African Humid Period orbital vs. humidity indexes

The data were processed using a bivariate bagplot run on 3000-year running averages over 3 Myr of orbital precession (Berger and Loutre 1991) vs. a northern African humidity index (Grant et al 2017) in aplpack in R. Values outside the fence (>2.5-σ) are classified as outliers. Cook’s Standard Distance run of 3000-yr running averages over 3 Myr of orbital precession(Berger and Loutre 1991) vs. a northern African humidity index (Grant et al 2017) in carData in R. Wright, David K. (2022) The evolutionary impacts of farming on African landscapes. The Anthropocene Review https://doi.org/10.1177/20530196221140145 References 1 Berger, A. & Loutre, M. F. Insolation values for the climate of the last 10 million years. Quaternary Science Reviews 10, 297-318 (1991). 2 Grant, K. M. et al. A 3 million year index for North African humidity/aridity and the implication of potential pan-African Humid periods. Quaternary Science Reviews 171, 100-118 (2017).