Fourier analysis of Central American rainfall
Tóm tắt
The annual variation of rainfall at 131 stations distributed all over Central America is subjected to harmonic analysis. Maps present the total variance of the mean monthly rainfall, the percentage variance of the first three harmonics, the residual contributed by the higher harmonics, the amplitudes and phase angles of the first three harmonics, and the ratio of the amplitudes of the first to te second harmonics. Annual rainfall curves are in most areas adequately reproduced by the first three harmonics. The various maps illustrate the marked regional contrasts between the Caribbean and the Pacific sides of the Isthmus and portray in particular the regional distribution of the secondary precipitation minimum around the middle of the rainy season. This quantitative description supplements an earlier study of rainfall distribution and regime in Central America.
Tài liệu tham khảo
Agricultural Department of British Honduras: Monthly Rainfall Returns. Central Farm, British Honduras (1961).
Conrad, V., andL. W. Pollak: Methods in Climatology. Cambridge, Mass., 1950.
Dirección de Estadística y Censo, Panamá: Estadistica Panameña, año 1963, Serie L, Meteorologia, Panama, 1964.
Fitzpatrick, E.: Seasonal Distribution of Rainfall in Australia Analised by Fourier Methods. Archiv Met. Geoph. Biokl., B,13, 270–285 (1964).
Fitzpatrick, E., D. Hart, andH. C. Brookfield: Rainfall Seasonality in the Tropical Southwest Pacific. Erdkunde,20, 181–194 (1966).
Hastenrath, S.: Rainfall Dristribution and Regime in Central America. Archiv Met. Geoph. Biokl., B,15, 201–241 (1967).
Horn, L., andR. Bryson: Harmonic Analysis of the Annual March of Precipitation over the United States. Anals Assoc. Amer. Geogr.50, 157–171 (1960).
Lettau, K., andF. White: Fourier Analysis of India Rainfall. Indian J. Meteor. Geophys.15, 27–38 (1964).
Panofsky H., andG. W. Brier: Some Applications of Statistics to Meteorology. University Park, Pa., 1958.
Sabbagh, M. E., andR. Bryson: Aspects of the Precipitation Climatology of Canada Investigated by the Method of Harmonic Analysis. Annals Assoc. Amer. Geogr.,52, 426–440 (1962).
Servicio Meteorológico Nacional de Costa Rica: Boletín meteorológico, año 1960. San José, Costa Rica, 1961.
Servicio Meteorológico Nacional de El Salvador: Almanaque Salvadoreño 1963. San Salvador, 1962.
Servicio Meteorológico Nacional de Hondruras: Almanaque Hondureño. Tegucigalpa, Honduras, 1962.
Steinhauser, F.: Über den Tagesgang des Niederschlags. Archiv Met. Geoph. Biokl. B,14, 1–35 (1966).
Wernstedt, F.: World Climatic Data, Latin America and the Caribbean. Pennsylvania State University, 1961.