Dispersion, Cycling and Burial of Organic Carbon in a River-Dominated Margin: The Fly River/Gulf of Papua Shelf

这项研究的目标是确定什么过程控制着飞河/巴布亚海湾陆架系统中维管植物碎片、化石干酪根、矿物伴生土壤有机质和海洋浮游植物的运输、循环和保存。南卡罗来纳大学的一位PI计划通过使用一套新技术从悬浮沉积物和海底沉积物中分离和表征这四个有机碳库(OC)，从元素、同位素和分子水平上完成这一任务。根据结果，PI将解决以下三个目标：(1)确定GOP陆架Fly River扩散系统内四个有机碳池的分布；(2)跟踪沿扩散系统的四个有机碳池的浓度和组成的变化；以及(3)确定四个有机碳池在GOP埋藏过程中的固存速率和组成变化。

ABSTRACTOCE-0220600The goal of this research is to determine what processes control the transport, cycling and preservation of vascular plant debris, fossil kerogen, mineral-associated soil organic matter and marine phytoplankton in the Fly River/Gulf of Papua (GoP) shelf system. A PI from the University of South Carolina plans to accomplish this task by isolating and characterizing these four organic carbon pools (OC) from suspended and bottom sediments at the elemental, isotopic and molecular level using a suite of novel techniques. With the results, the PI will address the following three objectives: (1) determine the distribution of the four OC pools within the Fly River dispersal system in the GoP shelf; (2) follow the changes in concentration and composition of the four OC pools along the dispersal system; and (3) determine the sequestration rates and compositional changes of the four OC pools during burial in the GoP.