thephotosocietyのインスタグラム(thephotosociety) - 6月7日 22時27分

Photo by @migeophoto // Henry David Thoreau, America's grandfather of environmentalism, spent many days of his life wandering the woods near Walden Pond, meticulously documenting nature's plants, animals, and weather patterns. In a new exhibit: "This Ever New Self: Thoreau and His Journal," @themorganlibrary has brought together twenty of Thoreau's journals, along with his writing desk and other artifacts, allowing visitors to slow down and enter the headspace of this thoughtful observer. Thoreau's journals (seen above) are so detailed, scientists have been able to extract his observations as data to monitor climate change in and around Walden Pond. In a book titled 'Walden Warming,' Richard Primack notes that spring is coming to this area of the country an average of ten days earlier than it did in Thoreau's time. Recently, reporting for WGBH, Craig LeMoult joined Richard on a walk around the area... "As [Richard] hiked the trails around the pond, he squinted into the woods. “This is a plant that’s just leafing out today," he said. "This is the black birch.” When Thoreau saw black birch leaves for the first time in the 1850s, it happened noticeably earlier. “The trees, shrubs and vines like poison ivy and grape are leafing out two weeks earlier on average than in Thoreau’s time,” Primack said. Leafing time is closely tied to temperature. And the mean spring temperature in the Concord area has jumped from about 42 degrees in Thoreau’s time to nearly 48 degrees today." // #thoreau #morganlibrary #henrydavidthoreau #environmentalism #parisagreement #climatechange #thoreau200

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