Forrest Hoffman, Bill Hargrove, David Erickson, Bob Oglesby
June 26, 2001
A cluster analysis was performed on monthly averaged variables from the "Business As Usual" Parallel Climate Model (PCM) run on a T42 grid scale (2.825°) which spans January 1871 through December 2098 (2736 months). This analysis revealed a "hole" in the netCDF files containing the monthly averages of total cloudiness, precipitation, and surface temperature for the month of January, 2000. This "hole" was uncovered by the clustering algorithm which faithfully classified these data in a "outlier" cluster; see cluster 3 in the list of 64 Cluster Centroids including January 2000. The monthly averaged variables from before, during, and after January, 2000, can be seen in the data-hole image.
Eliminating January, 2000, the model output for the remaining 2735 months were used to produce animated visualizations of the three variables of interest.
WARNING: The MPEG movie files are very large and take a considerable amount of time to download. To quickly view the animations in a Web browser, select the Animated GIFs below.
A Multivariate Spatio-Temporal Cluster Analysis, specifying 32 clusters, was performed on the same variable for the entire period. Animated visualizations of the randomly colored clusters and "similarity colored" clusters were produced. To make sense of the "similarity colored" cluster movie, see the Color Legend.
WARNING: The MPEG movie files are very large and take a considerable amount of time to download. To quickly view the animations in a Web browser, select the Animated GIFs below.
For assistance or additional information, contact Forrest Hoffman
(forrest@climatemodeling.org)