Blue Hill Observatory: A Historical Insight into Climate Science
The Blue Hill Observatory, located 15 miles south of Boston in Milton, Massachusetts, is one of America's oldest weather observatories. Since its establishment in 1885, it has maintained a continuous record of weather data using largely unchanged analog tools. This observatory plays a crucial role in climate research by providing a 'tried and true database' that helps distinguish real changes in weather patterns from those caused by new measurement technologies. The observatory's records have shown a 5°F (2.8°C) increase in average annual temperature since 1885 and a reduction in the duration of frozen ponds during winter by nearly three weeks. The observatory also highlights the impact of climate policies, such as the Clean Air Act, on air quality and sunlight duration. 
