Paytan A, Kastner M, Chavez FP
A. Paytan and M. Kastner, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0212, USA. E-mail:
Science. 1996 Nov 22;274(5291):1355-7. doi: 10.1126/science.274.5291.1355.
An empirical correlation between marine barite (BaSO4) accumulation rate in core-top sediment samples from two equatorial Pacific transects (at 140°W and 110°W) and the estimated primary productivity of the overlying water column were used to evaluate glacial to interglacial changes in productivity. Fluctuations in barite accumulation rates down-core indicate that during glacial periods of the past 450,000 years, the productivity in the central and eastern equatorial Pacific was about two times that during intervening interglacial periods. This result is consistent with other evidence that productivity was high in the eastern and central equatorial Pacific during the last glacial.
利用来自赤道太平洋两个断面（西经140°和西经110°）岩芯顶部沉积物样本中海洋重晶石（BaSO₄）积累速率与上覆水柱估计初级生产力之间的经验相关性，来评估生产力从冰川期到间冰期的变化。岩芯中重晶石积累速率的波动表明，在过去45万年的冰川期，赤道太平洋中部和东部的生产力约为其间冰期的两倍。这一结果与其他证据一致，即末次冰期赤道太平洋东部和中部生产力较高。
