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Cruise Day 57 Speed 0 knots (kts) (on station) Course n/a Location Chukchi Slope, ~108 nm north of Barrow, Alaska Depth 1625 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Aurora occur in the thermosphere, the upper layer of the Earth’s atmosphere. There

Cruise Day 56 Speed 0 knots (kts) (on station) Course n/a Location Southern Canada Basin, ~120 nm north of Barrow, Alaska Depth 3484 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Did you see that [story and video](http://www.dispatchtribunal.com

Cruise Day 55 Speed 2 knots (kts) Course 124° (SW) Location Southern Canada Basin, ~122 nm north of Barrow, Alaska Depth 3580 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Many simple chemical tests involve color changes. Most students will have used pH

Cruise Day 54 Speed 7 knots (kts) Course 227° (SW) Location Canada Basin, ~220 nm north of Barrow, Alaska Depth 3900 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Radon exposure can increase one’s chances of developing lung cancer, so the Environmental

Cruise Day 53 Speed 8.5 knots (kts) Course 31° (NNE) Location Canada Basin, ~240 nm north of Barrow, Alaska Depth 3883 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Ocean acidification due to increasing atmospheric carbon dioxide concentrations is a

Cruise Day 52 Speed 1.5 knots (kts) Course 242° (WSW) Location Canada Basin, ~250 nm north of Barrow, Alaska Depth 3894 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Barometric pressure (also known as air pressure or atmospheric pressure) at sea level is

Cruise Day 51 Speed 12 knots (kts) Course 200° (SSW) Location Canada Basin, ~340 nm north of Barrow, Alaska Depth 3879 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Answer to Sunday’s riddle: A rope ## TODAY’S JOURNAL: As you might infer from our speed

Cruise Day 50 Speed 0 knots (kts) (on station) Course n/a° Location Canada Basin, ~395 nm north of Barrow, Alaska Depth 3873 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) In addition to the aloft conn for steering the Healy through ice, and the ability to

Cruise Day 49 Speed 6 knots (kts) Course 200° (SSW) Location Canada Basin, ~409 nm north of Barrow, Alaska Depth 3875 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) There are other factors besides the direction that a ship is pointing that determine its

Cruise Day 48 Speed 7 knots (kts) Course 237° (WSW) Location Canada Basin, ~495 nm north of Barrow, Alaska Depth 4157 m ## GO DEEPER DISCUSSION: (see previous journal for the questions.) Seawater has a lower freezing point than fresh water. The surface temperature of water we