Skip to main content
Article
Classifying reanalysis surface temperature probability densityfunctions (PDFs) over North America with cluster analysis
Geophysical Research Letters
  • Paul C. Loikith, Portland State University
  • Benjamin R. Lintner, Rutgers University
  • Jinwon Kim, University of Califrornia, Los Angeles
  • Huikyo Lee, NASA Jet Propulsion Laboratory
Document Type
Article
Publication Date
7-26-2013
Abstract
An important step in projecting future climate change impacts on extremes involves quantifying the underlying probability distribution functions (PDFs) of climate variables. However, doing so can prove challenging when multiple models and large domains are considered. Here an approach to PDF quantification using k-means clustering is considered. A standard clustering algorithm (with k = 5 clusters) is applied to 33 years of daily January surface temperature from two state-of-the-art reanalysis products, the North American Regional Reanalysis and the Modern Era Retrospective Analysis for Research and Applications. The resulting cluster assignments yield spatially coherent patterns that can be broadly related to distinct climate regimes over North America, e.g., low variability over the tropical oceans or temperature advection across stronger or weaker gradients. This technique has the potential to be a useful and intuitive tool for evaluation of model-simulated PDF structure and could provide insight into projections of future changes in temperature.
Description

At the time of publication Paul C. Loikith was affiliated with the NASA Jet Propulsion Laboratory.

This work was authored as part of the Contributor's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.

DOI
10.1002/grl.50688
Persistent Identifier
http://archives.pdx.edu/ds/psu/17001
Citation Information
Loikith, P. C., Lintner, B. R., Kim, J., Lee, H., Neelin, J. D., & Waliser, D. E. (2013). Classifying reanalysis surface temperature probability density functions (PDFs) over North America with cluster analysis. Geophysical Research Letters, 40(14), 3710-3714.