 | Negative-phase North Atlantic Oscillation (NAO) events are generally stronger than positive-phase ones, i.e., there is a phase-strength asymmetry of the NAO. In this work, we explore this asymmetry of the NAO using the conditional nonlinear optimal perturbation (CNOP) method with a three-level global quasi-geostrophic spectral model. It is shown that, with winter climatological flow forcing, the CNOP method identifies the perturbations triggering the strongest NAO event under a given initial constraint. Meanwhile, the phase-strength asymmetry characteristics of the NAO can be revealed. By comparing with linear results, we find that the process of perturbation self-interaction promotes the onset of negative NAO events, which is much stronger than during positive NAO onset. Results are obtained separately using the climatological and zonal-mean flows in boreal winter (December-February) 1979-2006 as the initial basic state. We conclude, based on the fact that NAO onset is a nonlinear initial-value problem, that phase-strength asymmetry is an intrinsic characteristic of the NAO. |
| 学科主题 | Meteorology & Atmospheric Sciences |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/14985]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Jiang Zhina,Wang Xin,Wang Donghai. Exploring the Phase-Strength Asymmetry of the North Atlantic Oscillation Using Conditional Nonlinear Optimal Perturbation[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2015,32(5):671-679. |
| APA | Jiang Zhina,Wang Xin,&Wang Donghai.(2015).Exploring the Phase-Strength Asymmetry of the North Atlantic Oscillation Using Conditional Nonlinear Optimal Perturbation.ADVANCES IN ATMOSPHERIC SCIENCES,32(5),671-679. |
| MLA | Jiang Zhina,et al."Exploring the Phase-Strength Asymmetry of the North Atlantic Oscillation Using Conditional Nonlinear Optimal Perturbation".ADVANCES IN ATMOSPHERIC SCIENCES 32.5(2015):671-679. |
入库方式： OAI收割
来源：南海海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。