Arctic Expedition - Day 15 - Teachers at the North Pole
|The view from the bow of our icebreaker USCG Healy (Master Chief Sullivan)|
The third straight day of sunshine and more vitamin D for a crew with good morale. Very little coring today (relative to previous days of core, core, and more coring).
We are transiting west, towards an area with very shallow waters and geologic features called pingos, which are mounds "of earth-covered ice found in the Arctic and subarctic that can reach up to 70 metres (230 ft) in height and up to 600 m (2,000 ft) in diameter."
What we seem to be more interested in, however, are pingo-ish, underwater hills that "form when methane hydrate (a frozen mixture of gas and seawater) decomposes beneath the seafloor, releasing gas that squeezes deep sediments up onto the seafloor like toothpaste from a tube," according to Charlie Paull and William Ussler, MBARI geologists.
Our goal is to core into the "moat" sediments, as seen in this image:
|(c) 2007 MBARI|
Here's the update on the two San Diego Unified School District teachers on-board Healy:
Steve Walters (Mission Bay High School) participated in the deployment of one piston coring activity, completed laundry in the ship's laundry room, and is currently on his fourth book of the cruise, which was checked-out from the ship's Arctic library.
Danny Blas (Lincoln High School) interviewed ship's CAPT Reeves and ship's ENS Follmer for a soon-to-be-released video, edited today's video on Marti Jeglinski's team, and wrote today's blog post.
Here's today's video: