Twentieth century changes in winter climatic regions

Robert C. Balling, Merlin P. Lawson

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The configuration of the northern hemispheric general atmospheric circulation system shifted from a zonal to a meridional pattern in the early 1950s. Winter climatic regions in the conterminous United States are developed for a ten year period dominated by zonal flow and a second decade of meridional flow using a combination of principal components factor analysis and a Euclidean distance clustering algorithm. The results demonstrate that regional patterns in the surface climatic data substantially changed as the circulation system shifted its basic configuration. The regional structures of the eastern United States and the Great Plains appeared to be particularly sensitive to the change in the upperlevel flow pattern.

Original languageEnglish (US)
Pages (from-to)57-69
Number of pages13
JournalClimatic Change
Issue number1
StatePublished - Mar 1 1982
Externally publishedYes

ASJC Scopus subject areas

  • Global and Planetary Change
  • Atmospheric Science


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