Organic Geochemical Flux Studies in the Equatorial Pacific Using Swimmer Excluding Rotator Traps

使用不包括旋转陷阱的游泳器进行赤道太平洋有机地球化学通量研究

• 批准号: 9022319
• 负责人: John Hedges
• 金额: $ 34.58万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-15 至 1994-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022319&HistoricalAwards=false
• 关键词: Organic; Geochemical; Flux; Studies; Equatorial

The P.I.:s propose to conduct an organic geochemical investigation of the flux of particulate matter in the Central Equatorial Pacific (EQPAC). This study should allow them to reconcile water column production and sinking fluxes of the major biochemicals (lipids, amino acids, pigments, and carbohydrates) with the corresponding sediment deliver, accumulation and preservation rates, using well over 100 individual organic compounds. Major questions are: 1) What are the dynamics of particles in the surface Equatorial Pacific as reflected by their organic constituents? 2) What fractions of the different biochemicals produced in the surface waters reach the deep ocean and are accumulated at the sediment-water interface? 3) What are the relative reactivities of different organic substances in the underlying sediments? 4) Do biochemical distributions differ appreciably with the inorganic composition of the various sediment types along the study transect? To address these questions the P.I.:s will sample suspended particles by insitu pumping, sinking particles using our new swimmer-exclusion traps, and bottom sediments from box cores at transect and time-series stations in coordination sampling with other EQPAC investigators.

P.I.：建议对中赤道太平洋（EQPAC）颗粒物通量进行有机地球化学调查。 这项研究应该使他们能够使用 100 多种单独的有机化合物，将主要生物化学物质（脂质、氨基酸、色素和碳水化合物）的水柱产生和下沉通量与相应的沉积物输送、积累和保存率相协调。 主要问题是： 1）赤道太平洋表面颗粒的有机成分反映了哪些动态？ 2) 地表水中产生的不同生化物质的哪些部分到达深海并在沉积物-水界面处积累？ 3）底层沉积物中不同有机物质的相对反应性是什么？ 4) 沿研究样带的各种沉积物类型的无机成分的生化分布是否明显不同？ 为了解决这些问题，P.I.：将通过原位抽吸对悬浮颗粒进行采样，使用我们新的游泳者排除陷阱对下沉颗粒进行采样，并与其他 EQPAC 研究人员协调采样，从横断面和时间序列站的箱芯中采集底部沉积物。