O2, pH, PCO2 and Carbon Diagenesis in Hemipelagic Sediments

半远洋沉积物中的 O2、pH、PCO2 和碳成岩作用

• 批准号: 8911268
• 负责人: Clare Reimers
• 金额: $ 19.03万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911268&HistoricalAwards=false
• 关键词: O2; pH; PCO2; Carbon; Diagenesis

High rates of organic matter degradation near the sediment- water interface together with slow CaCO3 dissolution are expected to result in pore waters that are undersaturated with respect to calcium carbonate to depths exceeding 57cm in heimpelagic sediments. This hypothesis will be tested by determining the effective in situ CaCO3 dissolution rate constant and estimating integrated rates of organic carbon and CaCO3 regeneration at three stations that underlie the California Current westward of Point Conception, California. In the first year, the thrust will be to further develop, calibrate and test PCO2 and pH micro- electrodes. Field work will be conducted both at the end of the first and the second year.

沉积物附近的有机物降解率很高- 水界面和缓慢的CaCO 3溶解 预计将导致孔隙沃茨不饱和， 深度超过57厘米的碳酸钙 深海沉积物 这一假设将由以下人员进行检验： 确定有效原位CaCO 3溶解速率 恒定和估算有机碳的综合速率， CaCO 3在三个站的再生， 加州目前位于加州的波因特康塞普西翁向西。 在第一年，重点将是进一步发展， PCO 2和pH微电极的标定和测试。 实地工作 将在第一次和第二次会议结束时进行 年