Simplified Metrics for the Identification of the Madden-Julian Oscillation in Models

TitleSimplified Metrics for the Identification of the Madden-Julian Oscillation in Models
Publication TypeJournal Article
Year of Publication2012
AuthorsSperber, Kenneth R., and Kim Daehyun
JournalAtmospheric Science Letters
Volume13
Pages187-193
Date Published04/27/2012
Abstract

We propose simplified metrics to evaluate the fidelity with which the Madden-Julian oscillation (MJO) is simulated in climate models. These metrics are based on lag correlation analysis of principal component time series (PC’s). The PC’s are obtained by projecting simulated 20-100 day bandpass filtered daily outgoing longwave radiation onto the two leading empirical orthogonal functions of observed MJO variability. The simplified MJO metrics, the maximum positive correlation and time lag at which it occurs, provide consistent information relative to more complex diagnostics developed by the Madden-Julian Oscillation Working Group (CLIVAR MJOWG, 2009; Kim et al., 2009).

URLhttp://onlinelibrary.wiley.com/doi/10.1002/asl.378/full
DOI10.1002/asl.378
Journal: Atmospheric Science Letters
Volume: 13

We propose simplified metrics to evaluate the fidelity with which the Madden-Julian oscillation (MJO) is simulated in climate models. These metrics are based on lag correlation analysis of principal component time series (PC’s). The PC’s are obtained by projecting simulated 20-100 day bandpass filtered daily outgoing longwave radiation onto the two leading empirical orthogonal functions of observed MJO variability. The simplified MJO metrics, the maximum positive correlation and time lag at which it occurs, provide consistent information relative to more complex diagnostics developed by the Madden-Julian Oscillation Working Group (CLIVAR MJOWG, 2009; Kim et al., 2009).

DOI: 10.1002/asl.378
Year of Publication: 2012
Citation:
Sperber, KR, and D Kim.  2012.  "Simplified Metrics for the Identification of the Madden-Julian Oscillation in Models."  Atmospheric Science Letters 13: 187-193, doi:10.1002/asl.378.