NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Changes in the Structure and Propagation of the MJO with Increasing CO2Changes in the Madden-Julian Oscillation (MJO) with increasing CO2 concentrations are examined using the Goddard Institute for Space Studies Global Climate Model (GCM). Four simulations performed with fixed CO2 concentrations of 0.5, 1, 2 and 4 times pre-industrial levels using the GCM coupled with a mixed layer ocean model are analyzed in terms of the basic state, rainfall and moisture variability, and the structure and propagation of the MJO.The GCM simulates basic state changes associated with increasing CO2 that are consistent with results from earlier studies: column water vapor increases at approximately 7.1% K(exp -1), precipitation also increases but at a lower rate (approximately 3% K(exp -1)), and column relative humidity shows little change. Moisture and rainfall variability intensify with warming. Total moisture and rainfall variability increases at a rate that is similar to that of the mean state change. The intensification is faster in the MJO-related anomalies than in the total anomalies, though the ratio of the MJO band variability to its westward counterpart increases at a much slower rate. On the basis of linear regression analysis and space-time spectral analysis, it is found that the MJO exhibits faster eastward propagation, faster westward energy dispersion, a larger zonal scale and deeper vertical structure in warmer climates.
Document ID
20170005574
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Adames, Angel F.
(Princeton Univ. NJ, United States)
Kim, Daehyun
(Washington Univ. Seattle, WA, United States)
Sobel, Adam H.
(Lamont-Doherty Earth Observatory Palisades, NY, United States)
Del Genio, Anthony
(NASA Goddard Inst. for Space Studies New York, NY United States)
Wu, Jingbo
(Lamont-Doherty Earth Observatory Palisades, NY, United States)
Date Acquired
June 14, 2017
Publication Date
May 8, 2017
Publication Information
Publisher: Wiley
e-ISSN: 1942-2466
Subject Category
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN43192
Funding Number(s)
CONTRACT_GRANT: NNX13AM18G
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available