The Shumagin Islands

The Shumagin Islands

The R.V. Langseth

The R.V. Langseth

P10001702

snowy

moutaintops2

Author Archives: celia

Last days of shooting

2 August 2011, 21:28

celia

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It’s hard to believe it’s been three whole weeks since we joined the Langseth. It seems like just yesterday that we were waiting in our hotel room in Sand Point, sheltering ourselves from the rain and looking forward to adventures on board. With less than a week left on the ship, it’s time to start […]

Seismic Oceanography

26 July 2011, 19:50

celia

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Last night on watch, we launched a total of 54 XBT and XSV probes in order to measure properties of the water column with depth. XBT (expendable bathy-thermograph) and XSV (expendable sound velocity) probes are, unsurprisingly, expendable instruments which remain on the seafloor once deployed. The probes drop through the water down to the bottom […]

Bathymetry and papers

19 July 2011, 23:31

celia

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On watch recently we’ve had the responsibility of editing bathymetry data. The Langseth has been collecting a large volume of multibeam bathymetry data as we travel along our lines. These images of seafloor topography, acquired by measuring the time it takes a signal to travel down through the water, reflect off the bottom, and return […]

Day 5 – Science 1, Ocean 4 (But That “1” Makes All the Difference)

16 July 2011, 06:32

celia

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Today, Science won. After deploying the second streamer last night and having to reel it in once again in order to replace yet more sections, all the equipment is now in the water. Every twenty seconds, a blast from the air gun array rattles the Langseth and data pours in from our hydrophone array. Of […]

Day 3-On to streamer two!

14 July 2011, 21:40

celia

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Last night on the final watch of the day, we finally put out the last of streamer one! The first streamer is over a decade old, so it was expected to have some problems, but nobody expected it to take quite so long. After almost 48 hours of deployment, the last of the cable which […]