Simplified metrics for the identification of the Madden–Julian oscillation in models

Articles:

Title:: Simplified metrics for the identification of the Madden–Julian oscillation in models
Author(s):: Sperber, Kenneth R.
Kim, Daehyun
Date:: 2012
Type:: Articles
Department:: Lamont-Doherty Earth Observatory
Volume:: 13
Permanent URL:: http://hdl.handle.net/10022/AC:P:14403
Book/Journal Title:: Atmospheric Science Letters
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 (PCs). The PCs 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) and by Kim et al.
Subject(s):: Atmospheric sciences
DOI:: http://dx.doi.org/10.1002/asl.378