Precipitation Variability and ENSO Relationships in the Tropical Andes of Southern Peru and Bolivia

Authors: Baker Perry*, Appalachian State University, Anton Seimon, Appalachian State University, Joseph A. Jonaitis, Appalachian State University, Evan E. Montpellier, Appalachian State University, Heather Guy, Appalachian State University, Ronald Winkelmann, Universidad Mayor de San Andres, Marcos Andrade, Universidad Mayor de San Andres, Maxwell Rado, Universidad Nacional de San Antonio del Abad de Cusco, Sandro Arias, Servicio Nacional de Meteorología e Hidrología
Topics: Climatology and Meteorology, Cryosphere, Mountain Environments
Keywords: Precipitation, ENSO, tropical Andes, Peru, Bolivia
Session Type: Paper
Day: 4/13/2018
Start / End Time: 3:20 PM / 5:00 PM
Room: Regent, Marriott, River Tower Elevators, 4th Floor
Presentation File: No File Uploaded


Precipitation variability and change in tropical high mountains have a fundamental influence on a variety of environmental processes, including glacier behavior, water resources, and the interpretation of paleoclimatic archives. This paper analyzes precipitation patterns in the tropical Andes of southern Peru and Bolivia using observations from manual stations operated by the respective National Meteorology and Hydrology Institutes of each country, new citizen science precipitation stations, new high elevation (> 5,150 m asl) comprehensive precipitation monitoring stations, annual snowpits from the accumulation zones of glaciers in the region, and a vertically-pointing radar. The 2015-16 strong El Niño event serves as an excellent case study to evaluate the spatiotemporal patterns of precipitation across the region and in particular to investigate the elevated melting layer heights and frequent occurrence of liquid precipitation at elevations above 5,000 m asl and associated impacts to glacierized tropical Andean cordilleras.

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