Module 1 • Arctic Exploration: Navigation
Student Page 1-3c
1. First some basics on ice conditions. Ice conditions depend on water current. When the flow
of water increases, it causes a stronger current. In an area with stronger current, ice forms later
and goes out earlier. The flow of water increases if (1) water flows through a narrowing; (2) water
flows around objects that sticking out, (for example, a landmass such as a cape); or (3) water enters
from other water sources (for example where a river flows into a lake or an ocean).
2. Watch “Season of Sea Ice 2002” and “Season of Sea ice 2003” available in Classroom Movies of the
Scrapbook in Expedition at PolarHusky.com.
These movies are made from satellite imagery and show the forma-
tion and disappearance (known as ice in or ice out) of ice, shown in
white, on the Arctic Ocean and along the route that Team GoNorth!
is traveling. In the upper left corner is the date counter. You can
stop and start the movie at any time.
Does the ice seem to behave the same in the two years
2002 and 2003? How, how not?
Notice how the ice forms last and goes out first in the strait
between Chukotka and Alaska (the Bering Strait). This is an excellent
example of ice dynamics.
Watch the 2003 movie several times; refer to the expedition route
map on page one when necessary and note down the following:
By what date is the ice formed solid at the expedition’s starting point, Provideniya,
and around the corner through the Bering Strait?
From this movie, when would you consider it no longer safe to be dogsledding along
the coast line on the last leg of the expedition route from Billing to Pevek?
3. You are now going to use Google Earth and an overlay image to (1) investigate which areas
present the most danger to the team along the last leg of the route from Billing to Pevek, and
(2) to calculate when the team should leave the Billing to be on the safe side.
PolarHusky.com