A Marine Educator At Sea

Sea Grant's Bill Hanshumaker chronicles ocean research missions

A Marine Educator At Sea

Entries Tagged as '2011 Crew'

Cruise Summary

October 28th, 2011 · No Comments · 2011 - R/V Wecoma, 2011 Crew, Deployment, LDEO, SIO

Dr. Robert Dziak contributed this cruise summary: “The OBS deployment cruise was an unqualified success. Our highly efficient team of sea going professionals was able to maintain a brisk deployment schedule and completed all 25 ocean bottom seismometer deployments within 8 days. We averaged 3 deployments a day, including time for instrument surveys to derive […]

[Read more →]

Tags:··

Last Day at Sea

October 21st, 2011 · No Comments · 2011 - R/V Wecoma, 2011 Crew, Missions

We deployed the 24th seismometer at 9: this morning. The atmospheric pressure is dropping and the seas are rising, making the deployments more challenging. The roll of the ship increases the difficulty of both getting the seismometer to the rail and successfully releasing it over the side. We are heading back to Newport to pick […]

[Read more →]

Tags:····

A Day in Transit

October 20th, 2011 · No Comments · 2011 - R/V Wecoma, 2011 Crew, Deployment, Seismometers

Following the continental margin, the Wecoma cruised south at about 10 knots for most of the day. The seas picked up slightly, and there were light scattered showers. We deployed another Abalone seismometer at 4:30, and it was on the bottom by 5:30. We will be deploying the last Cascadia seismometer at 1: am.

[Read more →]

Tags:·

CTD Cast

October 17th, 2011 · 2 Comments · 2011 - R/V Wecoma, 2011 Crew, CTD, Procedures

CTD stands for conductivity, temperature and depth. These terms refer to the changing seawater characteristics that the CTD array encounters as it descends. It electrically sends continuous measurements back to the ship. Conductivity is an electrical measurement of salinity. The salinity varies near the surface, but is a reliable 34 to 35 parts per thousand […]

[Read more →]

Tags:··

Second Day at Sea

October 16th, 2011 · No Comments · 2011 - R/V Wecoma, 2011 Crew, Deployment, LDEO, SIO

Yesterday, we deployed three seismometers, two “Abalones” from Scripps Institute of Oceanography with the trawl resistant design and one from the Lamont-Doherty Earth Observatory (LDEO) called “Cascadian” which also has an absolute pressure gauge and hydrophone. These seismometers are generally deployed deeper along the continental margin.  

[Read more →]

Tags:··

Ocean Bottom Seismometers

October 15th, 2011 · No Comments · 2011 - R/V Wecoma, 2011 Crew, LDEO

There are two sets of Ocean Bottom Seismometers (OBS), 10 were built by Lamont-Doherty Earth Observatory (LDEO) and include pressure gauges. The pressure gauges are for sensing vertical seafloor uplift and will be deployed on the edge of the continental margin to detect strain accumulation between the North American and Juan de Fuca plates. The […]

[Read more →]

Tags:·