I’ve lived in Massachusetts for a year now, watching the seasons change from week to week, month to month. My favorite place to observe this passage of time is Blue Hills, a large preserve a few miles south of Boston that serves as my natural retreat from the hustle and bustle. Whether I am hiking, jogging, or mountain biking on the 100+ miles of trails, I watch for the subtle shifts in color, the steady evolution of life through the seasons. From a largely brown forest in January, when pops of green came from tuffets of moss and stands of pine and hemlock. To February, when snow blanketed the forest floor and fell in clumps from slumping conifers. Then came the floods and the buds in March and April, as trees and grasses tried to break through the cold dampness. May brought warmth and an explosion of life, filling the forest with young green leaves, chirping birds, and bell-shaped blueberry blossoms. In June, the laurel blooms transformed my favorite trail into a lacy wonderland of white petals. July brought wild blueberries by the bushload, sweet from the sweltering sun. The heat carried through August, and the park would be the perfect shady refuge if not for swarms of gnats and mosquitoes. Leaves began to turn with cooler weather in September, leading to a beautiful patchwork of yellow and orange by October. Wind, rain, and the first frost kicked off November, erasing the trails with an ankle-deep pile of colorful leaves. As December approached, the leaves faded to brown and flattened into the forest floor, my feet instead crunching on ice now as winter impends.
Now, I’m not the first person inclined to watch the seasons here – in fact, this very park is the cradle of American meteorology, historically speaking. In 1885, MIT scientist Abbott Lawrence Rotch founded a weather observatory on Great Blue Hill, a high point with panoramic views of the greater Boston area and Massachusetts Bay. From the stone tower, Rotch began what is now the oldest continuous meteorological record in North America, over 138 years of daily temperature and pressure readings, wind data, and other notes. In the 1890s, Rotch’s team pioneered the use of kitesondes for atmospheric profiling, using these results along with geometric techniques to develop an early understanding of cloud heights and movement. Some of the earliest weather balloons were released here in the 1930s, probing the upper atmosphere for the first time under a range of weather conditions. The highest hurricane windspeed over land was recorded here in 1938, a powerful 186 mph gust during the infamous Long Island Express. Today, the tower is home to a large array of (mostly duplicative) instruments, automatically recording but manually analyzed by a team of volunteers for the best possible continuation of the record. Beneath the tower is a small museum, which is an interesting window into the history of meteorological observation for children and weather buffs alike. The view from the observatory is unmatched, an aerial view of Boston that can extend to Cape Cod, Narragansett Bay, and Mount Monadnock on clear days but usually just gives you an up-close-and-personal view of the clouds as they move and evolve overhead. In any weather, this is a very cool site to have close to home, and I am honored to participate as another data point in a rich observational tradition.