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- Frank, K. L.; Kalkstein, L. S.; Geils, B. W.; Thistle, H. W. Jr.
- International journal of biometeorology 2008 v.52 no.7 pp. 641
- meteorological parameters; meteorological data; atmospheric circulation; wind direction; geographical distribution; airborne microorganisms; rust diseases; algorithms; principal component analysis; cluster analysis; North America
- ... This study developed a methodology to temporally classify large scale, upper level atmospheric conditions over North America, utilizing a newly-developed upper level synoptic classification (ULSC). Four meteorological variables: geopotential height, specific humidity, and u- and v-wind components, at the 500 hPa level over North America were obtained from the NCEP/NCAR Reanalysis Project dataset f ...