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Author: search.filters.author.Jose Flores Rojas

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    Isla de calor urbana superficial en el área metropolitana de Cuzco
    (2021-02-25)
    La presente contribución estima la Intensidad de Isla de Calor Urbano superficial (SUHI) durante el periodo 2001 – 2016 para el Area Metropolitana de Cuzco (AMC), localizado en Perú en el departamento de Cuzco. Para cuantificar la SUHI, se usó 2 métodos: el primero es el método de Streutker y el segundo método propuesto por Jose Flores (método de cuantil). Donde se utilizó data de sensoramiento remoto de LST mensual y producto anual de tipo de cobertura de suelo (Land Cover Type) a 0.050 de resolución, obtenido del sensor MODIS a bordo del satélite TERRA y AQUA. En el AMC, en los periodos diurnos, el SUHI máximo muestra los valores máximos en marzo (4.6 C) y valores mínimos en julio (0.5 C) y la SUHI nocturnas presenta valores máximos en octubre (2.6 C) y valores mínimos en marzo (1.7 C) utilizando el método de cuantiles, ya que el área metropolitana de Cuzco no se ajusta a una superficie gaussiana.
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    Diagnosis of the extreme climate events of temperature and precipitation in Metropolitan Lima during 1965–2013
    (Multidisciplinary Digital Publishing Institute (Switzerland), 2022-08-01)
    The most extreme precipitation event in Metropolitan Lima (ML) occurred on 15 January 1970 (16 mm), this event caused serious damage, and the real vulnerability of this city was evidenced; the population is still not prepared to resist events of this nature. This research describes the local climate variability and extreme climate indices of temperature and precipitation. In addition, the most extreme precipitation event in ML is analyzed. Extreme climate indices were identified based on the methodology proposed by the Expert Team on Climate Change Detection and Indices (ETCCDI). Some extreme temperature indices highlight an initial trend toward warm conditions (1965–1998); this trend has changed towards cold conditions since 1999, consistent with the thermal cooling during the last two decades in ML (−0.5 °C/decade) and other coastal areas of Peru. The variations of extreme temperature indices are mainly modulated by sea-surface temperature (SST) alterations in the Niño 1 + 2 region (moderate to strong correlations were found). Extreme precipitation indices show trends toward wet conditions after the 1980s, the influence of the Pacific Ocean SST on the extreme precipitation indices in ML is weak and variable in sign. The most extreme precipitation event in ML is associated with a convergence process between moisture fluxes from the east (Amazon region) at high and mid levels and moisture fluxes from the west (Pacific Ocean) at low levels, and near the surface.
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