Resumo

CORTEZ, Miguel  e  MATSUMOTO, Jun. Intraseasonal changes in the regional circulation over Mexico. Invest. Geog [online]. 2001, n.46, pp.30-44. ISSN 2448-7279.

Intraseasonal changes in the regional circulation over Mexico are described by means of 5-day averaged data extracted from the operational analyses of the European Centre for Medium-range Weather Forecast (ECMWF). OLR fields are superimposed upon 200 hPa winds to illustrate features of the convective activity over the studied region. Changes in the low-level circulation over the Caribbean and the eastern North Pacific, explain variations in the evolution of the rainy season over Mexico. In the upper troposphere, the Mexican High, as delineated from the ECMWF data, develops rapidly in the eastern Pacific close to Guatemala during the onset phase of the rainy season in Central America and southern Mexico. The northward movement of this system is temporally and spatially consistent with the distribution of low OLR over Mexico.

Palavras-chave : OLR; convective activity; Mexican monsoon; Mexican high.

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