cruise plans technology education participants calendar
         
 
Science News:
June-Aug. 2000
S M T W T F S
 25 26 27  28 29 30 1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29 
 30 31 
 1
 2  3 5
 

NeMO Date: July 14, 2000
Ship's Location:
45 51.8'N/130 00.5'W

 
         
         
  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).
 


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.