The Relationship Between Marine Plankton 13C/12C and CO2 Concentration: Proposed Field Studies

假设海水表层颗粒物有机物（POM）的13C/12C与环境CO2分子浓度呈显著的反比关系。这一假设将通过采样和同位素分析悬浮的POM来验证，并与NOAA赞助的pCO2和TCO2测量相一致：(1)在夏威夷和百慕大附近的季节性采样站，以及(2)在太平洋和大西洋的巡航横断面进行测量。这项研究的结果将对使用这种同位素测量作为当前海洋中随时间变化的海洋/大气二氧化碳浓度的代用物具有重大意义。这项研究还将通过海洋沉积记录中的同位素变化，帮助重建过去全球二氧化碳浓度的变化。此外，还将测定地表水颗粒有机碳和氮的浓度，并与同位素测定一起补充NOAA支持的海洋碳生物地球化学研究。

It is hypothesized that a significant inverse relationship exists between the 13C/12C of particulate organic matter (POM) and the ambient concentration of molecular CO2 in surface seawater. This hypothesis will be tested by sampling and isotopically analyzing suspended POM in concert with NOAA- sponsored measurements of pCO2 and TCO2 i) at seasonally sampled stations near Hawaii and Bermuda, and ii) during cruise transects in the Pacific and Atlantic Oceans. The results of this research will have significant implications for the use of such isotopic measurements as a proxy for time-integrated ocean/atmospheric CO2 concentrations in the present ocean. This research will also aid in the reconstruction of past changes in global CO2 concentrations via isotopic variations in the marine sedimentary record. In addition, the concentrations of surface water particulate organic carbon and nitrogen will be determined, and together with the isotopic determinations will complement NOAA- supported investigations of marine carbon biogeochemistry.