By Dagomar Degroot
In Toronto, 2013 was a year of storms. The media storm kindled by the mayor’s chicanery was twice interrupted by meteorological storms that threatened lives and property on an unprecedented scale. On July 8th more than 100 mm of rain inundated the city in a matter of hours, triggering flash floods that caused more than $1 billion in property damage. Three days before Christmas, winter storm Gemini unleashed more freezing rain than was ever recorded in Toronto. Some 300,000 customers – representing perhaps one million people – lost power as temperatures plummeted below -10° C. This time the city’s infrastructure succumbed to the force of frozen water, and those desperate for heat too often turned to candles, generators, and other sources of deadly carbon monoxide. I am climate historian living in Toronto. Experiencing these storms helped me better understand how climate change, weather and society influence each other in the past, present, and future.
Climate historians or “historical climatologists” reconstruct past weather and climate using some combination of computer simulations, evidence from the natural world, and documentary sources. The field is interdisciplinary, and many of its scientists stop at these climate reconstructions. However, most of its historians also explore relationships between climate change, weather, and human history. As I have described in previous Active History articles, I am one of those historians. My research explores the social influence of the “Little Ice Age,” a roughly 1° C cooling of global temperatures between the thirteenth and nineteenth centuries. I hope that such research will give us insight into relationships between climate change and society in a warmer future. Continue reading