Collaborative Research: Organic Geochemical Studies In The Arabian Sea

9310684对冲 由于阿拉伯海的初级生产受季风驱动，因此阿拉伯海过程研究提供了一个机会，可以跟踪各种生物标志化合物从透光层的起源到最终埋藏和保存在海底沉积物中的过程。 在这个项目中，主要调查人员将对大约100种不同的颗粒生物化学化合物-脂质、色素、氨基酸和碳水化合物-进行取样和定性，这些化合物是在表层海洋的起源点，随着它们以特定形式沉降到海底，以及在表层和地下沉积物中，通过在深水中的转化而形成的。 对季风事件期间和两次季风事件之间收集的数据进行分析，将使调查人员能够确定这些有机物质的反应性和转化情况，并评估其作为海洋古环境指标的沉积物保存潜力。

9310684 HEDGES Because of the monsoons-driven seasonality of primary production in the Arabian Sea, the Arabian Sea Process Study affords an opportunity to follow a variety of biomarker compounds from their point of origin in the photic zone to their eventual burial and preservation in seafloor sediments. In this project, the principal investigators will sample and characterize some 100 different particulate biochemical compounds -- lipids, pigments, amino acids, and carbohydrates -- at their point of origin in the surface ocean, through transformation in deeper water as they settle in particular form to the seafloor, and in surficial and subsurface sediments. Analysis of data collected during and between monsoon events will permit the investigators to characterize the reactivity and transformations of these organic substances and to assess their potential for sedimentary preservation as marine paleoenvironmental indicators.