First Blueberry of the Season Helps Scientists Measure Climate Change

When it comes to tracking climate change, scientists are turning to some surprising sources of data — including the humble blueberry.

Located in Milton, Massachusetts, the nation’s oldest continuously operating weather observatory has been keeping careful records for generations. Among the many things its scientists monitor is an unusual climate indicator: the date on which the very first blueberry of the season reaches ripeness.

That single piece of information, tracked year after year, helps researchers identify patterns and measure how the climate has changed over time.