Collaborative Research: Development of a Porewater Sampling Underwater Mass Spectrometer System (POSUMS) for High-Resolution Biogenic Gas Measurements in Permeable Sediments
At present there is a disconnect between what we understand about permeable sediment biogeochemistry from small-scale manipulations and how we represent continental shelf biogeochemistry in a modeling framework. The “missing link” is a set of reliable tools to measure dynamic processes in the field, and thus to provide good data and a basis for appropriate parameterization for modeling. The instrumentation we will build will overcome several of the present limitations of porewater sampling in permeable sediment environments. The system is designed to operate in situ (on site) without enclosure artifacts. It will to sample over extended time periods, making it more likely to capture transient events that may dominate sediment-water exchange. And because the sampling interface is coupled to a mass spectrometer, the system can collect accurate and precise data for multiple chemical species simultaneously.
The primary purpose of our proposed research is to develop a system that meets the following research demands:
Check out our YouTube channel for updates on our progress!