I stand at our office window at the end of the day, watching autumn’s golden light descend onto the city. Even in the daytime hours, I can view from my perch the patterns of angled light and shadow against the buildings and sidewalks – nature’s quiet pronouncement of a new season at hand. However, when I step outside the unwelcome heat reminds me summer has her own calendar. The city emanates our area’s lingering heatwave. The Southland’s record breaking temperatures puts many of us into hibernation mode, as we escape to our air-conditioned offices, homes, or shopping centers in hopes the heatwave will finally end.
“Any day now,” I tell myself. “Soon.”
It’s no surprise discussions about the heat leads to the hot-button topic of climate change. While a surprisingly significant portion of Americans remain unconvinced about the subject, scientists have reached a consensus about global warming. Scientists turn to historical data on climatic patterns to understand the precipitation and temperature changes we are experiencing today. Nature, as it turns out, has been recording environmental changes for us.
The tree rings of old trees provide dendroclimatologists (the climate scientists who study trees) with up to hundreds of years of data, cycles of dry and wet seasons recorded into a concentric database of wood. Dendroclimatologists study the pattern of wide and narrow rings to measure extreme weather cycles of heat and drought, including their frequency and length. This information, and layers of other historical data, are fed into forecast models for anticipating future possibilities, including drought, and water management.
The debate on climate change does not end with people’s acceptance or denial. I am fascinated by the question amongst “believers” about whether human activities have contributed to this condition. Studies have examined the natural cycles of the earth’s temperature and scientists cannot explain the warming trends of the last 50 years based upon natural causes alone.
We are told however that it is not too late for action on climate change. But if the debate is being shaped by culture versus science, can we close the cultural divide in time to develop solutions that will make a difference to the planet?