Rainfall in the central Andes associated with the South American Monsoon and the South
American Low-Level Jet results from orographic effects on atmospheric circulation exerted
by the Andean Plateau and the Eastern Cordillera. However, despite its importance for
South American climate, no reliable records exist that allow decoding the evolution of
thresholds and interactions between Andean topography and atmospheric circulation,
especially regarding the onset of humid conditions in the inherently dry southern central …