Citas bibligráficas
Rojas, I., (2023). Impacto del ENSO en el retroceso glaciar en la Cordillera Blanca y la Isla Rey Jorge (Península Antártica) [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/5979
Rojas, I., Impacto del ENSO en el retroceso glaciar en la Cordillera Blanca y la Isla Rey Jorge (Península Antártica) []. PE: Universidad Nacional Agraria La Molina; 2023. https://hdl.handle.net/20.500.12996/5979
@mastersthesis{renati/1114395,
title = "Impacto del ENSO en el retroceso glaciar en la Cordillera Blanca y la Isla Rey Jorge (Península Antártica)",
author = "Rojas Macedo, Ibeth Celia",
publisher = "Universidad Nacional Agraria La Molina",
year = "2023"
}
The El Niño Southern Oscillation – ENSO has global impacts of great importance, a fact in which lies the need to understand its impacts. It is worldwide responsible for interannual variability in many places. Peru is one of the countries in which its impacts have been clearly evidenced and other places such as King George Island (IRJ) still require further studies to have a better understanding of its repercussions. The present study aims to determine the ENSO impacts´s on glacier coverage in the King George Island (Antarctic Peninsula) and the Cordillera Blanca (Shallap creek); for which Landsat images with spatial resolution of 30 m were used from 1988 to 2019; as well as meteorological information (temperatura and precipitation) for the analysis of teleconnections. The IRJ lost 10 percent of its glacier coverage since 1989, being mainly smaller and marine-terminating glaciers the most affected. The teleconnection assessment shows heterogeneous responses during El Niño years, regardless they are events with the same classification; similarly during La Niña years. Thus, El Niño 1997/98 was characterized by an increase in air temperatura; conversely, El Niño 2015/16 where it presented colder conditions in the IRJ. It is important to mention that the mass balance can be negative during an El Niño event due to basal melting. Additionally, a cooling period was found between 2007-2015/2016 in the IRJ. Regarding the Cordillera Blanca; Shallap Glacier and surrounding glaciers have shrunk by 35 percent from their glacier coverage in 1988; while an analysis of the Shallap Glacier alone records a 17 percent loss of glacier cover for the same period. The teleconnection assessment demonstrate that during El Niño/La Niña phenomenon, temperatures increase/decrease and greater/lesser (if not, it remains in balance) glacier coverage loss.
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