(The second in a series of essays, On Climate Truth and Fiction, in which I raise questions about environmental distress, the human experience, and storytelling. It first appeared on 3 Quarks Daily. The first part is here.)
When I was a kid, I used to wonder about the possibility that the planet could slip back into an ice age. I grew up in the Rocky Mountain region of the northwestern USA, where winters lasted half the year and summers were brief and blustery. I hated being cold all the time. Aware that ice ages result from some sort of natural cycles, I worried what might happen if the planet should head that way again. I tried to imagine how we would construct cities and farms, how we would travel between countries or even build roads, if huge glaciers grew down from the Arctic Circle and smothered our little mountain town.
So I was surprised to learn, much later, that we actually do live in an ice age. In historical memory, we’ve been enjoying a warmish, rather pleasant phase of this ice age, to be sure—an interglacial phase, called the Holocene, that’s persisted for about ten thousand years. But interglacial phases, like our present one, have only been brief respites, as the ice age has cycled between glacial and interglacial phases over the past two million years. Past interglacials never lasted very long and, left to its own geological devices, all signs suggested that this one would end too, to be followed by a much longer glacial phase—the stuff of my nightmares.
In fact, a 2016 study indicates that the Holocene interglacial should already be ending. As it was, the weather of the fourteenth through mid-nineteenth centuries was already given to frequent fits and bouts of cold weather extremes. The precise causes for the drop in temperatures are complex, and though it didn’t get cold enough to become a real glacial age, the period is now playfully referred to as the Little Ice Age. During that time, centuries of sporadic, crop-crippling cold led to erratic harvests, reducing grain yields and causing periodic famine, helping to topple Chinese dynasties and destabilize the feudal order of the European Middle Ages. Persistent hunger and poor nutrition amplified the depredations of plague and other diseases across Europe. In England, the Thames regularly froze over. In North America, even the Rio Grande froze up more than once. Peoples across southern North America suffered frequent droughts and malnutrition, especially in the southwest, which remained persistently dry for a span of decades. Some agricultural peoples were forced to return to lives of nomadism. Across the northern latitudes, glaciers extended themselves. The Norse Greenland colony, which had been thriving for centuries, collapsed and was abandoned by around 1500 CE. Early European colonists in North America struggled to survive frequent winters of bitter cold and failed harvests.
Recent Comments