Abstract

Glazer was invited to participate on the expedition to perform three primary objectives: (i) provide in situ electrochemical surveying and profiling, (ii) deploy and recover temperature loggers at diffuse flow sites of interest, (iii) collaboratively work with Sean McAllister and Dave Emerson on shipboard iron oxidation rate experiments that had been pioneered during the 2013 Loihi expedition. As a result of the in situ electrochemical analyzer (ISEA) being damaged during shipping to Guam, the ISEA was nonfunctioning during the first few days of setting up on board. Glazer worked to diagnose the problem and discovered two independent issues: (i) the two pin power bulkhead connector had been damaged in transit, thus providing only intermittent power to the CPU board upon initialization, and (ii) the RAM on the CPU board was damaged, preventing a successful boot sequence of the instrument. Glazer rewired the instrument endcap to supply power to the instrument through spare pins on an alternate bulkhead connector, but unfortunately, no spare RAM was available on Guam, or possible to receive via shipping in time for the expedition. Subsequently, Glazer and chief scientist, Craig Moyer agreed that staying on the expedition wouldn’t have been the most productive use of Glazer’s time. Glazer reviewed the temperature loggers use with Moyer and Emerson, and reviewed the procedures for the iron oxidation experiments with McAllister prior to departure to salvage as many objectives as possible.