CHNS analyzer and custom-built filter holders for in-situ large volume pumps

申请的资金用于：（1）购买和安装一台CHNS元素分析仪，用于定量测定海洋和淡水沃茨中沉积物、岩石、浮游生物以及悬浮和沉降颗粒物样品的C、H、N和S含量;（2）升级用于收集海洋表层水和深水中悬浮和沉降颗粒物的现场大容量水泵。新的仪器和升级将支持对海洋碳循环、浮游植物获取碳和相关生物元素、食物网结构以及建立有机生产力和埋藏的古海洋学记录的研究，这些记录跟踪过去海洋-大气变异的变化。

Funding is requested for (1) the purchase and installation of a CHNS elemental analyzer for carrying out quantitative determinations of the C, H, N and S contents of sediments, rocks, plankton and samples of suspended and settling particulate materials from marine and fresh waters, and (2) the upgrade of in-situ large volume pumps used to collect suspended and sinking particles in the surface and deep water of the ocean. The new instrument and upgrades will support research on the carbon cycle in the ocean, the acquisition of carbon and related biogenous elements by phytoplankton, food web structure, and the construction of palaeoceanographic records of organic productivity and burial that track changes in ocean-atmosphere variability in the past.