Fig. 4: Cosmogenic radionuclide concentrations and climate datasets.
From: Milankovitch-paced erosion in the southern Central Andes
a Global compilation of benthic δ18O values51 (VDPB, the Vienna Pee-Dee belemnite standard) and b mean austral summer insolation (Dec.-Mar.) calculated at the 23°S latitude of the RÃo Iruya study area83. c 10Be and d 26Al paleo-erosion concentrations (NE - i.e., corrected for exhumation, decay, and burial components) (2σ errors are contained within the black circles for 10Be) on reversed axes where decreasing concentration is indicative of increasing erosion rate, assuming a constant mean catchment-production rate. e Modeled mean annual precipitation rate for the RÃo Iruya region (taking the grid box that covers the region of interest, i.e., from 116.4–65°W and 30-20°S) derived from the CLIMBER-2 model with f the Gaussian-filtered 23-kyr (magenta), 41-kyr (green), and 400-kyr (black) CLIMBER-2 precipitation components. Note: the 400-kyr eccentricity curve is shown in light gray and repeated across all panels for reference. N.H. = Northern Hemisphere; DZs = detrital zircons; ENSO = El Niño Southern Oscillation; Obl. = obliquity; Prec. = precession.
