This work focuses on the analysis of spatial and temporal variability of precipitation in the central region of southern Central Argentina (SCA), a climate transition area which has experienced an important agricultural expansion. For this purpose, gauge station precipitation datasets available in the area were extensively used. The annual cycle shows a defined dry season (May–August) and wet season (September–April). Wet season represents over 85% of annual totals. A regionalization analysis of wet‐season precipitation suggests five subregions with spatially homogeneous precipitation variability in SCA. Three out the five subregions are located in central SCA. Conveniently devised precipitation indices for the latter subregions show the presence of significant precipitation jumps by the early 1970s, and to a minor extent, the mid‐1960s. Precipitation jumps are responsible for the observed long‐term trends in central SCA, which explain positive precipitation changes over 30–40% of regional averages in the period 1922–2012. The presence of stationary and non‐stationary components in SCA precipitation variability remotely connects the region mainly with variations in equatorial Pacific SSTs. The assessment of greenhouse gases concentration effects on future projections of wet‐season precipitation over central SCA is investigated by means of multi‐model analysis of historical experiment, and the representative concentration pathways 4.5 (RCP 4.5) and 8.5 (RCP 8.5), provided by the Coupled Model Intercomparison Project Phase 5. Results suggest an overall increased precipitation, roughly 15% respect to present climate, under most severe future scenario.
se caracterizan por la disponibilidad de arena fina sepultando antiguos acantilados. Las rampas de arena están condicionadas por los vientos del OSO, episódicamente afectados por vientos del sur. De la comparación de fotografías aéreas e imágenes satelitales se desprende que los ritmos de erosión son de 0,4 m/año con leve incremento en los últimos años. Si bien los vientos más frecuentes son registrados desde el N, los vientos en las playas dominan desde el OSO. Esto esta corroborado por ritmos de migración de las dunas litorales de 3 a 6 m/año, que a su vez afectan la migración de las desembocaduras. Perfiles de playa monitoreados en los bienios 2004-2005 y 2018-2019 indican que la mayor variabilidad se da en los sectores intermareales y en las rampas (transición entre la playa supralitoral y la duna litoral). Esta dinámica litoral-eólica condiciona las estrategias de forestación y urbanización en estas localidades balnearias con abundancia de arena.Palabras clave: dunas litorales, vientos del O,
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