Maximum ice coverage on the Great
Lakes is declining
100% maximum ice coverage annually
75
Trend line
50
25
0
1980
1990
2000
2010
2020
On Lake Ontario, there are fewer days
each year with at least 5% ice coverage
125 frozen days annually
100
75
Trend line
50
25
0
1980
1990
2000
2010
2020
Maximum ice coverage on the Great Lakes
is declining
100% maximum ice coverage annually
75
Trend line
50
25
0
1980
1990
2000
2010
2020
On Lake Ontario, there are fewer days each year
with at least 5% ice coverage
125 frozen days annually
100
75
Trend line
50
25
0
1980
1990
2000
2010
2020
Maximum ice coverage on the Great Lakes
is declining
100% maximum ice coverage annually
75
Trend line
50
25
0
1980
1990
2000
2010
2020
On Lake Ontario, there are fewer days each year
with at least 5% ice coverage
125 frozen days annually
100
75
50
25
0
1980
1990
2000
2010
2020
On Lake Ontario, there are fewer days
each year with at least 5% ice coverage
Maximum ice coverage on
the Great Lakes is declining
125 frozen days annually
100% maximum ice coverage annually
100
75
75
Trend line
Trend line
50
50
25
25
0
0
1980
1990
2000
2010
2020
1980
1990
2000
2010
2020
On Lake Ontario, there are fewer days
each year with at least 5% ice coverage
Maximum ice coverage on
the Great Lakes is declining
125 frozen days annually
100% maximum ice coverage annually
100
75
75
Trend line
Trend line
50
50
25
25
0
0
1980
1990
2000
2010
2020
1980
1990
2000
2010
2020