Prolonged winters, advancing glaciers, colder summers, more frequent storms and extended cloudiness reduced arable land, shortened growing seasons, rotted grain in wet fields, and brought famine, disease and death. Coming after the prosperous Medieval Warm Period – when farmers grew wine grapes in England and Vikings raised crops and cattle in Greenland – it must have been quite a shock.
The LIA underscored how much better a warmer planet is than a colder one. Moderate warming above today’s norm would likely bring expanded cultivation during longer growing seasons in northern latitudes, fewer people dying from hypothermia during frigid winters, and many other benefits. Continue reading →