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Science
Report:
ROPOS
dive 553 was the first dive this year with the fluid sampler at the ASHES
vent field. Vent fluids were collected and will be compared with samples
from previous years to look for changes in chemistry. Chemical sampling
started at ASHES over a decade ago and it is an interesting place because
the chemistry of the vent fluids changes dramatically over a short distance,
from one end of the field to the other. The dive also included deploying
and recovering temperature sensors, observation and sampling of sulfide
worms, and the deployment of a long-term flow meter. ROPOS dive 554 was
back in the water before midnight to finish the Imagenex survey at the southern
end of the 1998 eruption site where the pillow mound formed, and to make
ground truth observations based on the first half of the survey (on dive
546).
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Sampling the
vent fluids at Mushroom Vent in the ASHES vent field.
Deployment of the long-term flow meter developed by Paul Johnson, U.
Washington.
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