Figure 2: Great Basin paleoclimate record.
From: Orbital control of western North America atmospheric circulation and climate over two glacial cycles
High-resolution δ18O time series (top) and precise U-series ages±two sigma (bottom) from Nevada Cave stalagmites LC-1 (blue), PC-1 (red), LMC-14 (magenta), LC-2 of ref. 25 (orange) and LMC-21 (Green). Numbers along top indicate Marine Isotope Stages. The data are normalized for site latitude and corrected for changes in ocean δ18O. The δ18O-GB time series shows a saw-tooth structure over the last two glacial cycles that is interpreted as a paleotemperature and moisture source δ18O proxy for southwestern North America that varies on orbital time scales. Black line is a 750-year running average to emphasize trends.
