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Cloud variability as revealed in outgoing infrared spectra: Comparing model to observation with spectral EOF analysis

Huang, Xianglei and Farrara, John and Leroy, Stephen S. and Yung, Yuk L. and Goody, Richard M. (2002) Cloud variability as revealed in outgoing infrared spectra: Comparing model to observation with spectral EOF analysis. Geophysical Research Letters, 29 (8). Art. No. 1270. ISSN 0094-8276. doi:10.1029/2001GL014176. https://resolver.caltech.edu/CaltechAUTHORS:20140820-151655637

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Abstract

Spectrally resolved outgoing radiance is a potentially powerful tool for testing climate models. To show how it can be used to evaluate the simulation of cloud variability, which is the principal uncertainty in current climate models, we apply spectral empirical orthogonal function (EOF) analysis to satellite radiance spectra and synthetic spectra derived from a general circulation model (GCM). We show that proper averaging over a correct timescale is necessary before applying spectral EOF analysis. This study focuses on the Central Pacific and the western Pacific Warm Pool. For both observation and GCM output, cloud variability is the dominant contributor to the first principal component that accounts for more than 95% of the total variance. However, the amplitude of the first principal component derived from the observations (2 ∼ 3.4 W m^(−2)) is 2 ∼ 6 times greater than that of the GCM simulation. This suggests that cloud variability in the GCM is significantly smaller than that in the real atmosphere.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2001GL014176DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/2001GL014176/abstractPublisherArticle
ORCID:
AuthorORCID
Yung, Yuk L.0000-0002-4263-2562
Additional Information:© 2002 The American Geophysical Union. Received 3 October 2001; Revised 8 January 2002; Accepted 16 January 2002; Published 30 April 2002. We thank A. Ingersoll, M. Gerstell, G. Toon and R. Zurek for valuable comments. We wish to thank two anonymous referees for improving the paper. This research is supported by NOAA grant Grant No. NA06EC0505 to the California Institute of Technology.
Funders:
Funding AgencyGrant Number
National Oceanic and Atmospheric Administration (NOAA)NA06EC0505
Issue or Number:8
DOI:10.1029/2001GL014176
Record Number:CaltechAUTHORS:20140820-151655637
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140820-151655637
Official Citation:Huang, X., Farrara, J., Leroy, S. S., Yung, Y. L., & Goody, R. M. (2002). Cloud variability as revealed in outgoing infrared spectra: Comparing model to observation with spectral EOF analysis. Geophysical Research Letters, 29(8), 111-111-111-114. doi: 10.1029/2001gl014176
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48746
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:20 Aug 2014 22:40
Last Modified:10 Nov 2021 18:35

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