Bibliographic citations
Chancafe, A., (2018). Precipitaciones sobre la Sierra Central y el Sur del Perú asociado a circulaciones de escala sinóptica entre el 22 y 23 de marzo de 2015 [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/3742
Chancafe, A., Precipitaciones sobre la Sierra Central y el Sur del Perú asociado a circulaciones de escala sinóptica entre el 22 y 23 de marzo de 2015 []. PE: Universidad Nacional Agraria La Molina; 2018. https://hdl.handle.net/20.500.12996/3742
@misc{sunedu/3017020,
title = "Precipitaciones sobre la Sierra Central y el Sur del Perú asociado a circulaciones de escala sinóptica entre el 22 y 23 de marzo de 2015",
author = "Chancafe Alberca, Alex Jhoan",
publisher = "Universidad Nacional Agraria La Molina",
year = "2018"
}
In this document we analyzed an event occurred on march 22nd and 23rd, 2015 along the western slope of the central and southern Andes of Peru. Specifically, on San Juan de Lurigancho – Chosica, where landslides such huaycos and floods caused material and health damage. We analyzed the behavior of heavy rainfall in the western slopes of the Andes associated with a Cut Off Low (COL), one of the atmospheric mechanisms on synoptic level that joins all the ingredients necessary to generate heavy rainfall (León, 2003); in this document we used the term DANA, this one was developed on the southeast eastern Pacific, which was originated from a tropical cyclone in the western Pacific off the coast of Australia, advecting cyclonic vorticity in height, intensifying and moving a ridge from west to east by Rossby waves. The processes involved in the genesis of this system was analyzed using NCEP -NCAR reanalysis data with 1° lat/lon resolution, as well as ERA Interim. As part of the analysis, essential meteorological variables were evaluated in the funnel/basic dynamic method (high level divergence, low level convergence, moisture: PWAT, HR, SST, atmospheric stability: GDI, CAPE, and trigger: diurnal cycle (breeze) and surface fluxes), as well as others that allow us a better analysis the origin and the end of the event. The effect of this system in the heavy rainfall in the western Andes were described too, which exceeded 99th percentile considering extremely rainy days. Finally, we concluded that the causes of the extraordinary heavy rainfall on the center and south of Peru were: humidity advection towards the coasts of Peru, SST positive anomalies, atmospheric instability in the eastern Pacific, teleconnections with Rossby waves, convection and synoptic-scale circulations
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