|At-Sea Noble Gas Mass Spectrometer|
Cara Manning (MIT/WHOI graduate student), Dempsey Lott, and I are developing an at-sea noble gas mass spectrometer. This instrument, which is based on the design of the regular equilibrator inlet mass spectrometers (EIMS) that measure O2/Ar ratios, will be able to measure Ne, Ar, Kr, and Xe abundances in the underway water of a ship, allowing construction of noble gas data sets of unprecedented resolution. Such noble gas data sets will allow construction of air-sea gas exchange parameterizations specifically suited for heterogeneous environments such as in coastal waters or around ice floes. In our initial development, we have concentrated on purifying the gas stream in order to detect the low abundant noble gases and on choosing the optimal equilibrator cartridge. Support for this work comes from the NSF Ocean Technology and Interdisciplinary Coordination program.