Sharon Walker with an MPR. An additional exploratory aspect of the MAPR work during this cruise is to evaluate a new modification to the MAPRs. Our experience has shown that one of the chemical sensors usually attached to the CTD is a valuable indicator of when we are closer to a hydrothermal source within a particle plume. Three MAPRs were specially modified just prior to this expedition to include a version of this chemical sensor, and this is our first opportunity to test them in the field. The initial results are promising. Image courtesy of UCSB, Univ. S. Carolina, NOAA, WHOI.
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