Bibliographic citations
León, K., (2014). Análisis espacio-temporal de las precipitaciones y caudales durante los eventos El Niño (1982-83 y 1997-98) en la costa norte peruana [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/1866
León, K., Análisis espacio-temporal de las precipitaciones y caudales durante los eventos El Niño (1982-83 y 1997-98) en la costa norte peruana [Tesis]. : Universidad Nacional Agraria La Molina; 2014. https://hdl.handle.net/20.500.12996/1866
@misc{sunedu/3012402,
title = "Análisis espacio-temporal de las precipitaciones y caudales durante los eventos El Niño (1982-83 y 1997-98) en la costa norte peruana",
author = "León Altuna, Karen Beatriz",
publisher = "Universidad Nacional Agraria La Molina",
year = "2014"
}
In this work, we have studied the temporal and spatial rainfall variability on interannual scale (period 1963-2009) and later on a daily scale during the extraordinary El Niño events of 1982-1983 and 1997-1998, in the regions of Tumbes and Piura. Regionalized precipitation obtained from Regional Vector Method (RVM) and ten extreme precipitation indices were calculated, which were related to different types of El Niño associated with the anomalies of sea surface temperature in the Central Equatorial Pacific (CP) and Eastern Equatorial Pacific (EP). As a result, two climatic regions were obtained: the coastal region (below 500 m) and the Andean region (above 1000 m), where rainfall is mainly related to warming of the EP and cooling of the CP, respectively. Between 500 and 1000 m above sea level no information was collected. Subsequently, daily rainfall patterns obtained by Principal Component Analysis were related to discharges and atmospheric circulation. The results according to the second principal component showed two climatic regions similar to the ones found by the RVM in which, during El Niño events, a spatial pattern that opposes rainfall in both regions is presented. It was also identified that heavy rainfall during extreme El Niño events occurs due to the western winds anomalies that drive the approximation of convective activity (from 140 °W) to the Peruvian north coast (80 °W). This displacement was found to occur faster during the El Niño 1982-83. These patterns are important to explain the causes of extreme precipitation during El Niño on the northern coast of Peru.
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