Study co-led by Sapna Sharma confirms climate change since industrial revolution
In 1442, Shinto priests in Japan began keeping records of the freeze dates of a nearby lake, while in 1693 Finnish merchants started recording breakup dates on a local river. Together they create the oldest inland water ice records in human history and mark the first inklings of climate change, says a new report published April 26 out of York University and the University of Wisconsin.
The researchers say the meticulous record keeping of these historical “citizen scientists” reveals increasing trends towards later ice-cover formation and earlier spring thaw since the start of the Industrial Revolution.
Sapna Sharma, a York University biologist, and John J. Magnuson, a University of Wisconsin limnologist, co-led an international team of scientists from Canada, United States, Finland and Japan looking at this early data. Their findings are published in Nature Scientific Reports.
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