By Joe Loviska, graduate student in the Institute’s 15th cohort.
March 20, 2016. I’ve been keeping an eye on the western flowering dogwood (Cornus nuttallii) out in the parking lot of the Learning Center. It’s a small tree, maybe twelve feet in height. Its gray trunk and branches are spindly, filling out the vague shape of a mop standing on its handle. This dogwood grows at 1,220 feet above sea level on the west slope of the Cascades. It occupies a site that has good southern exposure, with dry, well-drained soil and a closed canopy of Douglas firs above. All of these facts and more dictate the beginning of the spring season for this particular tree, which is today. Today its leaf tips are poking out. Yesterday they were not. My friend the dogwood tree is awake.
Now it just so happens that today, March 20, the 80th day of the year (DOY), is also the vernal equinox. That is, the year-long wobble of Earth’s axis has tilted in such a way that the equator is squarely facing the sun. Translation? Equal amounts of day and night across the globe. In the Northern Hemisphere, this means the first day of spring, right in time for the dogwood to open its buds. Coincidence? You decide.