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 (&gt;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.<br> Wright, David K. (<em>2022</em>) The evolutionary impacts of farming on African landscapes. <em>The Anthropocene Review</em> https://doi.org/10.1177/20530196221140145 <br> References<br> 1 Berger, A. &amp; Loutre, M. F. Insolation values for the climate of the last 10 million years. <em>Quaternary Science Reviews</em> <strong>10</strong>, 297-318 (1991). 2 Grant, K. M.<em> et al.</em> A 3 million year index for North African humidity/aridity and the implication of potential pan-African Humid periods. <em>Quaternary Science Reviews</em> <strong>171</strong>, 100-118 (2017). <br>