Figure 3
Summary of data for ODP core 1146 compared with similar data from sites proximate to, and on, the continent of Asia. Charts in the left panel summarise data north to south across East Asia. (a) and (b) δ13CTOC from transect sections on Chinese Loess Plateau (from northwest to southeast: Lantian, Yanyu)12, 18; (c) and (d) δ13Calk values from core 1146 since the last 3 Ma and since about 19 Ma (this study). The right panel summarises data from a far larger area. (e) δ13C values of PyC from core 1146 in this study; (f) and (g) δ13C values of black carbon from 1147/8 and δ13C values of PyC from Lingtai loess section16, 37; (h) and (i) marine sediments in Indian Ocean (ODP 717)62 and Bengal Fan (ODP 722)63; (j) Published pCO2 records since the mid-Miocene based on a compilation of CO2 curves (green line)59; (k) Simplified composite δ18O record of deep-sea benthic foraminifera as a proxy for global temperature variations65. Dashed line shows in enlarged form the record for δ13Calk in core 1146 since the last ~3 Ma. Solid line highlights the divergence of δ13C values occurring since the mid Quaternary. Arrows show direction of overall change in the data.
