[MCN] North American drought as of *December* 2017:Latest update

Lance Olsen lance at wildrockies.org
Sun Jan 28 08:43:48 EST 2018

https://www.ncdc.noaa.gov/temp-and-precip/drought/nadm/maps <https://www.ncdc.noaa.gov/temp-and-precip/drought/nadm/maps>

A species or ecosystems recovery from disturbances can be reversed, and  fail; e.g.,  “  …  recovery rates decrease as a catastrophic regime shift is approached, a phenomenon known in physics as 'critical slowing down.'  ….  In all the models we analyzed, critical slowing down becomes apparent quite far from a threshold point, suggesting that it may indeed be of practical use as an early warning signal” (van Nes and Scheffer. American Naturalist, 2007).

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