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Early citizen scientists collected rare ice data, confirm warming since industrial revolution
http://yfile.news.yorku.ca/2016/04/26/early-citizen-scientists-collected-rare-ice-data-confirm-warming-since-industrial-revolution/[font face=Serif]26.04.2016
[font size=5]Early citizen scientists collected rare ice data, confirm warming since industrial revolution[/font]
[font size=3]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.
…
“These data are unique,” said Sharma. “They were collected by humans viewing and recording the ice event year after year for centuries, well before climate change was even a topic of discussion.”
…
For example, the study found that, from 1443 to 1683, Lake Suwa’s annual freeze date was moving almost imperceptibly to later in the year – at a rate of 0.19 days per decade. From the start of the Industrial Revolution, however, that trend in a later freeze date grew 24 times faster, pushing the lake’s “ice on” date back 4.6 days per decade. On the Torne River, there was a corresponding trend for earlier ice break-up in the spring, as the speed with which the river moved toward earlier thaw dates doubled. These findings strongly indicate more rapid climate change during the last two centuries, the researchers report.
…[/font][/font]
[font size=5]Early citizen scientists collected rare ice data, confirm warming since industrial revolution[/font]
[font size=3]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.
…
“These data are unique,” said Sharma. “They were collected by humans viewing and recording the ice event year after year for centuries, well before climate change was even a topic of discussion.”
…
For example, the study found that, from 1443 to 1683, Lake Suwa’s annual freeze date was moving almost imperceptibly to later in the year – at a rate of 0.19 days per decade. From the start of the Industrial Revolution, however, that trend in a later freeze date grew 24 times faster, pushing the lake’s “ice on” date back 4.6 days per decade. On the Torne River, there was a corresponding trend for earlier ice break-up in the spring, as the speed with which the river moved toward earlier thaw dates doubled. These findings strongly indicate more rapid climate change during the last two centuries, the researchers report.
…[/font][/font]
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