Extended Data Fig. 7: Comparison of GDGT distributions in suspended particulate matter (SPM) of modern-day Lake Chala and in sediments covering the last ca 75 kyr.
From: Reversed Holocene temperature–moisture relationship in the Horn of Africa
a, Principal component analysis (PCA) biplot showing PC1 and PC2 of the fractional abundances of brGDGTs in SPM collected monthly between September 2013 and January 2015 from surface water and 11 discrete depth intervals between 10 m and 80 m. Data from previously published study21, with PC scores of individual samples coloured according to water depth. b, PC1 and PC2 resulting from PCA of the fractional abundances of brGDGTs in the studied portion of the DeepCHALLA sediment sequence, excluding 23 samples which partly consist of thin turbidites (Methods), and with individual samples coloured according to age, using the Marine Isotope Stage (MIS) boundaries as reference.
