Collaborative Research: A High-resolution Record of Productivity and/or Ventilation of the Northeastern Pacific from Soledad Basin, Baja California

这项研究将利用对加利福尼亚州巴哈附近Soledad盆地岩心的多代理研究来确定过去10,000年来底水氧气的变化主要是由地表水生产力的变化还是地下水通风的变化引起的。需要测量的指标包括浮游有孔虫组合、球状有孔虫和厚皮有孔虫的氧同位素比值、沉积物中钼的丰度和底栖有孔虫中的镁/钙。年表将由AMS 14C和210PB提供。大多数代理的样本分辨率将为100年。MO测量和海面温度估计将以数十年的采样分辨率进行。

This study will use multiproxy study of cores from the Soledad Basin off Baja CA to determine if bottom water oxygen changes over the last 10,000 years are caused primarily by productivity changes in surface waters or changes in ventilation of subsurface waters. Proxies to be measured include planktic foraminifer assemblages, oxygen isotope ratio of Globigerina bulloides and N. pachyderma, sediment Mo abundance, and Mg/Ca in benthic foraminifers. Chronology will be provided by AMS 14C and 210Pb. Sample resolution for most proxies will be 100 years. Mo measurements and sea surface temperature estimates will be done at multidecadal sampling resolution.