Nothing Short Of Staggering: USGS Maps Showing Arrival Of Spring In 2017
Anyone living in the eastern United States has probably noticed how unusually warm it’s been this February. And it’s not just your imagination! In fact, there’s a good way to visualize this.
The US Geological Survey has a neat set of maps, updated daily, showing how early spring has arrived in each state this year — an index based on plant events, like leaves appearing on trees and flowers blooming. In a swath of the country from San Antonio to New York City, spring arrived two to three weeks earlier than usual. In Washington, DC, spring arrived 22 days early:
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Maps from USGS Phenology website - https://www.usgs.gov/news/just-how-early-spring-arriving-your-neighborhood-find-out-0
On one level, this isn’t terribly surprising. As the USGS points out, scientists have known for some time that “climate change is variably advancing the onset of spring across the United States.” It’s one of the (many, many) indicators of a warming planet. “These findings are consistent with the fact that the instrumental record shows that 2016 was the hottest year ever recorded for the globe, and that it was the third record-breaking year in a row,” USGS notes.
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Back in 2014, Elizabeth Grossman wrote an excellent piece for Ensia on the weird disruptive effects of early springs. A series of “false spring” events in the Sierra Nevadas in the 1980s and 1990s, for instance, destroyed an entire population of Edith’s checkerspot butterflies — because it desynchronized when the butterflies emerged and when the flowers they rely on for food started blooming. One big question, Grossman writes, is whether species can adapt to these increasingly common early spring events — so far, some species have adjusted, but not all. Now, the churlish thing to do would be to point out that these early springs are also harbingers of much more drastic changes to come — global warming, melting ice caps, flooded coastal cities, hellish heat waves, droughts, and much more. But eh, that can wait for another day. May as well enjoy things for now.
EDIT
http://www.vox.com/science-and-health/2017/2/28/14761788/early-spring-map
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