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碳酸钙的保存与溶解(即碳酸钙泵)通过其缓冲器效应控制着世界大洋的酸碱度,进而可能对全球大气CO2浓度的变化起着重要作用.南海大洋钻探ODP 1143站2 Ma以来的碳酸钙分析,提供探讨第四纪冰期旋回中碳酸钙泵作用的高分辨率记录.统计研究结果表明,南海第四纪冰期至间冰期过渡期,碳酸钙堆积速率的最高值领先于δ18O最轻值约3.6ka;而间冰期至冰期过渡期,碳酸钙溶解程度最高值滞后于δ18O最轻值约5.6 ka.碳酸钙泵在冰期至间冰期过渡期向大气释放CO2,而在间冰期至冰期过渡期将大气CO2泵入深海.碳酸钙泵的这种海水CO2-3浓度的调节功能,直接控制全球大气CO2的部分变化,从而影响第四纪全球碳循环系统.
Preservation and dissolution of calcium carbonate (ie, calcium carbonate pumps) control the pH of the world oceans through their bumper effects, which in turn may have an important role in the global atmospheric CO2 concentration changes. Carbon dioxide since the ODP 1143 station was drilled at ODP 1143 station in the South China Sea Analysis and provide a high-resolution record for exploring the effect of the calcium carbonate pump in Quaternary glacial cycles.The statistical results show that the highest value of the accumulation rate of calcium carbonate leads the δ18O lightest value in the transitional period from Quaternary to interglacial periods in the South China Sea, 3.6ka, while the maximum value of dissolution of calcium carbonate lags behind the lightest value of δ18O about 5.6 ka during the interglacial to glacial transitional period. The calcium carbonate pump releases CO2 to the atmosphere during the interglacial to interglacial transitional period, and during the interglacial to glacial transitional period Pumping atmospheric CO2 into the deep sea The CO2-concentration regulation of this calcium carbonate pump directly controls part of the global atmospheric CO2 changes that affect the Quaternary global carbon cycle.