AbstractThe Madden–Julian oscillation (MJO) is the dominant mode of variability in the tropical atmosphere on intraseasonal time scales and planetary spatial scales. Despite the primary importance of the MJO and the decades of research progress since its original discovery, a generally accepted theory for its essential mechanisms has remained elusive. In recent work by two of the authors, a minimal dynamical model has been proposed that recovers robustly the most fundamental MJO features of (i) a slow eastward speed of roughly 5 m s−1, (ii) a peculiar dispersion relation with dω/dk ≈ 0, and (iii) a horizontal quadrupole vortex structure. This model, the skeleton model, depicts the MJO as a neutrally stable atmospheric wave that involves a simple multiscale interaction between planetary dry dynamics, planetary lower-tropospheric moisture, and the planetary envelope of synoptic-scale activity. In this article, it is shown that the skeleton model can further account for (iv) the intermittent generation of MJ...
摘要麦登-朱利安涛动(MJO)是热带大气在季节内时间尺度和行星空间尺度上的主要变率模式。尽管MJO具有首要的重要性，并且自其最初发现以来已有数十年的研究进展，但一个普遍接受的关于其基本机制的理论仍然难以捉摸。在最近的工作中，两位作者提出了一个最小动力学模型，该模型稳健地恢复了(i)大约5 m s−1的缓慢东移速度，(ii)与ω/dk≈0的特殊色散关系，以及(iii)水平四极涡结构的最基本MJO特征。这个模式，即骨架模式，将MJO描述为一个中性稳定的大气波，涉及行星干动力、行星对流层低层湿度和行星天气尺度活动包络层之间的简单多尺度相互作用。在本文中，表明骨架模型可以进一步解释(iv) MJ的间歇性产生…
{"title":"A Stochastic Skeleton Model for the MJO","authors":"S. Thual, A. Majda, S. Stechmann","doi":"10.1175/JAS-D-13-0186.1","DOIUrl":"https://doi.org/10.1175/JAS-D-13-0186.1","url":null,"abstract":"AbstractThe Madden–Julian oscillation (MJO) is the dominant mode of variability in the tropical atmosphere on intraseasonal time scales and planetary spatial scales. Despite the primary importance of the MJO and the decades of research progress since its original discovery, a generally accepted theory for its essential mechanisms has remained elusive. In recent work by two of the authors, a minimal dynamical model has been proposed that recovers robustly the most fundamental MJO features of (i) a slow eastward speed of roughly 5 m s−1, (ii) a peculiar dispersion relation with dω/dk ≈ 0, and (iii) a horizontal quadrupole vortex structure. This model, the skeleton model, depicts the MJO as a neutrally stable atmospheric wave that involves a simple multiscale interaction between planetary dry dynamics, planetary lower-tropospheric moisture, and the planetary envelope of synoptic-scale activity. In this article, it is shown that the skeleton model can further account for (iv) the intermittent generation of MJ...","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128812726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1007/978-3-030-22247-5_7
A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual
{"title":"Current and Future Research Perspectives","authors":"A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual","doi":"10.1007/978-3-030-22247-5_7","DOIUrl":"https://doi.org/10.1007/978-3-030-22247-5_7","url":null,"abstract":"","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115115949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1007/978-3-030-22247-5_4
A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual
{"title":"Tropical–Extratropical Interactions and the MJO Skeleton Model","authors":"A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual","doi":"10.1007/978-3-030-22247-5_4","DOIUrl":"https://doi.org/10.1007/978-3-030-22247-5_4","url":null,"abstract":"","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133768946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1007/978-3-030-22247-5_6
A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual
{"title":"Refined Vertical Structure in the Stochastic Skeleton Model for the MJO","authors":"A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual","doi":"10.1007/978-3-030-22247-5_6","DOIUrl":"https://doi.org/10.1007/978-3-030-22247-5_6","url":null,"abstract":"","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116596004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1007/978-3-030-22247-5_2
A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual
{"title":"The Deterministic Skeleton Model and Observed Features of the MJO","authors":"A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual","doi":"10.1007/978-3-030-22247-5_2","DOIUrl":"https://doi.org/10.1007/978-3-030-22247-5_2","url":null,"abstract":"","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126195666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1007/978-3-030-22247-5_5
A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual
{"title":"New Indices for Observations of Tropical Variability Based on the Skeleton Model and a Model for the Walker Circulation","authors":"A. Majda, S. Stechmann, Shengqian Chen, H. R. Ogrosky, S. Thual","doi":"10.1007/978-3-030-22247-5_5","DOIUrl":"https://doi.org/10.1007/978-3-030-22247-5_5","url":null,"abstract":"","PeriodicalId":334628,"journal":{"name":"Tropical Intraseasonal Variability and the Stochastic Skeleton Method","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115407077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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