Romina Centurion’s Blogs Leg 4

August 1, 2018

The last dive…

Today was the last dive for JASON. Everything was perfect and now all the instruments are working very well on the Submarine Fiber-Optic Cabled Observatory. Engineers and scientists have done an amazing job along the UW-NSF-OOI VISIONS'18 Cabled Array expedition for the last 6 weeks. Now it is time to go back home.

As a marine biologist being able to see the diversity of life in extreme conditions has been a very inspiring experience to me. I would love to study the Hydrothermal Vent Biological Communities and maybe come back next year!

July 30, 2018

Today JASON was in a rescue mission. JASON needed to find an “undervator”, which is a basket used to take equipment and tools to the seafloor. The undervator contained valuable instruments and was abandoned last year because there were some problems with the winch. After 6 hs diving JASON finally found the undervator! Amazing job!

July 28 & 29, 2018

The last two days and after two long dives JASON finally installed a new plume imaging sonar in the ASHES hydro- thermal field. Also, a temperature survey was completed at Inferno and Mushroom vents.

July 27, 2018

A tour for the ASHES hydrothermal vent field! I have only had the chance to watch the hydrothermal vents in documentaries and books. I can’t believe being here and have the opportunity to watch them in real time! I’m very thankful to Deb and Orest for let me participate in this cruise. It is a life changing experience!

July 26, 2018

We arrived early in the morning to the Axial Seamount. JASON is replacing an old deep profiler for a new one. After that another CTD cast is deployed to verify the instrument data.

Jul 25, 2018

A CTD was deployed to verify the data of the instruments. We spent the day doing titration to determine oxygen concentrations. And for chlorophyll analyses we filtered the water samples in a dark room. Now all the samples are ready for posterior analyses back to the lab in Seattle. Thanks a lot Julie for teaching us how to do the procedures in the lab!

July 24, 2018

Today a new Deep Profiler was deployed at 2900 m! Amazing job from engineers!

July 23, 2018

A second plankton tows was conducted today and the samples looked different from the first tows.

Also, a CTD cast was conducted for verification of instruments. We have learned how to take subsamples for measurements of CO2, Salinity, O2 and nutrients.

July 22, 2018

Today a new Deep Profiler System was deployed to collect oceanographic data profiles of chemistry, temperature, and other oceanographic properties in water depths. It was a very hard work during hours. Watch the video!

ROV is in the water again to complete the Deep Profiler System Mooring. During the dive a curious shark appeared and also a big yellow jelly.

July 21, 2018

Today we are finally at sea! It was pretty exciting to start working at the Jason (Remotely Operated Vehicle) control Van as a logger entering event descriptions. Inside the van there are multiple screens for each Jason’s camera and for ship position. Engineers and scientists have a very meticulous job controlling the ROV. The first ROV mission was recovery a of the Deep Profiler Moorings at the Endurance Offshore site.