Geoscience in the ice

We are ready to recover the Chirp! The Coast Guard requires everyone to wear mustang survival work suits on deck when ever equipment is going over the side.  They may not be the most stylish orange jumpsuits, but they sure keep you toasty warm!  (From left to right: Scripps grad students Emily & Shannon, me,  UCSD undergrad MacKenzie and Scripps grad student Jillian).

I am ready with my snips for the Chirp recovery!

We have been using a combination of towed Chirp subbottom sonar (the yellow instrument being brought on deck in the photo below) and the ship's hull-mounted subbottom system to image the sediments beneath the seafloor and select coring targets each night.

After a few days, we moved deep into the ice...but that didn't stop the science! Here's a shot of the of the multicore being prepped.  This instrument allows up to collect shallow seafloor sediment cores that preserve the sediment-water interface, so we can examine the modern seafloor sediment.

The piston core (shown below) collects a long pipe (60 or more feet) of sediment that can provide a record of climate history going back over 10,000 years.