K. R. Sperber1 and H. Annamalai2
1Program for Climate Model Diagnosis and Intercomparison
Livermore, CA 94550 USA
2International Pacific Research Center/SOEST
(January 2008, in press)
Movies of boreal summer intraseasonal variability based on regression of PC-4 with 20-100 day bandpass filtered outgoing longwave radiation for time lags from -25 to 25 days. The time lag is noted toward the upper-right of the movies. The regressions have been scaled by one standard deviation of the respective PC-4 time series to give units of Wm-2, with negative values corresponding to enhanced convection. Data has only been plotted where significant at the 5% level assuming each pentad is independent.
Acknowledgments. K. R. Sperber was supported under the auspices of the U.S. Department of Energy Office of Science, Climate Change Prediction Program by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. H. Annamalai was supported by a Department of Energy grant DE-FG02-07ER6445. The authors acknowledge the helpful comments of the reviewers, and we thank the Max Planck Institute for Meteorology and the German Climate Computer Centre for the ECHAM4/OPYC and ECHO-G model data provided through the Program for Climate Model Diagnosis and Intercomparison (PCMDI) CMIP2+ database. We acknowledge the modeling groups, the PCMDI, and the WCRP's Working Group on Coupled Modelling (WGCM) for their roles in making available the WCRP CMIP3 multi-model dataset. Support of this dataset is provided by the Office of Science, U.S. Department of Energy. We thank Charles Doutriaux and Velimir Mlaker for assistance in the preparation of the animations. UCRL-WEB-231245