Fig. 2: Orbital-scale trends of climate, weathering, and erosion in the tropical Western Pacific since 140 ka.
From: Late Pleistocene island weathering and precipitation in the Western Pacific Warm Pool
a Smectite/(illite+chlorite) ratios as a physical erosion indicator (this study; the curve shows a 13-point average of the original data). b Chemical weathering in core MD01-2385 (this study) inferred from Eu/Eu* = 2Eu/(Sm+Gd), where the element data are UCC-normalised87. c Chemical weathering in core MD01-2385 (this study) based on the chemical index of alteration (CIA), calculated from CIA = [Al2O3/(Al2O3+CaO*+Na2O + K2O)] × 100, where CaO* represents CaO associated with the silicate fraction88. Note the inverse scale for CIA. In (a–c), the simulated annual precipitation in the inferred source region for core MD01-2385 is also shown for comparison (black lines). d Stacked sea surface temperature (SST) from the Indo-Pacific Warm Pool (IPWP)29, and global sea level based on a global stack89. The dark grey dashed line denotes the general decline in sea level during the last glacial cycle. e Orbital parameters of precession (black solid line; inverse scale) and obliquity (blue dashed line)66. Precessional cycles are indicated, with light blue bars representing precession minima.
