February to June, 2002
Is this spring the warmest in recorded history? Or is it the coolest? We often
hear weather announcers discuss these things. How could you compare spring's arrival
from year to year? What could you measure?
In northern regions of North America, the melting of ice cover on lakes, rivers,
ponds and oceans is a welcome sign of spring. This event is known as "ice-out,"
and ice-out dates are an accurate way to measure spring's pace from year to year.
How to Participate in the Ice-Out Study
Here's What You'll Do:
Ice-Out Date of Your Local Waters to Journey North
- Adopt a frozen body of water near you. You may choose a lake, pond, river, stream,
bay, estuary--or even an ocean.
- Report back to us when ice-out occurs. (We define "ice-out" as the
time the body of water is 90% free of ice.)
Predict the Arrival of Spring
Official 2002 Ice-out Observation Posts
placed across the Northern Hemisphere, these 6 official sites will monitor the ice-cover
in their local waters. Guess when you think the ice will melt at each of these places.
||Point Hope, Alaska
|| 68.5 N,
|| 64.5 N,
||Rankin Inlet, NT
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