Stable isotope record of bentic foraminifera in sediment cores of the eastern Pacific, supplement to: Mix, Alan C; Pisias, Nicklas G; Zahn, Rainer; Rugh, W D; Lopez, C; Nelson, K (1991): Carbon 13 in Pacific deep and intermediate waters, 0-370 ka: implications for ocean circulation and Pleistocene CO2. Paleoceanography, 6(2), 205-226

Alan C Mix, Nicklas G Pisias, Rainer Zahn, W D Rugh, C Lopez & K Nelson
Stable isotopes in benthic foraminifera from Pacific sediments are used to assess hypotheses of systematic shifts in the depth distribution of oceanic nutrients and carbon during the ice ages. The carbon isotope differences between ~1400 and ~3200 m depth in the eastern Pacific are consistently greater in glacial than interglacial maxima over the last ~370 kyr. This phenomenon of "bottom heavy" glacial nutrient distributions, which Boyle proposed as a cause of Pleistocene CO2 change, occurs...
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