Climatic Characterization and Analysis of Mechanisms Modulating September-October Rainfall Decreases in the Caribbean Slope of Central America
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| Autores: | , , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2024 |
| Descripción: | [Introduction]: The Caribbean slope of Central America is located windward of the trade winds associated with the North Atlantic Subtropical High. The region exhibits rainfall bimodal annual patterns, with a relative minimum occurring in September and October. [Objective]: The study aims to characterize the observed decrease in rainfall during this two-month period. For each event, the variables associated with the onset day, minimum day, demise day, duration, intensity, and magnitude were estimated for the period of 1979-2010. [Methodology]: A set of 31 daily records from rain gauge stations was used. The months from July to November were examined in each station to identify the values of minimum, date of the minimum, onset, demise, duration, and intensity. The study explored the occurrence of any temporal or spatial trend in these characteristics of the events. Finally, different climatic indices and documentary sources were reviewed to identify the possible synoptic causes of the strongest decreases in rainfall. [Results]: The analysis revealed that the events began around September 3rd, with a minimum on September 23rd and an end on October 12th, with an approximate duration of 39 days. Events tend to occur earlier at stations located northwest of the isthmus. The driest events occurred under favorable conditions for the occurrence of winds with a southwest-west component over the region. [Conclusions]: Knowledge about these characteristics of precipitation helps in the activity planning of key socioeconomic sectors in Central America in case of adverse hydrometeorological events. |
| País: | Portal de Revistas UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Portal de Revistas UNA |
| Lenguaje: | Español |
| OAI Identifier: | oai:ojs.www.una.ac.cr:article/19162 |
| Acceso en línea: | https://www.revistas.una.ac.cr/index.php/ambientales/article/view/19162 |
| Palabra clave: | Climatology; impacts; intra-American seas; precipitation; climate variability Climatología; impactos; mares Intra-Americanos; precipitación; variabilidad climática mares intra-americanos; precipitação; variabilidade climática |