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Verbal·Information and Ideas·Command of Evidence
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Days per Winter That Lakes Have Surface Ice
LakeLatitude (degrees)1980–811985–861990–911995–962000–012005–06
Kalmarinjärvi62.79198172175184131152
Lake Neusiedl47.8277868712850104
Mirror Lake43.94122129125136141119
It is common for freshwater lakes near or above a latitude of 45° north of the equator, like Lake Mjøsa in Norway, to accumulate surface ice in winter. The amount and duration of ice depends on many factors, including local weather conditions as well as the lake’s depth, volume, and surface area, but a climate researcher claims that some lakes in these latitudes have seen a decline in the duration of ice between the early 1980s and the mid-2000s.
Which choice best describes data in the table that support the researcher’s claim?
A
Kalmarinjärvi is at a higher latitude than Mirror Lake and typically had more days of ice per winter than Mirror Lake did.
B
Kalmarinjärvi had fewer days of ice in the winter of 2005–06 than it did in the winter of 1980–81.
C
Kalmarinjärvi is at a higher latitude than Mirror Lake and typically had fewer days of ice per winter than Mirror Lake did.
D
Lake Neusiedl had more days of ice in the winter of 2005–06 than it did in the winter of 1980–81.