Gray
Whales and Changing Sea Ice
How
far can gray whales go as they journey north to feed and breed in the
Bering and Chukchi
Seas? Only as far as the melting sea ice allows! You can see this
change on daily and monthly ice maps. As you do, try to predict when
the gray whales will reach the end of the trail.
Try
This!
-
Once
a week, look at this current sea ice map.
-
-
|
Daily Sea Ice (NOAA)
Click
for large map. |
Try
This!
It
can be hard to see patterns of change when you look at something
over a short period of time. Here you can see how the ice changed
in the past month.
-
Click
on this map to see an animation.
-
Stop
the animation. Click to today's date. Next, click back one
frame. You'll be able to see how the ice changed from the
beginning to the end of a month.
|
Sea
Ice Animation (NOAA)
(past month)
Click
for large map.
|
Predict!
Finally, look at the animated map to the right. It shows yearly
changes in sea ice concentration by the month.
|
Yearly
Sea Ice Animation
Click
for large map.
Image: Ron Morris |
Click
for larger images. |
Image:
NOAA |
Image:
NSIDC
|
Journaling
or Discussion Questions How
does the environment (in this case, arctic sea ice) change over years and
decades? To find out, scientists must collect long-term data. By doing this,
they have discovered some alarming changes. Click on each image for a larger
version. (Note: The left one includes assumptions about the future.)
- What
do these findings tell you about changes in sea ice thickness and coverage
(extent)?
- List at
least three ways you think these changes — and related ones —
could affect gray whales and other marine animals.
Find
out what scientists think>>
Other
Sea Ice Maps/Resources
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